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69 lines
4.5 KiB
69 lines
4.5 KiB
<h1>Configuring Checks</h1>
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<p>In SITE_NAME, a <strong>Check</strong> represents a single service you want to
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monitor. For example, when monitoring cron jobs, you would create a separate check for
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each cron job to be monitored. SITE_NAME pricing plans are structured primarily
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around how many checks you can have in your account. You can create checks
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either in SITE_NAME web interface or by calling <a href="../api/">Management API</a>.</p>
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<h2>Name, Tags, Description</h2>
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<p>Describe each check using an optional name, tags, and description fields.</p>
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<p><img alt="Editing name, tags and description" src="IMG_URL/edit_name.png" /></p>
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<ul>
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<li><strong>Name</strong>: names are optional, but it is a good idea to set them.
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Good naming becomes especially important as you add more checks to the
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account. SITE_NAME will display check names in the web interface, in email reports,
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and notifications.</li>
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<li><strong>Tags</strong>: a space-separated list of optional labels. Use tags to organize and group
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checks within a project. You can tag checks by the environment
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(<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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any other system.</li>
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<li><strong>Description</strong>: a free-form text field with any related information for your team
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or your future self. Describe the cron job's role, who set it up, what to do in
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case of failures, where to look for additional information.</li>
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</ul>
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<h2>Simple Schedules</h2>
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<p>SITE_NAME supports two types of schedules: <strong>Simple</strong> and <strong>Cron</strong>. Use Simple
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schedules for monitoring processes that you expect to run at relatively regular time
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intervals: once an hour, once a day, once a week.</p>
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<p><img alt="Editing the period and grace time" src="IMG_URL/edit_simple_schedule.png" /></p>
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<p>For the simple schedules, you can configure two parameters, Period and Grace Time.</p>
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<ul>
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<li><strong>Period</strong> is the expected time between pings.</li>
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<li><strong>Grace Time</strong> is the additional time to wait before sending an alert when a check
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is late. Use this parameter to account for small, expected deviations in job
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execution times.</li>
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</ul>
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<h2>Cron Schedules</h2>
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<p>Use "cron" for monitoring processes with more complex schedules. This monitoring mode
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ensures that jobs run <strong>at the correct time</strong>, and not just at correct time intervals.</p>
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<p><img alt="Editing cron schedule" src="IMG_URL/edit_cron_schedule.png" /></p>
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<p>You will need to specify Cron Expression, Server's Time Zone, and Grace Time.</p>
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<ul>
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<li><strong>Cron Expression</strong> is the cron expression you specified in the crontab.</li>
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<li><strong>Server's Time Zone</strong> is the timezone of your server. The cron daemon typically uses
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system's local time. If the machine is not using the UTC timezone, you need to
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specify it here.</li>
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<li><strong>Grace Time</strong>, same as for simple schedules, is how long to wait before sending an
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alert for a late check.</li>
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</ul>
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<h2>Filtering Rules</h2>
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<p>In the "Filtering Rules" dialog, you can control several advanced aspects of
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how SITE_NAME handles incoming pings for a particular check.</p>
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<p><img alt="Setting filtering rules" src="IMG_URL/filtering_rules.png" /></p>
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<ul>
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<li><strong>Allowed request methods for HTTP requests</strong>. You can require the ping
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requests to use HTTP POST. Use the "Only POST" option if you run into issues of
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preview bots hitting the ping URLs when you send them in email or post them in chat.</li>
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<li><strong>Filter by keywords in the Subject line</strong>. When pinging <a href="../email/">via email</a>,
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look for specific keywords in the subject line. If the subject line contains any of
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the keywords listed in <strong>Success Keywords</strong>, SITE_NAME will assume it to be a success
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signal. Likewise, if it contains any of the keywords listed in <strong>Failure Keywords</strong>,
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SITE_NAME will treat it as an explicit failure signal.
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For example, this is useful if your backup software sends an email after each backup
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run with a different subject line depending on success or failure.</li>
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<li><strong>Pinging a Paused Check</strong>. Normally, when you ping a paused check, it leaves the
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paused state and goes into the "up" state (or the "down" state
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in case of <a href="../signaling_failures/">a failure signal</a>).
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You can change this behavior by selecting the "Ignore the ping, stay in
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the paused state" option. With this option selected, the paused state becomes "sticky":
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SITE_NAME will ignore all incoming pings until you explicitly <em>resume</em> the check.</li>
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</ul>
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