一、下载gitlab软件
1、通过国内资源（清华镜像）进行下载，地址为https://mirrors.tuna.tsinghua.edu.cn/gitlab-ce/yum/el7/。
2、通过gitlab官网进行下载：https://packages.gitlab.com/gitlab/gitlab-ce/packages/el/7/gitlab-ce-14.7.6-ce.0.el7.x86_64.rpm
二、安装gitlab
通过yum仓库进行安装
这种方式如截图所示：
1、添加gitlab到yum仓库中：
curl -s https://packages.gitlab.com/install/repositories/gitlab/gitlab-ce/script.rpm.sh | sudo bash
2、通过yum进行安装：
sudo yum install gitlab-ce-14.7.6-ce.0.el7.x86_64
如果是root用户，可以删除sudo
yum install gitlab-ce-14.7.6-ce.0.el7.x86_64
通过源码包进行安装
1、将文件通过scp命令传输到服务器中
scp gitlab-ce-14.7.6-ce.0.el7.x86_64.rpm root@192.168.10.150:/root/Downloads
2、安装相关依赖
yum -y install policycoreutils openssh-server openssh-clients postfix
3、开启postfix，支持gitlab邮件发送
systemctl start postfix
设置开机自启动：
systemctl enable postfix
4、安装gitlab
rpm -ivh gitlab-ce-14.7.6-ce.0.el7.x86_64.rpm
5、修改gitlab配置文件指定服务器ip和自定义端口
vim /etc/gitlab/gitlab.rb修改字段如下：external_url
6、重置并启动gitlab
gitlab-ctl reconfigure # 重置
gitlab-ctl restart # 重启
7、gitlab初始密码：
初始密码存放在/etc/gitlab/initial_root_password
该密码在首次执行reconfigure24小时候自动删除。
问题合集
问题一：缺少依赖
解决方式：
yum install -y policycoreutils-python：安装对应的依赖即可gitlab需要的依赖有：policycoreutils、openssh-server、openssh-clients、postfix
问题二：软件包下载失败
解决方案：可能是由于网络原因下载失败，重新下载即可。
问题三：安装后没有设置自动重启，就把虚拟机给关闭了，再次打开虚拟机时，gitlab没有启动。
解决方案：
# 1、先启动对应的服务
systemctl start gitlab-runsvdir
# 2、通过gitlab-ctl重启gitlab
gitlab-ctl restart
成功安装gitlab后，通过浏览器访问出现502
这个也没有弄懂为什么，我是通过修改端口后就可以了
# 修改对应的端口号为非常用的，如8081
vim /etc/gitlab/gitlab.rb
# gitlab-ctl reconfigure
# gitlab-ctl restart
root密码忘记
解决方案：
1、查看用户的id
curl http://gitlab的url/api/v4/users?username=root
2、重置密码
1）进入gitlab控制台：
gitlab-rails console production
Traceback (most recent call last):
8: from bin/rails:4:in `<main>'
7: from bin/rails:4:in `require'
6: from /opt/gitlab/embedded/lib/ruby/gems/2.7.0/gems/railties-6.1.4.6/lib/rails/commands.rb:18:in `<top (required)>'
5: from /opt/gitlab/embedded/lib/ruby/gems/2.7.0/gems/railties-6.1.4.6/lib/rails/command.rb:48:in `invoke'
4: from /opt/gitlab/embedded/lib/ruby/gems/2.7.0/gems/railties-6.1.4.6/lib/rails/command/base.rb:69:in `perform'
3: from /opt/gitlab/embedded/lib/ruby/gems/2.7.0/gems/thor-1.2.1/lib/thor.rb:392:in `dispatch'
2: from /opt/gitlab/embedded/lib/ruby/gems/2.7.0/gems/thor-1.2.1/lib/thor/invocation.rb:127:in `invoke_command'
1: from /opt/gitlab/embedded/lib/ruby/gems/2.7.0/gems/thor-1.2.1/lib/thor/command.rb:27:in `run'
/opt/gitlab/embedded/lib/ruby/gems/2.7.0/gems/railties-6.1.4.6/lib/rails/commands/console/console_command.rb:95:in `perform': wrong number of arguments (given 1, expected 0) (ArgumentError)
9: from bin/rails:4:in `<main>'
8: from bin/rails:4:in `require'
7: from /opt/gitlab/embedded/lib/ruby/gems/2.7.0/gems/railties-6.1.4.6/lib/rails/commands.rb:18:in `<top (required)>'
6: from /opt/gitlab/embedded/lib/ruby/gems/2.7.0/gems/railties-6.1.4.6/lib/rails/command.rb:48:in `invoke'
5: from /opt/gitlab/embedded/lib/ruby/gems/2.7.0/gems/railties-6.1.4.6/lib/rails/command/base.rb:69:in `perform'
4: from /opt/gitlab/embedded/lib/ruby/gems/2.7.0/gems/thor-1.2.1/lib/thor.rb:392:in `dispatch'
3: from /opt/gitlab/embedded/lib/ruby/gems/2.7.0/gems/thor-1.2.1/lib/thor/invocation.rb:127:in `invoke_command'
2: from /opt/gitlab/embedded/lib/ruby/gems/2.7.0/gems/thor-1.2.1/lib/thor/command.rb:20:in `run'
1: from /opt/gitlab/embedded/lib/ruby/gems/2.7.0/gems/thor-1.2.1/lib/thor/command.rb:34:in `rescue in run'
/opt/gitlab/embedded/lib/ruby/gems/2.7.0/gems/thor-1.2.1/lib/thor/base.rb:525:in `handle_argument_error': ERROR: "rails console" was called with arguments ["production"] (Thor::InvocationError)
Usage: "rails console [options]"
通过上述命令无法进入gitlab的控制台，后来又试了一种
gitlab-rails console -e production
成功进入（ps：在gitlab官网找到对应版本的命令，但是我没有找到，有人找到麻烦留个言或者私信一下）
进入控制台后，陆续输入一下命令：
user = User.where(id: 1).first # 根据id找到用户
user.password = 'learngitlab' # 设置用户密码
user.password_confirmation = 'learngitlab' # 确认密码
user.save! # 保存密码
quit # 退出控制台
