DEVOPS WEEKLY ISSUE #339 - 25th June 2017
Lots of container tools this week, along with a solid set of posts on everything from the advantages of on-call to a few stories of tuning a search index and dealing with a production failure.
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News
A great post on what developers (or operators) learn from being on call, and more specifically from supporting software in production. Good points about confidence, understanding the edges of a system, risk analysis and more.
https://jvns.ca/blog/2017/06/18/operate-your-software/
A nice follow on from the above, this post shows the tools behind exploring a real production incident, from finding the issue via instrumentation to looking at logs to debug the issue.
https://www.slideshare.net/seiffertp/monitoring-and-logging-in-wonderland
With containers it’s always worth understanding how they work, as the nature of the abstraction means it can leak. This post contains a bunch of examples and make it clear portability is not compatibility.
http://crunchtools.com/portability-not-compatibility/
A solid write-up of tuning a search index, rather than just throwing more hardware at it, when indexing 35 million documents and optimising for query performance.
https://medium.com/@giovannidamiola/making-the-internet-archives-full-text-search-faster-30fb11574ea9
A good experience report from running Kubernetes on Azure. A useful format comparing initial impressions with changes and improvements over the last year. Lots of handy tips for Azure usage too.
http://dev.haufe.io/state-of-kubernetes-on-azure-part-ii/
A presentation going through 10 years of deployment tooling changes for a simple Rails application. From capistrano to Kubernetes with lots of steps in between.
https://phraseapp.s3-eu-west-1.amazonaws.com/cap-to-kube.pdf
A walkthrough of creating a custom image on Azure using the standard tooling, and then launching instances of that image using Terraform.
http://www.anniehedgie.com/azure-vm-from-custom-image-in-terraform
Having a dynamically provisioned version of your application stood up for proposed code changes is a useful way of reviewing the running app alongside the proposed source code changes. This post shows how to use GitLab and Docker to accomplish this.
https://blog.bitexpert.de/blog/dockerizing-gitlab-review-apps/
CNCF - Cloud Native Computing Foundation
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Tools
Kube-bench is a handy tool for checking a Kubernetes installation against the published security guidelines in the CIS Kubernetes 1.6 Benchmark.
https://github.com/aquasecurity/kube-bench
ImageWolf is a new tool to help quickly distribute Docker images around a cluster using BitTorrent. ImageWolf runs on Docker Swarm and can integrate with both the Docker Hub and local registries.
http://container-solutions.com/lightning-image-deployment-imagewolf/
https://github.com/ContainerSolutions/ImageWolf
Buildkit is a new, low level, tool for building container images. The intention is to provide the backend for build in a separate package, allowing for compatible but new and different build interfaces to be built.
https://github.com/moby/buildkit
Managing secrets in a way that feels native to Kubernetes has been much discussed. Sealed Secrets therefore looks like an potential approach with some interesting properties.
https://github.com/bitnami/sealed-secrets
New eBook for DevOps pros: The Dev and Ops Guide to Incident Management offers 25+ pages of essential insight into building teams and improving your response to downtime.
http://try.victorops.com/DevOpsWeekly/IM_eBook