docker-compose scale部署多实例

1、在项目根目录执行打包

mvn clean package

2、进入target目录下

cd target

3、创建Dockerfile文件：

touch Dockerfile
vim Dockerfile

#在Dockerfile中加上以下内容
FROM java:8
VOLUME /tmp
ADD dk-1.0.0.jar dk.jar
RUN bash -c 'touch /dk.jar'
EXPOSE 9001
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","dk.jar"]

 4、构建镜像

docker build -t dk/dk:1.0.0 .

5、创建docker-compose.yml

touch docker-compose.yml
vim docker-compose.yml
#在docker-compose.yml中添加以下内容
version: '3'
services:
  dk:
    image: dk/dk:1.0.0
  lib: 
    image: dockercloud/haproxy 
    links: 
      - dk
    ports: 
      - 8080:80
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock

 6、部署

docker-compose up --scale dk=3 -d

7、验证

[root@k8s-master target]# docker-compose ps
    Name                  Command               State                            Ports                         
---------------------------------------------------------------------------------------------------------------
target_dk_1    java -Djava.security.egd=f ...   Up      9001/tcp                                               
target_dk_2    java -Djava.security.egd=f ...   Up      9001/tcp                                               
target_dk_3    java -Djava.security.egd=f ...   Up      9001/tcp                                               
target_lib_1   /sbin/tini -- dockercloud- ...   Up      1936/tcp, 443/tcp, 0.0.0.0:8080->80/tcp,:::8080->80/tcp
[root@k8s-master target]# curl http://127.0.0.1:8080/test
1634634512207