docker-compose部署java前后端分离项目

脚本安装（有点low，狗头报名）

#!/bin/bash
echo -e "\e[35m 输入1自定义安装，2默认docker-ce-18.06.1.ce-3.el7安装 \e[0m"
read -p " 请输入1,2: " select_docker_version
if [ $select_docker_version == 1 ]; then
        read -p "docker_version版本:" docker_version
        yum install -y yum-utils && \
        yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo && \
        yum -y install $docker_version && \
        systemctl start docker && \
        systemctl enable docker > /dev/null
        if [ $? -eq 0 ]; then
                echo -e "\e[35m $docker_version 安装完成，启动完成并开启开机自启 \e[0m"
        else
                echo -e "\e[31m $docker_version 安装失败 \e[0m"
	fi
        echo "安装docker-compose version 1.18.0"
        curl -L https://github.com/docker/compose/releases/download/1.18.0/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose && \
        chmod +x /usr/local/bin/docker-compose && \
        ln -s /usr/local/bin/docker-compose /usr/bin/ > /dev/null
        if [ $? -eq 0 ]; then
                echo -e "\e[35m docker-compose version 1.18.0 安装完成，已内置系统命令 \e[0m"
        else
                echo -e "\e[31m docker-compose version 1.18.0安装失败 \e[0m"
	fi
elif [ $select_docker_version == 2 ]; then
        yum install -y yum-utils && \
        yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo && \
        yum -y install docker-ce-18.06.1.ce-3.el7 && \
        systemctl start docker && \
        systemctl enable docker > /dev/null
        if [ $? -eq 0 ]; then
                echo -e "\e[35m docker-ce-18.06.1.ce-3.el7 安装完成，启动完成并开启开机自启 \e[0m"
        else
                echo -e "\e[31m docker-ce-18.06.1.ce-3.el7 安装失败 \e[0m"
	fi
        echo "安装docker-compose version 1.18.0"
        curl -L https://github.com/docker/compose/releases/download/1.18.0/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose && \
        chmod +x /usr/local/bin/docker-compose && \
        ln -s /usr/local/bin/docker-compose /usr/bin/ > /dev/null
        if [ $? -eq 0 ]; then
                echo -e "\e[35m docker-compose version 1.18.0 安装完成，已内置系统命令 \e[0m"
        else
                echo -e "\e[31m docker-compose version 1.18.0安装失败 \e[0m"
	fi
else 
	echo -e "输入1,2"
fi

安装docker18.06.1-ce(手动)

1.添加docker-ce yum源

安装扩展yum功能，以便使用yum-config-manager添加docker软件源信息

yum install -y yum-utils
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

2.查看当前可以安装docker-ce版本

安装指定版本的格式 ,注意3:xxx 请移除3: 我这里使用docker-ce-18.06.1.ce-3.el7

yum list docker-ce --showduplicates | sort -r
yum -y install docker-ce-[VERSION]   
yum install -y docker-ce-18.06.1.ce-3.el7 

3.启动测试

systemctl start docker && systemctl enable docker
docker info

Containers: 15
 Running: 12
 Paused: 0
 Stopped: 3
Images: 26
Server Version: 18.06.1-ce
Storage Driver: overlay2
 Backing Filesystem: xfs
 Supports d_type: true
 Native Overlay Diff: true
Logging Driver: json-file
Cgroup Driver: systemd
Plugins:
 Volume: local
 Network: bridge host macvlan null overlay
 Log: awslogs fluentd gcplogs gelf journald json-file logentries splunk syslog
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 468a545b9edcd5932818eb9de8e72413e616e86e
runc version: 69663f0bd4b60df09991c08812a60108003fa340
init version: fec3683
Security Options:
 seccomp
  Profile: default
Kernel Version: 3.10.0-693.el7.x86_64
Operating System: CentOS Linux 7 (Core)
OSType: linux
Architecture: x86_64
CPUs: 2
Total Memory: 7.585GiB
Name: k8s-node3
ID: 5BLO:XOV2:EFX3:5SXB:M2JF:L6D7:TWGR:UQ6E:A56P:MXAZ:TTQR:R2DG
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
Labels:
Experimental: false
Insecure Registries:
 127.0.0.0/8
Live Restore Enabled: false

WARNING: bridge-nf-call-iptables is disabled
WARNING: bridge-nf-call-ip6tables is disabled

安装docker-compose

1.下载docker-compose

curl -L https://github.com/docker/compose/releases/download/1.18.0/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose

2.赋予docker-compose全局可执行权

chmod +x /usr/local/bin/docker-compose && ln -s /usr/local/bin/docker-compose /usr/bin/
docker-compose --version

docker-compose version 1.18.0, build 8dd22a9

docker-compose java项目目录规划

1.环境描述

• docker：18.06.1-ce
• docker-comepose：1.18.0
• vue 2 && npm 14.17.3
• java1.8

2.文件目录解释

• config目录：config目录内放项目运行所需要挂载进容器的配置文件及数据文件
• import-base-image目录：docker save所保留下的tar归档基础镜像文件，例：java:8、mysql:8、nginx:1.21.3等，还有docker load镜像的脚本
• java目录：每个java项目在java目录内单独一个目录，目录内放置jar包、Dockerfile、build.sh、wait-for所用脚本等（打包镜像所用脚本）
• docker-compose.yml ： 我所理解的docker-compose.yml跟k8s内的资源清单一样，就是docker-compose编排配置文件
• build_java_image.sh：进入到所有java项目目录内，把jar包打入docker镜像内 && 也可以在docker-compose.yml文件中通过build指定上下文及dockerfile来进行构建镜像

3.目录层级展示

docker-compose常用命令

• docker-compose ps ：查看运行容器
• docker-compose up -d ：后台启动容器 && 资源清单有变化镜像有更新可以更新
• docker-compose down -v : 关闭，下线

docker-compose.yml

version: '3'

networks:
   data_security:
      ipam:
         config:
         - subnet: 172.62.0.0/16            #自定义固定容器ip 实现容器间通讯，增强docker-compose项目可移植性

services:
  mysql:
    image: mysql:8.0.20
    container_name: mysql
    ports:
      - 30306:3306
    command:
      --default-authentication-plugin=mysql_native_password
      --character-set-server=utf8mb4
      --collation-server=utf8mb4_general_ci
      --explicit_defaults_for_timestamp=true
      --lower_case_table_names=1
    environment:
      - TZ=Asia/Shanghai
      - LANG=en_US.UTF-8
      - MYSQL_ROOT_PASSWORD=xxxxxx
    privileged: true
    restart: always
    volumes:
      - ./config/mysql/conf/my.cnf:/etc/mysql/my.cnf
      - ./config/mysql/logs:/var/log/mysql
      - ./config/mysql/data:/var/lib/mysql
      - ./config/mysql/init:/docker-entrypoint-initdb.d/
      #- ./config/mysql/sql:/opt/sql              #初始化sql第一次启动mysql并导入数据可以将注释去掉，导完之后注释掉。
    networks:
      data_security:
        ipv4_address: 172.62.0.5

  gateway-service:
    build:                                         #在docker-compose.yml文件中通过build指定上下文及dockerfile来进行构建镜像
      context: ./java/gateway-service/
      dockerfile: Dockerfile
    image: gateway-service:1.0    
    container_name: gateway-service
    expose:
      - 8999
    privileged: true
    restart: always
    environment:
      - TZ=Asia/Shanghai
      - LANG=en_US.UTF-8
    networks:
      data_security:
        ipv4_address: 172.62.0.6

  group-module:
    build:                                         #在docker-compose.yml文件中通过build指定上下文及dockerfile来进行构建镜像
      context: ./java/group-module/
      dockerfile: Dockerfile
    image: group-module:1.0
    container_name: group-module
    expose:
      - 8890
    privileged: true
    restart: always
    volumes:
      - ./java/xxl-job/:/opt/
    environment:
      - TZ=Asia/Shanghai
      - LANG=en_US.UTF-8
    networks:
      data_security:
        ipv4_address: 172.62.0.7

  core4ct-module-system:
    build:                                         #在docker-compose.yml文件中通过build指定上下文及dockerfile来进行构建镜像
      context: ./java/core4ct-module-system/
      dockerfile: Dockerfile
    image: core4ct-module-system:1.0
    container_name: core4ct-module-system
    expose:
      - 8080
      - 30201
    privileged: true
    restart: always
    environment:
      - TZ=Asia/Shanghai
      - LANG=en_US.UTF-8
    networks:
      data_security:
        ipv4_address: 172.62.0.8

  core4ct-gateway:
    build:                                         #在docker-compose.yml文件中通过build指定上下文及dockerfile来进行构建镜像
      context: ./java/core4ct-gateway/
      dockerfile: Dockerfile
    image: core4ct-gateway:1.0
    container_name: core4ct-gateway
    expose:
      - 9000
    privileged: true
    restart: always
    environment:
      - TZ=Asia/Shanghai
      - LANG=en_US.UTF-8
    networks:
      data_security:
        ipv4_address: 172.62.0.9

  #province-module:
  #  image: province-module:1.0
  #  container_name: province-module
  #  expose:
  #    - 8888
  #  privileged: true
  #  restart: always
  #  environment:
  #    - TZ=Asia/Shanghai
  #    - LANG=en_US.UTF-8
  #  networks:
  #    data_security:
  #      ipv4_address: 172.62.0.10

  redis:
    image: redis:latest
    container_name: redis
    hostname: redis
    restart: always
    ports:
      - 6379:6379
    volumes:
      - ./config/redis/conf/redis.conf:/etc/redis/redis.conf   #挂载redis.conf不然后续重启redis密码会失效
      - ./config/redis/data:/data
    environment:
      - TZ=Asia/Shanghai
      - LANG=en_US.UTF-8
    command: ["redis-server","/etc/redis/redis.conf"]          #指定配置文件启动redis
    networks:
      data_security:
        ipv4_address: 172.62.0.13

  xxl-job-admin:
    build:                                         #在docker-compose.yml文件中通过build指定上下文及dockerfile来进行构建镜像
      context: ./java/xxl-job-admin/
      dockerfile: Dockerfile
    image: xxl-job-admin:1.0
    container_name: xxl-job-admin
    ports:
      - 30998:8998
      #- 30988:9988
    restart: always
    environment:
      - TZ=Asia/Shanghai
      - LANG=en_US.UTF-8
    networks:
      data_security:
        ipv4_address: 172.62.0.11

  nginx:
    image: nginx:1.21.3
    container_name: nginx-group
    ports:
      - 30028:80
    restart: always
    volumes:
      - ./config/nginx/:/etc/nginx/
      - ./config/html/dist/:/usr/share/nginx/html/
    environment:
      - TZ=Asia/Shanghai
      - LANG=en_US.UTF-8
    networks:
      data_security:
        ipv4_address: 172.62.0.12

#  nginx-province:
#    image: province-frontend:1.20.1
#    container_name: nginx-province
#    ports:
#      - 30029:443
#    restart: always
#    volumes:
#      - ./config/nginx-province/:/etc/nginx/
#      - ./config/html-province/dist/:/usr/share/nginx/html/
#    environment:
#      - TZ=Asia/Shanghai
#      - LANG=en_US.UTF-8
#    networks:
#      data_security:
#        ipv4_address: 172.62.0.22

docker-compose常用命令

• docker-compose ps ：查看运行容器
• docker-compose up -d ：后台启动容器 && 资源清单有变化镜像有更新可以更新
• docker-compose down -v : 关闭，下线
• docker-compose up -d --build : 更新镜像，并后台启动

docker-compose启动顺序

介于某些环境中java微服务需要到nacos拿配置文件，而这个时候nacos的启动又很慢，就会导致我们的java微服务找不到nacos而启动失败。docker-compos.yml中有一个depends_on参数可用，但是实际用起来还是不太灵光，它只是把相互有依赖的容器按照顺序启动；只是容器的启动，容器内的服务启动还是跟之前一样，所以并没有采用。我这里采用的是wait-for的一个思路，将写好的shell脚本check_nacos.sh嵌入容器。通过curl循环判断去探测nacos状态码返回值，如果为200则跳出循环执行run.sh，run.sh的内容也就是java项目的启动命令。以下是代码，路径，dockerfile等。

check_nacos.sh

#!/bin/bash

while :
    do
        # 访问nacos注册中心，获取http状态码
        CODE=`curl -I -m 10 -o /dev/null -s -w %{http_code}  http://172.62.0.15:8848/nacos/#/login`
        # 判断状态码为200
        if [[ $CODE -eq 200 ]]; then
            # 输出绿色文字，并跳出循环
            echo -e "\033[42;34m nacos-server is ok \033[0m"
            break
        else
            # 暂停1秒
            sleep 1
            echo -e "\033[41;37m nacos-server is not ok \033[0m"
        fi
    done

# while结束时，也就是nacos启动完成后，执行容器中的run.sh。
bash /root/run.sh

run.sh

#!/bin/bash
java -jar /root/core4ct-gateway-1.0-SNAPSHOT.jar

dockerfile

FROM java:8
COPY ./core4ct-gateway-1.0-SNAPSHOT.jar /root
COPY ./check_nacos.sh /root
COPY ./run.sh /root 
EXPOSE 9000
ENTRYPOINT ["bash","/root/check_nacos.sh"]

目录

运行效果

docker网格优化

以上项目启动时会自动生成一个docker网络，因为我们docker-compose.yml内定义了网络的子网，所以单项目正常使用起来也没什么问题。如果有多个项目多个docker-compose.yml的场景下，多个项目之间也有微服务需要通过docker内部网络进行通信，或者我们docker-compose down -v时这个网卡都会随着我们项目的关闭而被释放掉。介于这种情况我们需要在外建立一个docker网格并指定网卡，再通过docker-compose.yml使用此网卡，即可实现多项目、多docker-compose.yml互相通过内部调用微服务、单独启动关闭某个项目；以下是配置摘要：

创建docker网格

docker network create --driver bridge --subnet 172.62.0.0/16 --gateway 172.62.0.1 cq-data-security

修改编排文件，多个docker-compose.yml配置方法一致

docker-compose.yml

version: '3'

networks:
  cq-data-security:
    external: true

services:
  mysql:
    image: mysql:8.0.20
    container_name: mysql
    networks:
      cq-data-security:
        ipv4_address: 172.62.0.5