Dokcer14_6：Docker Compose搭建springboot项目

• 搭建步骤
• HelloController
• pom.xml
• application.yml
• Dockerfile
• docker-compose.yml
• 运行输出

搭建步骤

1. 编写微服务项目
2. dockerfile构建镜像
3. docker-compose.yml编排项目
4. 放到服务器执行docker-compose up

HelloController

package com.example.helloworld.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {


    @Autowired
    StringRedisTemplate redisTemplate;

    @RequestMapping("/hello")
    public String hello(){
        Long views = redisTemplate.opsForValue().increment("views");
        return "hello ==== "+views;
    }
}

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.3</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>HelloWorld</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>HelloWorld</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <version>RELEASE</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <version>RELEASE</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

application.yml

spring:
  redis:
    host: redis

Dockerfile

# 指定基础镜像，代码依托于jdk8来运行
FROM java:8

# 当前目录下的所有jar拷贝到app.jar
COPY *.jar /app.jar

CMD ["--server.port=8080"]

# 对外暴露端口8080
EXPOSE 8080

# 执行java -jar对当前目录下的app.jar文件
ENTRYPOINT ["java","-jar","/app.jar"]

docker-compose.yml

# compose版本，向下兼容的，选择最高版本
version: '3.9'
# 定义服务
services:
  hellow_orld:
    build: .
    image: hellow_orld
    depends_on:
      - redis
    ports:
    - "8080:8080"
  redis:
    image: "library/redis:alpine"

运行输出

[root@VM-0-3-centos helloworlddemo]# docker-compose up -d
Building hellow_orld
Sending build context to Docker daemon  27.56MB

Step 1/5 : FROM java:8
 ---> d23bdf5b1b1b
Step 2/5 : COPY *.jar /app.jar
 ---> bea79f8886a0
Step 3/5 : CMD ["--server.port=8080"]
 ---> Running in b72cbd5cb918
Removing intermediate container b72cbd5cb918
 ---> 30dcb328c62d
Step 4/5 : EXPOSE 8080
 ---> Running in 9124a1fde72e
Removing intermediate container 9124a1fde72e
 ---> 8d07b17afbac
Step 5/5 : ENTRYPOINT ["java","-jar","/app.jar"]
 ---> Running in 112e6cb7bb1d
Removing intermediate container 112e6cb7bb1d
 ---> 8302836dba05
Successfully built 8302836dba05
Successfully tagged hellow_orld:latest
WARNING: Image for service hellow_orld was built because it did not already exist. To rebuild this image you must use `docker-compose build` or `docker-compose up --build`.
Creating helloworlddemo_redis_1 ... done
Creating helloworlddemo_hellow_orld_1 ... done
[root@VM-0-3-centos helloworlddemo]# docker ps
CONTAINER ID   IMAGE              COMMAND                  CREATED          STATUS         PORTS                                         NAMES
5b33999b74c1   hellow_orld        "java -jar /app.jar …"   9 seconds ago    Up 8 seconds   0.0.0.0:8080->8080/tcp, :::8080->8080/tcp     helloworlddemo_hellow_orld_1
384f8a5968e3   redis:alpine       "docker-entrypoint.s…"   10 seconds ago   Up 8 seconds   6379/tcp                                      helloworlddemo_redis_1
6d25dfce59f5   wordpress:latest   "docker-entrypoint.s…"   2 days ago       Up 2 days      0.0.0.0:8000->80/tcp, :::8000->80/tcp         wordpress_wordpress_1
6f3764e26dd0   mysql:5.7          "docker-entrypoint.s…"   2 days ago       Up 2 days      3306/tcp, 33060/tcp                           wordpress_db_1
ec5e06e95677   redis:alpine       "docker-entrypoint.s…"   3 days ago       Up 3 days      6379/tcp                                      test_redis_1
c863e9cd5098   helloapp:0.1       "java -jar /app.jar …"   5 days ago       Up 5 days      0.0.0.0:49158->8080/tcp, :::49158->8080/tcp   helloapp01
[root@VM-0-3-centos helloworlddemo]# curl localhost:8080/hello
hello ==== 1[root@VM-0-3-centos helloworlddemo]#