centos6.9安装Jenkins服务
1.安装javajdk，默认centos6.9只能下载到java8，安装成功后Jenkins会有一堆插件用不了，使用这里手动安装java17，在官网找对应安装包
https://www.oracle.com/java/technologies/downloads/#java17
这里下载了jdk-17_linux-x64_bin.rpm格式
rpm -ivh 文件名
java -version 查看下版本，有输出就安装成功了
设置JAVA_HOME：为了方便使用Java 17，您可以设置JAVA_HOME环境变量。编辑/etc/profile文件，并在文件末尾添加以下行：
export JAVA_HOME=/usr/java/jdk-17
export PATH=$JAVA_HOME/bin:$PATH
保存文件并退出。然后运行以下命令以使更改生效：
source /etc/profile至此java环境安装成功
安装Jenkins
2. 添加Jenkins仓库的GPG密钥：
```
sudo rpm --import https://pkg.jenkins.io/redhat/jenkins.io.key
```
3. 添加Jenkins仓库到yum源列表：
```
sudo wget -O /etc/yum.repos.d/jenkins.repo https://pkg.jenkins.io/redhat-stable/jenkins.repo
```
4. 导入Jenkins仓库的GPG密钥：
```
sudo rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io.key
```
6. 安装Jenkins：
```
sudo yum install jenkins
注意这里默认会装上最新的，根据你本地的环境可能会下不了，我安装的时候就报错了
Resolving Dependencies
--> Running transaction check
---> Package jenkins.noarch 0:2.426.1-1.1 will be installed
--> Processing Dependency: systemd for package: jenkins-2.426.1-1.1.noarch
--> Processing Dependency: systemd for package: jenkins-2.426.1-1.1.noarch
--> Finished Dependency Resolution
Error: Package: jenkins-2.426.1-1.1.noarch (jenkins)
Requires: systemd
You could try using --skip-broken to work around the problem
** Found 40 pre-existing rpmdb problem(s), 'yum check' output follows:
mysql1-5.6.39-1.x86_64 has missing requires of perl(lib::mtr_gcov.pl)
mysql1-5.6.39-1.x86_64 has missing requires of perl(lib::mtr_gprof.pl)
mysql1-5.6.39-1.x86_64 has missing requires of perl(lib::mtr_io.pl)
mysql1-5.6.39-1.x86_64 has missing requires of perl(lib::mtr_misc.pl)
mysql1-5.6.39-1.x86_64 has missing requires of perl(lib::mtr_process.pl)
mysql1-5.6.39-1.x86_64 has missing requires of perl(lib::v1/mtr_cases.pl)
mysql1-5.6.39-1.x86_64 has missing requires of perl(lib::v1/mtr_gcov.pl)
mysql1-5.6.39-1.x86_64 has missing requires of perl(lib::v1/mtr_gprof.pl)
mysql1-5.6.39-1.x86_64 has missing requires of perl(lib::v1/mtr_im.pl)
mysql1-5.6.39-1.x86_64 has missing requires of perl(lib::v1/mtr_io.pl)
mysql1-5.6.39-1.x86_64 has missing requires of perl(lib::v1/mtr_match.pl)
mysql1-5.6.39-1.x86_64 has missing requires of perl(lib::v1/mtr_misc.pl)
mysql1-5.6.39-1.x86_64 has missing requires of perl(lib::v1/mtr_process.pl)
mysql1-5.6.39-1.x86_64 has missing requires of perl(lib::v1/mtr_report.pl)
mysql1-5.6.39-1.x86_64 has missing requires of perl(lib::v1/mtr_stress.pl)
mysql1-5.6.39-1.x86_64 has missing requires of perl(lib::v1/mtr_timer.pl)
mysql1-5.6.39-1.x86_64 has missing requires of perl(lib::v1/mtr_unique.pl)
mysql1-5.6.39-1.x86_64 has missing requires of perl(mtr_io.pl)
mysql1-5.6.39-1.x86_64 has missing requires of perl(mtr_misc.pl)
mysql1-5.6.39-1.x86_64 has missing requires of perl(mtr_process.pl)
mysql2-5.6.39-1.x86_64 has missing requires of perl(lib::mtr_gcov.pl)
mysql2-5.6.39-1.x86_64 has missing requires of perl(lib::mtr_gprof.pl)
mysql2-5.6.39-1.x86_64 has missing requires of perl(lib::mtr_io.pl)
mysql2-5.6.39-1.x86_64 has missing requires of perl(lib::mtr_misc.pl)
mysql2-5.6.39-1.x86_64 has missing requires of perl(lib::mtr_process.pl)
mysql2-5.6.39-1.x86_64 has missing requires of perl(lib::v1/mtr_cases.pl)
mysql2-5.6.39-1.x86_64 has missing requires of perl(lib::v1/mtr_gcov.pl)
mysql2-5.6.39-1.x86_64 has missing requires of perl(lib::v1/mtr_gprof.pl)
mysql2-5.6.39-1.x86_64 has missing requires of perl(lib::v1/mtr_im.pl)
mysql2-5.6.39-1.x86_64 has missing requires of perl(lib::v1/mtr_io.pl)
mysql2-5.6.39-1.x86_64 has missing requires of perl(lib::v1/mtr_match.pl)
mysql2-5.6.39-1.x86_64 has missing requires of perl(lib::v1/mtr_misc.pl)
mysql2-5.6.39-1.x86_64 has missing requires of perl(lib::v1/mtr_process.pl)
mysql2-5.6.39-1.x86_64 has missing requires of perl(lib::v1/mtr_report.pl)
mysql2-5.6.39-1.x86_64 has missing requires of perl(lib::v1/mtr_stress.pl)
mysql2-5.6.39-1.x86_64 has missing requires of perl(lib::v1/mtr_timer.pl)
mysql2-5.6.39-1.x86_64 has missing requires of perl(lib::v1/mtr_unique.pl)
mysql2-5.6.39-1.x86_64 has missing requires of perl(mtr_io.pl)
mysql2-5.6.39-1.x86_64 has missing requires of perl(mtr_misc.pl)
mysql2-5.6.39-1.x86_64 has missing requires of perl(mtr_process.pl)说是我的mysql环境有问题，搞来搞去没成功
解决方法：到Jenkins仓库官网看下https://pkg.jenkins.io/redhat-stable/ 有什么版本可以用
sudo yum install jenkins-2.361.1
指定这个版本我就安装成功了
```
7. 启动Jenkins服务：
```
sudo service jenkins start
```
8. 配置Jenkins服务开机自启动：
```
sudo chkconfig jenkins on
```
9. 打开防火墙端口，允许Jenkins流量通过：
```
sudo firewall-cmd --zone=public --add-port=8080/tcp --permanent
sudo firewall-cmd --reload
```
10. 完成安装后，通过以下URL访问Jenkins Web界面：
```
http://your_server_ip:8080
```
11. 在首次访问时，您将需要提供Jenkins管理员密码。您可以通过以下命令找到该密码：
```
sudo cat /var/lib/jenkins/secrets/initialAdminPassword
```
复制密码并粘贴到Jenkins Web界面中进行验证。
