k8s优雅操作pod容器组

k8s优雅操作pod容器组

回退备份

kubectl get deploy deployName -o yaml>>deployName-bak-`date "+%Y-%m-%d"`.yaml

获取副本数

replicas=`echo | kubectl get -o template deploy/deployName --template={{.spec.replicas}}`

停止容器组

kubectl scale deployment deployName --replicas=0

修改配置

kubectl set env deploy/deployName privateCertPath="/var/www/cert/xxx.key"

替换内容

kubectl get deploy deployName -o yaml | sed "s#cert#cert-new#g" | kubectl replace -f -

增加内容

cat <<EOF > ./patch-file.yaml
spec:
  template:
    spec:
      containers:
      - name: patch-demo
        image: redis
EOF
kubectl patch deployment deployName --patch "$(cat patch-file.yaml)"

恢复容器组

kubectl scale deployment trade-service --replicas=$replicas

验证比较

kubectl get deploy deployName -oyaml>>deployName-new-`date "+%Y-%m-%d"`.yaml
kubectl diff --filename="deployName-new-`date "+%Y-%m-%d"`.yaml,deployName-bak-`date "+%Y-%m-%d"`.yaml"

回退

kubectl apply -f deployName-bak-`date "+%Y-%m-%d"`.yaml

其他

操作secret数据卷

kubectl delete secret secretName
kubectl create secret generic secretName --from-file=./xxx.key --from-file=./xx.cer --from-file=./xxx.cer