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示例: 改变镜像名称和标签

首先构建一个工作空间:

DEMO_HOME=$(mktemp -d)

创建包含pod资源的 kustomization

cat <<EOF >$DEMO_HOME/kustomization.yaml
resources:
- pod.yaml
EOF

创建 pod 资源pod.yaml

cat <<EOF >$DEMO_HOME/pod.yaml
apiVersion: v1
kind: Pod
metadata:
  name: myapp-pod
  labels:
    app: myapp
spec:
  containers:
  - name: myapp-container
    image: busybox:1.29.0
    command: ['sh', '-c', 'echo The app is running! && sleep 3600']
  initContainers:
  - name: init-mydb
    image: busybox:1.29.0
    command: ['sh', '-c', 'until nslookup mydb; do echo waiting for mydb; sleep 2; done;']
EOF

myapp-pod 包含一个init容器和一个普通容器,两者都使用 busybox:1.29.0 镜像。

kustomization.yaml 中添加 images 字段来更改镜像 busybox 和标签 1.29.0

  • 通过 kustomize 添加 images

    cd $DEMO_HOME
    kustomize edit set image busybox=alpine:3.6
  • images字段将被添加到kustomization.yaml

    images:
    - name: busybox
      newName: alpine
      newTag: 3.6

构建 kustomization

kustomize build $DEMO_HOME

确认busybox镜像和标签是否被替换为alpine:3.6

test 2 = \
  $(kustomize build $DEMO_HOME | grep alpine:3.6 | wc -l); \
  echo $?