Nexus centos 安装

1、安装nexus
2、启动nexus
3.搭建私服

搭建nexus服务的意义
作为内网的统一代理，团队合作开发时不用每人都去外网下载一次；
解决部分变态公司内网管制无法访问外网的问题，选一台有外网权限的机器搭建服务器，其余人直接内网访问此服务；
团队合作开发时解决maven项目依赖问题；

大家nexus之后使用情形如下图

1、安装nexus

在安装之前兄弟们要搞清楚是环境的jdk版本，兄弟我2018/8/20直接下了最新的版本,结果悲剧，配置到一半，报错，如下：

#高版本要求jdk8以上
[root@227 nexus]# ./bin/nexus console
No suitable Java Virtual Machine could be found on your system.
The version of the JVM must be at least 1.8 and at most 1.8.
Please define INSTALL4J_JAVA_HOME to point to a suitable JVM.

退而求其次nexus-2.11.4-01-bundle.tar.gz

云下载

wget http://sonatype-download.global.ssl.fastly.net/nexus/oss/nexus-2.11.4-01-bundle.tar.gz

wget http://mirrors.cnnic.cn/apache/maven/maven-3/3.0.5/binaries/apache-maven-3.0.5-bin.tar.gz

[root@227 ~]# wget http://sonatype-download.global.ssl.fastly.net/nexus/oss/nexus-2.11.4-01-bundle.tar.gz
--2018-08-20 15:55:29--  http://sonatype-download.global.ssl.fastly.net/nexus/oss/nexus-2.11.4-01-bundle.tar.gz
Resolving sonatype-download.global.ssl.fastly.net... 151.101.73.194
Connecting to sonatype-download.global.ssl.fastly.net|151.101.73.194|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 70938260 (68M) [application/x-gzip]
Saving to: “nexus-2.11.4-01-bundle.tar.gz”

100%[============================================================================>] 70,938,260   121K/s   in 9m 14s  

Last-modified header invalid -- time-stamp ignored.
2018-08-20 16:04:44 (125 KB/s) - “nexus-2.11.4-01-bundle.tar.gz” saved [70938260/70938260]

解压到/usr/local

[root@227 ~]# ll
total 69396
-rw-------. 1 root root     2362 Feb 28 18:39 anaconda-ks.cfg
drwxr-xr-x. 2 root root     4096 Feb 28 10:46 Desktop
drwxr-xr-x. 2 root root     4096 Feb 28 10:46 Documents
drwxr-xr-x. 2 root root     4096 Aug 20 15:41 Downloads
-rw-r--r--. 1 root root    68509 Feb 28 18:39 install.log
-rw-r--r--. 1 root root    11969 Feb 28 18:37 install.log.syslog
drwxr-xr-x. 2 root root     4096 Feb 28 10:46 Music
-rw-r--r--. 1 root root 70938260 Aug 20 16:04 nexus-2.11.4-01-bundle.tar.gz
drwxr-xr-x. 2 root root     4096 Feb 28 10:46 Pictures
drwxr-xr-x. 2 root root     4096 Feb 28 10:46 Public
drwxr-xr-x. 2 root root     4096 Feb 28 10:46 Templates
drwxr-xr-x. 2 root root     4096 Feb 28 10:46 Videos
[root@227 ~]# tar -zxvf nexus-2.11.4-01-bundle.tar.gz -C /usr/local/

注意：

　　一定要解压到这个目录下，具体原因我也不知道，文档里是这么做的，我们也没必要自己找麻烦。

建立软链接
查看/usr/local目录，结果如下：

[root@227 ~]# cd /usr/local/
[root@227 local]# ln -s nexus-2.11.4-01 nexus
[root@227 local]# ll
total 92
drwxr-xr-x.  2 root root  4096 Sep 23  2011 bin
drwxr-xr-x.  2 root root  4096 Sep 23  2011 etc
drwxr-xr-x.  2 root root  4096 Sep 23  2011 games
drwxr-xr-x.  2 root root  4096 Sep 23  2011 include
drwxr-xr-x.  2 root root  4096 Apr 11 15:43 key
drwxr-xr-x.  2 root root  4096 Sep 23  2011 lib
drwxr-xr-x.  2 root root  4096 Sep 23  2011 lib64
drwxr-xr-x.  2 root root  4096 Sep 23  2011 libexec
drwxr-xr-x.  2 root root 32768 Aug 20 00:10 logs
lrwxrwxrwx.  1 root root    15 Aug 20 16:09 nexus -> nexus-2.11.4-01
drwxr-xr-x.  8 root root  4096 Jul 10  2015 nexus-2.11.4-01
drwxr-xr-x. 11 root root  4096 May 21 17:15 nginx
drwxr-xr-x.  2 root root  4096 Apr  4 16:30 RSA-KeyPair
drwxr-xr-x.  2 root root  4096 Sep 23  2011 sbin
drwxr-xr-x.  5 root root  4096 Feb 28 18:29 share
drwxr-xr-x.  4 root root  4096 Jul 10  2015 sonatype-work
drwxr-xr-x.  2 root root  4096 Sep 23  2011 src

设置环境变量（按官网文档的说法是可选，不过还是配上吧）

[root@227 local]# vim /etc/profile

unset i
unset -f pathmunge
JAVA_HOME=/usr/jdk1.7.0_79
JRE_HOME=$JAVA_HOME/jre
CLASSPATH=.:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar
PATH=$JAVA_HOME/bin:$PATH
export JAVA_HOME JRE_HOME CLASSPATH PATH
export NEXUS_HOME=/usr/local/nexus-2.11.4-01

[root@227 local]#

[root@227 local]# source /etc/profile
[root@227 local]# echo $NEXUS_HOME
/usr/local/nexus-2.11.4-01

2、启动nexus

2.1启动服务器

　　前台启动：好了，我们来前台启动一下。咦，没起来，提示：

[root@227 local]# cd /usr/local/nexus
[root@227 nexus]# ./bin/nexus console
****************************************
WARNING - NOT RECOMMENDED TO RUN AS ROOT
****************************************
If you insist running as root, then set the environment variable RUN_AS_USER=root before running this script.
[root@227 nexus]# vim /etc/profile
#结尾加上 export RUN_AS_USER=root
[root@227 nexus]# source /etc/profile

[root@227 nexus]# ./bin/nexus console
#运行结果如下
wrapper  | Launching a JVM...
jvm 1    | Wrapper (Version 3.2.3) http://wrapper.tanukisoftware.org
jvm 1    |   Copyright 1999-2006 Tanuki Software, Inc.  All Rights Reserved.
jvm 1    | 
jvm 1    | 2018-08-20 16:15:57,678+0800 INFO  [WrapperListener_start_runner] *SYSTEM org.sonatype.nexus.bootstrap.jsw.JswLauncher - Starting with arguments: [./conf/jetty.xml, ./conf/jetty-requestlog.xml]
jvm 1    | 2018-08-20 16:15:57,682+0800 INFO  [WrapperListener_start_runner] *SYSTEM org.sonatype.nexus.bootstrap.jsw.JswLauncher - JVM ID: 1, JVM PID: 16148, Wrapper PID: 16146, User: root
jvm 1    | 2018-08-20 16:15:57,699+0800 INFO  [WrapperListener_start_runner] *SYSTEM org.sonatype.nexus.bootstrap.ConfigurationBuilder - Properties:
jvm 1    | 2018-08-20 16:15:57,700+0800 INFO  [WrapperListener_start_runner] *SYSTEM org.sonatype.nexus.bootstrap.ConfigurationBuilder -   application-conf='/usr/local/nexus-2.11.4-01/../sonatype-work/nexus/conf'
jvm 1    | 2018-08-20 16:15:57,700+0800 INFO  [WrapperListener_start_runner] *SYSTEM org.sonatype.nexus.bootstrap.ConfigurationBuilder -   application-host='0.0.0.0'
jvm 1    | 2018-08-20 16:15:57,700+0800 INFO  [WrapperListener_start_runner] *SYSTEM org.sonatype.nexus.bootstrap.ConfigurationBuilder -   application-port='8081'
jvm 1    | 2018-08-20 16:15:57,700+0800 INFO  [WrapperListener_start_runner] *SYSTEM org.sonatype.nexus.bootstrap.ConfigurationBuilder -   bundleBasedir='/usr/local/nexus-2.11.4-01'
jvm 1    | 2018-08-20 16:15:57,700+0800 INFO  [WrapperListener_start_runner] *SYSTEM org.sonatype.nexus.bootstrap.ConfigurationBuilder -   java.awt.headless='true'
jvm 1    | 2018-08-20 16:15:57,700+0800 INFO  [WrapperListener_start_runner] *SYSTEM org.sonatype.nexus.bootstrap.ConfigurationBuilder -   networkaddress.cache.ttl='3600'
jvm 1    | 2018-08-20 16:15:57,700+0800 INFO  [WrapperListener_start_runner] *SYSTEM org.sonatype.nexus.bootstrap.ConfigurationBuilder -   nexus-app='/usr/local/nexus-2.11.4-01/nexus/WEB-INF'
jvm 1    | 2018-08-20 16:15:57,700+0800 INFO  [WrapperListener_start_runner] *SYSTEM org.sonatype.nexus.bootstrap.ConfigurationBuilder -   nexus-webapp='/usr/local/nexus-2.11.4-01/nexus'
jvm 1    | 2018-08-20 16:15:57,700+0800 INFO  [WrapperListener_start_runner] *SYSTEM org.sonatype.nexus.bootstrap.ConfigurationBuilder -   nexus-webapp-context-path='/nexus'
jvm 1    | 2018-08-20 16:15:57,700+0800 INFO  [WrapperListener_start_runner] *SYSTEM org.sonatype.nexus.bootstrap.ConfigurationBuilder -   nexus-work='/usr/local/sonatype-work/nexus'
jvm 1    | 2018-08-20 16:15:57,700+0800 INFO  [WrapperListener_start_runner] *SYSTEM org.sonatype.nexus.bootstrap.ConfigurationBuilder -   org.eclipse.ecf.provider.filetransfer.retrieve.readTimeout='30000'
jvm 1    | 2018-08-20 16:15:57,700+0800 INFO  [WrapperListener_start_runner] *SYSTEM org.sonatype.nexus.bootstrap.ConfigurationBuilder -   runtime='/usr/local/nexus-2.11.4-01/nexus/WEB-INF'
jvm 1    | 2018-08-20 16:15:57,700+0800 INFO  [WrapperListener_start_runner] *SYSTEM org.sonatype.nexus.bootstrap.ConfigurationBuilder -   security-xml-file='/usr/local/nexus-2.11.4-01/../sonatype-work/nexus/conf/security.xml'
jvm 1    | 2018-08-20 16:15:57,701+0800 INFO  [WrapperListener_start_runner] *SYSTEM org.sonatype.nexus.bootstrap.Launcher - Java: 1.7.0_79, Java HotSpot(TM) 64-Bit Server VM, Oracle Corporation, 24.79-b02
jvm 1    | 2018-08-20 16:15:57,701+0800 INFO  [WrapperListener_start_runner] *SYSTEM org.sonatype.nexus.bootstrap.Launcher - OS: Linux, 2.6.32-431.el6.x86_64, amd64
jvm 1    | 2018-08-20 16:15:57,701+0800 INFO  [WrapperListener_start_runner] *SYSTEM org.sonatype.nexus.bootstrap.Launcher - User: root, en, /root
jvm 1    | 2018-08-20 16:15:57,701+0800 INFO  [WrapperListener_start_runner] *SYSTEM org.sonatype.nexus.bootstrap.Launcher - CWD: /usr/local/nexus-2.11.4-01
jvm 1    | 2018-08-20 16:15:57,711+0800 INFO  [WrapperListener_start_runner] *SYSTEM org.sonatype.nexus.bootstrap.Launcher - TMP: /usr/local/nexus-2.11.4-01/tmp
jvm 1    | 2018-08-20 16:15:57,713+0800 INFO  [WrapperListener_start_runner] *SYSTEM org.sonatype.nexus.bootstrap.jetty.JettyServer - Starting

2.2以后台进程启动：

[root@227 ~]# cd /usr/local/nexus
######################后台启动命令################################

[root@227 nexus]# ./bin/nexus start
****************************************
WARNING - NOT RECOMMENDED TO RUN AS ROOT
****************************************
Starting Nexus OSS...
Started Nexus OSS.

[root@227 nexus]# ./bin/nexus stop
****************************************
WARNING - NOT RECOMMENDED TO RUN AS ROOT
****************************************
Stopping Nexus OSS...
Stopped Nexus OSS.

######################查看日志################################
[root@227 nexus]# tail -f logs/wrapper.log
jvm 1    | 2018-08-21 09:10:12,782+0800 INFO  [RepositoryStatusChecker-central] *SYSTEM org.sonatype.nexus.proxy.maven.maven2.M2Repository-central - Next attempt to auto-unblock the "Central" (id=central) repository by checking its remote peer health will occur in 40 seconds.
jvm 1    | 2018-08-21 09:10:18,206+0800 INFO  [qtp1235955620-81] *SYSTEM org.apache.shiro.nexus5727.FixedDefaultWebSessionManager - Global session timeout: 1800000 ms
jvm 1    | 2018-08-21 09:10:18,207+0800 INFO  [qtp1235955620-81] *SYSTEM org.apache.shiro.session.mgt.AbstractValidatingSessionManager - Enabling session validation scheduler...
jvm 1    | 2018-08-21 09:10:18,208+0800 INFO  [qtp1235955620-81] *SYSTEM org.apache.shiro.cache.ehcache.EhCacheManager - Using existing EHCache named [shiro-activeSessionCache]
jvm 1    | 2018-08-21 09:10:18,264+0800 INFO  [qtp1235955620-81] admin org.sonatype.nexus.velocity.VelocityEngineProvider - Creating Nexus VelocityEngine
jvm 1    | 2018-08-21 09:10:18,869+0800 INFO  [qtp1235955620-81] admin /nexus - nexus: [Noelios Restlet Engine] - Attaching application: org.sonatype.nexus.rest.NexusApplication@228da80f to URI: /nexus/service/local
jvm 1    | 2018-08-21 09:10:18,894+0800 INFO  [qtp1235955620-87] admin org.sonatype.security.model.source.FileModelConfigurationSource - Loading security configuration from: /usr/local/nexus-2.11.4-01/../sonatype-work/nexus/conf/security.xml
jvm 1    | 2018-08-21 09:10:19,243+0800 INFO  [proxy-3-thread-1] admin org.sonatype.nexus.proxy.storage.remote.httpclient.HttpClientRemoteStorage - Initializing remote transport for proxy repository "Apache Snapshots" [id=apache-snapshots]...
jvm 1    | 2018-08-21 09:10:52,665+0800 INFO  [RepositoryStatusChecker-codehaus-snapshots] *SYSTEM org.sonatype.nexus.proxy.maven.maven2.M2Repository-codehaus-snapshots - Next attempt to auto-unblock the "Codehaus Snapshots" (id=codehaus-snapshots) repository by checking its remote peer health will occur in 1 minute 20 seconds.
jvm 1    | 2018-08-21 09:10:52,783+0800 INFO  [RepositoryStatusChecker-central] *SYSTEM org.sonatype.nexus.proxy.maven.maven2.M2Repository-central - Next attempt to auto-unblock the "Central" (id=central) repository by checking its remote peer health will occur in 1 minute 20 seconds.

2.3web访问

好了，我们在浏览器上看看能不能访问吧，路径：

http://192.168.1.227（换成你的ip）:8081/nexus.

结果如图所示：

点击右上角登录：

默认用户名为admin，密码admin123

3.搭建私服

3.1 界面元素介绍

登录后，点击左侧Repositories，界面如上图所示。

右侧的列表中，可以看到nexus预设的几个仓库。

第一个public Repositories，类型为group，这个简单理解为仓库的集合，下面的仓库就是可以加入到这个集合的元素。

对外可以只提供一个单独的url，如上图显示为：http://192.168.1.227:8081/nexus/content/groups/public/

大部分的终端用户，只需要配置上面这一个单独的聚合后的url，而不用单独配置多个仓库。用户也不需要知道某个jar包具体来源于maven 中央仓库，或者是Apache Snapshots，或者是我们自己添加的其他仓库。

这样的好处在于：如果我们要新增某个仓库（如开源中国、阿里云），客户端不需要做任何更改，只需要在nexus上将要新增的仓库加入到对外提供服务的仓库 group中就可以。

第二个3rd party，与倒数第一个和第二个仓库，Releases和Snapshots一样，类型为hosted，意思是由nexus本机管理的仓库。该仓库用于商业化的，第三方提供的非开源的依赖仓库，如oracle jdbc driver。

倒数第二个Releases，用于存放开发团队内部用的正式版的依赖。

倒数第一个Snapshots，用于存放开发团队内部日常构建的频率更新较快的依赖包。

Apache Snapshots和Central类型都是proxy，意思是远端仓库的代理。前者包含了Apache Software Foundation 发布的快照版本（这么翻译不知道对不对），后者为Maven中央仓库，我们平时maven默认就是连接该仓库。

Central M1 Shadow类型为virtual，按官方文档的意思是，只是已有仓库的一个不同呈现方式的映射。有需要可以参考官方手册6.2.3节。

3.2 仓库集合的界面

点击Configuration，可以看到当前添加到该集合的仓库列表及顺序（优先级高的在上面，可用鼠标拖拽），当我们新增了仓库，将会出现在右侧的available Repository，添加到左边即可。

如果有哪个仓库不想加入到该集合，也可以拖拽到右边来。

3.3使用本地maven客户端测试nexus是否成功部署

首先复制仓库集合的repository url，客户端配置需要用到。

配置maven客户端：

打开settings.xml，按照如下步骤修改：

<mirrors>
    <mirror>
    <!--This sends everything else to /public -->
    <id>nexus</id>
    <mirrorOf>*</mirrorOf>
    <url>http://192.168.1.227:8081/nexus/content/groups/public</url>
    </mirror>
</mirrors>

<profiles>
    <profile>
      <id>nexus</id>
      <!--Enable snapshots for the built in central repo to direct -->
      <!--all requests to nexus via the mirror -->
      <repositories>
        <repository>
          <id>central</id>
          <url>http://central</url>
          <releases><enabled>true</enabled></releases>
          <snapshots><enabled>true</enabled></snapshots>
        </repository>
      </repositories>
      <pluginRepositories>
        <pluginRepository>
          <id>central</id>
          <url>http://central</url>
          <releases><enabled>true</enabled></releases>
          <snapshots><enabled>true</enabled></snapshots>
        </pluginRepository>
      </pluginRepositories>
    </profile>
  </profiles>
  <activeProfiles>
    <activeProfile>nexus</activeProfile>
  </activeProfiles>

接下来在ide中测试下（我个人用maven命令行不多，不熟悉，还是用intelj idea演示吧）

在idea中依次打开File--Settings--搜索Maven--出现如下界面：