configmap使用

 

1.从文件中创建
kubectl create configmap log-config --from-file=log_level.conf -n test

查看

[root@master yaml_test]# kubectl describe cm log-config -n test
Name:         log-config
Namespace:    test
Labels:       <none>
Annotations:  <none>

Data
====
log_level.conf:
----
agfaagfsgfdetrtrewfg


fsdgf


BinaryData
====

Events:  <none>

 

这里的key=log_level.conf value为对应的内容

 

2.创建pod

[root@master yaml_test]# more busybox.yaml 
apiVersion: v1
kind: Pod
metadata:
  name: configmap-pod
  namespace: "test"
spec:
  containers:
    - name: test
      image: registry.cn-shenzhen.aliyuncs.com/hxlk8s/busybox:1.32
      command: ['sh', '-c', 'echo "The app is running!" && tail -f /dev/null']
      volumeMounts:
        - name: config-vol
          mountPath: /etc/config
  volumes:
    - name: config-vol
      configMap:
        name: log-config
        items:
          - key: log_level.conf
            path: log_level.conf ##这里的path可以定义为其他的文件名称，比如aaaa.conf,不一定与key名称一致

 

创建pod

kubectl apply -f busybox.yaml

 

3.登录pod查看
kubectl exec -it configmap-pod -n test -- /bin/sh

/etc/config # pwd
/etc/config
/etc/config # ls
log_level.conf

会在/etc/config这个目录下生成文件log_level.conf