Idea是Java开发利器,SpringBoot是Java生态中最流行的微服务框架,docker是时下最火的容器技术,那么它们结合在一起会产生什么化学反应呢?
一、开发前准备
1.Docker的安装可以参考https://docs.docker.com/install/
2.配置docker远程连接端口
- vi /usr/lib/systemd/system/docker.service
找到 ExecStart,在最后面添加 -H tcp://0.0.0.0:2375,如下图所示:
3.重启docker
- systemctl daemon-reload
- systemctl start docker
4.开放端口
- firewall-cmd --zone=public --add-port=2375/tcp --permanent
5.Idea安装插件,重启
6.连接远程docker
(1) 编辑配置
(2) 填远程docker地址
(3) 连接成功,会列出远程docker容器和镜像
二、新建项目
1.创建springboot项目
项目结构图:
(1) 配置pom文件
- <?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
- <modelVersion>4.0.0</modelVersion>
- <groupId>docker-demo</groupId>
- <artifactId>com.demo</artifactId>
- <version>1.0-SNAPSHOT</version>
- <parent>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter-parent</artifactId>
- <version>2.0.2.RELEASE</version>
- <relativePath />
- </parent>
- <properties>
- <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
- <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
- <docker.image.prefix>com.demo</docker.image.prefix>
- <java.version>1.8</java.version>
- </properties>
- <build>
- <plugins>
- <plugin>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-maven-plugin</artifactId>
- </plugin>
- <plugin>
- <groupId>com.spotify</groupId>
- <artifactId>docker-maven-plugin</artifactId>
- <version>1.0.0</version>
- <configuration>
- <dockerDirectory>src/main/docker</dockerDirectory>
- <resources>
- <resource>
- <targetPath>/</targetPath>
- <directory>${project.build.directory}</directory>
- <include>${project.build.finalName}.jar</include>
- </resource>
- </resources>
- </configuration>
- </plugin>
- <plugin>
- <artifactId>maven-antrun-plugin</artifactId>
- <executions>
- <execution>
- <phase>package</phase>
- <configuration>
- <tasks>
- <copy todir="src/main/docker" file="target/${project.artifactId}-${project.version}.${project.packaging}"></copy>
- </tasks>
- </configuration>
- <goals>
- <goal>run</goal>
- </goals>
- </execution>
- </executions>
- </plugin>
- </plugins>
- </build>
- <dependencies>
- <dependency>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter-web</artifactId>
- </dependency>
- <dependency>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter-test</artifactId>
- <scope>test</scope>
- </dependency>
- <dependency>
- <groupId>log4j</groupId>
- <artifactId>log4j</artifactId>
- <version>1.2.17</version>
- </dependency>
- </dependencies>
- </project>
(2) 在src/main目录下创建docker目录,并创建Dockerfile文件
- FROM openjdk:8-jdk-alpine
- ADD *.jar app.jar
- ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
(3) 在resource目录下创建application.properties文件
- logging.config=classpath:logback.xml
- logging.path=/home/developer/app/logs/
- server.port=8990
(4) 创建DockerApplication文件
- @SpringBootApplication
- public class DockerApplication {
- public static void main(String[] args) {
- SpringApplication.run(DockerApplication.class, args);
- }
- }
(5) 创建DockerController文件
- @RestController
- public class DockerController {
- static Log log = LogFactory.getLog(DockerController.class);
- @RequestMapping("/")
- public String index() {
- log.info("Hello Docker!");
- return "Hello Docker!";
- }
- }
(6) 增加配置
命令解释
- Image tag : 指定镜像名称和tag,镜像名称为 docker-demo,tag为1.1
- Bind ports : 绑定宿主机端口到容器内部端口。格式为[宿主机端口]:[容器内部端口]
- Bind mounts : 将宿主机目录挂到到容器内部目录中。格式为[宿主机目录]:[容器内部目录]。这个springboot项目会将日志打印在容器
- /home/developer/app/logs/ 目录下,将宿主机目录挂载到容器内部目录后,那么日志就会持久化容器外部的宿主机目录中。
(7) Maven打包
(8) 运行
先pull基础镜像,然后再打包镜像,并将镜像部署到远程docker运行
这里我们可以看到镜像名称为docker-demo:1.1,docker容器为docker-server
(9) 运行成功
(10) 浏览器访问
(11) 日志查看
自此通过idea 部署springboot项目到docker成功!难以想象,部署一个Javaweb项目竟然如此简单方便!