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<header class="entry-header cf">
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<h1 class="entry-title" itemprop="headline" ><a href="https://sreweekly.com/sre-weekly-issue-40/">SRE Weekly Issue #40</a></h1>
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<i class="genericon genericon-day"></i><a class="updated" href="https://sreweekly.com/sre-weekly-issue-40/">September 18, 2016</a>
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<a href="https://sreweekly.com/sre-weekly-issue-40/" title="Permalink to SRE Weekly Issue #40" class="email_only">View on sreweekly.com</a>
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<h2 style="text-align: center; font-size: 55%; color: #b0b0b0;">SPONSOR MESSAGE</h2>
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<p>Take a bite out of all things DevOps with video series, DevChops. Get easy to digest explanations of most-used DevOps terms and concepts in 90 seconds or less. Watch now: <a href="http://try.victorops.com/l/44432/2016-09-16/f7gpzp">http://try.victorops.com/l/44432/2016-09-16/f7gpzp</a></p>
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<h2>Articles</h2>
|
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<div class="sreweekly-entry">
|
||
<div class="sreweekly-title"><a href="https://blog.acolyer.org/2016/09/12/on-designing-and-deploying-internet-scale-services/" target="_blank">On designing and deploying internet-scale services</a></div>
|
||
<div class="sreweekly-description">
|
||
<p>Adrian Colyer summarizes James Hamilton’s 2007 paper in this edition of <i>The Morning Paper</i>. There’s a lot of excellent advice here — some I knew explicitly, some I mostly implement without thinking about it, and some I’d never thought about. The paper is great, but even if you don’t have time to read it, Colyer’s digest version is well worth a browse.</p>
|
||
</div>
|
||
</div>
|
||
<div class="sreweekly-entry">
|
||
<div class="sreweekly-title"><a href="http://www.susanjfowler.com/blog/2016/8/24/embracing-failure" target="_blank">Embracing Failure</a></div>
|
||
<div class="sreweekly-description">
|
||
<p>Susan Fowler (featured here a couple weeks ago) has a philosophy of failure in her life that I find really appealing as an SRE:</p>
|
||
<blockquote><p>We can learn something about how to become the best versions of ourselves from how we engineer the best complex systems in the world of software engineering.</p></blockquote>
|
||
</div>
|
||
</div>
|
||
<div class="sreweekly-entry">
|
||
<div class="sreweekly-title"><a href="http://www.susanjfowler.com/blog/2016/9/17/my-ebook-is-available-for-free-download" target="_blank">Second Chapter of <i>Production-Ready Microservices</i> by Susan Fowler</a></div>
|
||
<div class="sreweekly-description">
|
||
<p>And while we’re on the subject of Susan Fowler, she’s got a book coming soon about writing reliable microservices. In the linked ebook-version of the second chapter, she goes over the requirements for a production-ready microservice: stability, reliability, scalability, fault-tolerance, catastrophe-preparedness, performance, monitoring, and documentation.</p>
|
||
</div>
|
||
</div>
|
||
<div class="sreweekly-entry">
|
||
<div class="sreweekly-title"><a href="https://engineering.pinterest.com/blog/sharding-pinterest-how-we-scaled-our-mysql-fleet" target="_blank">Sharding Pinterest: How we scaled our MySQL fleet</a></div>
|
||
<div class="sreweekly-description">
|
||
<p>Pinterest explains how they broke their datastore up into 4096(!) shards on 4 pairs of MySQL servers (later 8192 on 8 pairs). It’s an interesting approach, although in essence it treats MySQL as a glorified key-value store for JSON documents.</p>
|
||
</div>
|
||
</div>
|
||
<div class="sreweekly-entry">
|
||
<div class="sreweekly-title"><a href="https://code.facebook.com/posts/365787980419535/scalable-and-secure-access-with-ssh/" target="_blank">Scalable and secure access with SSH</a></div>
|
||
<div class="sreweekly-description">
|
||
<p>Do you use Kerberos or similar to authenticate your SSH users? What happens if there’s an incident that’s bad enough to take down your auth infrastructure? I hadn’t realized that openSSH supports CAs, but Facebook shows us that PKI support is easy and feature-rich.</p>
|
||
</div>
|
||
</div>
|
||
<div class="sreweekly-entry">
|
||
<div class="sreweekly-title"><a href="https://code.facebook.com/posts/1734309626831603/dhcplb-an-open-source-load-balancer/" target="_blank">DHCPLB: An open source load balancer</a></div>
|
||
<div class="sreweekly-description">
|
||
<p>Another project from Facebook: a load balancer for DHCP. Facebook found that anycast was not distributing requests evenly across DHCP servers, so they wrote a loadbalancer in Go.</p>
|
||
</div>
|
||
</div>
|
||
<div class="sreweekly-entry">
|
||
<div class="sreweekly-title"><a href="http://preaccidentpodcast.podbean.com/e/safety-moment-fundamental-attribution-error/" target="_blank">Safety Moment – Fundamental Attribution Error</a></div>
|
||
<div class="sreweekly-description">
|
||
<p>In incident post-analysis, a fundamental attribution error is a tendency to see flaws in others as a cause if they were involved in an incident, but to blame the system if we were the one involved. This 4-minute segment from the Pre-Accident Podcast explains fundamental attribution error in more detail.</p>
|
||
</div>
|
||
</div>
|
||
<div class="sreweekly-entry">
|
||
<div class="sreweekly-title"><a href="https://codeascraft.com/2016/09/15/introducing-411-a-new-open-source-framework-for-handling-alerting/" target="_blank">Introducing 411: A new open source framework for handling alerting</a></div>
|
||
<div class="sreweekly-description">
|
||
<p>411 is Etsy’s new tool that runs scheduled queries against Elasticsearch and alerts on the result.</p>
|
||
</div>
|
||
</div>
|
||
<h2>Outages</h2>
|
||
<ul class="sreweekly-outages">
|
||
<li><a href="http://www.ibtimes.co.uk/loud-noise-shut-down-ing-banks-main-data-centre-bucharest-10-hours-1580799">ING Bank</a>
|
||
<ul class="sreweekly-outage">
|
||
<li class="sreweekly-outage">Here’s a terribly interesting root cause: during a test, the fire response system emitted an incredibly loud sound while dumping an inert gas into the datacenter — probably loud enough to cause <a href="http://www.noisehelp.com/noise-dose.html">hearing damage</a>. This caused failure in multiple key spinning hard drives. Remember <a href="https://youtube.com/watch?v=HQn8EaT1WTE">shouting at hard drives</a>?</li>
|
||
</ul>
|
||
</li>
|
||
<li><a href="https://status.heroku.com/incidents/941">Heroku Status</a>
|
||
<ul class="sreweekly-outage">
|
||
<li class="sreweekly-outage">Heroku released a followup with details on last week’s outage.
|
||
<p><small><em>Full disclosure: Heroku is my employer.</em></small></li>
|
||
</ul>
|
||
</li>
|
||
<li><a href="http://www.cbronline.com/news/cloud/public/cloud-outages-hit-microsoft-and-google-5007386">Gmail for Work</a></li>
|
||
<li><a href="http://www.zdnet.com/article/global-dns-outage-hits-microsoft-azure-customers/">Microsoft Azure</a>
|
||
<ul class="sreweekly-outage">
|
||
<li class="sreweekly-outage">Major outage involving most DNS queries for Azure resources failing. Microsoft posted a <a href="https://azure.microsoft.com/en-us/status/history/">report</a> including a root cause analysis.</li>
|
||
</ul>
|
||
</li>
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