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Pēteris Caune 2020-12-28 14:06:54 +02:00
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26
templates/docs/api.html
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@ -52,7 +52,7 @@ in your account.</p>
<p>Your requests to SITE_NAME Management API must authenticate using an <p>Your requests to SITE_NAME Management API must authenticate using an
API key. All API keys are project-specific. There are no account-wide API keys. API key. All API keys are project-specific. There are no account-wide API keys.
By default, a project on SITE_NAME doesn't have an API key. You can create read-write By default, a project on SITE_NAME doesn't have an API key. You can create read-write
and read-only API keys in the <strong>Project Settings</strong> page.</p> and read-only API keys on the <strong>Project Settings</strong> page.</p>
<dl> <dl>
<dt>read-write key</dt> <dt>read-write key</dt>
<dd>Has full access to all documented API endpoints.</dd> <dd>Has full access to all documented API endpoints.</dd>
@ -88,7 +88,7 @@ one or more tags.</p>
<dl> <dl>
<dt>tag=&lt;value&gt;</dt> <dt>tag=&lt;value&gt;</dt>
<dd> <dd>
<p>Filters the checks, and returns only the checks that are tagged with the <p>Filters the checks and returns only the checks that are tagged with the
specified value.</p> specified value.</p>
<p>This parameter can be repeated multiple times.</p> <p>This parameter can be repeated multiple times.</p>
<p>Example:</p> <p>Example:</p>
@ -196,7 +196,7 @@ and <a href="#list-flips">Get a list of check's status changes</a> API calls.</p
<p><code>GET SITE_ROOT/api/v1/checks/&lt;uuid&gt;</code><br> <p><code>GET SITE_ROOT/api/v1/checks/&lt;uuid&gt;</code><br>
<code>GET SITE_ROOT/api/v1/checks/&lt;unique_key&gt;</code></p> <code>GET SITE_ROOT/api/v1/checks/&lt;unique_key&gt;</code></p>
<p>Returns a JSON representation of a single check. Accepts either check's UUID or <p>Returns a JSON representation of a single check. Accepts either check's UUID or
the <code>unique_key</code> (a field derived from UUID, and returned by API responses when the <code>unique_key</code> (a field derived from UUID and returned by API responses when
using the read-only API key) as an identifier.</p> using the read-only API key) as an identifier.</p>
<h3>Response Codes</h3> <h3>Response Codes</h3>
<dl> <dl>
@ -295,7 +295,7 @@ Example:</p>
<p>number, optional, default value: {{ default_timeout }}.</p> <p>number, optional, default value: {{ default_timeout }}.</p>
<p>A number of seconds, the expected period of this check.</p> <p>A number of seconds, the expected period of this check.</p>
<p>Minimum: 60 (one minute), maximum: 2592000 (30 days).</p> <p>Minimum: 60 (one minute), maximum: 2592000 (30 days).</p>
<p>Example for 5 minute timeout:</p> <p>Example for a 5-minute timeout:</p>
<p><pre>{"kind": "simple", "timeout": 300}</pre></p> <p><pre>{"kind": "simple", "timeout": 300}</pre></p>
</dd> </dd>
<dt>grace</dt> <dt>grace</dt>
@ -357,8 +357,8 @@ UUIDs. You can look up integration UUIDs using the
"4ec5a071-2d08-4baa-898a-eb4eb3cd6941,746a083e-f542-4554-be1a-707ce16d3acc"}</pre></p> "4ec5a071-2d08-4baa-898a-eb4eb3cd6941,746a083e-f542-4554-be1a-707ce16d3acc"}</pre></p>
<p>Alternatively, if you have named your integrations in SITE_NAME dashboard, <p>Alternatively, if you have named your integrations in SITE_NAME dashboard,
you can specify integrations by their names. For this to work, your integrations you can specify integrations by their names. For this to work, your integrations
need non-empty and unique names, and they must not contain commas. The names need non-empty unique names, and they must not contain commas.
must match exactly, whitespace is significant.</p> The names must match exactly, whitespace is significant.</p>
<p>Example:</p> <p>Example:</p>
<p><pre>{"channels": "Email to Alice,SMS to Alice"}</pre></p> <p><pre>{"channels": "Email to Alice,SMS to Alice"}</pre></p>
</dd> </dd>
@ -370,9 +370,9 @@ existing checks, filtered by fields listed in <code>unique</code>.</p>
<p>If SITE_NAME does not find a matching check, it creates a new check and returns it <p>If SITE_NAME does not find a matching check, it creates a new check and returns it
with the HTTP status code 201.</p> with the HTTP status code 201.</p>
<p>If SITE_NAME finds a matching check, it updates the existing check and <p>If SITE_NAME finds a matching check, it updates the existing check and
and returns it with HTTP status code 200.</p> returns it with HTTP status code 200.</p>
<p>The accepted values for the <code>unique</code> field are <p>The accepted values for the <code>unique</code> field are
<code>name</code>, <code>tags</code>, <code>timeout</code> and <code>grace</code>.</p> <code>name</code>, <code>tags</code>, <code>timeout</code>, and <code>grace</code>.</p>
<p>Example:</p> <p>Example:</p>
<p><pre>{"name": "Backups", unique: ["name"]}</pre></p> <p><pre>{"name": "Backups", unique: ["name"]}</pre></p>
<p>In this example, if a check named "Backups" exists, it will be returned. <p>In this example, if a check named "Backups" exists, it will be returned.
@ -456,7 +456,7 @@ parameter, SITE_NAME will leave its value unchanged.</p>
<p>number, optional.</p> <p>number, optional.</p>
<p>A number of seconds, the expected period of this check.</p> <p>A number of seconds, the expected period of this check.</p>
<p>Minimum: 60 (one minute), maximum: 2592000 (30 days).</p> <p>Minimum: 60 (one minute), maximum: 2592000 (30 days).</p>
<p>Example for 5 minute timeout:</p> <p>Example for a 5-minute timeout:</p>
<p><pre>{"kind": "simple", "timeout": 300}</pre></p> <p><pre>{"kind": "simple", "timeout": 300}</pre></p>
</dd> </dd>
<dt>grace</dt> <dt>grace</dt>
@ -575,7 +575,7 @@ field values.</dd>
<h2 class="rule" id="pause-check">Pause Monitoring of a Check</h2> <h2 class="rule" id="pause-check">Pause Monitoring of a Check</h2>
<p><code>POST SITE_ROOT/api/v1/checks/&lt;uuid&gt;/pause</code></p> <p><code>POST SITE_ROOT/api/v1/checks/&lt;uuid&gt;/pause</code></p>
<p>Disables monitoring for a check, without removing it. The check goes into a "paused" <p>Disables monitoring for a check without removing it. The check goes into a "paused"
state. You can resume monitoring of the check by pinging it.</p> state. You can resume monitoring of the check by pinging it.</p>
<p>This API call has no request parameters.</p> <p>This API call has no request parameters.</p>
<h3>Response Codes</h3> <h3>Response Codes</h3>
@ -621,7 +621,7 @@ header is sometimes required by some network proxies and web servers.</p>
<h2 class="rule" id="delete-check">Delete Check</h2> <h2 class="rule" id="delete-check">Delete Check</h2>
<p><code>DELETE SITE_ROOT/api/v1/checks/&lt;uuid&gt;</code></p> <p><code>DELETE SITE_ROOT/api/v1/checks/&lt;uuid&gt;</code></p>
<p>Permanently deletes the check from user's account. Returns JSON representation of the <p>Permanently deletes the check from the user's account. Returns JSON representation of the
check that was just deleted.</p> check that was just deleted.</p>
<p>This API call has no request parameters.</p> <p>This API call has no request parameters.</p>
<h3>Response Codes</h3> <h3>Response Codes</h3>
@ -666,7 +666,7 @@ check that was just deleted.</p>
<p><code>GET SITE_ROOT/api/v1/checks/&lt;uuid&gt;/pings/</code></p> <p><code>GET SITE_ROOT/api/v1/checks/&lt;uuid&gt;/pings/</code></p>
<p>Returns a list of pings this check has received.</p> <p>Returns a list of pings this check has received.</p>
<p>This endpoint returns pings in reverse order (most recent first), and the total <p>This endpoint returns pings in reverse order (most recent first), and the total
number of returned pings depends on account's billing plan: 100 for free accounts, number of returned pings depends on the account's billing plan: 100 for free accounts,
1000 for paid accounts.</p> 1000 for paid accounts.</p>
<h3>Response Codes</h3> <h3>Response Codes</h3>
<dl> <dl>
@ -735,7 +735,7 @@ number of returned pings depends on account's billing plan: 100 for free account
<p><code>GET SITE_ROOT/api/v1/checks/&lt;uuid&gt;/flips/</code><br> <p><code>GET SITE_ROOT/api/v1/checks/&lt;uuid&gt;/flips/</code><br>
<code>GET SITE_ROOT/api/v1/checks/&lt;unique_key&gt;/flips/</code></p> <code>GET SITE_ROOT/api/v1/checks/&lt;unique_key&gt;/flips/</code></p>
<p>Returns a list of "flips" this check has experienced. A flip is a change of status <p>Returns a list of "flips" this check has experienced. A flip is a change of status
(from "down" to "up", or from "up" to "down").</p> (from "down" to "up," or from "up" to "down").</p>
<h3>Query String Parameters</h3> <h3>Query String Parameters</h3>
<dl> <dl>
<dt>seconds=&lt;value&gt;</dt> <dt>seconds=&lt;value&gt;</dt>

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@ -22,7 +22,7 @@ Endpoint Name | Endpoint Address
Your requests to SITE_NAME Management API must authenticate using an Your requests to SITE_NAME Management API must authenticate using an
API key. All API keys are project-specific. There are no account-wide API keys. API key. All API keys are project-specific. There are no account-wide API keys.
By default, a project on SITE_NAME doesn't have an API key. You can create read-write By default, a project on SITE_NAME doesn't have an API key. You can create read-write
and read-only API keys in the **Project Settings** page. and read-only API keys on the **Project Settings** page.
read-write key read-write key
: Has full access to all documented API endpoints. : Has full access to all documented API endpoints.
@ -65,7 +65,7 @@ one or more tags.
### Query String Parameters ### Query String Parameters
tag=&lt;value&gt; tag=&lt;value&gt;
: Filters the checks, and returns only the checks that are tagged with the : Filters the checks and returns only the checks that are tagged with the
specified value. specified value.
This parameter can be repeated multiple times. This parameter can be repeated multiple times.
@ -181,7 +181,7 @@ Example:
`GET SITE_ROOT/api/v1/checks/<unique_key>` `GET SITE_ROOT/api/v1/checks/<unique_key>`
Returns a JSON representation of a single check. Accepts either check's UUID or Returns a JSON representation of a single check. Accepts either check's UUID or
the `unique_key` (a field derived from UUID, and returned by API responses when the `unique_key` (a field derived from UUID and returned by API responses when
using the read-only API key) as an identifier. using the read-only API key) as an identifier.
### Response Codes ### Response Codes
@ -296,7 +296,7 @@ timeout
Minimum: 60 (one minute), maximum: 2592000 (30 days). Minimum: 60 (one minute), maximum: 2592000 (30 days).
Example for 5 minute timeout: Example for a 5-minute timeout:
<pre>{"kind": "simple", "timeout": 300}</pre> <pre>{"kind": "simple", "timeout": 300}</pre>
@ -375,8 +375,8 @@ channels
Alternatively, if you have named your integrations in SITE_NAME dashboard, Alternatively, if you have named your integrations in SITE_NAME dashboard,
you can specify integrations by their names. For this to work, your integrations you can specify integrations by their names. For this to work, your integrations
need non-empty and unique names, and they must not contain commas. The names need non-empty unique names, and they must not contain commas.
must match exactly, whitespace is significant. The names must match exactly, whitespace is significant.
Example: Example:
@ -392,10 +392,10 @@ unique
with the HTTP status code 201. with the HTTP status code 201.
If SITE_NAME finds a matching check, it updates the existing check and If SITE_NAME finds a matching check, it updates the existing check and
and returns it with HTTP status code 200. returns it with HTTP status code 200.
The accepted values for the `unique` field are The accepted values for the `unique` field are
`name`, `tags`, `timeout` and `grace`. `name`, `tags`, `timeout`, and `grace`.
Example: Example:
@ -495,7 +495,7 @@ timeout
Minimum: 60 (one minute), maximum: 2592000 (30 days). Minimum: 60 (one minute), maximum: 2592000 (30 days).
Example for 5 minute timeout: Example for a 5-minute timeout:
<pre>{"kind": "simple", "timeout": 300}</pre> <pre>{"kind": "simple", "timeout": 300}</pre>
@ -644,7 +644,7 @@ curl SITE_ROOT/api/v1/checks/f618072a-7bde-4eee-af63-71a77c5723bc \
`POST SITE_ROOT/api/v1/checks/<uuid>/pause` `POST SITE_ROOT/api/v1/checks/<uuid>/pause`
Disables monitoring for a check, without removing it. The check goes into a "paused" Disables monitoring for a check without removing it. The check goes into a "paused"
state. You can resume monitoring of the check by pinging it. state. You can resume monitoring of the check by pinging it.
This API call has no request parameters. This API call has no request parameters.
@ -700,7 +700,7 @@ header is sometimes required by some network proxies and web servers.
`DELETE SITE_ROOT/api/v1/checks/<uuid>` `DELETE SITE_ROOT/api/v1/checks/<uuid>`
Permanently deletes the check from user's account. Returns JSON representation of the Permanently deletes the check from the user's account. Returns JSON representation of the
check that was just deleted. check that was just deleted.
This API call has no request parameters. This API call has no request parameters.
@ -755,7 +755,7 @@ curl SITE_ROOT/api/v1/checks/f618072a-7bde-4eee-af63-71a77c5723bc \
Returns a list of pings this check has received. Returns a list of pings this check has received.
This endpoint returns pings in reverse order (most recent first), and the total This endpoint returns pings in reverse order (most recent first), and the total
number of returned pings depends on account's billing plan: 100 for free accounts, number of returned pings depends on the account's billing plan: 100 for free accounts,
1000 for paid accounts. 1000 for paid accounts.
### Response Codes ### Response Codes
@ -833,7 +833,7 @@ curl SITE_ROOT/api/v1/checks/f618072a-7bde-4eee-af63-71a77c5723bc/pings/ \
`GET SITE_ROOT/api/v1/checks/<unique_key>/flips/` `GET SITE_ROOT/api/v1/checks/<unique_key>/flips/`
Returns a list of "flips" this check has experienced. A flip is a change of status Returns a list of "flips" this check has experienced. A flip is a change of status
(from "down" to "up", or from "up" to "down"). (from "down" to "up," or from "up" to "down").
### Query String Parameters ### Query String Parameters

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@ -1,8 +1,9 @@
<h1>Attaching Logs</h1> <h1>Attaching Logs</h1>
<p>SITE_NAME ping endpoints accept HTTP HEAD, GET and POST request methods.</p> <p>SITE_NAME ping endpoints accept HTTP HEAD, GET and POST request methods.</p>
<p>When using HTTP POST, <strong>you can include arbitrary payload in the request body</strong>. <p>When using HTTP POST, <strong>you can include an arbitrary payload in the request body</strong>.
If the request body looks like a UTF-8 string, SITE_NAME will log the If the request body looks like a UTF-8 string, SITE_NAME will log the
first 10 kilobytes (10 000 bytes) of the request body, so you can inspect it later.</p> first 10 kilobytes (10 000 bytes) of the request body, so that you can inspect
it later.</p>
<h2>Logging Command Output</h2> <h2>Logging Command Output</h2>
<p>In this example, we run <code>certbot renew</code>, capture its output (both the stdout <p>In this example, we run <code>certbot renew</code>, capture its output (both the stdout
and stderr streams), and submit the captured output to SITE_NAME:</p> and stderr streams), and submit the captured output to SITE_NAME:</p>
@ -25,8 +26,8 @@ curl -fsS -m <span class="m">10</span> --retry <span class="m">5</span> --data-r
<h2>Using Runitor</h2> <h2>Using Runitor</h2>
<p><a href="https://github.com/bdd/runitor">Runitor</a> is a third party utility that runs the <p><a href="https://github.com/bdd/runitor">Runitor</a> is a third party utility that runs the
supplied command, captures its output and and reports to SITE_NAME. supplied command, captures its output and reports to SITE_NAME.
It also measures the execution time, and retries HTTP requests on transient errors. It also measures the execution time and retries HTTP requests on transient errors.
Best of all, the syntax is simple and clean:</p> Best of all, the syntax is simple and clean:</p>
<div class="bash highlight"><pre><span></span><code>runitor -uuid your-uuid-here -- /usr/bin/certbot renew <div class="bash highlight"><pre><span></span><code>runitor -uuid your-uuid-here -- /usr/bin/certbot renew
</code></pre></div> </code></pre></div>
@ -38,8 +39,8 @@ designed for that. If you run into the issue of logs getting cut off, consider
the following options:</p> the following options:</p>
<ul> <ul>
<li>See if the logs can be made less verbose. For example, if you have a batch job <li>See if the logs can be made less verbose. For example, if you have a batch job
that outputs a line of text per item processed, perhaps it can output a short that outputs a line of text per item processed, perhaps it can output a summary with
summary with the totals instead.</li> the totals instead.</li>
<li>If the important content is usually at the end, submit the <strong>last 10KB</strong> instead <li>If the important content is usually at the end, submit the <strong>last 10KB</strong> instead
of the first. Here is an example that submits the last 10KB of <code>dmesg</code> output:</li> of the first. Here is an example that submits the last 10KB of <code>dmesg</code> output:</li>
</ul> </ul>
@ -51,6 +52,6 @@ curl -fsS -m <span class="m">10</span> --retry <span class="m">5</span> --data-r
<ul> <ul>
<li>Finally, if for your use case it is critical to capture the entire log output, <li>Finally, if it is critical to capture the entire log output,
consider using a dedicated log aggregation service for capturing the logs.</li> consider using a dedicated log aggregation service for capturing the logs.</li>
</ul> </ul>

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@ -2,9 +2,10 @@
SITE_NAME ping endpoints accept HTTP HEAD, GET and POST request methods. SITE_NAME ping endpoints accept HTTP HEAD, GET and POST request methods.
When using HTTP POST, **you can include arbitrary payload in the request body**. When using HTTP POST, **you can include an arbitrary payload in the request body**.
If the request body looks like a UTF-8 string, SITE_NAME will log the If the request body looks like a UTF-8 string, SITE_NAME will log the
first 10 kilobytes (10 000 bytes) of the request body, so you can inspect it later. first 10 kilobytes (10 000 bytes) of the request body, so that you can inspect
it later.
## Logging Command Output ## Logging Command Output
@ -33,8 +34,8 @@ curl -fsS -m 10 --retry 5 --data-raw "$m" PING_URL/$?
## Using Runitor ## Using Runitor
[Runitor](https://github.com/bdd/runitor) is a third party utility that runs the [Runitor](https://github.com/bdd/runitor) is a third party utility that runs the
supplied command, captures its output and and reports to SITE_NAME. supplied command, captures its output and reports to SITE_NAME.
It also measures the execution time, and retries HTTP requests on transient errors. It also measures the execution time and retries HTTP requests on transient errors.
Best of all, the syntax is simple and clean: Best of all, the syntax is simple and clean:
```bash ```bash
@ -48,8 +49,8 @@ designed for that. If you run into the issue of logs getting cut off, consider
the following options: the following options:
* See if the logs can be made less verbose. For example, if you have a batch job * See if the logs can be made less verbose. For example, if you have a batch job
that outputs a line of text per item processed, perhaps it can output a short that outputs a line of text per item processed, perhaps it can output a summary with
summary with the totals instead. the totals instead.
* If the important content is usually at the end, submit the **last 10KB** instead * If the important content is usually at the end, submit the **last 10KB** instead
of the first. Here is an example that submits the last 10KB of `dmesg` output: of the first. Here is an example that submits the last 10KB of `dmesg` output:
@ -60,5 +61,5 @@ m=$(dmesg | tail --bytes=10000)
curl -fsS -m 10 --retry 5 --data-raw "$m" PING_URL curl -fsS -m 10 --retry 5 --data-raw "$m" PING_URL
``` ```
* Finally, if for your use case it is critical to capture the entire log output, * Finally, if it is critical to capture the entire log output,
consider using a dedicated log aggregation service for capturing the logs. consider using a dedicated log aggregation service for capturing the logs.

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@ -1,10 +1,10 @@
<h1>Shell Scripts</h1> <h1>Shell Scripts</h1>
<p>You can easily add SITE_NAME monitoring to a shell script. All you <p>You can easily add SITE_NAME monitoring to a shell script. All you
have to do is make a HTTP request at an appropriate place in the script. have to do is make an HTTP request at an appropriate place in the script.
<a href="https://curl.haxx.se/docs/manpage.html">curl</a> and <a href="https://curl.haxx.se/docs/manpage.html">curl</a> and
<a href="https://www.gnu.org/software/wget/manual/wget.html">wget</a> <a href="https://www.gnu.org/software/wget/manual/wget.html">wget</a>
are two common command line HTTP clients you can use.</p> are two common command-line HTTP clients you can use.</p>
<div class="bash highlight"><pre><span></span><code><span class="c1"># Sends a HTTP GET request with curl:</span> <div class="bash highlight"><pre><span></span><code><span class="c1"># Sends an HTTP GET request with curl:</span>
curl -m <span class="m">10</span> --retry <span class="m">5</span> PING_URL curl -m <span class="m">10</span> --retry <span class="m">5</span> PING_URL
<span class="c1"># Silent version (no stdout/stderr output unless curl hits an error):</span> <span class="c1"># Silent version (no stdout/stderr output unless curl hits an error):</span>
@ -17,7 +17,7 @@ curl -fsS -m <span class="m">10</span> --retry <span class="m">5</span> -o /dev/
<dt><strong>-m &lt;seconds&gt;</strong></dt> <dt><strong>-m &lt;seconds&gt;</strong></dt>
<dd>Maximum time in seconds that you allow the whole operation to take.</dd> <dd>Maximum time in seconds that you allow the whole operation to take.</dd>
<dt><strong>--retry &lt;num&gt;</strong></dt> <dt><strong>--retry &lt;num&gt;</strong></dt>
<dd>If a HTTP request fails, retry up to this many times. By default, curl <dd>If an HTTP request fails, retry up to this many times. By default, curl
uses an increasing delay between each retry (1s, 2s, 4s, 8s, ...). uses an increasing delay between each retry (1s, 2s, 4s, 8s, ...).
See also <a href="https://curl.haxx.se/docs/manpage.html#--retry-delay">--retry-delay</a>.</dd> See also <a href="https://curl.haxx.se/docs/manpage.html#--retry-delay">--retry-delay</a>.</dd>
<dt><strong>-f, --fail</strong></dt> <dt><strong>-f, --fail</strong></dt>
@ -30,10 +30,10 @@ hides error messages.</dd>
<dt><strong>-o /dev/null</strong></dt> <dt><strong>-o /dev/null</strong></dt>
<dd>Redirect curl's stdout to /dev/null (error messages still go to stderr).</dd> <dd>Redirect curl's stdout to /dev/null (error messages still go to stderr).</dd>
</dl> </dl>
<h2>Signalling Failure from Shell Scripts</h2> <h2>Signaling Failure from Shell Scripts</h2>
<p>You can append <code>/fail</code> or <code>/{exit-status}</code> to any ping URL and use the resulting URL <p>You can append <code>/fail</code> or <code>/{exit-status}</code> to any ping URL and use the resulting URL
to actively signal a failure. The exit status should be a 0-255 integer. to actively signal a failure. The exit status should be a 0-255 integer.
SITE_NAME will interpret exit status 0 as success, and all non-zero values as failures.</p> SITE_NAME will interpret exit status 0 as success and all non-zero values as failures.</p>
<p>The following example runs <code>/usr/bin/certbot renew</code>, and uses the <code>$?</code> variable to <p>The following example runs <code>/usr/bin/certbot renew</code>, and uses the <code>$?</code> variable to
look up its exit status:</p> look up its exit status:</p>
<div class="bash highlight"><pre><span></span><code><span class="ch">#!/bin/sh</span> <div class="bash highlight"><pre><span></span><code><span class="ch">#!/bin/sh</span>
@ -46,9 +46,9 @@ curl -m <span class="m">10</span> --retry <span class="m">5</span> PING_URL/<spa
<h2>Logging Command Output</h2> <h2>Logging Command Output</h2>
<p>When pinging with HTTP POST, you can put extra diagnostic information in request <p>When pinging with HTTP POST, you can put extra diagnostic information in the request
body. If the request body looks like a valid UTF-8 string, SITE_NAME body. If the request body looks like a valid UTF-8 string, SITE_NAME
will accept and store first 10KB of the request body.</p> will accept and store the first 10KB of the request body.</p>
<p>In the below example, certbot's output is captured and submitted via HTTP POST:</p> <p>In the below example, certbot's output is captured and submitted via HTTP POST:</p>
<div class="bash highlight"><pre><span></span><code><span class="ch">#!/bin/sh</span> <div class="bash highlight"><pre><span></span><code><span class="ch">#!/bin/sh</span>
@ -59,7 +59,7 @@ curl -fsS -m <span class="m">10</span> --retry <span class="m">5</span> --data-r
<h2>Auto-provisioning New Checks</h2> <h2>Auto-provisioning New Checks</h2>
<p>This example uses SITE_NAME <a href="../api/">Management API</a> to create a check "on the fly" <p>This example uses SITE_NAME <a href="../api/">Management API</a> to create a check "on the fly"
(if it does not already exist) and to retrieve its ping URL. (if it does not already exist) and retrieve its ping URL.
Using this technique, you can write services that automatically Using this technique, you can write services that automatically
register with SITE_NAME the first time they run.</p> register with SITE_NAME the first time they run.</p>
<div class="bash highlight"><pre><span></span><code><span class="ch">#!/bin/bash</span> <div class="bash highlight"><pre><span></span><code><span class="ch">#!/bin/bash</span>

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# Shell Scripts # Shell Scripts
You can easily add SITE_NAME monitoring to a shell script. All you You can easily add SITE_NAME monitoring to a shell script. All you
have to do is make a HTTP request at an appropriate place in the script. have to do is make an HTTP request at an appropriate place in the script.
[curl](https://curl.haxx.se/docs/manpage.html) and [curl](https://curl.haxx.se/docs/manpage.html) and
[wget](https://www.gnu.org/software/wget/manual/wget.html) [wget](https://www.gnu.org/software/wget/manual/wget.html)
are two common command line HTTP clients you can use. are two common command-line HTTP clients you can use.
```bash ```bash
# Sends a HTTP GET request with curl: # Sends an HTTP GET request with curl:
curl -m 10 --retry 5 PING_URL curl -m 10 --retry 5 PING_URL
# Silent version (no stdout/stderr output unless curl hits an error): # Silent version (no stdout/stderr output unless curl hits an error):
@ -21,7 +21,7 @@ Here's what each curl parameter does:
: Maximum time in seconds that you allow the whole operation to take. : Maximum time in seconds that you allow the whole operation to take.
**--retry &lt;num&gt;** **--retry &lt;num&gt;**
: If a HTTP request fails, retry up to this many times. By default, curl : If an HTTP request fails, retry up to this many times. By default, curl
uses an increasing delay between each retry (1s, 2s, 4s, 8s, ...). uses an increasing delay between each retry (1s, 2s, 4s, 8s, ...).
See also [--retry-delay](https://curl.haxx.se/docs/manpage.html#--retry-delay). See also [--retry-delay](https://curl.haxx.se/docs/manpage.html#--retry-delay).
@ -38,11 +38,11 @@ Here's what each curl parameter does:
**-o /dev/null** **-o /dev/null**
: Redirect curl's stdout to /dev/null (error messages still go to stderr). : Redirect curl's stdout to /dev/null (error messages still go to stderr).
## Signalling Failure from Shell Scripts ## Signaling Failure from Shell Scripts
You can append `/fail` or `/{exit-status}` to any ping URL and use the resulting URL You can append `/fail` or `/{exit-status}` to any ping URL and use the resulting URL
to actively signal a failure. The exit status should be a 0-255 integer. to actively signal a failure. The exit status should be a 0-255 integer.
SITE_NAME will interpret exit status 0 as success, and all non-zero values as failures. SITE_NAME will interpret exit status 0 as success and all non-zero values as failures.
The following example runs `/usr/bin/certbot renew`, and uses the `$?` variable to The following example runs `/usr/bin/certbot renew`, and uses the `$?` variable to
look up its exit status: look up its exit status:
@ -58,9 +58,9 @@ curl -m 10 --retry 5 PING_URL/$?
## Logging Command Output ## Logging Command Output
When pinging with HTTP POST, you can put extra diagnostic information in request When pinging with HTTP POST, you can put extra diagnostic information in the request
body. If the request body looks like a valid UTF-8 string, SITE_NAME body. If the request body looks like a valid UTF-8 string, SITE_NAME
will accept and store first 10KB of the request body. will accept and store the first 10KB of the request body.
In the below example, certbot's output is captured and submitted via HTTP POST: In the below example, certbot's output is captured and submitted via HTTP POST:
@ -74,7 +74,7 @@ curl -fsS -m 10 --retry 5 --data-raw "$m" PING_URL
## Auto-provisioning New Checks ## Auto-provisioning New Checks
This example uses SITE_NAME [Management API](../api/) to create a check "on the fly" This example uses SITE_NAME [Management API](../api/) to create a check "on the fly"
(if it does not already exist) and to retrieve its ping URL. (if it does not already exist) and retrieve its ping URL.
Using this technique, you can write services that automatically Using this technique, you can write services that automatically
register with SITE_NAME the first time they run. register with SITE_NAME the first time they run.

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@ -2,20 +2,20 @@
<p>You can clone individual checks from the "Check Details" <p>You can clone individual checks from the "Check Details"
page:</p> page:</p>
<p><img alt="The &quot;Create a Copy&quot; button" src="IMG_URL/create_copy.png" /></p> <p><img alt="The &quot;Create a Copy&quot; button" src="IMG_URL/create_copy.png" /></p>
<p>The "Create a Copy..." function creates a new check in the same project, and copies <p>The "Create a Copy..." function creates a new check in the same project and copies
over the following:</p> over the following:</p>
<ul> <ul>
<li>Name, tags, description</li> <li>Name, tags, description</li>
<li>Schedule</li> <li>Schedule</li>
<li>Assigned notification methods</li> <li>Assigned notification methods</li>
</ul> </ul>
<p>The newly created check has a different ping URL and it starts with an empty log.</p> <p>The newly created check has a different ping URL, and it starts with an empty log.</p>
<h2>Cloning All Checks Into a New Project</h2> <h2>Cloning All Checks Into a New Project</h2>
<p>It is sometimes useful to clone an entire project. For example, when recreating <p>It is sometimes useful to clone an entire project. For example, when recreating
an existing deployment in a new region. The SITE_NAME web interface does an existing deployment in a new region. The SITE_NAME web interface does
not have a function to clone an entire project, but this can be done relatively not have a function to clone an entire project, but you can clone all checks in the
easily using the <a href="../api/">Management API</a> calls. Below is an example using Python project relatively easily using the <a href="../api/">Management API</a> calls.
and the requests library:</p> Below is an example using Python and the <a href="https://requests.readthedocs.io/en/master/">requests</a> library:</p>
<div class="python highlight"><pre><span></span><code><span class="kn">import</span> <span class="nn">requests</span> <div class="python highlight"><pre><span></span><code><span class="kn">import</span> <span class="nn">requests</span>
<span class="n">API_URL</span> <span class="o">=</span> <span class="s2">&quot;SITE_ROOT/api/v1/checks/&quot;</span> <span class="n">API_URL</span> <span class="o">=</span> <span class="s2">&quot;SITE_ROOT/api/v1/checks/&quot;</span>

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@ -5,22 +5,22 @@ page:
![The "Create a Copy" button](IMG_URL/create_copy.png) ![The "Create a Copy" button](IMG_URL/create_copy.png)
The "Create a Copy..." function creates a new check in the same project, and copies The "Create a Copy..." function creates a new check in the same project and copies
over the following: over the following:
* Name, tags, description * Name, tags, description
* Schedule * Schedule
* Assigned notification methods * Assigned notification methods
The newly created check has a different ping URL and it starts with an empty log. The newly created check has a different ping URL, and it starts with an empty log.
## Cloning All Checks Into a New Project ## Cloning All Checks Into a New Project
It is sometimes useful to clone an entire project. For example, when recreating It is sometimes useful to clone an entire project. For example, when recreating
an existing deployment in a new region. The SITE_NAME web interface does an existing deployment in a new region. The SITE_NAME web interface does
not have a function to clone an entire project, but this can be done relatively not have a function to clone an entire project, but you can clone all checks in the
easily using the [Management API](../api/) calls. Below is an example using Python project relatively easily using the [Management API](../api/) calls.
and the requests library: Below is an example using Python and the [requests](https://requests.readthedocs.io/en/master/) library:
```python ```python
import requests import requests

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@ -9,9 +9,9 @@ either in SITE_NAME web interface or by calling <a href="../api/">Management API
<p><img alt="Editing name, tags and description" src="IMG_URL/edit_name.png" /></p> <p><img alt="Editing name, tags and description" src="IMG_URL/edit_name.png" /></p>
<ul> <ul>
<li><strong>Name</strong>: names are optional, but it is a good idea to set them. <li><strong>Name</strong>: names are optional, but it is a good idea to set them.
Good naming becomes especially important as you add more checks in the Good naming becomes especially important as you add more checks to the
account. SITE_NAME will display check names in the web interface, in email reports, account. SITE_NAME will display check names in the web interface, in email reports,
and in notifications.</li> and notifications.</li>
<li><strong>Tags</strong>: a space-separated list of optional labels. Use tags to organize and group <li><strong>Tags</strong>: a space-separated list of optional labels. Use tags to organize and group
checks within a project. You can tag checks by the environment checks within a project. You can tag checks by the environment
(<code>prod</code>, <code>staging</code>, <code>dev</code>, etc.) or by role (<code>www</code>, <code>db</code>, <code>worker</code>, etc.) or using (<code>prod</code>, <code>staging</code>, <code>dev</code>, etc.) or by role (<code>www</code>, <code>db</code>, <code>worker</code>, etc.) or using

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@ -13,9 +13,9 @@ Describe each check using an optional name, tags, and description fields.
![Editing name, tags and description](IMG_URL/edit_name.png) ![Editing name, tags and description](IMG_URL/edit_name.png)
* **Name**: names are optional, but it is a good idea to set them. * **Name**: names are optional, but it is a good idea to set them.
Good naming becomes especially important as you add more checks in the Good naming becomes especially important as you add more checks to the
account. SITE_NAME will display check names in the web interface, in email reports, account. SITE_NAME will display check names in the web interface, in email reports,
and in notifications. and notifications.
* **Tags**: a space-separated list of optional labels. Use tags to organize and group * **Tags**: a space-separated list of optional labels. Use tags to organize and group
checks within a project. You can tag checks by the environment checks within a project. You can tag checks by the environment
(`prod`, `staging`, `dev`, etc.) or by role (`www`, `db`, `worker`, etc.) or using (`prod`, `staging`, `dev`, etc.) or by role (`www`, `db`, `worker`, etc.) or using

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@ -1,6 +1,6 @@
<h1>Configuring Notifications</h1> <h1>Configuring Notifications</h1>
<p>You can set up multiple ways to receive notifications when checks in your account <p>You can set up multiple ways to receive notifications when checks in your account
change state. This is useful for several reasons:</p> change state. Doing so is useful for several reasons:</p>
<ul> <ul>
<li><strong>Redundancy in case of notification failures.</strong> Set up notifications using two <li><strong>Redundancy in case of notification failures.</strong> Set up notifications using two
different notification channels (for example, email and Slack). If one transport different notification channels (for example, email and Slack). If one transport
@ -8,7 +8,7 @@ fails (e.g., an email message goes to spam), you still receive a notification ov
other channel.</li> other channel.</li>
<li><strong>Use different notification methods depending on urgency</strong>. For example, if a <li><strong>Use different notification methods depending on urgency</strong>. For example, if a
low-priority housekeeping script fails, post a message in chat. If a vital service fails, low-priority housekeeping script fails, post a message in chat. If a vital service fails,
post in chat, send an email and send SMS.</li> post in chat, send an email, and send SMS.</li>
<li>Route notifications to the right people.</li> <li>Route notifications to the right people.</li>
</ul> </ul>
<p>Each notification method ("integration") belongs to a project: <p>Each notification method ("integration") belongs to a project:
@ -27,8 +27,8 @@ account's billing plan. The quota automatically resets at the start of each mont
The "unused" sends from one month do not carry over to the next month.</p> The "unused" sends from one month do not carry over to the next month.</p>
<p>When an account exceeds its monthly limit, SITE_NAME will:</p> <p>When an account exceeds its monthly limit, SITE_NAME will:</p>
<ul> <ul>
<li>Send a warning email to account's primary email address</li> <li>Send a warning email to the account's primary email address</li>
<li>Show a warning message in the <strong>Integrations</strong> page</li> <li>Show a warning message on the <strong>Integrations</strong> page</li>
</ul> </ul>
<h2>Repeated Notifications</h2> <h2>Repeated Notifications</h2>
<p>If you want to receive repeated notifications for as long as a particular check is <p>If you want to receive repeated notifications for as long as a particular check is
@ -46,10 +46,10 @@ Set them up in <a href="../../accounts/profile/notifications/">Account Settings
<p><img alt="Email reminder options" src="IMG_URL/email_reports.png" /></p> <p><img alt="Email reminder options" src="IMG_URL/email_reports.png" /></p>
<h2>Monthly Reports</h2> <h2>Monthly Reports</h2>
<p>SITE_NAME sends monthly email reports at the start of each month. Use them <p>SITE_NAME sends monthly email reports at the start of each month. Use them
to make sure all checks have their expected state and nothing has to make sure all checks have their expected state, and nothing has
"fallen through the cracks."</p> "fallen through the cracks."</p>
<p>A monthly report shows checks from all your projects. <p>A monthly report shows checks from all your projects.
For each check it lists:</p> For each check, it lists:</p>
<ul> <ul>
<li>check's current status</li> <li>check's current status</li>
<li>the number of downtimes by month, for the last two months</li> <li>the number of downtimes by month, for the last two months</li>

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@ -1,7 +1,7 @@
# Configuring Notifications # Configuring Notifications
You can set up multiple ways to receive notifications when checks in your account You can set up multiple ways to receive notifications when checks in your account
change state. This is useful for several reasons: change state. Doing so is useful for several reasons:
* **Redundancy in case of notification failures.** Set up notifications using two * **Redundancy in case of notification failures.** Set up notifications using two
different notification channels (for example, email and Slack). If one transport different notification channels (for example, email and Slack). If one transport
@ -9,7 +9,7 @@ fails (e.g., an email message goes to spam), you still receive a notification ov
other channel. other channel.
* **Use different notification methods depending on urgency**. For example, if a * **Use different notification methods depending on urgency**. For example, if a
low-priority housekeeping script fails, post a message in chat. If a vital service fails, low-priority housekeeping script fails, post a message in chat. If a vital service fails,
post in chat, send an email and send SMS. post in chat, send an email, and send SMS.
* Route notifications to the right people. * Route notifications to the right people.
Each notification method ("integration") belongs to a project: Each notification method ("integration") belongs to a project:
@ -35,8 +35,8 @@ The "unused" sends from one month do not carry over to the next month.
When an account exceeds its monthly limit, SITE_NAME will: When an account exceeds its monthly limit, SITE_NAME will:
* Send a warning email to account's primary email address * Send a warning email to the account's primary email address
* Show a warning message in the **Integrations** page * Show a warning message on the **Integrations** page
## Repeated Notifications ## Repeated Notifications
@ -58,11 +58,11 @@ Set them up in [Account Settings › Email Reports](../../accounts/profile/notif
## Monthly Reports ## Monthly Reports
SITE_NAME sends monthly email reports at the start of each month. Use them SITE_NAME sends monthly email reports at the start of each month. Use them
to make sure all checks have their expected state and nothing has to make sure all checks have their expected state, and nothing has
"fallen through the cracks." "fallen through the cracks."
A monthly report shows checks from all your projects. A monthly report shows checks from all your projects.
For each check it lists: For each check, it lists:
* check's current status * check's current status
* the number of downtimes by month, for the last two months * the number of downtimes by month, for the last two months

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@ -2,7 +2,7 @@
<p>Healthchecks.io supports exporting metrics and check statuses to <p>Healthchecks.io supports exporting metrics and check statuses to
<a href="https://prometheus.io/">Prometheus</a>, for use with <a href="https://grafana.com/">Grafana</a>.</p> <a href="https://prometheus.io/">Prometheus</a>, for use with <a href="https://grafana.com/">Grafana</a>.</p>
<p>You can generate the metrics export endpoint by going to your project settings <p>You can generate the metrics export endpoint by going to your project settings
and clicking "Create API Keys". You will then see the link to and clicking "Create API Keys." You will then see the link to
the Prometheus endpoint:</p> the Prometheus endpoint:</p>
<p><img alt="Project's API Keys" src="IMG_URL/prometheus_endpoint.png" /></p> <p><img alt="Project's API Keys" src="IMG_URL/prometheus_endpoint.png" /></p>
<h2>Update the prometheus.yml</h2> <h2>Update the prometheus.yml</h2>
@ -17,4 +17,4 @@ the Prometheus endpoint:</p>
<p>Notice how we split up the URL and paste in the scheme, domain, and path separately.</p> <p>Notice how we split up the URL and paste in the scheme, domain, and path separately.</p>
<p>Reload Prometheus and your changes should be live, coming in under the <code>hc_</code> prefix.</p> <p>Reload Prometheus, and your changes should be live, coming in under the <code>hc_</code> prefix.</p>

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@ -4,7 +4,7 @@ Healthchecks.io supports exporting metrics and check statuses to
[Prometheus](https://prometheus.io/), for use with [Grafana](https://grafana.com/). [Prometheus](https://prometheus.io/), for use with [Grafana](https://grafana.com/).
You can generate the metrics export endpoint by going to your project settings You can generate the metrics export endpoint by going to your project settings
and clicking "Create API Keys". You will then see the link to and clicking "Create API Keys." You will then see the link to
the Prometheus endpoint: the Prometheus endpoint:
![Project's API Keys](IMG_URL/prometheus_endpoint.png) ![Project's API Keys](IMG_URL/prometheus_endpoint.png)
@ -24,4 +24,4 @@ You can copy the Prometheus endpoint URL and add it to the Prometheus configurat
Notice how we split up the URL and paste in the scheme, domain, and path separately. Notice how we split up the URL and paste in the scheme, domain, and path separately.
Reload Prometheus and your changes should be live, coming in under the `hc_` prefix. Reload Prometheus, and your changes should be live, coming in under the `hc_` prefix.

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@ -1,5 +1,5 @@
<h1>C#</h1> <h1>C#</h1>
<p>Below is an example of making a HTTP request to SITE_NAME from C#.</p> <p>Below is an example of making an HTTP request to SITE_NAME from C#.</p>
<div class="csharp highlight"><pre><span></span><code><span class="k">using</span> <span class="p">(</span><span class="kt">var</span> <span class="n">client</span> <span class="p">=</span> <span class="k">new</span> <span class="n">System</span><span class="p">.</span><span class="n">Net</span><span class="p">.</span><span class="n">WebClient</span><span class="p">())</span> <div class="csharp highlight"><pre><span></span><code><span class="k">using</span> <span class="p">(</span><span class="kt">var</span> <span class="n">client</span> <span class="p">=</span> <span class="k">new</span> <span class="n">System</span><span class="p">.</span><span class="n">Net</span><span class="p">.</span><span class="n">WebClient</span><span class="p">())</span>
<span class="p">{</span> <span class="p">{</span>
<span class="n">client</span><span class="p">.</span><span class="n">DownloadString</span><span class="p">(</span><span class="s">&quot;PING_URL&quot;</span><span class="p">);</span> <span class="n">client</span><span class="p">.</span><span class="n">DownloadString</span><span class="p">(</span><span class="s">&quot;PING_URL&quot;</span><span class="p">);</span>

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@ -1,6 +1,6 @@
# C\# # C\#
Below is an example of making a HTTP request to SITE_NAME from C#. Below is an example of making an HTTP request to SITE_NAME from C#.
```csharp ```csharp
using (var client = new System.Net.WebClient()) using (var client = new System.Net.WebClient())

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@ -1,13 +1,13 @@
<h1>Email</h1> <h1>Email</h1>
<p>As an alternative to HTTP/HTTPS requests, you can "ping" checks by <p>As an alternative to HTTP/HTTPS requests, you can "ping" checks by
sending an emails to special email addresses.</p> sending email messages to special email addresses.</p>
<p><img alt="Email address for pinging via email" src="IMG_URL/emails.png" /></p> <p><img alt="Email address for pinging via email" src="IMG_URL/emails.png" /></p>
<h2>Use Case: Newsletter Delivery Monitoring</h2> <h2>Use Case: Newsletter Delivery Monitoring</h2>
<p>Consider a cron job which runs weekly and sends weekly newsletters <p>Consider a cron job that runs weekly and sends weekly newsletters
to a list of e-mail addresses. You have already set up a check to get alerted to a list of email addresses. You have already set up a check to get alerted
when your cron job fails to run. But what you ultimately want to check is if when your cron job fails to run. But what you ultimately want to check is if
<strong>your emails are getting sent and delivered</strong>.</p> <strong>your emails are getting sent and delivered</strong>.</p>
<p>The solution: set up another check, and add its email address to your list of <p>The solution: set up another check, and add its email address to your list of
recipient email addresses. Set its Period to 1 week. As long as your weekly email recipient email addresses. Set its Period to 1 week. As long as your weekly email
script runs correctly, and there are no email delivery issues, script runs correctly, and there are no email delivery issues,
SITE_NAME will regularly receive an email, and the check and will stay up.</p> SITE_NAME will regularly receive an email, and the check will stay up.</p>

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@ -1,18 +1,18 @@
# Email # Email
As an alternative to HTTP/HTTPS requests, you can "ping" checks by As an alternative to HTTP/HTTPS requests, you can "ping" checks by
sending an emails to special email addresses. sending email messages to special email addresses.
![Email address for pinging via email](IMG_URL/emails.png) ![Email address for pinging via email](IMG_URL/emails.png)
## Use Case: Newsletter Delivery Monitoring ## Use Case: Newsletter Delivery Monitoring
Consider a cron job which runs weekly and sends weekly newsletters Consider a cron job that runs weekly and sends weekly newsletters
to a list of e-mail addresses. You have already set up a check to get alerted to a list of email addresses. You have already set up a check to get alerted
when your cron job fails to run. But what you ultimately want to check is if when your cron job fails to run. But what you ultimately want to check is if
**your emails are getting sent and delivered**. **your emails are getting sent and delivered**.
The solution: set up another check, and add its email address to your list of The solution: set up another check, and add its email address to your list of
recipient email addresses. Set its Period to 1 week. As long as your weekly email recipient email addresses. Set its Period to 1 week. As long as your weekly email
script runs correctly, and there are no email delivery issues, script runs correctly, and there are no email delivery issues,
SITE_NAME will regularly receive an email, and the check and will stay up. SITE_NAME will regularly receive an email, and the check will stay up.

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@ -1,5 +1,5 @@
<h1>Go</h1> <h1>Go</h1>
<p>Below is an example of making a HTTP request to SITE_NAME from Go.</p> <p>Below is an example of making an HTTP request to SITE_NAME from Go.</p>
<div class="go highlight"><pre><span></span><code><span class="kn">package</span> <span class="nx">main</span> <div class="go highlight"><pre><span></span><code><span class="kn">package</span> <span class="nx">main</span>
<span class="kn">import</span> <span class="s">&quot;fmt&quot;</span> <span class="kn">import</span> <span class="s">&quot;fmt&quot;</span>

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@ -1,6 +1,6 @@
# Go # Go
Below is an example of making a HTTP request to SITE_NAME from Go. Below is an example of making an HTTP request to SITE_NAME from Go.
```go ```go
package main package main

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@ -70,8 +70,8 @@ OK
</code></pre></div> </code></pre></div>
<p>Sends a "job has started!" message to SITE_NAME. This is <p>Sends a "job has started!" message to SITE_NAME. Sending a "start" signal is
optional but enables a few extra features:</p> optional, but it enables a few extra features:</p>
<ul> <ul>
<li>SITE_NAME will measure and display job execution times</li> <li>SITE_NAME will measure and display job execution times</li>
<li>SITE_NAME will detect if the job runs longer than its configured grace time</li> <li>SITE_NAME will detect if the job runs longer than its configured grace time</li>
@ -101,7 +101,7 @@ OK
<p>Sends a success or failure signal depending on the exit status <p>Sends a success or failure signal depending on the exit status
included in the URL. The exit status is a 0-255 integer. SITE_NAME included in the URL. The exit status is a 0-255 integer. SITE_NAME
interprets 0 as success, and all other values as failure.</p> interprets 0 as success and all other values as failure.</p>
<p><strong>Example</strong></p> <p><strong>Example</strong></p>
<div class="http highlight"><pre><span></span><code><span class="nf">GET</span> <span class="nn">/5bf66975-d4c7-4bf5-bcc8-b8d8a82ea278/1</span> <span class="kr">HTTP</span><span class="o">/</span><span class="m">1.0</span> <div class="http highlight"><pre><span></span><code><span class="nf">GET</span> <span class="nn">/5bf66975-d4c7-4bf5-bcc8-b8d8a82ea278/1</span> <span class="kr">HTTP</span><span class="o">/</span><span class="m">1.0</span>
<span class="na">Host</span><span class="o">:</span> <span class="l">hc-ping.com</span> <span class="na">Host</span><span class="o">:</span> <span class="l">hc-ping.com</span>

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@ -81,8 +81,8 @@ OK
HEAD|GET|POST PING_ENDPOINT{uuid}/start HEAD|GET|POST PING_ENDPOINT{uuid}/start
``` ```
Sends a "job has started!" message to SITE_NAME. This is Sends a "job has started!" message to SITE_NAME. Sending a "start" signal is
optional but enables a few extra features: optional, but it enables a few extra features:
* SITE_NAME will measure and display job execution times * SITE_NAME will measure and display job execution times
* SITE_NAME will detect if the job runs longer than its configured grace time * SITE_NAME will detect if the job runs longer than its configured grace time
@ -114,7 +114,7 @@ HEAD|GET|POST PING_ENDPOINT{uuid}/{exit-status}
Sends a success or failure signal depending on the exit status Sends a success or failure signal depending on the exit status
included in the URL. The exit status is a 0-255 integer. SITE_NAME included in the URL. The exit status is a 0-255 integer. SITE_NAME
interprets 0 as success, and all other values as failure. interprets 0 as success and all other values as failure.
**Example** **Example**

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<h1>Javascript</h1> <h1>Javascript</h1>
<p>Below is an example of making a HTTP request to SITE_NAME from Node.js.</p> <p>Below is an example of making an HTTP request to SITE_NAME from Node.js.</p>
<div class="js highlight"><pre><span></span><code><span class="kd">var</span> <span class="nx">https</span> <span class="o">=</span> <span class="nx">require</span><span class="p">(</span><span class="s1">&#39;https&#39;</span><span class="p">);</span> <div class="js highlight"><pre><span></span><code><span class="kd">var</span> <span class="nx">https</span> <span class="o">=</span> <span class="nx">require</span><span class="p">(</span><span class="s1">&#39;https&#39;</span><span class="p">);</span>
<span class="nx">https</span><span class="p">.</span><span class="nx">get</span><span class="p">(</span><span class="s1">&#39;PING_URL&#39;</span><span class="p">).</span><span class="nx">on</span><span class="p">(</span><span class="s1">&#39;error&#39;</span><span class="p">,</span> <span class="p">(</span><span class="nx">err</span><span class="p">)</span> <span class="p">=&gt;</span> <span class="p">{</span> <span class="nx">https</span><span class="p">.</span><span class="nx">get</span><span class="p">(</span><span class="s1">&#39;PING_URL&#39;</span><span class="p">).</span><span class="nx">on</span><span class="p">(</span><span class="s1">&#39;error&#39;</span><span class="p">,</span> <span class="p">(</span><span class="nx">err</span><span class="p">)</span> <span class="p">=&gt;</span> <span class="p">{</span>
<span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="s1">&#39;Ping failed: &#39;</span> <span class="o">+</span> <span class="nx">err</span><span class="p">)</span> <span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="s1">&#39;Ping failed: &#39;</span> <span class="o">+</span> <span class="nx">err</span><span class="p">)</span>

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# Javascript # Javascript
Below is an example of making a HTTP request to SITE_NAME from Node.js. Below is an example of making an HTTP request to SITE_NAME from Node.js.
```js ```js
var https = require('https'); var https = require('https');

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@ -1,11 +1,11 @@
<h1>Measuring Script Run Time</h1> <h1>Measuring Script Run Time</h1>
<p>Append <code>/start</code> to a ping URL and use it to signal when a job starts. <p>Append <code>/start</code> to a ping URL and use it to signal when a job starts.
After receiving a start signal, Healthchecks.io will show the check as "Started". After receiving a start signal, Healthchecks.io will show the check as "Started."
It will store the "start" events and display the job execution times. The job It will store the "start" events and display the job execution times. SITE_NAME
execution times are calculated as the time gaps between adjacent "start" and calculates the job execution times as the time gaps between adjacent "start" and
"complete" events.</p> "complete" events.</p>
<p>Signalling a start kicks off a separate timer: the job now <strong>must</strong> signal a <p>Signaling a start kicks off a separate timer: the job now <strong>must</strong> signal a
success within its configured "Grace Time", or it will get marked as "down".</p> success within its configured "Grace Time," or it will get marked as "down."</p>
<p>Below is a code example in Python:</p> <p>Below is a code example in Python:</p>
<div class="python highlight"><pre><span></span><code><span class="kn">import</span> <span class="nn">requests</span> <div class="python highlight"><pre><span></span><code><span class="kn">import</span> <span class="nn">requests</span>
<span class="n">URL</span> <span class="o">=</span> <span class="s2">&quot;PING_URL&quot;</span> <span class="n">URL</span> <span class="o">=</span> <span class="s2">&quot;PING_URL&quot;</span>

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# Measuring Script Run Time # Measuring Script Run Time
Append `/start` to a ping URL and use it to signal when a job starts. Append `/start` to a ping URL and use it to signal when a job starts.
After receiving a start signal, Healthchecks.io will show the check as "Started". After receiving a start signal, Healthchecks.io will show the check as "Started."
It will store the "start" events and display the job execution times. The job It will store the "start" events and display the job execution times. SITE_NAME
execution times are calculated as the time gaps between adjacent "start" and calculates the job execution times as the time gaps between adjacent "start" and
"complete" events. "complete" events.
Signalling a start kicks off a separate timer: the job now **must** signal a Signaling a start kicks off a separate timer: the job now **must** signal a
success within its configured "Grace Time", or it will get marked as "down". success within its configured "Grace Time," or it will get marked as "down."
Below is a code example in Python: Below is a code example in Python:

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<h1>Monitoring Cron Jobs</h1> <h1>Monitoring Cron Jobs</h1>
<p>SITE_NAME is perfectly suited for monitoring cron jobs. All you have to do is <p>SITE_NAME is perfectly suited for monitoring cron jobs. All you have to do is
update your cron job command to send a HTTP request to SITE_NAME update your cron job command to send an HTTP request to SITE_NAME
after a job completes.</p> after completing the job.</p>
<p>Let's look at an example:</p> <p>Let's look at an example:</p>
<div class="bash highlight"><pre><span></span><code>$ crontab -l <div class="bash highlight"><pre><span></span><code>$ crontab -l
<span class="c1"># m h dom mon dow command</span> <span class="c1"># m h dom mon dow command</span>
@ -11,10 +11,10 @@ after a job completes.</p>
<p>The above job runs <code>/home/user/backup.sh</code> every day at 6:08. The backup <p>The above job runs <code>/home/user/backup.sh</code> every day at 6:08. The backup
script is presumably a headless, background process. Even if it works script is presumably a headless, background process. Even if it works
correctly currently, it can start silently failing in future, without correctly currently, it can start silently failing in the future without
anyone noticing.</p> anyone noticing.</p>
<p>You can set up SITE_NAME to notify you whenever the backup script does not <p>You can set up SITE_NAME to notify you whenever the backup script does not
run on time or does not complete successfully. Here are the steps to do that.</p> run on time, or it does not complete successfully. Here are the steps to do that.</p>
<ol> <ol>
<li> <li>
<p>If you have not already, sign up for a free SITE_NAME account.</p> <p>If you have not already, sign up for a free SITE_NAME account.</p>
@ -46,20 +46,20 @@ after the command:</p>
</code></pre></div> </code></pre></div>
<p>Now, each time your cron job runs, it will send a HTTP request to the ping URL. <p>Now, each time your cron job runs, it will send an HTTP request to the ping URL.
Since SITE_NAME knows the schedule of your cron job, it can calculate Since SITE_NAME knows your cron job's schedule, it can calculate
the dates and times when the job should run. As soon as your cron job doesn't the dates and times when the job should run. As soon as your cron job doesn't
report at an expected time, SITE_NAME will send you a notification.</p> report at an expected time, SITE_NAME will send you a notification.</p>
<p>This monitoring technique takes care of various failure scenarios that could <p>This monitoring technique takes care of various failure scenarios that could
potentially go unnoticed otherwise:</p> potentially go unnoticed otherwise:</p>
<ul> <ul>
<li>The whole machine goes down (power outage, janitor stumbles on wires, VPS provider problems, etc.)</li> <li>The whole machine goes down (power outage, janitor stumbles on wires, VPS provider problems, etc.)</li>
<li>cron daemon is not running, or has invalid configuration</li> <li>the cron daemon is not running or has an invalid configuration</li>
<li>cron does start your task, but the task exits with non-zero exit code</li> <li>cron does start your task, but the task exits with a non-zero exit code</li>
</ul> </ul>
<h2>Curl Options</h2> <h2>Curl Options</h2>
<p>The extra options in the above example tells curl to retry failed HTTP requests, and <p>The extra options in the above example tell curl to retry failed HTTP requests, and
to silence output unless there is an error. Feel free to adjust the curl options to silence output unless there is an error. Feel free to adjust the curl options to
suit your needs.</p> suit your needs.</p>
<dl> <dl>
<dt><strong>&amp;&amp;</strong></dt> <dt><strong>&amp;&amp;</strong></dt>
@ -80,8 +80,8 @@ Transient error is a timeout or an HTTP 5xx response code.</dd>
</dl> </dl>
<h2>Looking up Your Machine's Time Zone</h2> <h2>Looking up Your Machine's Time Zone</h2>
<p>If your cron job consistently pings SITE_NAME an hour early or an hour late, <p>If your cron job consistently pings SITE_NAME an hour early or an hour late,
the likely cause is a timezone mismatch: your machine may be using a different timezone the likely cause is a timezone mismatch: your machine may be using a timezone
than what is configured on SITE_NAME.</p> different from what you have configured on SITE_NAME.</p>
<p>On modern GNU/Linux systems, you can look up the time zone using the <p>On modern GNU/Linux systems, you can look up the time zone using the
<code>timedatectl status</code> command and looking for "Time zone" in its output:</p> <code>timedatectl status</code> command and looking for "Time zone" in its output:</p>
<div class="text highlight"><pre><span></span><code>$ timedatectl status <div class="text highlight"><pre><span></span><code>$ timedatectl status
@ -104,6 +104,6 @@ including logs from the cron daemon.</p>
</code></pre></div> </code></pre></div>
<p>To see logs from e.g. the last hour, and only from the cron daemon:</p> <p>To see the logs from e.g. the last hour, and only from the cron daemon:</p>
<div class="bash highlight"><pre><span></span><code>journalctl --since <span class="s2">&quot;1 hour ago&quot;</span> -t CRON <div class="bash highlight"><pre><span></span><code>journalctl --since <span class="s2">&quot;1 hour ago&quot;</span> -t CRON
</code></pre></div> </code></pre></div>

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# Monitoring Cron Jobs # Monitoring Cron Jobs
SITE_NAME is perfectly suited for monitoring cron jobs. All you have to do is SITE_NAME is perfectly suited for monitoring cron jobs. All you have to do is
update your cron job command to send a HTTP request to SITE_NAME update your cron job command to send an HTTP request to SITE_NAME
after a job completes. after completing the job.
Let's look at an example: Let's look at an example:
@ -14,11 +14,11 @@ $ crontab -l
The above job runs `/home/user/backup.sh` every day at 6:08. The backup The above job runs `/home/user/backup.sh` every day at 6:08. The backup
script is presumably a headless, background process. Even if it works script is presumably a headless, background process. Even if it works
correctly currently, it can start silently failing in future, without correctly currently, it can start silently failing in the future without
anyone noticing. anyone noticing.
You can set up SITE_NAME to notify you whenever the backup script does not You can set up SITE_NAME to notify you whenever the backup script does not
run on time or does not complete successfully. Here are the steps to do that. run on time, or it does not complete successfully. Here are the steps to do that.
1. If you have not already, sign up for a free SITE_NAME account. 1. If you have not already, sign up for a free SITE_NAME account.
@ -44,8 +44,8 @@ $ crontab -e
8 6 * * * /home/user/backup.sh && curl -fsS --retry 5 -o /dev/null PING_URL 8 6 * * * /home/user/backup.sh && curl -fsS --retry 5 -o /dev/null PING_URL
``` ```
Now, each time your cron job runs, it will send a HTTP request to the ping URL. Now, each time your cron job runs, it will send an HTTP request to the ping URL.
Since SITE_NAME knows the schedule of your cron job, it can calculate Since SITE_NAME knows your cron job's schedule, it can calculate
the dates and times when the job should run. As soon as your cron job doesn't the dates and times when the job should run. As soon as your cron job doesn't
report at an expected time, SITE_NAME will send you a notification. report at an expected time, SITE_NAME will send you a notification.
@ -53,13 +53,13 @@ This monitoring technique takes care of various failure scenarios that could
potentially go unnoticed otherwise: potentially go unnoticed otherwise:
* The whole machine goes down (power outage, janitor stumbles on wires, VPS provider problems, etc.) * The whole machine goes down (power outage, janitor stumbles on wires, VPS provider problems, etc.)
* cron daemon is not running, or has invalid configuration * the cron daemon is not running or has an invalid configuration
* cron does start your task, but the task exits with non-zero exit code * cron does start your task, but the task exits with a non-zero exit code
## Curl Options ## Curl Options
The extra options in the above example tells curl to retry failed HTTP requests, and The extra options in the above example tell curl to retry failed HTTP requests, and
to silence output unless there is an error. Feel free to adjust the curl options to silence output unless there is an error. Feel free to adjust the curl options to
suit your needs. suit your needs.
**&amp;&amp;** **&amp;&amp;**
@ -86,8 +86,8 @@ suit your needs.
## Looking up Your Machine's Time Zone ## Looking up Your Machine's Time Zone
If your cron job consistently pings SITE_NAME an hour early or an hour late, If your cron job consistently pings SITE_NAME an hour early or an hour late,
the likely cause is a timezone mismatch: your machine may be using a different timezone the likely cause is a timezone mismatch: your machine may be using a timezone
than what is configured on SITE_NAME. different from what you have configured on SITE_NAME.
On modern GNU/Linux systems, you can look up the time zone using the On modern GNU/Linux systems, you can look up the time zone using the
`timedatectl status` command and looking for "Time zone" in its output: `timedatectl status` command and looking for "Time zone" in its output:
@ -115,7 +115,7 @@ To see live logs:
journalctl -f journalctl -f
``` ```
To see logs from e.g. the last hour, and only from the cron daemon: To see the logs from e.g. the last hour, and only from the cron daemon:
```bash ```bash
journalctl --since "1 hour ago" -t CRON journalctl --since "1 hour ago" -t CRON

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@ -1,5 +1,5 @@
<h1>PHP</h1> <h1>PHP</h1>
<p>Below is an example of making a HTTP request to SITE_NAME from PHP.</p> <p>Below is an example of making an HTTP request to SITE_NAME from PHP.</p>
<div class="php highlight"><pre><span></span><code><span class="nb">file_get_contents</span><span class="p">(</span><span class="s1">&#39;PING_URL&#39;</span><span class="p">);</span> <div class="php highlight"><pre><span></span><code><span class="nb">file_get_contents</span><span class="p">(</span><span class="s1">&#39;PING_URL&#39;</span><span class="p">);</span>
</code></pre></div> </code></pre></div>

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@ -1,6 +1,6 @@
# PHP # PHP
Below is an example of making a HTTP request to SITE_NAME from PHP. Below is an example of making an HTTP request to SITE_NAME from PHP.
```php ```php
file_get_contents('PING_URL'); file_get_contents('PING_URL');

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@ -1,16 +1,16 @@
<h1>PowerShell</h1> <h1>PowerShell</h1>
<p>You can use <a href="https://msdn.microsoft.com/en-us/powershell/mt173057.aspx">PowerShell</a> <p>You can use <a href="https://msdn.microsoft.com/en-us/powershell/mt173057.aspx">PowerShell</a>
and Windows Task Scheduler to automate various tasks on a Windows system. and Windows Task Scheduler to automate various tasks on a Windows system.
From within a PowerShell script it is also easy to ping SITE_NAME.</p> From within a PowerShell script, it is also easy to ping SITE_NAME.</p>
<p>Here is a simple PowerShell script that pings SITE_NAME. When scheduled to <p>Here is a simple PowerShell script that pings SITE_NAME. When scheduled to
run with Task Scheduler, it will essentially just send regular "I'm alive" messages. run with Task Scheduler, it will essentially just send regular "I'm alive" messages.
You can of course extend it to do more things.</p> Of course, you can extend it to do more things.</p>
<div class="powershell highlight"><pre><span></span><code><span class="c"># inside a PowerShell script:</span> <div class="powershell highlight"><pre><span></span><code><span class="c"># inside a PowerShell script:</span>
<span class="nb">Invoke-RestMethod</span> <span class="n">PING_URL</span> <span class="nb">Invoke-RestMethod</span> <span class="n">PING_URL</span>
</code></pre></div> </code></pre></div>
<p>Save the above to e.g. <code>C:\Scripts\healthchecks.ps1</code>. <p>Save the above to e.g., <code>C:\Scripts\healthchecks.ps1</code>.
Then use the following command in a Scheduled Task to run the script:</p> Then use the following command in a Scheduled Task to run the script:</p>
<div class="bat highlight"><pre><span></span><code>powershell.exe -ExecutionPolicy bypass -File C:\Scripts\healthchecks.ps1 <div class="bat highlight"><pre><span></span><code>powershell.exe -ExecutionPolicy bypass -File C:\Scripts\healthchecks.ps1
</code></pre></div> </code></pre></div>

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@ -2,18 +2,18 @@
You can use [PowerShell](https://msdn.microsoft.com/en-us/powershell/mt173057.aspx) You can use [PowerShell](https://msdn.microsoft.com/en-us/powershell/mt173057.aspx)
and Windows Task Scheduler to automate various tasks on a Windows system. and Windows Task Scheduler to automate various tasks on a Windows system.
From within a PowerShell script it is also easy to ping SITE_NAME. From within a PowerShell script, it is also easy to ping SITE_NAME.
Here is a simple PowerShell script that pings SITE_NAME. When scheduled to Here is a simple PowerShell script that pings SITE_NAME. When scheduled to
run with Task Scheduler, it will essentially just send regular "I'm alive" messages. run with Task Scheduler, it will essentially just send regular "I'm alive" messages.
You can of course extend it to do more things. Of course, you can extend it to do more things.
```powershell ```powershell
# inside a PowerShell script: # inside a PowerShell script:
Invoke-RestMethod PING_URL Invoke-RestMethod PING_URL
``` ```
Save the above to e.g. `C:\Scripts\healthchecks.ps1`. Save the above to e.g., `C:\Scripts\healthchecks.ps1`.
Then use the following command in a Scheduled Task to run the script: Then use the following command in a Scheduled Task to run the script:
```bat ```bat

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@ -5,7 +5,7 @@ your checks between them as your usage grows.</p>
<p><img alt="An overview of projects" src="IMG_URL/projects.png" /></p> <p><img alt="An overview of projects" src="IMG_URL/projects.png" /></p>
<p>Checks and integrations are project-scoped: each check and each configured <p>Checks and integrations are project-scoped: each check and each configured
integration always belongs to a particular project. Checks can be transferred integration always belongs to a particular project. Checks can be transferred
from one project to another, preserving check's ping address:</p> between projects. The transfer operation preserves check's ping address:</p>
<p><img alt="The transfer dialog" src="IMG_URL/transfer_check.png" /></p> <p><img alt="The transfer dialog" src="IMG_URL/transfer_check.png" /></p>
<h2>Team Access</h2> <h2>Team Access</h2>
<p>You can grant your colleagues access to a project by inviting them into <p>You can grant your colleagues access to a project by inviting them into
@ -47,17 +47,17 @@ limit depends on the account's billing plan. When you reach the Check Limit
you will not be able to create new checks.</p> you will not be able to create new checks.</p>
<p>All projects owned by your account shares your account's Check Limit. <p>All projects owned by your account shares your account's Check Limit.
For example, consider a Business account with two projects, For example, consider a Business account with two projects,
"Project A" and "Project B". If A has 70 checks, then B cannot have more than "Project A" and "Project B." If A has 70 checks, then B cannot have more than
30 checks, in order to not exceed the Business account's total limit of 100.</p> 30 checks in order to not exceed the Business account's total limit of 100.</p>
<p>However, only checks from your own projects count towards your account's <p>However, only checks from your own projects count towards your account's
quota. If you get invited to somebody else's project, that does not change quota. If you get invited to somebody else's project, that does not change
the number of checks you can create in your projects.</p> the number of checks you can create in your projects.</p>
<h2>Projects and Team Size Limits</h2> <h2>Projects and Team Size Limits</h2>
<p><strong>Team Size</strong> is the number of <em>unique</em> users you can invite in your projects. <p><strong>Team Size</strong> is the number of <em>unique</em> users you can invite to your projects.
Same as with Check Limit, all projects share your account's Team Size limit. Same as with Check Limit, all projects share your account's Team Size limit.
However, if you invite the same user (using the same email address) into multiple However, if you invite the same user (using the same email address) into multiple
projects, it only takes up a single seat.</p> projects, it only takes up a single seat.</p>
<h2>Projects and Monthly Reports</h2> <h2>Projects and Monthly Reports</h2>
<p>SITE_NAME sends monthly email reports at the start of each month. The monthly reports <p>SITE_NAME sends monthly email reports at the start of each month. The monthly reports
list a summary of checks from <strong>all your projects</strong>. It contains status summaries for list a summary of checks from <strong>all your projects</strong>. It contains status summaries for
both the projects you own, and the projects you are a member of.</p> both the projects you own and the projects you are a member of.</p>

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@ -8,7 +8,7 @@ your checks between them as your usage grows.
Checks and integrations are project-scoped: each check and each configured Checks and integrations are project-scoped: each check and each configured
integration always belongs to a particular project. Checks can be transferred integration always belongs to a particular project. Checks can be transferred
from one project to another, preserving check's ping address: between projects. The transfer operation preserves check's ping address:
![The transfer dialog](IMG_URL/transfer_check.png) ![The transfer dialog](IMG_URL/transfer_check.png)
@ -61,8 +61,8 @@ you will not be able to create new checks.
All projects owned by your account shares your account's Check Limit. All projects owned by your account shares your account's Check Limit.
For example, consider a Business account with two projects, For example, consider a Business account with two projects,
"Project A" and "Project B". If A has 70 checks, then B cannot have more than "Project A" and "Project B." If A has 70 checks, then B cannot have more than
30 checks, in order to not exceed the Business account's total limit of 100. 30 checks in order to not exceed the Business account's total limit of 100.
However, only checks from your own projects count towards your account's However, only checks from your own projects count towards your account's
quota. If you get invited to somebody else's project, that does not change quota. If you get invited to somebody else's project, that does not change
@ -70,7 +70,7 @@ the number of checks you can create in your projects.
## Projects and Team Size Limits ## Projects and Team Size Limits
**Team Size** is the number of *unique* users you can invite in your projects. **Team Size** is the number of *unique* users you can invite to your projects.
Same as with Check Limit, all projects share your account's Team Size limit. Same as with Check Limit, all projects share your account's Team Size limit.
However, if you invite the same user (using the same email address) into multiple However, if you invite the same user (using the same email address) into multiple
projects, it only takes up a single seat. projects, it only takes up a single seat.
@ -79,4 +79,4 @@ projects, it only takes up a single seat.
SITE_NAME sends monthly email reports at the start of each month. The monthly reports SITE_NAME sends monthly email reports at the start of each month. The monthly reports
list a summary of checks from **all your projects**. It contains status summaries for list a summary of checks from **all your projects**. It contains status summaries for
both the projects you own, and the projects you are a member of. both the projects you own and the projects you are a member of.

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@ -1,5 +1,6 @@
<h1>Python</h1> <h1>Python</h1>
<p>If you are already using the requests library, it is convenient to also use it here:</p> <p>If you are already using the <a href="https://requests.readthedocs.io/en/master/">requests</a>
library, it is convenient to also use it here:</p>
<div class="python highlight"><pre><span></span><code><span class="kn">import</span> <span class="nn">requests</span> <div class="python highlight"><pre><span></span><code><span class="kn">import</span> <span class="nn">requests</span>
<span class="k">try</span><span class="p">:</span> <span class="k">try</span><span class="p">:</span>
@ -10,7 +11,8 @@
</code></pre></div> </code></pre></div>
<p>Otherwise, you can use the urllib module from Python 3 standard library:</p> <p>Otherwise, you can use the <a href="https://docs.python.org/3/library/urllib.request.html">urllib.request</a>
module from Python 3 standard library:</p>
<div class="python highlight"><pre><span></span><code><span class="kn">import</span> <span class="nn">socket</span> <div class="python highlight"><pre><span></span><code><span class="kn">import</span> <span class="nn">socket</span>
<span class="kn">import</span> <span class="nn">urllib.request</span> <span class="kn">import</span> <span class="nn">urllib.request</span>

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@ -1,6 +1,7 @@
# Python # Python
If you are already using the requests library, it is convenient to also use it here: If you are already using the [requests](https://requests.readthedocs.io/en/master/)
library, it is convenient to also use it here:
```python ```python
import requests import requests
@ -12,7 +13,8 @@ except requests.RequestException as e:
print("Ping failed: %s" % e) print("Ping failed: %s" % e)
``` ```
Otherwise, you can use the urllib module from Python 3 standard library: Otherwise, you can use the [urllib.request](https://docs.python.org/3/library/urllib.request.html)
module from Python 3 standard library:
```python ```python
import socket import socket

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@ -1,17 +1,18 @@
<h1>Pinging Reliability Tips</h1> <h1>Pinging Reliability Tips</h1>
<p>Sending monitoring signals over public internet is inherently unreliable. <p>Sending monitoring signals over the public internet is inherently unreliable.
HTTP requests can sometimes take excessively long or fail completely HTTP requests can sometimes take excessively long or fail completely
for a variety of reasons. Here are some general tips to make your monitoring for a variety of reasons. Here are some general tips to make your monitoring
code more robust.</p> code more robust.</p>
<h2>Specify HTTP Request Timeout</h2> <h2>Specify HTTP Request Timeout</h2>
<p>Put a time limit on how long each ping is allowed to take. This is especially <p>Put a time limit on how long each ping is allowed to take. This is especially
important when sending a "start" signal at the start of a job: you don't want important when sending a "start" signal at the start of a job: you don't want
a stuck ping prevent the actual job from running. Another case is a continuously a stuck ping to prevent the actual job from running. Another case is a continuously
running worker process which pings SITE_NAME after each completed item. A stuck running worker process that pings SITE_NAME after each completed item. A stuck
request would block the whole process, so it is important to guard against.</p> request could block the whole process. An explicit per-request time limit mitigates
this problem.</p>
<p>Specifying the timeout depends on the tool you use. curl, for example, has the <p>Specifying the timeout depends on the tool you use. curl, for example, has the
<code>--max-time</code> (shorthand: <code>-m</code>) parameter:</p> <code>--max-time</code> (shorthand: <code>-m</code>) parameter:</p>
<div class="bash highlight"><pre><span></span><code><span class="c1"># Send a HTTP, 10 second timeout:</span> <div class="bash highlight"><pre><span></span><code><span class="c1"># Send an HTTP request, 10 second timeout:</span>
curl -m <span class="m">10</span> PING_URL curl -m <span class="m">10</span> PING_URL
</code></pre></div> </code></pre></div>
@ -28,5 +29,5 @@ curl --retry <span class="m">5</span> PING_URL
<h2>Handle Exceptions</h2> <h2>Handle Exceptions</h2>
<p>Make sure you know how your HTTP client handles failed requests. For example, <p>Make sure you know how your HTTP client handles failed requests. For example,
if you use a HTTP library which raises exceptions, decide if you want to if you use an HTTP library that raises exceptions, decide if you want to
catch the exceptions, or let them bubble up.</p> catch the exceptions or let them bubble up.</p>

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@ -1,6 +1,6 @@
# Pinging Reliability Tips # Pinging Reliability Tips
Sending monitoring signals over public internet is inherently unreliable. Sending monitoring signals over the public internet is inherently unreliable.
HTTP requests can sometimes take excessively long or fail completely HTTP requests can sometimes take excessively long or fail completely
for a variety of reasons. Here are some general tips to make your monitoring for a variety of reasons. Here are some general tips to make your monitoring
code more robust. code more robust.
@ -9,15 +9,16 @@ code more robust.
Put a time limit on how long each ping is allowed to take. This is especially Put a time limit on how long each ping is allowed to take. This is especially
important when sending a "start" signal at the start of a job: you don't want important when sending a "start" signal at the start of a job: you don't want
a stuck ping prevent the actual job from running. Another case is a continuously a stuck ping to prevent the actual job from running. Another case is a continuously
running worker process which pings SITE_NAME after each completed item. A stuck running worker process that pings SITE_NAME after each completed item. A stuck
request would block the whole process, so it is important to guard against. request could block the whole process. An explicit per-request time limit mitigates
this problem.
Specifying the timeout depends on the tool you use. curl, for example, has the Specifying the timeout depends on the tool you use. curl, for example, has the
`--max-time` (shorthand: `-m`) parameter: `--max-time` (shorthand: `-m`) parameter:
```bash ```bash
# Send a HTTP, 10 second timeout: # Send an HTTP request, 10 second timeout:
curl -m 10 PING_URL curl -m 10 PING_URL
``` ```
@ -37,5 +38,5 @@ curl --retry 5 PING_URL
## Handle Exceptions ## Handle Exceptions
Make sure you know how your HTTP client handles failed requests. For example, Make sure you know how your HTTP client handles failed requests. For example,
if you use a HTTP library which raises exceptions, decide if you want to if you use an HTTP library that raises exceptions, decide if you want to
catch the exceptions, or let them bubble up. catch the exceptions or let them bubble up.

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@ -1,5 +1,5 @@
<h1>Ruby</h1> <h1>Ruby</h1>
<p>Below is an example of making a HTTP request to SITE_NAME from Ruby.</p> <p>Below is an example of making an HTTP request to SITE_NAME from Ruby.</p>
<div class="ruby highlight"><pre><span></span><code><span class="nb">require</span> <span class="s1">&#39;net/http&#39;</span> <div class="ruby highlight"><pre><span></span><code><span class="nb">require</span> <span class="s1">&#39;net/http&#39;</span>
<span class="nb">require</span> <span class="s1">&#39;uri&#39;</span> <span class="nb">require</span> <span class="s1">&#39;uri&#39;</span>

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@ -1,6 +1,6 @@
# Ruby # Ruby
Below is an example of making a HTTP request to SITE_NAME from Ruby. Below is an example of making an HTTP request to SITE_NAME from Ruby.
```ruby ```ruby
require 'net/http' require 'net/http'

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@ -1,8 +1,8 @@
<h1>Signalling failures</h1> <h1>Signaling failures</h1>
<p>You can actively signal a failure to SITE_NAME by slightly changing the <p>You can actively signal a failure to SITE_NAME by slightly changing the
ping URL: append either <code>/fail</code> or <code>/{exit-status}</code> to your normal ping URL. ping URL: append either <code>/fail</code> or <code>/{exit-status}</code> to your normal ping URL.
The exit status should be a 0-255 integer. SITE_NAME will interpret The exit status should be a 0-255 integer. SITE_NAME will interpret
exit status 0 as success, and all non-zero values as failures.</p> exit status 0 as success and all non-zero values as failures.</p>
<p>Examples:</p> <p>Examples:</p>
<div class="bash highlight"><pre><span></span><code><span class="c1"># Reports failure by appending the /fail suffix:</span> <div class="bash highlight"><pre><span></span><code><span class="c1"># Reports failure by appending the /fail suffix:</span>
curl --retry <span class="m">3</span> PING_URL/fail curl --retry <span class="m">3</span> PING_URL/fail
@ -12,7 +12,7 @@ curl --retry <span class="m">3</span> PING_URL/1
</code></pre></div> </code></pre></div>
<p>By actively signalling failures to SITE_NAME, you can minimize the delay from your <p>By actively signaling failures to SITE_NAME, you can minimize the delay from your
monitored service encountering a problem to you getting notified about it.</p> monitored service encountering a problem to you getting notified about it.</p>
<h2>Shell Scripts</h2> <h2>Shell Scripts</h2>
<p>The below shell script appends <code>$?</code> (a special variable which contains the <p>The below shell script appends <code>$?</code> (a special variable which contains the

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@ -1,9 +1,9 @@
# Signalling failures # Signaling failures
You can actively signal a failure to SITE_NAME by slightly changing the You can actively signal a failure to SITE_NAME by slightly changing the
ping URL: append either `/fail` or `/{exit-status}` to your normal ping URL. ping URL: append either `/fail` or `/{exit-status}` to your normal ping URL.
The exit status should be a 0-255 integer. SITE_NAME will interpret The exit status should be a 0-255 integer. SITE_NAME will interpret
exit status 0 as success, and all non-zero values as failures. exit status 0 as success and all non-zero values as failures.
Examples: Examples:
@ -16,7 +16,7 @@ curl --retry 3 PING_URL/fail
curl --retry 3 PING_URL/1 curl --retry 3 PING_URL/1
``` ```
By actively signalling failures to SITE_NAME, you can minimize the delay from your By actively signaling failures to SITE_NAME, you can minimize the delay from your
monitored service encountering a problem to you getting notified about it. monitored service encountering a problem to you getting notified about it.
## Shell Scripts ## Shell Scripts

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@ -204,7 +204,7 @@
class="icon" alt="Webhook icon" /> class="icon" alt="Webhook icon" />
<h2>Webhook</h2> <h2>Webhook</h2>
<p>Receive a HTTP callback when a check goes down.</p> <p>Receive an HTTP callback when a check goes down.</p>
<a href="{% url 'hc-add-webhook' project.code %}" class="btn btn-primary">Add Integration</a> <a href="{% url 'hc-add-webhook' project.code %}" class="btn btn-primary">Add Integration</a>
</li> </li>

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@ -37,7 +37,7 @@
</div> </div>
<div class="panel-body"> <div class="panel-body">
<p>A cron expression has five fields, separated by spaces. <p>A cron expression has five fields, separated by spaces.
Asterisk is a wild card character and means "any value". Asterisk is a wild card character and means "any value."
</p> </p>
<div class="desc">"Run every minute"</div> <div class="desc">"Run every minute"</div>
@ -98,7 +98,7 @@
</div> </div>
<div class="panel-body"> <div class="panel-body">
<p>Use numeric values instead of asterisks to match specific <p>Use numeric values instead of asterisks to match specific
minutes, hours, days and months. minutes, hours, days, and months.
</p> </p>
<div class="desc">"Run at 6PM on Fridays"</div> <div class="desc">"Run at 6PM on Fridays"</div>
@ -160,7 +160,7 @@
<div class="panel-body"> <div class="panel-body">
<p>Use <code>{v1},{v2},...,{vn}</code> to list multiple values.</p> <p>Use <code>{v1},{v2},...,{vn}</code> to list multiple values.</p>
<div class="desc">"Run at 9AM, 12PM and 6PM every day"</div> <div class="desc">"Run at 9AM, 12PM, and 6PM every day"</div>
<table class="cron-example"> <table class="cron-example">
<tr> <tr>
@ -245,7 +245,7 @@
<td> <td>
<div class="guide"></div> <div class="guide"></div>
</td> </td>
<td>Run on Monday to Friday</td> <td>Run from Monday to Friday</td>
</tr> </tr>
<tr> <tr>
<td colspan="2" class="minor"> <td colspan="2" class="minor">
@ -336,7 +336,7 @@
<h3 class="panel-title">Combine numeric values and ranges in lists</h3> <h3 class="panel-title">Combine numeric values and ranges in lists</h3>
</div> </div>
<div class="panel-body"> <div class="panel-body">
<p>In the comma-separated lists you can combine not only <p>In the comma-separated lists, you can combine not only
numeric values but also ranges.</p> numeric values but also ranges.</p>
<div class="desc">"Run every round hour outside office hours"</div> <div class="desc">"Run every round hour outside office hours"</div>
@ -459,13 +459,13 @@
</div> </div>
<div class="panel-body"> <div class="panel-body">
<p> <p>
Cron daemon uses server's <strong>local time</strong>. The cron daemon uses the server's <strong>local time</strong>.
If your server's timezone is other than UTC, make sure If your server's timezone is other than UTC, make sure
to set a matching timezone for your check to set a matching timezone for your check
on {{ site_name }} as well. on {{ site_name }} as well.
</p> </p>
<p>On Ubuntu systems you can check the server's timezone <p>On Ubuntu systems, you can check the server's timezone
with:</p> with:</p>
<pre>cat /etc/timezone</pre> <pre>cat /etc/timezone</pre>
</div> </div>