如何把springboot项目部署到k8s

柔情只为你懂 2024-03-22 11:53 64阅读 0赞

### springboot部署到k8s步骤 ###

*  1.  springboot项目打包镜像部署到镜像仓库
 *  1.  登录私有镜像仓库，拉去镜像
 *  1.  创建deployment
 *  1.  暴露服务访问端口

#### 创建secret ####

登录私有仓库需要创建secret，存储docker registry的认证信息

#### 创建secret ####

~$ kubectl create secret docker-registry fdf-docker-secret --docker-server=registry.cn-chengdu.aliyuncs.com --docker-username=17602117026 --docker-password=用户密码
    secret/fdf-docker-secret created
    ~$
    ~$
    ~$ kubectl get secret
    NAME                TYPE                             DATA   AGE
    fdf-docker-secret   kubernetes.io/dockerconfigjson   1      15s
    复制代码

创建好之后，后续需要挂载到pod上

#### 创建deployment的yaml文件 ####

快速创建一个deployment,导出yaml文件

~$ kubectl create deployment k8sdemo --image=registry.cn-chengdu.aliyuncs.com/fandf/k8s-test:1.0.0 --dry-run=client -o yaml > k8sdemo.yaml
    ~$ cat k8sdemo.yaml
    apiVersion: apps/v1
    kind: Deployment
    metadata:
      creationTimestamp: null
      labels:
        app: k8sdemo
      name: k8sdemo
    spec:
      replicas: 1
      selector:
        matchLabels:
          app: k8sdemo
      strategy: {}
      template:
        metadata:
          creationTimestamp: null
          labels:
            app: k8sdemo
        spec:
          containers:
          - image: registry.cn-chengdu.aliyuncs.com/fandf/k8s-test:1.0.0
            name: k8s-test
            resources: {}
    status: {}
    ~$
    复制代码

修改k8sdemo.yaml文件

#1.修改副本数量为2 
    #2.挂在secret
    
    apiVersion: apps/v1
    kind: Deployment
    metadata:
      creationTimestamp: null
      labels:
        app: k8sdemo
      name: k8sdemo
    spec:
      replicas: 2
      selector:
        matchLabels:
          app: k8sdemo
      strategy: {}
      template:
        metadata:
          creationTimestamp: null
          labels:
            app: k8sdemo
        spec:
          imagePullSecrets:
            - name: fdf-docker-secret
          containers:
          - image: registry.cn-chengdu.aliyuncs.com/fandf/k8s-test:1.0.0
            name: k8s-test
            resources: {}
    status: {}
    复制代码

#### 创建deployment ####

~$ kubectl apply -f k8sdemo.yaml
    deployment.apps/k8sdemo created
    ~$ kubectl get deploy
    NAME      READY   UP-TO-DATE   AVAILABLE   AGE
    k8sdemo   0/2     2            0           12s
    ~$ kubectl get deploy
    NAME      READY   UP-TO-DATE   AVAILABLE   AGE
    k8sdemo   2/2     2            2           24s
    ~$ kubectl get pod
    NAME                       READY   STATUS    RESTARTS   AGE
    k8sdemo-65d45fb49f-l4kx5   1/1     Running   0          28s
    k8sdemo-65d45fb49f-pqsjw   1/1     Running   0          28s
    复制代码

#### 创建service, nodePort ####

#port 服务端口    target-port pod端口
    
    ~$ kubectl expose deploy k8sdemo --port=9001 --target-port=9001 --type=NodePort
    service/k8sdemo exposed
    ~$
    ~$ kubectl get svc k8sdemo
    NAME      TYPE       CLUSTER-IP    EXTERNAL-IP   PORT(S)          AGE
    k8sdemo   NodePort   10.96.10.79   <none>        9001:31921/TCP   12s
    ~$ curl http://127.0.0.1:31921/api/v1/user/name
    zhangsan                                                                                                                            
    复制代码

可以看到serviced的ip为10.96.10.79 对外端口为 31921，安全组需开放该端口才能访问

到这里我们服务部署就算完成了，看一下所有的节点

~$ kubectl get secret,pod,svc,deploy
    NAME                       TYPE                             DATA   AGE
    secret/fdf-docker-secret   kubernetes.io/dockerconfigjson   1      52m
    
    NAME                           READY   STATUS    RESTARTS   AGE
    pod/k8sdemo-65d45fb49f-l4kx5   1/1     Running   0          39m
    pod/k8sdemo-65d45fb49f-pqsjw   1/1     Running   0          39m
    
    NAME                 TYPE        CLUSTER-IP    EXTERNAL-IP   PORT(S)          AGE
    service/k8sdemo      NodePort    10.96.10.79   <none>        9001:31921/TCP   5m51s
    service/kubernetes   ClusterIP   10.96.0.1     <none>        443/TCP          301d
    
    NAME                      READY   UP-TO-DATE   AVAILABLE   AGE
    deployment.apps/k8sdemo   2/2     2            2           39m
    ~$