Maven编译Docker 镜像并推送到Nexus

前提条件:

有一台电脑安装了maven
安装了jdk1.8 以上版本
安装了 git
安装了intellij idea
电脑能上网
有一台nexus 服务器，如果没有可以参考我的另一篇文章:Sonatype Nexus 自动化部署实践 https://blog.csdn.net/happyfreeangel/article/details/89481720
我的nexus 服务器器是支持https的，可以端口是:上传镜像端口是1443, 下载镜像端口是2443，
域名是nexus.linkaixin.com

spotify docker-maven-plugin 官方源代码地址:
https://github.com/spotify/docker-maven-plugin

下面是一个大型网上商店的源代码，用于测试镜像打包，上传nexus.
https://github.com/HappyFreeAngel/mall.git

git clone https://github.com/HappyFreeAngel/mall.git

cd mall
mvn clean compile package docker:build -DpushImage

实现了编译，打包，封装docker 镜像，推送docker 镜像到nexus 仓库。

结果如下:
本地镜像结果如下:
docker images | grep ‘nexus.linkaixin.com:1443/mall’

远程仓库查看：结果如下
![在这里插入图片描述](https://img-blog.csdnimg.cn/2019081616103873.png

看起来很简单的插件，使用起来其实坑很多。
我后来查看了源代码，通过几种测试方法，才发现问题所在。

需要配置的文件: 1. .m2/settings.xml

    <!-- Another sample, using keys to authenticate.<server><id>siteServer</id><privateKey>/path/to/private/key</privateKey><passphrase>optional; leave empty if not used.</passphrase></server>--><server><id>nexus-docker-registry</id><username>admin</username><password>admin123</password><configuration><email>11394019@qq.com</email></configuration></server>

配置pom.xml

<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/maven-v4_0_0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.macro.mall</groupId><artifactId>mall-admin</artifactId><version>1.0-SNAPSHOT</version><packaging>jar</packaging><name>mall-admin</name><description>mall-admin project for mall</description><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><java.version>1.8</java.version><skipTests>true</skipTests></properties><parent><groupId>com.macro.mall</groupId><artifactId>mall</artifactId><version>1.0-SNAPSHOT</version></parent><dependencies><dependency><groupId>com.macro.mall</groupId><artifactId>mall-mbg</artifactId><version>1.0-SNAPSHOT</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-security</artifactId></dependency><!--JWT(Json Web Token)登录支持--><dependency><groupId>io.jsonwebtoken</groupId><artifactId>jjwt</artifactId><version>0.9.0</version></dependency><!-- 阿里云OSS --><dependency><groupId>com.aliyun.oss</groupId><artifactId>aliyun-sdk-oss</artifactId><version>2.5.0</version></dependency><!--集成logstash--><dependency><groupId>net.logstash.logback</groupId><artifactId>logstash-logback-encoder</artifactId><version>4.8</version></dependency><!--lombok依赖--><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></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>1.2.0</version><executions><execution><id>build-image</id><phase>package</phase><goals><goal>build</goal></goals><configuration><imageName>${docker-registry-host}:${docker-registry-host-push-port}/mall/${project.artifactId}:${project.version}</imageName></configuration></execution><execution><id>tag-image</id><phase>package</phase><goals><goal>tag</goal></goals><configuration><image>mall/${project.artifactId}:${project.version}</image><newName>${docker-registry-host}:${docker-registry-host-push-port}/mall/${project.artifactId}:${project.version}</newName></configuration></execution><execution><id>push-image</id><phase>deploy</phase><goals><goal>push</goal></goals><configuration><imageName>${docker-registry-host}:${docker-registry-host-push-port}/mall/${project.artifactId}:${project.version}</imageName></configuration></execution></executions><configuration><imageName>${docker-registry-host}:${docker-registry-host-push-port}/mall/${project.artifactId}:${project.version}</imageName><dockerHost>unix:///var/run/docker.sock</dockerHost>
<!--                    <dockerCertPath>/Users/linyingjie/nexus.linkaixin.com.crt</dockerCertPath>--><baseImage>nexus.linkaixin.com:2443/common-docker-starter:openjdk-8u191-alpine3.8-support-ssh-login-1.0.0</baseImage><entryPoint>["java", "-jar", "-Dspring.profiles.active=prod","/${project.build.finalName}.jar"]</entryPoint><resources><resource><targetPath>/</targetPath><directory>${project.build.directory}</directory><include>${project.build.finalName}.jar</include></resource></resources><serverId>nexus-docker-registry</serverId><!-- <registryUrl>119.145.41.171:8082/v1/</registryUrl> --></configuration></plugin></plugins></build>
</project>

踩到的坑如下:
问题1:
[ERROR] No plugin found for prefix ‘docker’ in the current project and in the plugin groups [org.apache.maven.plugins, org.codehaus.mojo] available from the repositories [local (/Users/linyingjie/.m2/repository), alimaven (http://maven.aliyun.com/nexus/content/groups/public/)] -> [Help 1]

解决办法: .m2/settings.xml 添加 com.spotify

    <!-- pluginGroup| Specifies a further group identifier to use for plugin lookup.<pluginGroup>com.your.plugins</pluginGroup>--><pluginGroup>io.fabric8</pluginGroup><pluginGroup>com.spotify</pluginGroup></pluginGroups>

问题2:
[WARNING] Failed to push nexus.linkaixin.com:1443/mall/mall-admin:1.0-SNAPSHOT, retrying in 10 seconds (1/5).
[INFO] Pushing nexus.linkaixin.com:1443/mall/mall-admin:1.0-SNAPSHOT
The push refers to repository [nexus.linkaixin.com:1443/mall/mall-admin]
214b9fe2899d: Preparing
27e730ca5883: Layer already exists
70eee88b4bab: Layer already exists
4e2f9475b031: Layer already exists
10beb411784d: Layer already exists
aa0369d6605f: Layer already exists
612d6b123925: Waiting
36d9b4d72ec4: Waiting
1de5d7cd5bd1: Waiting
b845f393fc2b: Waiting
dbc783c89851: Waiting
7bff100f35cb: Waiting
[WARNING] Failed to push nexus.linkaixin.com:1443/mall/mall-admin:1.0-SNAPSHOT, retrying in 10 seconds (2/5).

这个原因是因为这个插件优先使用了.docker/config.json，但是这个会超时失败，不知道是什么原因
删除里面的nexus.linkaixin.com 的2条记录，就正常了。

{"auths": {"nexus.linkaixin.com:1443": {},"nexus.linkaixin.com:2443": {}},"HttpHeaders": {"User-Agent": "Docker-Client/18.09.2 (darwin)"},"credsStore": "osxkeychain","stackOrchestrator": "swarm"
}改成下面:
{"auths": {},"HttpHeaders": {"User-Agent": "Docker-Client/18.09.2 (darwin)"},"credsStore": "osxkeychain","stackOrchestrator": "swarm"
}这个其实就是让docker-maven-plugin 在config.json 里找不到关于nexus.linkaixin.com账号配置,
让它搜索settings.xml 里的配置账号信息。

[INFO] — docker-maven-plugin:1.2.0:tag (tag-image) @ mall-admin —
[INFO] Using authentication suppliers: [ConfigFileRegistryAuthSupplier, FixedRegistryAuthSupplier]
[INFO] Creating tag nexus.linkaixin.com:1443/mall/mall-admin:1.0-SNAPSHOT from mall/mall-admin:1.0-SNAPSHOT
[INFO] Pushing nexus.linkaixin.com:1443/mall/mall-admin:1.0-SNAPSHOT
The push refers to repository [nexus.linkaixin.com:1443/mall/mall-admin]
e595cf98d1ac: Layer already exists
27e730ca5883: Layer already exists
70eee88b4bab: Layer already exists
4e2f9475b031: Layer already exists
10beb411784d: Layer already exists
aa0369d6605f: Layer already exists
612d6b123925: Layer already exists
36d9b4d72ec4: Layer already exists
1de5d7cd5bd1: Layer already exists
b845f393fc2b: Layer already exists
dbc783c89851: Layer already exists
7bff100f35cb: Layer already exists
1.0-SNAPSHOT: digest: sha256:2d07d5530edcd6436c28068b7c36b78132e49859c2ba4bd78206ed50cdc595d1 size: 2826

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