前言
系统环境：Centos7、jdk1.8
私服是一种特殊的远程仓库，它是架设在局域网内的仓库服务，私服代理广域网上的远程仓库，供局域网内的用户使用。当Maven需要下载构件的时候，它从私服请求，如果 私服上不存在该构件，则从外部远程仓库下载，缓存在私服上之后，再为Maven的下载请求提供服务。
安装
一、安装maven 3.6.1
1. 下载maven
1 # wget下载maven3.6.1 2 [root@localhost home]#wget http://mirrors.tuna.tsinghua.edu.cn/apache/maven/maven-3/3.6.1/binaries/apache-maven-3.6.1-bin.tar.gz20 21 # 解压maven 22 [root@localhost home]# tar -zxvf apache-maven-3.6.1-bin.tar.gz 27 28 # 重命名maven 29 [root@localhost home]# mv apache-maven-3.6.1 maven
2.设置maven环境变量
1 # 修改环境变量增加maven 2 [root@localhost home]# vi /etc/profile 3 4 export MAVEN_HOME=/home/maven 5 export PATH=$MAVEN_HOME/bin:$PATH 6 7 # 重载生效 8 [root@localhost home]# source /etc/profile
3.验证maven
1 [root@localhost home]# mvn -v 2 Apache Maven 3.6.1 (d66c9c0b3152b2e69ee9bac180bb8fcc8e6af555; 2019-04-05T03:00:29+08:00) 3 Maven home: /home/maven 4 Java version: 1.8.0_221, vendor: Oracle Corporation, runtime: /home/jdk/jre 5 Default locale: zh_CN, platform encoding: UTF-8 6 OS name: "linux", version: "3.10.0-957.27.2.el7.x86_64", arch: "amd64", family: "unix"
二、安装Nexus3.11.0 maven私服
1.下载
1 # wget下载nexus的tar包 2 [root@localhost home]# wget http://sonatype-download.global.ssl.fastly.net/nexus/3/nexus-3.6.0-02-unix.tar.gz 3 4 # 解压 5 [root@localhost home]# tar -C nexus -zxvf nexus-3.6.0-02-unix.tar.gz
1 [root@localhost home]# cd nexus 2 [root@localhost nexus]# ls 3 nexus-3.6.0-02 sonatype-work 4 [root@localhost nexus]# mv nexus-3.6.0-02/ nexus 5 6 [root@localhost nexus]# ls -l 7 总用量 0 8 drwxr-xr-x. 9 root root 136 9月 19 13:11 nexus 9 drwxr-xr-x. 3 root root 20 9月 19 13:11 sonatype-work
2.修改nexus端口号
修改etc目录下nexus-default.properties文件
3.修改maven运行jvm
修改bin目录下的nexus.vmoptions文件
4.启动私服
1 [root@localhost bin]# pwd 2 /home/nexus/nexus/bin 3 [root@localhost bin]# ./nexus start 4 WARNING: ************************************************************ 5 WARNING: Detected execution as "root" user. This is NOT recommended! 6 WARNING: ************************************************************ 7 Starting nexus
此处警告：可以useradd nexus，然后chown -R nexus:nexus /home/nexus 然后重启nexus解决
nexus start|stop|status|restart
5.浏览器打开http://192.168.8.10:8002/访问，默认密码admin/admin123。nexus启动很慢，耐心等待。
登录发现警告“System Requirement: max file descriptors [4096] likely too low, increase to at least [65536].”
解决： vi /etc/security/limits.conf
在文件末尾增加
* soft nofile 65536
* hard nofile 65536
* soft nproc 4096
* hard nproc 4096
重启nexus解决。
6.创建java仓库
这里选择 maven2（hosted）
maven配置：修改maven的settings.xml配置文件
<!--nexus服务器-->
<servers>
<server>
<id>releases</id>
<username>admin</username>
<password>admin123</password>
</server>
<server>
<id>Snapshots</id>
<username>admin</username>
<password>admin123</password>
</server>
</servers> <!--组资源库的url地址 id和name自定义，mirrorOf的值设置为central，写死的--> <mirrors>
<!--
#后续测试增加maven私服的配置后，无法拉取官方的jar包，注释掉解决问题 <mirror> <id>nexus</id> <name>java</name> <url>http://192.168.8.10:8002/repository/java/</url> <mirrorOf>central</mirrorOf> </mirror>
-->
<mirror>
<id>alimaven</id>
<name>aliyun maven</name>
<url>http://maven.aliyun.com/nexus/content/groups/public/</url>
<mirrorOf>central</mirrorOf>
</mirror>
</mirrors>
<profiles> <profile> <id>jdk-1.8</id> <activation> <activeByDefault>true</activeByDefault> <jdk>1.8</jdk> </activation> <properties> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> <maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion> </properties> </profile> <profile> <id>nexus-java</id> <!-- 远程仓库列表 --> <repositories> <repository> <id>java</id> <name>Nexus Central</name> <!-- 虚拟的URL形式,指向镜像的URL--> <url>http://192.168.8.10:8002/repository/java/</url> <layout>default</layout> <!-- 表示可以从这个仓库下载releases版本的构件--> <releases> <enabled>true</enabled> </releases> <!-- 表示可以从这个仓库下载snapshot版本的构件 --> <snapshots> <enabled>true</enabled> </snapshots> </repository> </repositories> <!-- 插件仓库列表 --> <pluginRepositories> <pluginRepository> <id>java</id> <name>Nexus Central</name> <url>http://192.168.8.10:8002/repository/java/</url> <layout>default</layout> <snapshots> <enabled>true</enabled> </snapshots> <releases> <enabled>true</enabled> </releases> </pluginRepository> </pluginRepositories> </profile> </profiles> <activeProfiles> <!--需要激活 <profile>中的ID才生效--> <activeProfile>nexus-java</activeProfile> <activeProfile>jdk-1.8</activeProfile> </activeProfiles> <!-- activeProfiles | List of profiles that are active for all builds. | <activeProfiles> <activeProfile>alwaysActiveProfile</activeProfile> <activeProfile>anotherAlwaysActiveProfile</activeProfile> </activeProfiles>
maven私服其他仓库建立及调用过程请参考：https://www.cnblogs.com/kongweifeng/p/9369936.html
常见错误问题：
1.未认证或认证失败：错误码401
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-deploy-plugin:2.8.2:deploy (default-deploy) on project mingbytesiteapi: Failed to deploy artifacts: Could not transfer artifact cc.mrbird:mingbytesiteapi:jar:1.0.0 from/to releases (http://192.168.8.101:8002/repository/java/): Failed to transfer file http://192.168.8.10:8002/repository/java/cc/mrbird/mingbytesiteapi/1.0.0/mingbytesiteapi-1.0.0.jar with status code 401 -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException1
解决：maven的setting.xml配置文件中的server username和password未配置或者配置不正确
<server> <id>releases</id> <username>admin</username> <password>admin123</password> </server> <server> <id>Snapshots</id> <username>admin</username> <password>admin123</password> </server>