otherguy/k8s-controller-sidecars

Kubernetes Custom Controller - Sidecar Shutdown

Kubernetes (cron)jobs sidecar terminator.

Originally forked from https://github.com/nrmitchi/k8s-controller-sidecars

What is this?

This is a custom Kubernetes controller for the purpose of watching running pods, and sending a SIGTERM to sidecar containers when the "main" application container has exited (and the sidecars are the only non-terminated containers).

This is a response to kubernetes/kubernetes#25908.

Usage

1. Deploy the controller into your cluster

kubectl apply -f manifest.yml

1. Add the pod.kubernetes.io/sidecars annotation to your pods, with a comma-seperated list of sidecar container names.

Example:

---
apiVersion: batch/v1
kind: CronJob
metadata:
  name: test-job
spec:
  schedule: "* * * * *"
  jobTemplate:
    spec:
      template:
        metadata:
          annotations:
            pod.kubernetes.io/sidecars: cloud-sql-proxy
        spec:
          restartPolicy: Never
          containers:
            - name: test-job
              image: ubuntu:latest
              command: ["sleep", "15"]
            - name: cloud-sql-proxy
              image: gcr.io/cloudsql-docker/gce-proxy:1.33.0-alpine
              command: [ "/cloud_sql_proxy" ]