13 Docker Compose

1 安装Compose

从 Github 上下载它的二进制包来使用
最新发行的版本地址：https://github.com/docker/compose/releases

# 下载
[root@localhost compose]# curl -L https://github.com/docker/compose/releases/download/1.25.1/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   617    0   617    0     0    896      0 --:--:-- --:--:-- --:--:--   896
100 16.2M  100 16.2M    0     0  1735k      0  0:00:09  0:00:09 --:--:-- 2366k

# 可执行权限
[root@localhost compose]# chmod +x /usr/local/bin/docker-compose

# 查看安装是否成功
[root@localhost compose]# docker-compose -v
docker-compose version 1.25.1, build a82fef07

2 使用

将jar包上传到该目录下

[root@localhost compose]# vi Dockerfile
FROM openjdk:8
MAINTAINER gp6 <gp6@test.com>

# VOLUME 指定了临时文件目录为/tmp。
# 其效果是在主机 /var/lib/docker 目录下创建了一个临时文件，并链接到容器的/tmp
VOLUME /tmp

# 将jar包添加到容器中并更名为docker-boot.jar
ADD SpringBoot-1.0-SNAPSHOT.jar docker-boot.jar

# 运行jar包
RUN bash -c 'touch /docker-boot.jar'

EXPOSE 8081

ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/docker-boot.jar"]

# 在 jar 包所在路径创建文件 docker-compose.yml
[root@localhost compose]# vi docker-compose.yml
# 表示该 Docker-Compose 文件使用的是 Version 3 file
version: '3'

services:
  # 指定服务名称
  docker-compose-test:

    # 指定 Dockerfile 所在路径
    build: .  

    # 指定端口映射
    ports:    
      - "9000:8080"


# 启动并运行容器  
[root@localhost compose]# docker-compose up -d
Creating network "compose_default" with the default driver
Building docker-demo
Step 1/7 : FROM openjdk:8
 ---> f8146facf376
......
docker-demo_1  | 2020-01-09 02:29:28.430  INFO 1 --- [           main] com.gp6.HelloApplication                 : Started HelloApplication in 6.277 seconds (JVM running for 7.637)

# 查看容器
[root@localhost compose]# docker  ps -a
CONTAINER ID        IMAGE                         COMMAND                  CREATED             STATUS                       PORTS                              NAMES
f091b46f3f85        compose_docker-compose-test   "java -Djava.securit…"   23 seconds ago      Up 21 seconds                8081/tcp, 0.0.0.0:9000->8080/tcp   compose_docker-compose-test_1

# 测试
[root@localhost compose]# curl 127.0.0.1:9000/hello
hello world！

# 列出所有运行容器
[root@localhost compose]# docker-compose ps
            Name                           Command               State                Ports              
---------------------------------------------------------------------------------------------------------
compose_docker-compose-test_1   java -Djava.security.egd=f ...   Up      0.0.0.0:9000->8080/tcp, 8081/tcp

# 查看服务日志输出
[root@localhost compose]# docker-compose logs
Attaching to compose_docker-compose-test_1
docker-demo_1  | 
docker-demo_1  |   .   ____          _            __ _ _
docker-demo_1  |  /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
docker-demo_1  | ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
docker-demo_1  |  \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
docker-demo_1  |   '  |____| .__|_| |_|_| |_\__, | / / / /
docker-demo_1  |  =========|_|==============|___/=/_/_/_/
......
docker-demo_1  | 2020-01-09 02:34:09.979  INFO 1 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 50 ms