史上最全部署Nexus

一、什么是Maven私服

​私服是指私有服务器，是架设在局域网的一种特殊的远程仓库，目的是代理远程仓库及部署第三方构建。有了私服之后，当 Maven 需要下载构件时，直接请求私服，私服上存在则下载到本地仓库；否则，私服请求外部的远程仓库，将构件下载到私服，再提供给本地仓库下载
​

二、Maven安装

1.下载地址

http://maven.apache.org/download.cgi

2. 服务器安装jdk环境

一定要按照Jdk而不是jre

yum install java-1.8.0-openjdk-devel.x86_64

参考：https://www.cnblogs.com/yaun1498078591/p/10368884.html

3.安装Maven

3.安装Maven
[root@localhost ~]# cd /data/tools/maven
[root@localhost src]# wget https://mirrors.tuna.tsinghua.edu.cn/apache/maven/maven-3/3.8.1/binaries/apache-maven-3.8.1-bin.tar.gz
[root@localhost src]# tar -zxvf apache-maven-3.8.1-bin.tar.gz

4.配置系统环境变量

[root@localhost jvm]# vim /etc/profile
export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.292.b10-2.el8.x86_64
export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/bin

export MAVEN_HOME=/data/tools/maven/apache-maven-3.8.1
export PATH=$PATH:$MAVEN_HOME/bin
[root@localhost jvm]# source /etc/profile

5.验证Maven是否安装成功

执行命令:mvn -v
Apache Maven 3.8.1 (05c21c65bdfed0f71a2f2ada8b84da59348c4c5d)
Maven home: /data/tools/maven/apache-maven-3.8.1
Java version: 1.8.0_292, vendor: Red Hat, Inc., runtime: /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.292.b10-2.el8.x86_64/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "4.18.0-301.1.el8.x86_64", arch: "amd64", family: "unix"

三、安装Nexus

1.下载地址

https://www.sonatype.com/download-oss-sonatype

2. 源码安装

[root@localhost jvm]# cd /data/tools/maven/
[root@localhost src]# wget https://sonatype-download.global.ssl.fastly.net/nexus/3/nexus-3.11.0-01-unix.tar.gz
[root@localhost src]# tar -zxvf nexus-3.11.0-01-unix.tar.gz
[root@localhost src]# mv nexus-3.11.0-01 /usr/local/nexus

3. 启动nexus

默认端口8081，如果要修改端口可以在etc/nexus-default.properties配置中修改
启动：

[root@localhost src]# /data/tools/maven/nexus-3.11.0-01/bin/nexus start
WARNING: ************************************************************
WARNING: Detected execution as "root" user.  This is NOT recommended!
 WARNING: ************************************************************
 Starting nexus

上面在启动过程中出现警告：不推荐使用root用户启动，创个新用户就行。这个警告不影响nexus的正常访问和使用。

4. 开放8081端口

[root@localhost src]# firewall-cmd --add-port=8081/tcp --permanent
success
[root@localhost src]# firewall-cmd --reload
success

​

5. 浏览器访问

这就把nexus服务搭建好了，默认管理员账号密码是admin/admin123
​

参考链接：https://my.oschina.net/u/2963821/blog/1806035

三、项目中配置使用

1.在开发代码电脑配置maven

本地写代码电脑的maven配置settings.xml 配置如下:

<servers>    
      <server>
        <id>usr-releases</id>
        <username>admin</username>
        <password>admin123</password>
      </server>
      <server>
          <id>usr-snapshots</id>
          <username>admin</username>
          <password>admin123</password>
      </server>   
 </servers>
 
 ......
<profiles> 
   <profile>
      <id>usr-private-repo</id>
      <repositories>
          <repository>
              <id>usr-releases</id>
              <url>http://192.168.0.80:9001/repository/maven-releases/</url>
              <releases>
                  <enabled>true</enabled>
              </releases>
              <snapshots>
                <enabled>false</enabled>
              </snapshots>
          </repository>
          <repository>
              <id>usr-snapshots</id>
              <url>http://192.168.0.80:9001/repository/maven-snapshots/</url>
              <releases>
                  <enabled>false</enabled>
              </releases>
              <snapshots>
                <enabled>true</enabled>
                <updatePolicy>always</updatePolicy>
              </snapshots>
          </repository>
      </repositories>
    </profile>
</profiles>  

......

<activeProfiles>
    <activeProfile>usr-private-repo</activeProfile>
</activeProfiles>

2.在项目的Pom文件配置distributionManagement，deploy时这样才能将打的jar包上传到私服

<distributionManagement>
        <!--pom.xml这里<id> 和 settings.xml 配置 <id> 对应  -->
        <repository>
            <id>usr-releases</id>
            <url>http://192.168.0.80:9001/repository/maven-releases/</url>
        </repository>
        <snapshotRepository>
            <id>usr-snapshots</id>
            <url>http://192.168.0.80:9001/repository/maven-snapshots/</url>
        </snapshotRepository>
</distributionManagement>