springboot与docker集成三步曲之项目打包部署
前面我们构建了jdk运行环境的镜像,这里我们只需要将springboot项目打包到该镜像中,形成一个新的镜像springboot-docker,到时候,利用这个镜像启动容器。再做端口映射,就可以访问我们部署在docker中的springboot项目了。
1、构建springboot项目,编写pom.xml文件。
<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>com.xxx</groupId>
<artifactId>springboot-docker</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>springboot-docker</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.4.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
<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>1.1.1</version>
<configuration>
<imageName>local/${project.artifactId}</imageName>
<dockerDirectory>src/main/docker</dockerDirectory>
<resources>
<resource>
<targetPath>/</targetPath>
<directory>${project.build.directory}</directory>
<include>${project.build.finalName}.jar</include>
</resource>
</resources>
</configuration>
</plugin>
</plugins>
</build>
</project>
项目结构:
2、编写App.java启动类,该启动类还兼顾controller的角色。
package com.xxx.springbootwithdocker;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@SpringBootApplication
@RestController
public class App{
public static void main( String[] args ){
SpringApplication.run(App.class, args);
}
@GetMapping("/")
public String index(){
return "{\"id\":\"1001\",\"content\":\"this is a docker\"}";
}
}
3、准备打包的Dockerfile文件。src/main目录下新建docker文件夹,并新建Dockerfile文件,文件内容如下:
FROM local/centos7-jdk8
VOLUME /tmp
ADD springboot-docker-0.0.1-SNAPSHOT.jar app.jar
RUN sh -c 'touch /app.jar'
ENV JAVA_OPTS=""
ENTRYPOINT [ "sh", "-c", "java $JAVA_OPTS -Djava.security.egd=file:/dev/./urandom -jar /app.jar" ]
4、编译打包镜像。gitshell命令行切换到springboot-docker项目目录下,运行mvn clean package docker:build
$ mvn clean package docker:build
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building springboot-docker 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-clean-plugin:3.0.0:clean (default-clean) @ springboot-docker ---
[INFO] Deleting d:\git\GameWorld\Service\springboot-docker\target
[INFO]
[INFO] --- maven-resources-plugin:3.0.2:resources (default-resources) @ springboot-docker ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory d:\git\GameWorld\Service\springboot-docker\src\main\resources
[INFO] skip non existing resourceDirectory d:\git\GameWorld\Service\springboot-docker\src\main\resources
[INFO]
[INFO] --- maven-compiler-plugin:3.7.0:compile (default-compile) @ springboot-docker ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to d:\git\GameWorld\Service\springboot-docker\target\classes
[INFO]
[INFO] --- maven-resources-plugin:3.0.2:testResources (default-testResources) @ springboot-docker ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory d:\git\GameWorld\Service\springboot-docker\src\test\resources
[INFO]
[INFO] --- maven-compiler-plugin:3.7.0:testCompile (default-testCompile) @ springboot-docker ---
[INFO] No sources to compile
[INFO]
[INFO] --- maven-surefire-plugin:2.21.0:test (default-test) @ springboot-docker ---
[INFO] No tests to run.
[INFO]
[INFO] --- maven-jar-plugin:3.0.2:jar (default-jar) @ springboot-docker ---
[INFO] Building jar: d:\git\GameWorld\Service\springboot-docker\target\springboot-docker-0.0.1-SNAPSHOT.jar
[INFO]
[INFO] --- spring-boot-maven-plugin:2.0.4.RELEASE:repackage (default) @ springboot-docker ---
[INFO]
[INFO] --- docker-maven-plugin:1.1.1:build (default-cli) @ springboot-docker ---
[INFO] Using authentication suppliers: [ConfigFileRegistryAuthSupplier]
[INFO] Copying d:\git\GameWorld\Service\springboot-docker\target\springboot-docker-0.0.1-SNAPSHOT.jar
-> d:\git\GameWorld\Service\springboot-docker\ta
rget\docker\springboot-docker-0.0.1-SNAPSHOT.jar
[INFO] Copying src\main\docker\Dockerfile -> d:\git\GameWorld\Service\springboot-docker\target\docker\Dockerfile
[INFO] Building image local/springboot-docker
Step 0 : FROM local/centos7-jdk8
---> 526ac3c7d9bc
Step 1 : VOLUME /tmp
---> Running in 3e280a0ada9a
---> a5413101d40c
Removing intermediate container 3e280a0ada9a
Step 2 : ADD springboot-docker-0.0.1-SNAPSHOT.jar app.jar
---> fd445c67de28
Removing intermediate container 6c88bd797017
Step 3 : RUN sh -c 'touch /app.jar'
---> Running in 3848c1b364fe
---> 4a5ce0df766f
Removing intermediate container 3848c1b364fe
Step 4 : ENV JAVA_OPTS ""
---> Running in 7593b0bf0660
---> e91748a27f6c
Removing intermediate container 7593b0bf0660
Step 5 : ENTRYPOINT sh -c java $JAVA_OPTS -Djava.security.egd=file:/dev/./urandom -jar /app.jar
---> Running in 7f3b41d42b33
---> f6ee77cee236
Removing intermediate container 7f3b41d42b33
Successfully built f6ee77cee236
[INFO] Built local/springboot-docker
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 30.636 s
[INFO] Finished at: 2018-09-26T10:58:38+08:00
[INFO] Final Memory: 51M/458M
[INFO] ------------------------------------------------------------------------
构建成功,我们可以查看镜像,启动容器。
启动成功,需要做一个端口映射,我们就可以通过windows本机上的浏览器访问springboot项目。
访问 http://localhost:18080/
至此,springboot与docker集成,已经全部完成,整个过程基本都是在配置docker镜像,构建docker镜像。