Merry Christmas to those celebrating, and thanks to everyone on-call over this busy period for lots of services. Lots of content this week, on deployment decisions, SLOs, SBOMs, serverless management and more.

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News

A post on Sysadvent, considering systems safety and deployment decisions under stressful circumstances.
https://sysadvent.blogspot.com/2021/12/day-20-to-deploy-or-not-to-deploy-that.html

A post on making SLOs and SLIs more discoverable and managing them in code, using a custom DSL. Not everyone will have the time to build such custom tooling but it’s an interesting insight to SLO management at scale.
https://engineering.fb.com/2021/12/13/production-engineering/slick/

This was the thing that interested me in Kubernetes to begin with, the argument for a standard API.
https://joshgav.github.io/2021/12/16/kubernetes-isnt-about-containers.html

A look at working with Terraform and Serverless Framework together to manage AWS Lambda applications in a declarative manner.
https://tsh.io/blog/aws-infrastructure-terraform-serverless/

A post on what to look for when exploring software for managing SBOMs.
https://advisory.kpmg.us/blog/2021/software-bills-materials.html

An interesting post on the complexity of caching and the potential for cache poisoning attacks at scale.
https://youst.in/posts/cache-poisoning-at-scale/

Some observations and recommendations about the secure usage of third party APT repositories and risks with signing keys having broader scope than probably expected.
https://blog.cloudflare.com/dont-use-apt-key/

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Tools

PolicyGlass allows for combining multiple AWS IAM policies/statements into their ‘effective permissions’, deduplicating permissions, and eliminating denied permissions along the way.
https://policyglass.cloudwanderer.io/en/latest/
https://sandbox.policyglass.cloudwanderer.io/

Copybara looks an interesting source code management tool, useful for importing sections of code from a confidential repository to a public repository, importing code from a public repository to a confidential repository, importing a change from a non-authoritative repository into the authoritative repository and more.
https://github.com/google/copybara

A handy wrapper around go’s toolchain, to make it easier to install and manage go binaries on your path.
https://github.com/TekWizely/bingo

Colima provides a simple way of provisioning a container runtime (either Docker or Containerd) on macOS.
https://github.com/abiosoft/colima