什么是ConfigMap
ConfigMap为Pod中的容器提供了配置文件、环境变量等非敏感信息,通过ConfigMap可以将Pod和其他组件分开,这将使得Pod更加有移植性,使得配置更加容器更改及管理,也使得Pod更加规范。
Config基本操作
通过kubectl create configmap
kubectl create configmap nginx-configmap --from-literal=password=123456
通过yaml资源配置清单
kubectl apply -f nginx-configmap.yaml
apiVersion: v1
kind: List
metadata:
items:
- apiVersion: v1
data: password: "123456"
kind: ConfigMap
metadata: name: nginx-configmap
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通过kubectl get configmap
查看详细信息
通过kubectl describe configmap
查看详细信息
ConfigMap作为存储卷被Pod调用
创建ConfigMap
kubectl create configmap database-config --from-literal=user=root --from-literal=password=123456
通过YAML资源定义清单创建Pod并绑定ConfigMap为存储卷
kubectl apply -f nginx-pod-configmap-volume.yaml
apiVersion: v1
kind: Pod
metadata:
name: nginx-pod
spec:
containers: - name: nginx image: nginx:1.16 volumeMounts: - name: config-volume mountPath: /etc/config
volumes: - name: config-volume configMap: name: database-config
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查看Pod容器挂载的ConfigMap存储卷
kubectl exec -it nginx-pod /bin/bash
查看Pod详细信息,挂载了ConfigMap类型的Volumes
kubectl describe pod nginx-pod
ConfigMap作为环境变量被Pod调用
kubectl create configmap database-config --from-literal=user=root --from-literal=password=123456
kubectl create configmap env-config --from-literal=LOG_LEVEL=ERROR
kubectl apply -f nginx-pod-configmap-env.yaml
apiVersion: v1
kind: Pod
metadata:
name: nginx-pod
spec:
containers: - name: nginx image: nginx:1.16 env: - name: DB_USER_CONFIG valueFrom: configMapKeyRef: name: database-config key: user - name: DB_PASSWORD_CONFIG valueFrom: configMapKeyRef: name: database-config key: password envFrom: - configMapRef: name: env-config
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查看Pod容器的环境变量
kubectl exec -it nginx-pod /bin/bash
查看Pod容器详细信息
kubectl describe pod nginx-pod
Config注意的事项
- ConfigMap文件大小限制: 1MB (etcd的限制)
- ConfigMap必须在Pod引用它之前创建
文章来源: yekangming.blog.csdn.net,作者:叶康铭,版权归原作者所有,如需转载,请联系作者。
原文链接:yekangming.blog.csdn.net/article/details/104495690