Secret解决了明码、token、密钥等敏感数据的配置问题，而不须要把这些敏感数据裸露到镜像或者Pod Spec中，Secret能够以Volume或者环境变量的形式应用

Secret有三种类型：

  • Service Account： 用来拜访Kubernetes API，有Kubernetes主动创立，并且会主动挂载到Pod的/run/secrets/kubernetes.io/serviceaccount 目录中
  • Opaque：base64编码格局的Secret，用来存储明码、密钥等
  • kubernetes.io/dockerconfigjson:用来存储公有docker registry的认证信息

Service Account

Service Account用来拜访Kubernetes API，有Kubernetes主动创立，并且会主动挂载到Pod的/run/secrets/kubernetes.io/serviceaccount 目录中

$ kubectl run nginx --image nginxdeployment "nginx" created$ kubectl get pods...$ kubectl exec nginx-xxx ls /run/secrets/kubernetes.io/serviceaccountca.crtnamespacetoken

Opaque Secret

1.创立阐明

$ echo -n "admin" | base64YWRtaW4=$ echo -n "1f2d1e2e67df" | base64MWYyZDFlMmU2N2Rm

secrets.yaml

apiVersion: v1kind: Secretmetadata:  name: mysecrettype: Opaquedata:  password: MWYyZDFlMmU2N2Rm  username: YWRtaW4=

2.应用形式

2.1 将Secret挂载到Volume中

apiVersion: v1kind: Podmetadata:  labels:    name: secret-test  name: secret-testspec:  volumes:  - name: secrets    secret:      secretName: mysecret  containers:  - image: myapp:v1    name: db    volumeMounts:    - name: secrets      mountPath: "/etc/secrets"      readOnly: true

2.2 将Secret导入到环境变量中

apiVersion: extensions/v1beta1kind: Deploymentmetadata:  name: pod-deploymentspec:  replicas: 2  template:    metadata:      labels:        app: pod-deployment    spec:      containers:      - name: pod-1        image: myapp:v1        ports:        - containerPort: 80        env:        - name: TEST_USER          valueFrom:            secretKeyRef:              name: mysecret              key: username        - name: TEST_PASSWORD          valueFrom:            secreKeyRef:              name: mysecret              key: password

Kubernetes.io/dockerconfigjson

应用Kubectl创立docker registry认证的secret

$ kubectl create docker-registry myregistrykey --docker-server=hub.example.com --docker-username=admin --docker-password=Harbor12345 --docker-email=Yuan_sr@163.com

在创立Pod的时候，通过imagePullSecrets 来援用刚创立的myregistrykey

apiVersion: v1kind: Podmetadata:  name: foospec:  containers:    - name: foo      image: wst/example:v1 #公有仓库中的镜像  imagePullSecrets:    - name: myregistrykey