2069 lines
45 KiB
HTML
2069 lines
45 KiB
HTML
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<link rel="canonical" href="https://linkedin.github.io/school-of-sre/level101/metrics_and_monitoring/alerts/">
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School Of SRE
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Proactive Monitoring with Alerts
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Level 101
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Level 101
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Fundamentals Series
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Fundamentals Series
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Linux Basics
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Introduction
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Command Line Basics
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Server Administration
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Conclusion
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Git
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Git Basics
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Working With Branches
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Github and Hooks
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<a href="../../git/conclusion/" class="md-nav__link">
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Conclusion
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</ul>
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</nav>
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Linux Networking
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Linux Networking
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<a href="../../linux_networking/intro/" class="md-nav__link">
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Introduction
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</a>
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<li class="md-nav__item">
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<a href="../../linux_networking/dns/" class="md-nav__link">
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DNS
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</a>
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<li class="md-nav__item">
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<a href="../../linux_networking/udp/" class="md-nav__link">
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UDP
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../../linux_networking/http/" class="md-nav__link">
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HTTP
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</a>
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<li class="md-nav__item">
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<a href="../../linux_networking/tcp/" class="md-nav__link">
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TCP
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</a>
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<li class="md-nav__item">
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<a href="../../linux_networking/ipr/" class="md-nav__link">
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Routing
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</a>
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<li class="md-nav__item">
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<a href="../../linux_networking/conclusion/" class="md-nav__link">
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Conclusion
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</a>
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</ul>
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</nav>
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</ul>
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</nav>
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Python and Web
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Python and Web
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<a href="../../python_web/intro/" class="md-nav__link">
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Introduction
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</a>
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<li class="md-nav__item">
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<a href="../../python_web/python-concepts/" class="md-nav__link">
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Some Python Concepts
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<li class="md-nav__item">
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<a href="../../python_web/python-web-flask/" class="md-nav__link">
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Python, Web and Flask
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</a>
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<li class="md-nav__item">
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<a href="../../python_web/url-shorten-app/" class="md-nav__link">
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The URL Shortening App
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</a>
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<li class="md-nav__item">
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<a href="../../python_web/sre-conclusion/" class="md-nav__link">
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Conclusion
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</ul>
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</nav>
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Data
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Data
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Third-party Monitoring
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Best Practices for Monitoring
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Writing Secure code
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Introduction
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Package Management
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Storage Media
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<li class="md-nav__item">
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<a href="../../../level102/linux_intermediate/archiving_backup/" class="md-nav__link">
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Archiving and Backup
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<h2 id="_1"></h2>
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<h1 id="proactive-monitoring-using-alerts">Proactive monitoring using alerts</h1>
|
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<p>Earlier we discussed different ways to collect key metric data points
|
|
from a service and its underlying infrastructure. This data gives us a
|
|
better understanding of how the service is performing. One of the main
|
|
objectives of monitoring is to detect any service degradations early
|
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(reduce Mean Time To Detect) and notify stakeholders so that the issues
|
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are either avoided or can be fixed early, thus reducing Mean Time To
|
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Recover (MTTR). For example, if you are notified when resource usage by
|
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a service exceeds 90 percent, you can take preventive measures to avoid
|
|
any service breakdown due to a shortage of resources. On the other hand,
|
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when a service goes down due to an issue, early detection and
|
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notification of such incidents can help you quickly fix the issue.</p>
|
|
<p><img alt="An alert notification received on Slack" src="../images/image11.png" /> </p>
|
|
<p align="center"> Figure 8: An alert notification received on Slack </p>
|
|
|
|
<p>Today most of the monitoring services available provide a mechanism to
|
|
set up alerts on one or a combination of metrics to actively monitor the
|
|
service health. These alerts have a set of defined rules or conditions,
|
|
and when the rule is broken, you are notified. These rules can be as
|
|
simple as notifying when the metric value exceeds n to as complex as a
|
|
week over week (WoW) comparison of standard deviation over a period of
|
|
time. Monitoring tools notify you about an active alert, and most of
|
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these tools support instant messaging (IM) platforms, SMS, email, or
|
|
phone calls. Figure 8 shows a sample alert notification received on
|
|
Slack for memory usage exceeding 90 percent of total RAM space on the
|
|
host.</p>
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