前言
Jenkins 是一套自动化软件，结合不同的插件可以轻易实现 CI/CD 工作流
Jenkins 更新很快，分为两个版本
Long-term Support (LTS)
每十二周升级一个版本
LTS (Long-Term Support) releases are chosen every 12 weeks from the stream of regular releases as the stable release for that time period
Weekly
每周升级一个版本
A new release is produced weekly to deliver bug fixes and features to users and plugin developers.
区别
The weekly Jenkins releases deliver bug fixes and new features rapidly to users and plugin developers who need them. But for more conservative users, it’s preferable to stick to a release line which changes less often and only receives important bug fixes, even if such a release line lags behind in terms of features.
Jenkins 与 k8s 还有 Gitlab 常常放在一起构建持续集成系统
下面分享一下 Jenkins 升级过程
Tip: 当前版本 Jenkins 2.89.3 LTS
操作
系统环境
代码语言：javascript复制[root@much ~]# hostnamectl
Static hostname: much
Icon name: computer-vm
Chassis: vm
Machine ID: 33dc28f7e76c4903ad9b603b77e29a7c
Boot ID: f91fb2eedcd345cf9cd7e6d80aab5115
Virtualization: kvm
Operating System: CentOS Linux 7 (Core)
CPE OS Name: cpe:/o:centos:centos:7
Kernel: Linux 3.10.0-514.21.1.el7.x86_64
Architecture: x86-64
[root@much ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 08:00:27:d1:5d:f7 brd ff:ff:ff:ff:ff:ff
inet 10.0.2.15/24 brd 10.0.2.255 scope global dynamic enp0s3
valid_lft 83782sec preferred_lft 83782sec
3: enp0s8: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 08:00:27:47:20:56 brd ff:ff:ff:ff:ff:ff
inet 192.168.56.208/24 brd 192.168.56.255 scope global enp0s8
valid_lft forever preferred_lft forever
4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000
link/ether 52:54:00:16:5e:11 brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
5: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
link/ether 52:54:00:16:5e:11 brd ff:ff:ff:ff:ff:ff
[root@much ~]#发现新版本
可见当前版本为 Jenkins ver. 2.89.2 系统提示有新版本 New version of Jenkins (2.89.3) is available for download (changelog)
更新日志
通过 变更日志 我们可以看到新版本有哪些变更
也可以通过 升级指导 来看看官方的建议
下载更新版本
下载更新版本
代码语言：javascript复制[root@much tmp]# ll *.war
-rw-r--r-- 1 root root 74292096 1月 20 16:58 jenkins.war
[root@much tmp]#确认安装路径
[主页]->[Manage Jenkins]->[System Information]
可以看到安装路径为 /usr/lib/jenkins/jenkins.war
停止服务
主页面会提示 Jenkins is going to shut down
然后在没有运行任务的情况下安全地停止 Jenkins 服务
代码语言：javascript复制[root@much tmp]# ps faux | grep jenkins -i
root 3269 0.0 0.0 112648 1028 pts/0 S 18:03 0:00 | _ grep --color=auto jenkins -i
jenkins 1630 2.7 17.6 3720188 714756 ? Ssl 16:36 2:24 /etc/alternatives/java -Djava.awt.headless=true -DJENKINS_HOME=/var/lib/jenkins -jar /usr/lib/jenkins/jenkins.war --logfile=/var/log/jenkins/jenkins.log --webroot=/var/cache/jenkins/war --httpPort=8080 --debug=5 --handlerCountMax=100 --handlerCountMaxIdle=20
[root@much tmp]# systemctl stop jenkins
[root@much tmp]# systemctl status jenkins
● jenkins.service - LSB: Jenkins Automation Server
Loaded: loaded (/etc/rc.d/init.d/jenkins; bad; vendor preset: disabled)
Active: inactive (dead) since 六 2018-01-20 18:03:47 CST; 8s ago
Docs: man:systemd-sysv-generator(8)
Process: 3276 ExecStop=/etc/rc.d/init.d/jenkins stop (code=exited, status=0/SUCCESS)
Process: 1519 ExecStart=/etc/rc.d/init.d/jenkins start (code=exited, status=0/SUCCESS)
1月 20 16:36:28 much systemd[1]: Starting LSB: Jenkins Automation Server...
1月 20 16:36:28 much runuser[1524]: pam_unix(runuser:session): session ope...0)
1月 20 16:36:30 much systemd[1]: Started LSB: Jenkins Automation Server.
1月 20 16:36:30 much jenkins[1519]: Starting Jenkins [ OK ]
1月 20 18:03:47 much systemd[1]: Stopping LSB: Jenkins Automation Server...
1月 20 18:03:47 much jenkins[3276]: Shutting down Jenkins [ OK ]
1月 20 18:03:47 much systemd[1]: Stopped LSB: Jenkins Automation Server.
Hint: Some lines were ellipsized, use -l to show in full.
[root@much tmp]#备份和替换 WAR
代码语言：javascript复制[root@much tmp]# ll *.war
-rw-r--r-- 1 root root 74292096 1月 20 16:58 jenkins.war
[root@much tmp]# cd /usr/lib/jenkins/
[root@much jenkins]# ls
jenkins.war
[root@much jenkins]# mv jenkins.war jenkins.war.old
[root@much jenkins]# mv jenkins.war.old jenkins.war.old.20180120
[root@much jenkins]# ls
jenkins.war.old.20180120
[root@much jenkins]# cp /tmp/jenkins.war .
[root@much jenkins]# ll
total 145108
-rw-r--r-- 1 root root 74292096 1月 20 18:08 jenkins.war
-rw-r--r-- 1 root root 74294776 12月 14 10:23 jenkins.war.old.20180120
[root@much jenkins]#启动服务
代码语言：javascript复制[root@much jenkins]# systemctl start jenkins
[root@much jenkins]# systemctl status jenkins
● jenkins.service - LSB: Jenkins Automation Server
Loaded: loaded (/etc/rc.d/init.d/jenkins; bad; vendor preset: disabled)
Active: active (running) since 六 2018-01-20 18:10:06 CST; 7s ago
Docs: man:systemd-sysv-generator(8)
Process: 3276 ExecStop=/etc/rc.d/init.d/jenkins stop (code=exited, status=0/SUCCESS)
Process: 3372 ExecStart=/etc/rc.d/init.d/jenkins start (code=exited, status=0/SUCCESS)
CGroup: /system.slice/jenkins.service
└─3389 /etc/alternatives/java -Dcom.sun.akuma.Daemon=daemonized -D...
1月 20 18:10:05 much systemd[1]: Starting LSB: Jenkins Automation Server...
1月 20 18:10:05 much runuser[3373]: pam_unix(runuser:session): session ope...0)
1月 20 18:10:06 much jenkins[3372]: Starting Jenkins [ OK ]
1月 20 18:10:06 much systemd[1]: Started LSB: Jenkins Automation Server.
Hint: Some lines were ellipsized, use -l to show in full.
[root@much jenkins]#进行访问
出现登录界面,输入登录密码
