之前学习了docker，今天就来试试将这个项目打包成docker镜像并通过运行一个镜像来运行项目。这里使用的项目是el-admin。是一个开源的springboot后端管理框架（前端vue），有兴趣的小伙伴可以去看看。

网址：https://el-admin.vip

关于docker的入门可以查看我之前的博客：https://www.cnblogs.com/pluto-charon/p/14118514.html

需要使用到的容器有:mysql、redis、nginx

1.打包后端代码

在这里使用的是springboot多模块的代码。所以打包还是有点麻烦的，在网上找了好久，试了好几种方式，都不行。

1.模块结构

整个项目的摸块结构如下图所示：eladmin为父摸块，但这个模块出来pom没有其他的代码。

• eladmin-common 为系统的公共模块，各种工具类，公共配置存在该模块
• eladmin-system 为系统核心模块也是项目入口模块，也是最终需要打包部署的模块
• eladmin-logging 为系统的日志模块，其他模块如果需要记录日志需要引入该模块
• eladmin-tools 为第三方工具模块，包含：图床、邮件、云存储、本地存储、支付宝
• eladmin-generator 为系统的代码生成模块，代码生成的模板在 system 模块中

1. 在父pom.xml里加上maven的编译插件

    <build>
           <plugins>
               <!-- 打包时跳过测试 -->
               <plugin>
                   <groupId>org.apache.maven.plugins</groupId>
                   <artifactId>maven-surefire-plugin</artifactId>
                   <configuration>
                       <skip>true</skip>
                   </configuration>
               </plugin>
               <plugin>
                   <groupId>org.apache.maven.plugins</groupId>
                   <artifactId>maven-compiler-plugin</artifactId>
                   <version>3.1</version>
                   <configuration>
                       <source>${java.version}</source>
                       <target>${java.version}</target>
                   </configuration>
               </plugin>
          <plugins>
     <build>
   

2. 在eladmin-system（项目入口模块）的pom.xml文件里添加：

   <build>
           <plugins>
               <plugin>
                   <groupId>org.springframework.boot</groupId>
                   <artifactId>spring-boot-maven-plugin</artifactId>
                   <configuration>
                       <!-- 指定该Main Class为全局的唯一入口 -->
                       <mainClass>me.zhengjie.AppRun</mainClass>
                       <layout>ZIP</layout>
                   </configuration>
                   <executions>
                       <execution>
                           <goals>
                               <goal>repackage</goal><!--可以把依赖的包都打包到生成的Jar包中-->
                           </goals>
                       </execution>
                   </executions>
               </plugin>
           </plugins>
       </build>
   

3. 其他的模块不变，不需要在pom.xml里面添加build内容。

2.打包

如果配置没有问题的话，那双击maven的package打包就可以成功了。建议是先clean一下，然后在package打包。

打包成功后，就可以在eladmin-system（项目入口模块）的pom同级目录下找到jar包。

3.上传代码并编写dockerfile文件

3.1 启动虚拟机的docker

[root@localhost ~]# systemctl start docker
# 开启docker的远程访问
[root@localhost ~]# vi /lib/systemd/system/docker.service
# 修改ExecStart这一行为
ExecStart=/usr/bin/dockerd  -H tcp://0.0.0.0:2375  -H unix:///var/run/docker.sock
# 查看防火墙的状态
[root@localhost system]# systemctl status firewalld
# 如果是开启的，则需要关闭防火墙并且禁用
[root@localhost system]# systemctl stop firewalld & systemctl disable firewalld

[root@localhost el-admin]# vi Dockerfile
# 文件内容
FROM java:8

ARG JAR_FILE=./*.jar
COPY ${JAR_FILE} el-admin.jar
ENV TZ=Asia/Shanghai
ENTRYPOINT ["java","-jar","el-admin.jar"]

docker build -f Dockerfile -t eladmin .

[root@localhost el-admin]# docker build -f Dockerfile -t eladmin .
Sending build context to Docker daemon  113.4MB
Step 1/5 : FROM java:8
 ---> d23bdf5b1b1b
Step 2/5 : ARG JAR_FILE=./*.jar
 ---> Running in 677b700688ee
Removing intermediate container 677b700688ee
 ---> 208bd80b9acf
Step 3/5 : COPY ${JAR_FILE} el-admin.jar
 ---> e7887c62df96
Step 4/5 : ENV TZ=Asia/Shanghai
 ---> Running in fa7e28fecfb1
Removing intermediate container fa7e28fecfb1
 ---> f26c5e02d2d0
Step 5/5 : ENTRYPOINT ["java","-jar","el-admin.jar"]
 ---> Running in a54176bb6a60
Removing intermediate container a54176bb6a60
 ---> b71ac32872f0
Successfully built b71ac32872f0
Successfully tagged eladmin:latest

[root@localhost el-admin]# docker images
REPOSITORY              TAG                 IMAGE ID            CREATED              SIZE
eladmin                 latest              b71ac32872f0        About a minute ago   750MB

[root@localhost el-admin]# docker run -itd --name redis --restart=always -p 6379:6379 redis

[root@localhost el-admin]# docker run -v /home/el-admin/mysql/:/var/lib/mysql \
-p 3306:3306 -e MYSQL_ROOT_PASSWORD=root \
--privileged=true --restart=always --name mariadb -d mariadb

[root@localhost el-admin]# docker container ls --all
CONTAINER ID        IMAGE                    COMMAND                  CREATED             STATUS                     PORTS                    NAMES
6c390c6dc475        mariadb                  "docker-entrypoint.s…"   5 minutes ago       Up 5 minutes               0.0.0.0:3306->3306/tcp   mariadb
2e465ca985d8        redis                    "docker-entrypoint.s…"   8 minutes ago       Up 8 minutes               0.0.0.0:6379->6379/tcp   redis

docker run -d \
--name nginx --restart always \
-p 80:80 -p 443:443 \
-e "TZ=Asia/Shanghai" \
-v /home/el-admin/nginx/nginx.conf:/etc/nginx/nginx.conf \
-v /home/el-admin/nginx/conf.d:/etc/nginx/conf.d \
-v /home/el-admin/nginx/logs:/var/log/nginx \
-v /home/el-admin/nginx/cert:/etc/nginx/cert \
-v /home/el-admin/nginx/html:/usr/share/nginx/html \
nginx:alpine

server
    {
        listen 80;
        server_name 域名/外网IP;
        index index.html;
        root  /usr/share/nginx/html/eladmin/dist;  #dist上传的路径

        # 避免访问出现 404 错误
        location / {
          try_files $uri $uri/ @router;
          index  index.html;
        }

        location @router {
          rewrite ^.*$ /index.html last;
        }

        # 接口
        location /api {
          proxy_pass http://172.17.0.1:8000;
          proxy_set_header X-Forwarded-Proto $scheme;
          proxy_set_header X-Forwarded-Port $server_port;
          proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
          proxy_set_header Upgrade $http_upgrade;
          proxy_set_header Connection "upgrade";
        }

        # 授权接口
        location /auth {
          proxy_pass http://172.17.0.1:8000;
          proxy_set_header X-Forwarded-Proto $scheme;
          proxy_set_header X-Forwarded-Port $server_port;
          proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
          proxy_set_header Upgrade $http_upgrade;
          proxy_set_header Connection "upgrade";
        }

        # WebSocket 服务
        location /webSocket {
          proxy_pass http://172.17.0.1:8000;
          proxy_set_header X-Forwarded-Proto $scheme;
          proxy_set_header X-Forwarded-Port $server_port;
          proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
          proxy_set_header Upgrade $http_upgrade;
          proxy_set_header Connection "upgrade";
        }

        # 头像
        location /avatar {
          proxy_pass http://172.17.0.1:8000;
        }

        # 文件
        location /file {
          proxy_pass http://172.17.0.1:8000;
        }
    }

[root@localhost nginx]# docker start nginx

docker run -d \
--name eladmin --restart always \
-p 8000:8000 \
-e "TZ=Asia/Shanghai" \
-e DB_HOST=172.17.0.1 \
-e DB_PWD=root \
-e REDIS_HOST=172.17.0.1 \
-v /home/el-admin/data/:/home/eladmin/ \
eladmin