前言
使用jenkins關聯github發佈springboot項目還是很簡單的,本篇文章介紹一下結合docker發佈的流程。
ps:本文的服務器是centos7
安裝docker
yum install docker
安裝完以後,需要將其設置開機啓動
systemctl start docker.service
systemctl enable docker.service
然後使用中國的加速器,這樣下載鏡像的時候會快一些
vi /etc/docker/daemon.json
#添加後:
{
"registry-mirrors": ["https://registry.docker-cn.com"],
"live-restore": true
}
重新啓動docker
systemctl restart docker
ps:jdk 和maven也是需要安裝的,我這遍就不重複補充,具體可以看我之前的文章:
https://segmentfault.com/a/1190000014060856
springboot項目
1.pom.xml
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.9.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.iamcrawler</groupId>
<artifactId>docker-demo</artifactId>
<version>latest</version>
<name>docker-demo</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<docker.image.prefix>springboot</docker.image.prefix>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<finalName>docker-demo</finalName>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<!-- Docker maven plugin -->
<plugin>
<groupId>com.spotify</groupId>
<artifactId>docker-maven-plugin</artifactId>
<version>1.0.0</version>
<configuration>
<imageName>${docker.image.prefix}/${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>
<!-- Docker maven plugin -->
</plugins>
</build>
</project>
2.在目錄src/main/docker下創建 Dockerfile 文件,Dockerfile 文件用來說明如何來構建鏡像。
FROM openjdk:8-jdk-alpine
VOLUME /tmp
ADD docker-demo.jar app.jar
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
這個 Dockerfile 文件很簡單,構建 Jdk 基礎環境,添加 Spring Boot Jar 到鏡像中,簡單解釋一下:
- FROM ,表示使用 Jdk8 環境 爲基礎鏡像,如果鏡像不是本地的會從 DockerHub 進行下載
- VOLUME ,VOLUME 指向了一個
/tmp
的目錄,由於 Spring Boot 使用內置的Tomcat容器,Tomcat 默認使用/tmp
作爲工作目錄。這個命令的效果是:在宿主機的/var/lib/docker
目錄下創建一個臨時文件並把它鏈接到容器中的/tmp
目錄 - ADD ,拷貝文件並且重命名
- ENTRYPOINT ,爲了縮短 Tomcat 的啓動時間,添加
java.security.egd
的系統屬性指向/dev/urandom
作爲 ENTRYPOINT
3.controller
@RestController
@RequestMapping("/docker")
public class DockerDemoController {
@GetMapping("/hello")
public ResponseEntity demo(){
return ResponseEntity.ok("hello docker");
}
}
這樣 Spring Boot 項目添加 Docker 依賴就完成了。
jenkins配置
jenkins我們關聯上自己的github地址後,選擇執行shell
#!/bin/bash
##找出進程並關閉
pids=$(ps -ef | grep docker-demo.jar| awk '{print $2}')
for pid in $pids
do
echo $pid
kill -9 $pid
done
echo "進程$pid已被kill"
##打包
mvn clean install -Dmaven.test.skip=true
echo "maven 執行完畢"
cur=$(pwd)
echo "當前路徑$cur"
cp $cur/target/docker-demo.jar /docker/jar/docker-demo.jar
dockerpids=$(docker ps -f name="docker-demo" | awk '{print $1}' )
for dockerpid in $dockerpids
do
echo "被刪除的容器 $dockerpid"
docker stop $dockerpid
docker rm $dockerpid
done
echo "容器已刪除完畢!"
ipids=$(docker images | grep "springboot/docker-demo" | awk '{print $3}')
for imagesid in $ipids
do
echo "被刪除的image $imagesid"
docker rmi $imagesid
done
echo "舊的docker docker-demo 容器和鏡像已刪除"
mvn clean package -Dmaven.test.skip=true docker:build
echo "docker打包完成"
docker run --name="docker-demo" -p 7779:7779 -t springboot/docker-demo
echo "啓動完畢"
此時我們訪問www.iamcrawler.cn:7779/docker/hello就可以看到結果了...