Docker——Python和Java微服务使用 Dockerfile 打包成镜像发布上线

Python微服务打包Docker镜像

1. 编写app.py

   mkdir ~/python
   cd ~/python
   vim app.py
   
   #!/usr/bin/python3
   from werkzeug.serving import make_server
   def demo_app(environ, start_response):
   start_response('200 OK', [('Content-Type', 'text/html; charset=utf-8')])
   return ['hello xiaotian'.encode('utf8')]  # 浏览器显示的内容
   
   
   if __name__ == '__main__':
   httpd = make_server('0.0.0.0', 8080, demo_app)
   sa = httpd.socket.getsockname()
   print("Serving HTTP on", sa[0], "port", sa[1], "...")
   
   httpd.serve_forever()  # 服务器在后台一直运行
   
   

   还有写一个模块文件

   vim requirements.txt
   
   werkzeug
   

2. 编写dockerfile

   FROM python
   MAINTAINER xiaotian<[email protected]>
   
   COPY requirements.txt /app/requirements.txt
   COPY app.py /app/app.py
   
   WORKDIR /app
   
   RUN pip install -r ./requirements.txt
   
   EXPOSE 8080
   
   CMD ["python3","/app/app.py"]
   

   对于Dockerfile不熟悉的同学可用参考：
   Dockerfile

3. 构建镜像

   docker build -t pythonapp .
   
   查看
   docker images
   REPOSITORY   TAG       IMAGE ID       CREATED          SIZE
   pythonapp      latest    72e2bbddc994   16 minutes ago   893MB
   

4. 开启容器

   docker run -d -p 8080:8080 --name xiaotian pythonapp
   

5. 发布运行

   后台自动运行
   docker ps
   CONTAINER ID   IMAGE     COMMAND                 CREATED          STATUS          PORTS                                      
   NAMES29cf7f100a55   pythonapp   "python3 /app/app.py"   46 seconds ago   Up 45 seconds   0.0.0.0:8080->8080/tcp, :::8080->8080/tcp  
    xiaotian
   
   测试
   [root@docker python]# curl localhost:8080
   hello xiaotian
   

SpringBoot微服务打包Docker镜像

1. 构架springboot项目

   package xiaotian.app.tian;
   
   import org.springframework.web.bind.annotation.RequestMapping;
   import org.springframework.web.bind.annotation.RestController;
   
   @RestController
   public class helloxiaotian {
          
   
   @RequestMapping("/hello")
   public String Hello(){
          
       return "hello xiaotian";
   }
   

}

测试

2. 打包应用
   
   
   测试
   在CMD里运行jar包
   java -jar app-0.0.1-SNAPSHOT.jar
   

   

3. 编写dockerfile

   mkdir java
   cd java/
   上传jar包
   
   vim Dockerfile
   
   FROM java:8
   MAINTAINER xiaotian<[email protected]>
   
   COPY *.jar /app.jar
   
   CMD ["--server.port=8080"]
   
   EXPOSE 8080
   
   ENTRYPOINT ["java","-jar","/app.jar"]
   
   [root@docker java]# ls
   app-0.0.1-SNAPSHOT.jar  Dockerfile
   

4. 构建镜像

   [root@docker java]# docker build -t javaapp .
   Sending build context to Docker daemon  16.57MB
   Step 1/5 : FROM java:8
   8: Pulling from library/java
   5040bd298390: Pull complete 
   fce5728aad85: Pull complete 
   76610ec20bf5: Pull complete 
   60170fec2151: Pull complete 
   e98f73de8f0d: Pull complete 
   11f7af24ed9c: Pull complete 
   49e2d6393f32: Pull complete 
   bb9cdec9c7f3: Pull complete 
   Digest: sha256:c1ff613e8ba25833d2e1940da0940c3824f03f802c449f3d1815a66b7f8c0e9d
   Status: Downloaded newer image for java:8
    ---> d23bdf5b1b1b
   Step 2/5 : COPY *.jar /app.jar
    ---> fe9445aff5f5
   Step 3/5 : CMD ["--server.port=8080"]
    ---> Running in 7822b686cc94
   Removing intermediate container 7822b686cc94
    ---> 4e1c3095eccb
   Step 4/5 : EXPOSE 8080
    ---> Running in c83a1bf2143c
   Removing intermediate container c83a1bf2143c
    ---> 1bc1901772eb
   Step 5/5 : ENTRYPOINT ["java","-jar","/app.jar"]
    ---> Running in b65c74eeb26e
   Removing intermediate container b65c74eeb26e
    ---> 34bbac318580
   Successfully built 34bbac318580
   Successfully tagged javaapp:latest
   
   查看镜像
   [root@docker java]# docker images
   REPOSITORY   TAG       IMAGE ID       CREATED          SIZE
   javaapp      latest    34bbac318580   54 seconds ago   660MB
   python3      latest    72e2bbddc994   55 minutes ago   893MB
   

5. 发布运行

   docker run -d -P --name xiaotian-springboot-web javaapp
   
   [root@docker java]# docker ps
   CONTAINER ID   IMAGE     COMMAND                  CREATED          STATUS          PORTS     
      NAMES
   0ece0817ea1b   javaapp   "java -jar /app.jar …"   11 seconds ago   Up 10 seconds   0.0.0.0:4
   9154->8080/tcp, :::49154->8080/tcp   xiaotian-springboot-web
   
   curl localhost:49154/hello
   hello xiaotian
   

大功告成！