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Blog post summary: Automating safe, hands-off deployments at AWS

AWS’s Clare Liguori wrote an excellent blog post on Automating safe, hands-off deployments.

This is a summary (1,700 words, vs 5,300 in the original) and mostly just a copy & paste of highlights. I have also skipped some of the sections that are at scales larger than most folks deal with (e.g. global releases across 26 regions!).

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Blog post summary: Domain-Oriented Microservice Architecture at Uber

Domain-Oriented Microservice Architecture at Uber” is a blog post on the Uber engineering blog. There were some comments about the post not giving credit to prior art, which I think is fair, but it is a useful post none the less. Uber provide an interesting approach to classifying and organizing their (2,200!) microservices, by using the concepts of Domains, Layers, Gateways and Extensions.

This is a shortened version here (1,200 words, vs 3,800 in the original), since I tend to learn by creating summaries, but it is mostly just a copy & paste, so check out the original with diagrams etc if you’re really interested.

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Preparing for 1-1s as a manager

1-1s are likely to be some of the most important meetings on your calendar. This post discusses how to prepare and run these in a way that makes them useful for both you and your team member, and helps keep both of you accountable.

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Beginning with SRE

This post is an introduction into some basic SRE practices we have been implementing at my company recently.

I’ve written before on SRE, including on SRE resources, SLIs, SLOs and SLAs, and Creating an SRE team, but this is a more practical guide to getting started.

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SRE Metrics

A very quick post on some of the most commonly used SRE metrics: The Four Golden Metrics, and RED & USE.

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Creating an SRE team

If you wanted to build an SRE team at your company, how would you go about it? How would you structure it?

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SRE Resources

The following are a list of SRE resources I’m finding useful. I will update it as I find more. The good news is that most of the books (including all 3 of the Google SRE books) are available for free download at https://landing.google.com/sre/books.

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eBook Summary: What Is SRE?

What Is SRE? An Introduction to Site Reliability Engineering” (registration required but free), is an ebook by Kurt Andersen & Craig Sebenik, published by O’Reilly. The following is a summary (abridged copy and paste) of the parts I found most useful, with a few of my own notes. The original is about 9,000 words; this is about 2,000.

 

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So you want to be a Manager?

Despite how satisfying and fun designing and writing software can be, building high performing teams can be even more so. The highs are higher and the lows are lower, but overall it can be an incredibly rewarding career and developing future leaders on your team is a key responsibility.

So, as a manager, how do you handle an individual contributor (IC) engineer on your team expressing interest in becoming a manager?

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Development and delivery practices for team success

Most metrics for measuring developer productivity, such as lines of code or issues closed, are notoriously ineffective. But the research in the excellent State of Devops report shows that, rather than focusing on local metrics and individual developer performance, it is better to look at overall development and delivery practices. Specifically, there are metrics that predict and reflect a team’s ability to successfully deliver working software into production, including deployment frequency, and the mean time to restore service after an incident. This articles discusses why some metrics are useless, and takes a closer look at the recommendations in the 2019 State of Devops report.

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Report Summary: Accelerate State of DevOps 2019

This is an abridged version of The Accelerate State of DevOps Report 2019; essentially a cut and paste of the most salient parts. The original is about 18,000 words; This is about 2,500 words.

I highly recommend reading the original in its entirety, if you have time, and I’m a big fan of the Accelerate book too. As with all the other summaries I create, this just as as way to help me digest and understand an excellent article.

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File, Block and Object Storage

I was in an AWS class today, where they were talking about S3, and how it is “object storage”. But what does that mean? One way to explain it is to contrast it with other types of file storage, namely File and Block Storage.
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Is Apdex useful?

I’ve been trying to figure out what SLOs to define for some services recently, and wondering if Apdex is a useful metric. (See my previous post on the difference between SLIs, SLOs and SLAs)

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SLI, SLO and SLA

What are SLIs, SLOs and SLAs? 

Service Level Indicators (SLIs) are metrics that you choose to measure the health and performance of your services. Service Level Objectives (SLOs) are the desired target for those indicators. Service Level Agreements (SLAs) build on this and include the consequences of not meeting those targets. All are fundamental to Site Reliability Engineering.

In this post, I’ll try to explain each in more detail, how they relate to each other, and some examples of each.

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SRE vs DevOps

I’m really enjoying the Seeking SRE book. Chapter 12 covers SRE vs DevOps; a community sourced compare and contrast type discussion.

My favorite description is from Thomas Limoncelli, who suggested that:

DevOps engineers focus on the SDLC pipeline with occasional responsibilities for production operations. SREs focus on production operations with occasional responsibilities for the SDLC pipeline.

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