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<h1 class="entry-title" itemprop="headline" ><a href="https://sreweekly.com/sre-weekly-issue-253/">SRE Weekly Issue #253</a></h1>
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<div class="entry-date" itemprop="datePublished" >
<i class="genericon genericon-day"></i><a class="updated" href="https://sreweekly.com/sre-weekly-issue-253/">January 17, 2021</a>
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<a href="https://sreweekly.com/sre-weekly-issue-253/" title="Permalink to SRE Weekly Issue #253" class="email_only">View on sreweekly.com</a>
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<h2 style="text-align: center; font-size: 80%; color: #909090;">A message from our sponsor, StackHawk:</h2>
<p>How do you know if your GraphQL API is secure? Watch StackHawk CSO Scott Gerlach walk through how to run application security tests for GraphQL-backed apps.<br />
<a href="http://sthwk.com/graphql-webinar">http://sthwk.com/graphql-webinar</a></p>
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<h2>Articles</h2>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.algolia.com/blog/may-30-ssl-incident/" target="_blank">May 30 SSL incident</a></div>
<div class="sreweekly-description">
<p>TLS can be such a headache.</p>
<blockquote><p>This was an interesting situation. There was a valid path to the USERTrust RSA Certification Authority, and there was also an expired path. The browser was able to find the valid chain, but the curl was not able to find it.</p></blockquote>
<p><small>Adam Surak — Algolia</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.infoq.com/articles/series-enhancing-resilience-2/" target="_blank">Shifting Modes: Creating a Program to Support Sustained Resilience </a></div>
<div class="sreweekly-description">
<p>A well-researched article on shifting emphasis from incident prevention to learning and resilience.</p>
<blockquote><p>Incidents cannot be prevented, because incidents are the inevitable result of success.</p></blockquote>
<p><small>Alex Elman</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://surfingcomplexity.blog/2021/01/10/error-budgets-and-the-legacy-of-herbert-heinrich/" target="_blank">Error budgets and the legacy of Herbert Heinrich</a></div>
<div class="sreweekly-description">
<p>This one&#8217;s worth reading through twice to let it sink in. It puts me in mind of <a href="https://willgallego.com/2019/02/23/resilience-engineering-and-error-budgets/">this article by WIll Gallego</a>, which is another thoughtful critique of error budgets.</p>
<blockquote><p>Here are the claims I’m going to make:</p>
<ol>
<li>Large incidents are much more costly to organizations than small ones, so we should work to reduce the risk of large incidents.</li>
<li>Error budgets don’t help reduce risk of large incidents.</li>
</ol>
</blockquote>
<p><small>Lorin Hochstein</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.unixdaemon.net/sysadmin/97-things-every-sre-01/" target="_blank">97 things every SRE should know &#8211; Part 01</a></div>
<div class="sreweekly-description">
<p>This is a review of a few of the chapters of the book of the same title by Emil Stolarsky and Jaime Woo.</p>
<p>Have you read it too? I&#8217;d love to read your take on it!</p>
<p><small>Dean Wilson</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.adaptivecapacitylabs.com/blog/2021/01/11/understanding-incidents-three-analytical-traps/" target="_blank">Understanding Incidents: Three Analytical Traps</a></div>
<div class="sreweekly-description">
<p>This one&#8217;s worth reading the next time need to do an incident retrospective. The traps are:</p>
<blockquote>
<ol>
<li>Counterfactual reasoning</li>
<li>Normative language</li>
<li>Mechanistic reasoning</li>
</ol>
</blockquote>
<p><small>John Allspaw — Adaptive Capacity Labs</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.blameless.com/blog/the-most-underappreciated-skill-for-sres" target="_blank">This Is the Most Underappreciated Skill for SREs</a></div>
<div class="sreweekly-description">
<p>The skill in question is <em>glue work</em>, and I sure appreciate a good gluer when I see one.</p>
<p><small>Emily Arnott — Blameless</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.pagerduty.com/blog/building-scaling-sre-team/" target="_blank">Building and Scaling Your SRE Team</a></div>
<div class="sreweekly-description">
<p>This one starts out by defining SRE, then goes into how to define your team and fill it with people.</p>
<p><small>Julie Gunderson — PagerDuty</small></p>
</div>
</div>
<h2>Outages</h2>
<ul class="sreweekly-outages">
<li><a href="https://status.fastly.com/incidents/1rbr326kjsmt">Fastly</a>
<ul>
<li><em><small>Fastly is my employer.</small></em></li>
</ul>
</li>
<li><a href="https://status.slack.com//2021-01/e8d2a136e0850d16">Slack</a></li>
<li><a href="https://themarketherald.com.au/tyro-asxtyr-updates-market-on-week-long-outage-2021-01-13/">Tyro Payments</a></li>
<li><a href="https://www.theverge.com/2021/1/15/22232993/signal-outage-new-users-messages-not-sending">Signal</a></li>
<li><a href="https://gadgets-africa.com/2021/01/11/kenic-ke-sites-go-down/">.ke TLD (Kenya)</a></li>
<li><a href="https://www.express.co.uk/life-style/science-technology/1383089/Microsoft-Teams-Office-365-OneDrive-SharePoint-outage-status-latest">Microsoft Teams, Office 365 and OneDrive</a></li>
<li><a href="https://www.dailymail.co.uk/sciencetech/article-9144877/Instagram-Worldwide-outage-leaves-thousands-unable-access-desktop-site-app.html">Instagram</a></li>
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