Kubernetes Cluster Backup Script

run.sh

#!/bin/bash

## Run on Master/Control Plane!

IFS=$'\n'
arr1=($(kubectl get -o=name namespace))

for ns in "${arr1[@]}"; do
  names="${ns##*/}"
  echo "$names"
  arr2=($(kubectl get -o=name pvc,configmap,serviceaccount,secret,ingress,service,deployment,statefulset,hpa,job,cronjob,daemonset -n $names))

  for rs in "${arr2[@]}"; do
    echo "..$rs"
    mkdir -p "$names/$(dirname $rs)"
    kubectl get -o=yaml $rs -n $names > "$names/$rs.yaml"
  done
done

arr3=($(kubectl get -o=name storageclass,persistentvolume,clusterrolebinding,clusterrole,rolebinding,role,serviceaccount))

for rl in "${arr3[@]}"; do
    echo "$rl"
    mkdir -p "$(dirname $rl)"
    kubectl get -o=yaml $rl -n $names > "$rl.yaml"
done

I needed a quick and easy way to export my k8s configs to yaml for a migration, so I wrote this script.