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<h1 class="entry-title" itemprop="headline" ><a href="https://sreweekly.com/sre-weekly-issue-36/">SRE Weekly Issue #36</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-36/">August 21, 2016</a>
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<a href="https://sreweekly.com/sre-weekly-issue-36/" title="Permalink to SRE Weekly Issue #36" class="email_only">View on sreweekly.com</a>
<p>Last week&#8217;s <a href="http://pages.catchpoint.com/DEVOPS-SRE-AMA-Registration.html">DevOps &#038; SRE AMA</a> was super fun! Thanks to the panelists for participating. Recordings should be posted soon.</p>
<div class="sreweekly-sponsor-message" style="border: 1px solid #b0b0b0;margin-top: 2rem;margin-bottom: 2rem;margin-left: auto;margin-right: auto;padding-left: 1rem;padding-right: 1rem;width: 80%;align: center;">
<h2 style="text-align: center;font-size: 55%;color: #b0b0b0;">SPONSOR MESSAGE</h2>
<p>Frustrated by the lack of tools available to automate incident response? Learn how ChatOps can help manage your operations through group chat in the latest book from O’Reilly. Get your copy here: <a href="http://try.victorops.com/l/44432/2016-08-19/f2xt33">http://try.victorops.com/l/44432/2016-08-19/f2xt33</a>
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<h2>Articles</h2>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://blog.serverdensity.com/multi-data-center-redundancy-sysadmin-considerations/" target="_blank">Multi data center redundancy – sysadmin considerations</a></div>
<div class="sreweekly-description">
<p>This is the second half of Server Density&#8217;s series on the lessons they learned as they transitioned to a multi-datacenter architecture. There are lots of interesting tidbits in here, such as an explanation of how they handle failover to the secondary DC and what they do if that goes wrong.</p>
<p><small><em>Full disclosure: Heroku, my employer, is mentioned.</em></small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://medium.com/production-ready/how-complex-web-systems-fail-part-2-1b1afb4fa7be#.d0un51ndx" target="_blank">How Complex Web Systems Fail </a></div>
<div class="sreweekly-description">
<p>Here&#8217;s the second half of Mathias Lafeldt&#8217;s series that seeks to apply Richard Cook&#8217;s <I>How Complex Systems Fail</i> to web systems. The article is great, but the really awesome part is the thoughtful responses by Cook himself to both parts one and two, linked at the end of this article.</p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.reddit.com/r/announcements/comments/4y0m56/why_reddit_was_down_on_aug_11/" target="_blank">Why Reddit was down on Aug 11</a></div>
<div class="sreweekly-description">
<p>Here&#8217;s a postmortem for last week&#8217;s outage that involved a migration gone awry. </p>
<p><small><em>Thanks to Jonathan Rudenberg for this one.</em></small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="http://www.theregister.co.uk/2016/08/18/uspto_sued_for_early_xmas/" target="_blank">US Patent Office sued after it declared a power outage a &#8216;national holiday&#8217;</a></div>
<div class="sreweekly-description">
<p>A patent holding firm is alleging that the USPTO overstepped its authority in declaring a system outage (reported in <a href="">issue #4</a>) to be treated as a national holiday for purposes of deadlines, and that this led to the plaintiff being sued. </p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://victorops.com/blog/burnout-monitorama/" target="_blank">Know Anyone With This High-Burnout Job?</a></div>
<div class="sreweekly-description">
<p>Burnout is a crucially important consideration in a field with on-call work. VictorOps has a few tips for alleviating burnout gleaned from this year&#8217;s Monitorama.</p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://dzone.com/articles/staging-servers-are-dead" target="_blank">Staging Servers Are Dead!</a></div>
<div class="sreweekly-description">
<p>Edith Harbaugh says that staging servers present a reliability risk that doesn&#8217;t outweigh their benefit. This article is an update to her <a href="http://readwrite.com/2016/01/22/staging-servers/">original article</a>, which I also recommend reading.</p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="http://githubengineering.com/context-aware-mysql-pools-via-haproxy/" target="_blank">Context aware MySQL pools via HAProxy</a></div>
<div class="sreweekly-description">
<p>Github uses HAProxy to balance across is read-only MySQL replicas, which is a common method. Their technique for excluding lagging nodes while avoiding entirely emptying the pool if all nodes are lagging is pretty neat.</p>
<p><small><em>Thanks to Devops Weekly for this one.</em></small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="http://martinfowler.com/articles/serverless.html" target="_blank">Serverless Architectures</a></div>
<div class="sreweekly-description">
<p>A highly detailed deep-dive on Serverless &#8212; what it means, benefits, and drawbacks. I especially enjoyed the #NoOps section: </p>
<blockquote><p>[Ops] also means at least monitoring, deployment, security, networking and often also means some amount of production debugging and system scaling. These problems all still exist with Serverless apps and you’re still going to need a strategy to deal with them. In some ways Ops is harder in a Serverless world because a lot of this is so new.</p></blockquote>
<p> #ServerlessIsMadeOfServers</p>
<p><small><em>Full disclosure: Heroku, my employer, is mentioned.</em></small></p>
</div>
</div>
<h2>Outages</h2>
<ul class="sreweekly-outages">
<li><a href="https://status.slack.com/2016-08/42ad7156695998fc">Slack</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">
<p>A relatively minor issue, but it impacted me, so I logged it here while awaiting resolution.</p>
</ul>
<li><a href="https://www.techcentral.co.za/gremlins-again-hit-mtn-network/67764/">MTN (mobile telecom)</a>
<li><a href="http://status.cloud.google.com/incident/cloud-dataflow/16001#5668600916475904">Google Cloud Status Dashboard</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">
<p>Postmortem included, with an interesting cause:</p>
<blockquote><p>During mitigation of a lower impact performance issue, Google engineers made a configuration change to pipeline orchestration. An error in this configuration caused validation within the orchestration component to reject all requests.</p></blockquote>
</ul>
<li><a href="http://www.datacenterdynamics.com/content-tracks/core-edge/mobile-network-outage-shuts-down-tesla-connectivity/96792.fullarticle">Tesla Vehicles</a>
<li><a href="http://www.dailystar.co.uk/tech/gaming/538685/Xbox-Live-down-Xbox-One-not-working-Xbox-status-Microsoft-Core-services-signing-in">Xbox Live</a>
<li><a href="http://www.cbronline.com/news/telecoms/network/sky-broadband-customers-hit-by-outage-for-second-time-this-month-4981418">Sky (ISP)</a>
<li><a href="https://www.rt.com/news/356184-facebook-down-users-say/">Facebook</a>
<li><a href="http://www.telegraph.co.uk/technology/2016/08/16/app-store-goes-down-leaving-iphone-users-unable-to-download-new/">Apple&#8217;s App Store</a>
<li><a href="http://indianexpress.com/article/technology/social/twitter-was-down-worldwide-for-a-few-hours-2978068/">Twitter</a>
<li><a href="http://www.m2mcafe.com/news/cisco-jasper-iot-network-faces-outage-in-us-3021.html">Cisco Jasper</a>
<li><a href="http://www.smh.com.au/sport/soccer/optus-out-epl-fans-rage-after-football-streaming-service-hits-technical-faults-20160814-gqsen8.html">Optus</a>
<li><a href="http://www.bizjournals.com/dayton/news/2016/08/13/att-hit-by-massive-wireless-network-outage.html">AT&#038;T</a>
<li><a href="http://www.scmagazine.com/nsa-blames-storm-for-website-outage/article/516909/">NSA</a>
</ul>
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