2020-03-25

Note

• pod(Kubernetes)のlifecycle.prestopの挙動 - １クール続けるブログ
  • https://44smkn.hatenadiary.com/entry/2018/08/01/022312
• Dockerfile に apt, apt-get, source コマンドを書く時のTips | cloud.config Tech Blog
  • https://tech-blog.cloud-config.jp/2019-09-09-dockerfile-apt-apt-get-source-tips/
  • 便利, テンプレとして覚えたい

RUN apt update \
 && apt install -y --no-install-recommends \
    cowsay \
    nyancat \
 && apt -y clean \
 && rm -rf /var/lib/apt/lists/*

• Adopting Istio for a multi-tenant Kubernetes cluster in Production
  • https://medium.com/mercari-engineering/adopting-istio-for-a-multi-tenant-kubernetes-cluster-in-production-df1a8260ca24
  • Envoy の preStop, 参考になった

lifecycle:
  preStop:
    exec:
      command: ["/bin/sh", "-c", "while [ $(netstat -plunt | grep tcp | grep -v envoy | wc -l | xargs) -ne 0 ]; do sleep 1; done"]

• Envoy shutting down before the thing it’s wrapping can cause failed requests · Issue #7136 · istio/istio
  • https://github.com/istio/istio/issues/7136
  • 上の preStop の元ネタっぽい