作用：存储不加密数据到 etcd，让 Pod 以变量或者 Volume 挂载到容器中
场景：配置文件
创建配置文件
redis.properties
redis.host=127.0.0.1 redis.port=6379 redis.password=123456
创建 ConfigMap
# 根据 redis.properties 创建 redis-config [root@k8smaster ~]# kubectl create configmap redis-config --from-file=redis.properties # 查看 configmap [root@k8smaster ~]# kubectl get cm # 查看 redis-config 的详情 [root@k8smaster ~]# kubectl describe cm redis-config
以 Volume 的形式进行挂载到 pod 容器中
cm.yaml
apiVersion: v1 kind: Pod metadata: name: mypod spec: containers: - name: busybox image: busybox command: [ "/bin/sh","-c","cat /etc/config/redis.properties" ] volumeMounts: - name: config-volume mountPath: /etc/config volumes: - name: config-volume configMap: name: redis-config restartPolicy: Never
# 创建 yaml文件 [root@k8smaster ~]# vi cm.yaml # 创建pod [root@k8smaster ~]# kubectl apply -f cm.yaml # 启动后可以查看日志 [root@k8smaster ~]# kubectl logs mypod
以变量的形式进行挂载
创建 yaml，声明变量信息 configmap 创建
myconfig.yaml
apiVersion: v1 kind: ConfigMap metadata: name: myconfig namespace: default data: special.level: info special.type: hello
config-var.yaml
apiVersion: v1 kind: Pod metadata: name: mypod spec: containers: - name: busybox image: busybox command: [ "/bin/sh", "-c", "echo $(LEVEL) $(TYPE)" ] env: - name: LEVEL valueFrom: configMapKeyRef: name: myconfig key: special.level - name: TYPE valueFrom: configMapKeyRef: name: myconfig key: special.type restartPolicy: Never
[root@k8smaster ~]# vi myconfig.yaml [root@k8smaster ~]# kubectl apply -f myconfig.yaml # 以变量形式进行挂载 [root@k8smaster ~]# vi config-var.yaml [root@k8smaster ~]# kubectl apply -f config-var.yaml
