14、Kubernetes 存储 Secret

红太狼 2023-07-13 13:42 34阅读 0赞

# Secret 存在意义 #

### Secret 解决了密码、token、密钥等敏感数据的配置问题，而不需要把这些敏感数据暴露到镜像或者 Pod Spec中。Secret 可以以 Volume 或者环境变量的方式使用 ###

###### Secret 有三种类型： ######

*  ###### Service Account：用来访问 Kubernetes API，由 Kubernetes 自动创建，并且会自动挂载到 Pod 的/run/secrets/kubernetes.io/serviceaccount目录中 ######
 *  ###### Opaque：base64编码格式的Secret，用来存储密码、密钥等 ######
 *  ###### kubernetes.io/dockerconfigjson：用来存储私有 docker registry 的认证信息 ######

## Service Account ##

###### Service Account 用来访问 Kubernetes API，由 Kubernetes 自动创建，并且会自动挂载到 Pod的/run/secrets/kubernetes.io/serviceaccount目录中 ######

apiVersion: apps/v1
    kind: Deployment
    metadata:
      name: nginx
    spec:
      replicas: 1
      selector:
        matchLabels:
          app: nginx-deploy
      template:
        metadata:
          labels:
            app: nginx-deploy
        spec:
          containers:
          - name: nginx-deployment
            image: nginx
            env:
            - name: GET_HOSTS_FROM
              value: dns
            ports:
            - containerPort: 80

kubectl exec nginx-75cd57fb6-v9t84 -it /bin/sh

![在这里插入图片描述][20200312150121397.png]

## Opaque Secret ##

#### 1、创建说明 ####

###### Opaque 类型的数据是一个 map 类型，要求 value 是 base64 编码格式： ######

echo -n "admin" | base64
    YWRtaW4=
    echo -n "wtl199201180271" | base64
    d3RsMTk5MjAxMTgwMjcx

### secrets.yml ###

apiVersion: v1
    kind: Secret
    metadata:
      name: mysecret
    type: Opaque
    data:
      password: d3RsMTk5MjAxMTgwMjcx
      username: YWRtaW4=

#### 2、使用方式 ####

###### 2.1、将 Secret 挂载到 Volume 中 ######

apiVersion: v1
    kind: Pod
    metadata:
      labels:
        name: secret-test
      name: secret-test
    spec:
      volumes:
      - name: secrets
        secret:
          secretName: mysecret
      containers:
      - image: wangyanglinux/myapp:v1
        name: db
        volumeMounts:
        - name: secrets
          mountPath: "/etc/secret"
          readOnly: true

![在这里插入图片描述][20200312152427849.png]

###### 2.2、将 Secret 导出到环境变量中 ######

apiVersion: apps/v1
    kind: ReplicaSet
    metadata:
      name: nginx
    spec:
      replicas: 3
      selector:
        matchLabels:
          tier: nginx-deploy
      template:
        metadata:
          labels:
            tier: nginx-deploy
        spec:
          containers:
          - name: nginx-deployment
            image: wangyanglinux/myapp:v1
            ports:
            - containerPort: 80
            env:
            - name: TEST_USER
              valueFrom:
                secretKeyRef:
                  name: mysecret
                  key: username
            - name: TEST_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: mysecret
                  key: password

### kubernetes.io/dockerconfigjson ###

###### 使用 Kuberctl 创建 docker registry 认证的 secret ######

kubectl create secret docker-registry myregistrykey --docker-server=DOCKER_REGISTRY_SERVER --docker-username=DOCKER_USER --docker-password=DOCKER_PASSWORD --docker-email=DOCKER_EMAIL

###### 在创建 Pod 的时候，通过imagePullSecrets来引用刚创建的 `myregistrykey` ######

apiVersion: v1
    kind: Pod
    metadata:
      name: pod-test
    spec:
      containers:
      - name: container-test
        image: hub.ljxwtl.cn/library/nginx-deployment:v1.0
      imagePullSecrets:
      - name: myregistrykey

[20200312150121397.png]: /images/20230529/e02f954c4f5342598ed8c9149f8ac945.png
[20200312152427849.png]: /images/20230529/9ffaf209fcdd4c15b32e8c77ce185459.png