使用docker安装jenkins

1、安装环境

root@ruide-server:~# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 24.10
Release:        24.10
Codename:       oracular

2、安装docker-ce

docker安装教程网上很多，不做赘述

root@ruide-server:~# docker version
Client: Docker Engine - Community
 Version:           27.3.1
 API version:       1.47
 Go version:        go1.22.7
 Git commit:        ce12230
 Built:             Fri Sep 20 11:41:03 2024
 OS/Arch:           linux/amd64
 Context:           default

Server: Docker Engine - Community
 Engine:
  Version:          27.3.1
  API version:      1.47 (minimum version 1.24)
  Go version:       go1.22.7
  Git commit:       41ca978
  Built:            Fri Sep 20 11:41:03 2024
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.7.24
  GitCommit:        88bf19b2105c8b17560993bee28a01ddc2f97182
 runc:
  Version:          1.2.2
  GitCommit:        v1.2.2-0-g7cb3632
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

3、安装jenkins

3.1 安装jenkins:lts-jdk17

docker run -d -p 8099:8080 -p 50000:50000 -v jenkins-data:/var/jenkins_home --name myjenkins  
--restart always jenkins/jenkins:lts-jdk17

3.2 访问

http://127.0.0.1:8099/

docker 日志中获取密码，粘贴至上图输入框，点继续

安装插件，推荐的即可

FAQ

1 jenkins执行mvn命令报内存不足错误

[Pipeline] sh
+ mvn -B -DskipTests clean package
library initialization failed - unable to allocate file descriptor table - out of memoryAborted (core dumped)
[Pipeline] }

原因：docker启动容器时，若未给容器配置ulimit，则从docker守护进程上设置的默认ulimits继承，这个值太大？会报这个错
ulimit nofile这个值太大报错的原因：

JDK8启动程序时会尝试为文件句柄分配内存，文件句柄数即系统设置ulimit nofile的值，若ulimit nofile很大，文件句柄数量十分巨大，就导致了即便分配10G运存还是Out Of Memory。旧版的Linux默认句柄数为1024，则不会出现该异常。
参考链接：docker 报错 library initialization failed - unable to allocate file descriptor table - out of memory