CentOS 7 下安装和配置 Sonatype Nexus 3

原文地址：http://blog.sina.com.cn/s/blog_704836f40102x06j.html

稍稍做了一点修改。

前言

CentOS 7 下安装 Sonatype Nexus OSS 3.3 ，因为 3.1 以后，相比 3.0 配置文件发生了一些变化，记录一下大致的安装和配置过程。

Sonatype Nexus 一直是 Maven 仓库管理工具，Nexus 3.1 之后新增了很多功能。

安装参考 How To Install Latest Sonatype Nexus 3 On Linux

配置参考 Configuration and Data Directory Changes for Nexus Repository Manager 3.1.0

本例操作系统为 CentOS 7，命令基本一致。

环境说明

CentOS 7（Minimal Install）

安装和配置步骤

1.更新系统

$ sudo yum update

版本如下

$ cat /etc/redhat-release

CentOS Linux release 7.3.1611 (Core)

2.安装 JDK 1.8

$ curl -L -C - -b "oraclelicense=accept-securebackup-cookie" -O http://download.oracle.com/otn-pub/java/jdk/8u151-b12/e758a0de34e24606bca991d704f6dcbf/jdk-8u151-linux-x64.rpm

$ sudo yum localinstall jdk-8u151-linux-x64.rpm

检验一下

$ java -version

java version "1.8.0_151"

SE Runtime Environment (build 1.8.0_151-b12)

Java HotSpot(TM) 64-Bit Server VM (build 25.151-b12, mixed mode)

3.创建目录，并且 cd 进入这个目录

$ cd /opt

4.下载 Sonatype Nexus OSS 3（请根据实际情况下载最新版本）

$ sudo curl -O https://sonatype-download.global.ssl.fastly.net/nexus/3/nexus-3.3.1-01-unix.tar.gz

5.解压

$ sudo tar -xzvf nexus-3.3.1-01-unix.tar.gz

6.创建链接

$ sudo ln -s nexus-3.3.1-01 nexus

7.创建 nexus 用户

$ sudo useradd nexus -M -s /sbin/nologin

8.授权

$ sudo chown -R nexus:nexus /opt/nexus

$ sudo chown -R nexus:nexus /opt/sonatype-work/

9.打开 /opt/nexus/bin/nexus.rc 文件, 去掉 run_as_user 变量的注释

$ sudo vi /opt/nexus/bin/nexus.rc

run_as_user="nexus"

10.设置环境变量
~/.bashrc添加NEXUS_HOME
NEXUS_HOME=/opt/nexus

10.安装服务(本例以 systemd 为例)

创建服务文件

$ sudo vi /etc/systemd/system/nexus.service

添加如下内容

[Unit]

Description=nexus service

After=network.target

[Service]

Type=forking

LimitNOFILE=65536

ExecStart=/opt/nexus/bin/nexus start

ExecStop=/opt/nexus/bin/nexus stop

User=nexus

Restart=on-abort

[Install]

WantedBy=multi-user.target

其中LimitNOFILE=65536用于调整文件描述符数量。

安装并启动服务

$ sudo systemctl daemon-reload

$ sudo systemctl enable nexus

$ sudo systemctl start nexus

11.查看服务

$ sudo systemctl status nexus

12.添加防火墙规则

$ sudo firewall-cmd --zone=public --permanent --add-port=8081/tcp

$ sudo firewall-cmd --reload

13.访问测试

访问地址： http://ip:8081/

访问凭证(默认的用户名和密码)：

username: admin

password: admin123

14.更改 nexus 的 context path

如需修改路径，编辑 /opt/sonatype-work/nexus3/etc/nexus.properties 文件即可

$ sudo vi /opt/nexus/nexus/etc/nexus.properties

nexus-context-path=/nexus

重启服务

$ sudo systemctl restart nexus

访问测试

地址 http://ip:8081/nexus

结束语

本例安装和配置 Sonatype Nexus 3.3，步骤比较简单。但是版本更新还是个问题，因为每次都手动安装就比较费时了，如果能 yum 安装就比较方便了。

参考资料

How To Install Latest Sonatype Nexus 3 On Linux

Nexus Repository OSS Server Installation

Configuration and Data Directory Changes for Nexus Repository Manager 3.1.0

Chapter 2. Installation and Running



问题：
https://www.cnblogs.com/sunilsun/p/5718306.html

1.nexus需要安装Jdk才能运行

打开 /opt/nexus/bin/nexus

将INSTALL4J_JAVA_HOME_OVERRIDE前面的#去掉，并添加自己的Java目录
该INSTALL4J_JAVA_HOME_配置仅仅针对命令行启动nexus才起作用，当nexus作为服务启动时，该配置不起作用，服务搜索jvm的路径是基本nexus启动文件中的common_jvm_locations设置的路径来查找的。

# Uncomment the following line to override the JVM search sequence
# when nexus start as a service, the below java home setting is invalid as it only follows the common_jvm_locations settings below.

# INSTALL4J_JAVA_HOME_OVERRIDE only take effect when nexus is started by command instead of service
INSTALL4J_JAVA_HOME_OVERRIDE=/opt/java

2.服务启动失败

Jobfornexus.service failed because the control process exited with error code. See"systemctl status nexus.service"and"journalctl -xe"fordetails.

$ journalctl -xe

Apr1910:35:32ubuntu nexus[3252]: No suitable Java Virtual Machine could be found on your system.
Apr 1910:35:32ubuntu nexus[3252]: The version of the JVM must be at least1.8and at most1.8.Apr 1910:35:32ubuntu nexus[3252]: Please define INSTALL4J_JAVA_HOME to point to a suitable JVM.
Apr 1910:35:32ubuntu systemd[1]: nexus.service: Control process exited, code=exited status=83Apr 1910:35:32ubuntu systemd[1]: Failed to start nexus service.

提示找不到JVM，上文配置的INSTALL4J_JAVA_HOME_OVERRIDE在服务启动模式下不启作用，暂不清楚原因。

查找nexus中JVM查找路径如下

common_jvm_locations="/opt/i4j_jres/* /usr/local/i4j_jres/* $HOME/.i4j_jres/* /usr/bin/java* /usr/bin/jdk* /usr/bin/jre* /usr/bin/j2*re* /usr/bin/j2sdk* /usr/java* /usr/java*/jre /usr/jdk* /usr/jre* /usr/j2*re* /usr/j2sdk* /usr/java/j2*re* /usr/java/j2sdk* /opt/java* /usr/java/jdk* /usr/java/jre* /usr/lib/java/jre /usr/local/java* /usr/local/jdk* /usr/local/jre* /usr/local/j2*re* /usr/local/j2sdk* /usr/jdk/java* /usr/jdk/jdk* /usr/jdk/jre* /usr/jdk/j2*re* /usr/jdk/j2sdk* /usr/lib/jvm/* /usr/lib/java* /usr/lib/jdk* /usr/lib/jre* /usr/lib/j2*re* /usr/lib/j2sdk* /System/Library/Frameworks/JavaVM.framework/Versions/1.?/Home /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin/Contents/Home /Library/Java/JavaVirtualMachines/*.jdk/Contents/Home/jre"

笔者原JAVA_HOME位于/usr/lib/jdk/jdk1.8.0_74,多了一层

$sudomv/usr/lib/jdk/jdk1.8.0_74/ /usr/local/java/

同时修改JAVA_HOME

$ nano ~/.profile

$ source ~/.profile

$ java -version

重新启动