关闭selinux，不然nginx的反向代理会报错connect() to 127.0.0.1:8080 failed (13: Permission denied) while connecting to upstream，或者使用这个命令：
setsebool -P httpd_can_network_connect 1
关闭selinux：
修改/etc/selinux/config 文件
将SELINUX=enforcing改为SELINUX=disabled
reboot
首先安装jdk
yum install java java-devel，如果直接yum install java会自动找到相应的包的，我这里安装的是openjdk的1.7.0版本，目录可以自己看到。
配置java环境变量：
vim /etc/profile
export JAVA_HOME=/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.99-2.6.5.0.el7_2.x86_64
export JRE_HOME=$JAVA_HOME/jre
export CLASSPATH=$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH
export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH
然后source /etc/profile
javac有输出说明安装成功
安装mysql，请看http://www.cnblogs.com/juandx/p/5208613.html
然后给gerrit建一个库，并且授权
mysql> create database gerritdb; Query OK, 1 row affected (0.00 sec)mysql> GRANT ALL PRIVILEGES ON gerritdb.* TO 'gerrituser'@'localhost' IDENTIFIED BY 'gerritpass'; Query OK, 0 rows affected (0.00 sec)mysql> GRANT ALL PRIVILEGES ON gerritdb.* TO 'gerrituser'@'%' IDENTIFIED BY 'gerritpass';
下载gerrit的java包https://www.gerritcodereview.com/download/gerrit-2.12.2.war
然后安装就行啦，这里会提示你很多选择
[gerrit@gerrit ~]$ java -jar gerrit-2.12.2.war init -d review_site Using secure store: com.google.gerrit.server.securestore.DefaultSecureStore*** Gerrit Code Review 2.12.2 *** *** Git Repositories *** Location of Git repositories [/home/gerrit/git]: 这里一定要写git放的目录，没有的话自己会创建的*** SQL Database *** Database server type [mysql]: db这个不用说吧 Server hostname [localhost]: Server port [(mysql default)]: Database name [gerritdb]: Database username [gerrituser]: Change gerrituser's password [y/N]? *** Index *** Type [LUCENE/?]: 默认就好，直接回车The index must be rebuilt before starting Gerrit:java -jar gerrit.war reindex -d site_path*** User Authentication *** Authentication method [HTTP/?]: 一定要写http，不然就不是反向代理了，写development_become_any_account就随意登陆了 Get username from custom HTTP header [Y/n]? n 一定要n，不然反向代理gerrit报错为缺少一个y的header SSO logout URL : Enable signed push support [y/N]? n*** Email Delivery *** SMTP server hostname [smtp.163.com]: 25端口是163的smtp SMTP server port [25]: SMTP encryption [NONE/?]: SMTP username [littlexiaowen@163.com]: Change littlexiaowen@163.com's password [y/N]? *** Container Process *** Run as [gerrit]: 这是用户，root也可以 Java runtime [/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.99-2.6.5.0.el7_2.x86_64/jre]: Upgrade review_site/bin/gerrit.war [Y/n]? y Copying gerrit-2.12.2.war to review_site/bin/gerrit.war*** SSH Daemon *** Listen on address [*]: Listen on port [29418]: *** HTTP Daemon *** Behind reverse proxy [Y/n]? y Proxy uses SSL (https://) [y/N]? n Subdirectory on proxy server [/]: Listen on address [127.0.0.1]: Listen on port [8081]: Canonical URL [http://gerrit.wenbin.com]: *** Plugins *** Installing plugins. Install plugin singleusergroup version v2.12.2 [Y/n]? y version v2.12.2 is already installed, overwrite it [Y/n]? y Install plugin commit-message-length-validator version v2.12.2 [Y/n]? y version v2.12.2 is already installed, overwrite it [Y/n]? y Install plugin reviewnotes version v2.12.2 [Y/n]? y version v2.12.2 is already installed, overwrite it [Y/n]? y Install plugin replication version v2.12.2 [Y/n]? y version v2.12.2 is already installed, overwrite it [Y/n]? y Install plugin download-commands version v2.12.2 [Y/n]? y version v2.12.2 is already installed, overwrite it [Y/n]? y Initializing plugins. No plugins found with init steps.Initialized /home/gerrit/review_site [gerrit@gerrit ~]$ vim review_site/etc/gerrit.config [gerrit@gerrit ~]$ vim sshd_log ^C [gerrit@gerrit ~]$ ./review_site/bin/gerrit.sh restart Stopping Gerrit Code Review: OK Starting Gerrit Code Review: OK [gerrit@gerrit ~]$
没办法，报错了很多，遇到了很多问题，但是也知道了反向代理的原理，httpd和nginx的设置，知道了原来nginx这么好用， 并发量还这么好，以后要多多了解，单线程解决并发速度更快，算法很好，错的越多学的越多吧,一定要多看log啊
/review_gerrit/etc/gerrit.conf
[gerrit]basePath = /home/gerrit/gitcanonicalWebUrl = http://gerrit.wenbin.com
[database]type = mysqlhostname = localhostdatabase = gerritdbusername = gerrituser
[index]type = LUCENE
[auth]type = HTTP
[receive]enableSignedPush = false
[sendemail]smtpServer = smtp.163.comsmtpServerPort = 25smtpUser = littlexiaowen@163.com
from=CodeReview<littlexiaowen@163.com> 这行是自己加的，不然注册的时候会提示失败，这里不用写密码，密码是写在security里的另一个文件里
[container]user = gerritjavaHome = /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.99-2.6.5.0.el7_2.x86_64/jre
[sshd]listenAddress = *:29418
[httpd]listenUrl = proxy-http://127.0.0.1:8081/
[cache]directory = cache
看到网上有一种修改邮件发送方式的方法：ssh ha gerrit set-account --add-email user99@163.com user99，还没有试过
先生存一个http的认证文件，创建admin用户
# htpasswd -c /passwords admin
然后会提示输入密码
安装nginx yum install nginx
/etc/nginx/nginx.conf
...
# for more information.include /etc/nginx/conf.d/*.conf;server {listen 80;server_name gerrit.wenbin.com;root /usr/share/nginx/html;# Load configuration files for the default server block.include /etc/nginx/default.d/*.conf;location / {auth_basic "Gerrit Code Review";auth_basic_user_file /passwords;proxy_pass http://127.0.0.1:8081;proxy_set_header X-Forwarded-For $remote_addr;proxy_set_header Host $host;}error_page 404 /404.html;location = /40x.html {}error_page 500 502 503 504 /50x.html;location = /50x.html {}}
systemctl restart nginx就可以了
如果使用apache，那么yum install httpd，更改配置文件
/etc/httpd/httpd.conf
# Defaults if commented: EnableMMAP On, EnableSendfile Off # #EnableMMAP off EnableSendfile on# Supplemental configuration # # Load config files in the "/etc/httpd/conf.d" directory, if any. IncludeOptional conf.d/*.conf
#增加下面这些 <VirtualHost *:80>ProxyRequests OffProxyVia OffProxyPreserveHost On<Proxy *>Order deny,allowAllow from all</Proxy><Location />AuthType BasicAuthName "Gerrit Code Review"Require valid-userAuthUserFile /passwords</Location>ProxyPass / http://127.0.0.1:8081/ </VirtualHost>
systemctl resatrt httpd
如果nginx报错不能连接到8081端口，可能是selinux没有关
设置开机启动
sudo cp etc/gerrit.config /etc/init.d/gerrit
sudo ln -snf /etc/init.d/gerrit /etc/rc2.d/S90gerrit
sudo ln -snf /etc/init.d/gerrit /etc/rc3.d/S90gerrit
这样就安装成功了，哎。。。遇到的问题是gerrit repository not found: All-Projects，这样是发现没有在第二个回答中写git目录，如果再次出现这个错误，那就先在mysql中drop再create一遍db就好了。。。
在/review_gerrit/bin/gerrit.sh中实际代码第一行加入
GERRIT_SITE=/home/gerrit/review_site
执行/home/gerrit/review_site/bin/gerrit.sh就可以启动gerrit了
这样在浏览器中访问域名或者ip地址就ok了，输入admin的用户名和密码就可以看到界面了。
会提示注册邮箱，自己注册个就行了，
在右上角点击用户，选setting设置ssh-key
在主机上执行 ssh-keygen -C ***@163.com
把公钥放进页面的sshkey
这样就可以了，下面就需要把gitlab，gerrit，jenkins配置起来
