k8s部署java项目

编写Dockerfile并制作镜像

[root@master ~]# mkdir -p java/files
[root@master ~]# mv halo-1.4.16.jar java/files/
[root@master ~]# cd test/
[root@master java]# touch Dockerfile
[root@master java]# ls
Dockerfile  files
[root@master java]# 
[root@master java]# cat Dockerfile 
FROM centos

COPY files/halo-1.4.16.jar /usr/local/halo-1.4.16.jar

ENTRYPOINT ["java","-jar","/usr/local/halo-1.4.16.jar"]

上传镜像到docker仓库

[root@master java]# docker build -t syblyw0806/halo:v1.0 .
Sending build context to Docker daemon  79.63MB
Step 1/3 : FROM centos
latest: Pulling from library/centos
a1d0c7532777: Pull complete 
Digest: sha256:a27fd8080b517143cbbbab9dfb7c8571c40d67d534bbdee55bd6c473f432b177
Status: Downloaded newer image for centos:latest
 ---> 5d0da3dc9764
Step 2/3 : COPY files/halo-1.4.16.jar /usr/local/halo-1.4.16.jar
 ---> cefd030026a7
Step 3/3 : ENTRYPOINT ["java","-jar","/usr/local/halo-1.4.16.jar"]
 ---> Running in fcf50769678f
Removing intermediate container fcf50769678f
 ---> 831c48376ea4
Successfully built 831c48376ea4
Successfully tagged syblyw0806/halo:v1.0

上传镜像到docker仓库

[root@master ~]# docker login
Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.
Username: syblyw0806
Password: 
WARNING! Your password will be stored unencrypted in /root/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store

Login Succeeded
[root@master ~]# docker push syblyw0806/halo:v1.0
The push refers to repository [docker.io/syblyw0806/halo]
6689ff9ad7dc: Pushed 
74ddd0ec08fa: Mounted from library/centos 
v1.0: digest: sha256:646a46c8596fce1ee83e42d82414855f900dd216c859e810c389820e06324ae4 size: 741

编写k8s的资源清单

[root@master java]# vi halo.yml 
apiVersion: apps/v1
kind: Deployment
metadata:
  name: halo
  labels:
    app: halo
spec:
  replicas: 1
  selector:
    matchLabels:
      app: halo
  template:
    metadata:
      name: halo
      labels:
        app: halo
    spec:
      containers:
      - image: syblyw0806/halo:v1.0
        imagePullPolicy: IfNotPresent
        name: halo
---
apiVersion: v1
kind: Service
metadata:
  name: halo
spec:
  ports:
  - port: 8090
    targetPort: 8090
    nodePort: 31234
  selector:
    app: halo
apiVersion: apps/v1
kind: Deployment
metadata:
  name: halo
  labels:
    app: halo
spec:
  replicas: 1
  selector:
    matchLabels:
      app: halo
  template:
    metadata:
      name: halo
      labels:
        app: halo
    spec:
      containers:
      - image: syblyw0806/halo:v1.0
        imagePullPolicy: IfNotPresent
        name: halo
---
apiVersion: v1
kind: Service
metadata:
  name: halo
spec:
  ports:
  - port: 8090
    targetPort: 8090
    nodePort: 32767
  selector:
    app: halo
  type: NodePort

创建

[root@master java]# kubectl apply -f halo.yml
deployment.apps/halo created
service/halo created

查看

[root@master java]# kubectl get deploy,pod,svc
NAME                   READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/halo   0/1     1            0           24s

NAME                        READY   STATUS              RESTARTS   AGE
pod/halo-5696bcd9fd-7q5pd   1/1     Running             0          24s

NAME                 TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)          AGE
service/halo         NodePort    10.110.97.27            8090:31234/TCP   24s
service/kubernetes   ClusterIP   10.96.0.1               443/TCP          9d