CKA試験、Deployment（命令語のみ）

kubectl deployment

チートシート

deployment 作成

kubectl create deployment (deployment name) --image=(image name):(version)

deployment scale調整

kubectl scale deployment (deployment name) --replicas=5 --record

deployemnt のバージョン更新

kubectl set image deployment (deployment name) (container_name)=(image):(image version) --recrod

例）

kubectl create deployment webserver --image=nginx:1.14 --dry-run=client -o yaml > 7.yaml
vi 7.yaml

編集前 7.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  creationTimestamp: null
  labels:
    app: webserver
  name: webserver
spec:
  replicas: 1
  selector:
    matchLabels:
      app: webserver
  strategy: {}
  template:
    metadata:
      creationTimestamp: null
      labels:
        app: webserver
    spec:
      containers:
      - image: nginx:1.14
        name: nginx
        resources: {}
status: {}

編集後 7.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: webserver
  name: webserver
spec:
  replicas: 5
  selector:
    matchLabels:
      app: webserver
  template:
    metadata:
      labels:
        app: webserver
    spec:
      containers:
      - image: nginx:1.14
        name: container-nginx

# ファイルを適応
kubectl apply -f ./7.yaml
# deployment.apps/webserver created

# scale 調整
kubectl scale deployment --replicas=2 --record
# deployment.apps/webserver scaled

# imageのバージョン変更
kubectl set image deployment webserver container-nginx=nginx:1.15 --record
# deployment.apps/webserver image updated 

kubectl set image deployment
kubectl scale deployment

deploymentを前のバージョンに戻す

kubectl rollout history deployment (deployment name)
kubectl rollout undo deployment (deployment name)
kubectl rollout undo deployment (deployment name) --to-revision=(number)

例）

# 履歴の確認
kubectl rollout history deployment webserver
# deployment.apps/webserver
# REVISION  CHANGE-CAUSE
# 1         <none>
# 2         kubectl set image deployment webserver container-nginx=nginx:1.15 --record=true

# Deploymentの戻し
kubectl rollout undo deployment webserver --to-revision=1
# deployment.apps/webserver rolled back