Kubernetes configMap - 只有一个文件

Question

我有一个从文件创建的configMap:

kubectl create configmap ssportal-apache-conf --from-file=ssportal.conf=ssportal.conf

然后我需要将此文件安装到部署中:

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: ssportal
spec:
  replicas: 2
  template:
    metadata:
      labels:
        app: ssportal
    spec:
      containers:
        - name: ssportal
          image: eu.gcr.io/my-project/ssportal:0.0.0
          ports:
          - containerPort: 80
          volumeMounts:
            - name: apache2-config-volume
              mountPath: /etc/apache2/
      volumes:
        - name: apache2-config-volume
          configMap:
            name: ssportal-apache-conf
            items:
              - key: ssportal.conf
                path: sites-enabled/ssportal.conf

但这实际上会从容器中删除现有的 /etc/apache2/ 目录，并将其替换为唯一的文件 /etc/apache2/sites-enabled/ssportal.conf.

是否可以在现有配置目录上仅覆盖一个文件？

Answer 1

好吧，这有点棘手。最终的工作 YAML 规范是

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: ssportal
spec:
  replicas: 2
  template:
    metadata:
      labels:
        app: ssportal
    spec:
      containers:
        - name: ssportal
          image: eu.gcr.io/my-project/ssportal:0.0.0
          command: ["sleep","120d"]
          ports:
          - containerPort: 80
          volumeMounts:
            - name: test
              mountPath: /etc/apache2/conf-enabled/test.conf
              subPath: test.conf
      volumes:
        - name: test
          configMap:
            name: sstest

和configMap创建步骤:

echo "# comment" > test.conf
kubectl create configmap sstest --from-file=test.conf=test.conf