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<h1 class="entry-title" itemprop="headline" ><a href="https://sreweekly.com/sre-weekly-issue-223/">SRE Weekly Issue #223</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-223/">June 14, 2020</a>
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<a href="https://sreweekly.com/sre-weekly-issue-223/" title="Permalink to SRE Weekly Issue #223" 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>DevSecCon24 starts tonight at 10pm ET and runs for 24 hours. Tune in for great talks on building and deploying secure, resiliant software. Grab free tickets at the link here, and visit StackHawk&#8217;s virtual booth to get a T Shirt.<br />
<a href="https://www.eventbrite.com/e/devseccon24-virtual-conference-tickets-94550734793?discount=StackHawk20">https://www.eventbrite.com/e/devseccon24-virtual-conference-tickets-94550734793?discount=StackHawk20</a></p>
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<h2>Articles</h2>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.fastly.com/blog/prevent-application-network-instability-serve-stale-content" target="_blank">Prevent application and network instability by serving stale content</a></div>
<div class="sreweekly-description">
<p>I&#8217;ve used this technique in the past with a single-page app and a highly-cacheable API, to ensure stability even when the backend goes down.</p>
<p><small>Patrick Hamann</small></p>
<p><small><em>Full disclosure: Fastly is my employer.</em></small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://scotthelme.co.uk/impending-doom-root-ca-expiring-legacy-clients/" target="_blank">The Impending Doom of Expiring Root CAs and Legacy Clients</a></div>
<div class="sreweekly-description">
<p>Here&#8217;s a deep dive into how your CA&#8217;s certificate can affect your application&#8217;s reliability — at least in the eyes of your customers.</p>
<p><small>Scott Helme</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://blog.coinbase.com/incident-post-mortem-june-1-2020-1cff2e51fa64" target="_blank">[Coinbase] Incident Post Mortem: June 1, 2020</a></div>
<div class="sreweekly-description">
<p>Here&#8217;s Coinbase&#8217;s followup from their outage last week.</p>
<p><small>Michael de Hoog — Coinbase</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://surfingcomplexity.blog/2020/06/13/whos-afraid-of-serializability/" target="_blank">Who’s afraid of serializability?</a></div>
<div class="sreweekly-description">
<blockquote><p>Kyle Kingsbury recently did an analysis of PostgreSQL 12.3 and found that under certain conditions it violated guarantees it makes about transactions, including violations of the serializability transaction isolation level.</p>
<p>I thought it would be fun to use one of his counterexamples to illustrate what serializable means.</p></blockquote>
<p><small>Lorin Hochstein</small></p>
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<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.gremlin.com//blog/achieving-fmea-goals-faster-with-chaos-engineering/" target="_blank">Achieving FMEA goals faster with Chaos Engineering</a></div>
<div class="sreweekly-description">
<blockquote><p>Failure mode and effects analysis (FMEA) is a decades-old method for identifying all possible failures in a design, a manufacturing or assembly process, or a product or service.</p></blockquote>
<p>If you&#8217;ve been tasked with applying FMEA in your SRE work, this article will get you started.</p>
<p><small>Matthew Helmke</small></p>
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<h2>Outages</h2>
<ul class="sreweekly-outages">
<li><a href="https://techcrunch.com/2020/06/09/ibm-cloud-suffers-prolonged-outage/">IBM Softlayer</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">This is the big one this week, with downstream effects on lots of sites and services hosted in Softlayer.
<p>There&#8217;s a <a href="https://cloud.ibm.com/status?selected=announcement">bit of detail from IBM</a> that seems to indicate that a BGP error by a third party flooded IBM with misrouted traffic.</li>
</ul>
</li>
<li><a href="https://reddit.statuspage.io/incidents/y3zj6vp41m1f">Reddit</a></li>
<li><a href="https://status.squarespace.com/incidents/smtsd1khg9l4">Squarespace</a></li>
<li><a href="https://twitter.com/snapchatsupport/status/1270479837484859393">Snapchat</a></li>
<li><a href="https://twitter.com/MSFT365Status/status/1271088190540124166">Microsoft Teams</a></li>
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