前面实验了使用docker搭建一个jenkins，下面实验使用docker作为jenkins的slave节点
1. 环境准备
- 一个运行Docker的主机或者群集
- Jenkins应该能访问互联网，方便安装插件。
- Jenkins服务器能够和GitHub通信。
- Jenkinss对Java所需要的Git,和Maven配置应该配置好。
- 一个Jenkins master.
2. 在Docker主机上开启远端的访问API
此处针对Docker 18.03
/etc/docker/daemon.json会被docker.service的配置文件覆盖，直接添加daemon.json不起作用。可以有如下几种设置：
直接编辑配置文件：Centos中docker daemon配置文件在/lib/systemd/system/docker.service，找到以下字段，在后面添加如下，注意，此处不能用”fd：//”,否则报错
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
BindsTo=containerd.service
After=network-online.target firewalld.service containerd.service
Wants=network-online.target
Requires=docker.socket
[Service]
Type=notify
# the default is not to use systemd for cgroups because the delegate issues still
# exists and systemd currently does not support the cgroup feature set required
# for containers run by docker
#ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
ExecStart=/usr/bin/dockerd -H unix:///var/run/docker.sock -H tcp://0.0.0.0:2375 #添加
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=always
# Note that StartLimit* options were moved from "Service" to "Unit" in systemd 229.
# Both the old, and new location are accepted by systemd 229 and up, so using the old location
# to make them work for either version of systemd.
StartLimitBurst=3
# Note that StartLimitInterval was renamed to StartLimitIntervalSec in systemd 230.
# Both the old, and new name are accepted by systemd 230 and up, so using the old name to make
# this option work for either version of systemd.
StartLimitInterval=60s
# Having non-zero Limit*s causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
# Comment TasksMax if your systemd version does not support it.
# Only systemd 226 and above support this option.
TasksMax=infinity
# set delegate yes so that systemd does not reset the cgroups of docker containers
Delegate=yes
执行
[root@node6 ~]# systemctl daemon-reload
[root@node6 ~]# systemctl restart docker.service
安装Docker插件
点击【管理Jenkins】–【管理插件】–【可选插件】然后安装此插件
3. 配置Docker插件
点击系统管理----->系统设置
添加配置
然后点击保存
4. 创建Docker镜像
需要创建一个Docker的镜像在Docker主机上，方便我们在创建Jenkins slaves时使用。
查看Docker的镜像
[root@node6 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
jenkins/jenkins lts fac78e370c0b 6 days ago 568MB
拉取ubuntu的镜像
由于拉取的Ubuntu安装git有点问题，重新拉去一个ubuntu16.04的镜像
[root@node6 ~]# docker pull dftbcros.mirror.aliyuncs.com/library/ubuntu:16.04
16.04: Pulling from library/ubuntu
e80174c8b43b: Pull complete
d1072db285cc: Pull complete
858453671e67: Pull complete
3d07b1124f98: Pull complete
Digest: sha256:bb5b48c7750a6a8775c74bcb601f7e5399135d0a06de004d000e05fd25c1a71c
Status: Downloaded newer image for dftbcros.mirror.aliyuncs.com/library/ubuntu:16.04
dftbcros.mirror.aliyuncs.com/library/ubuntu:16.04
[root@node6 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
dftbcros.mirror.aliyuncs.com/library/ubuntu 16.04 5f2bf26e3524 3 days ago 123MB
jenkins/jenkins lts fac78e370c0b 6 days ago 568MB
centos latest 0f3e07c0138f 4 weeks ago 220MB
[root@node6 ~]# docker pull centos
Using default tag: latest
latest: Pulling from library/centos
729ec3a6ada3: Pull complete
Digest: sha256:f94c1d992c193b3dc09e297ffd54d8a4f1dc946c37cbeceb26d35ce1647f88d9
Status: Downloaded newer image for centos:latest
docker.io/library/centos:latest
执行下面的命令运行Docker容器并在容器中执行命令。
root@37e4f2be0a41:/# apt-get update
Get:1 http://archive.ubuntu.com/ubuntu xenial InRelease [247 kB]
Get:2 http://security.ubuntu.com/ubuntu xenial-security InRelease [109 kB]
Get:3 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages [985 kB]
Get:4 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [109 kB]
Get:5 http://archive.ubuntu.com/ubuntu xenial-backports InRelease [107 kB]
Get:6 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages [1558 kB]
Get:7 http://security.ubuntu.com/ubuntu xenial-security/restricted amd64 Packages [12.7 kB]
Get:8 http://security.ubuntu.com/ubuntu xenial-security/universe amd64 Packages [589 kB]
Get:9 http://security.ubuntu.com/ubuntu xenial-security/multiverse amd64 Packages [6281 B]
Get:10 http://archive.ubuntu.com/ubuntu xenial/restricted amd64 Packages [14.1 kB]
Get:11 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages [9827 kB]
Get:12 http://archive.ubuntu.com/ubuntu xenial/multiverse amd64 Packages [176 kB]
Get:13 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages [1362 kB]
Get:14 http://archive.ubuntu.com/ubuntu xenial-updates/restricted amd64 Packages [13.1 kB]
Get:15 http://archive.ubuntu.com/ubuntu xenial-updates/universe amd64 Packages [993 kB]
Get:16 http://archive.ubuntu.com/ubuntu xenial-updates/multiverse amd64 Packages [19.3 kB]
Get:17 http://archive.ubuntu.com/ubuntu xenial-backports/main amd64 Packages [7942 B]
Get:18 http://archive.ubuntu.com/ubuntu xenial-backports/universe amd64 Packages [8807 B]
Fetched 16.1 MB in 6min 48s (39.5 kB/s)
Reading package lists... Done
安装git
root@37e4f2be0a41:/# apt-get install -y git
添加用户
root@:37e4f2be0a41/# adduser jenkins
Adding user `jenkins' ...
Adding new group `jenkins' (1000) ...
Adding new user `jenkins' (1000) with group `jenkins' ...
Creating home directory `/home/jenkins' ...
Copying files from `/etc/skel' ...
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
Changing the user information for jenkins
Enter the new value, or press ENTER for the default
Full Name []: 123
Room Number []: 12
Work Phone []: 312
Home Phone []: 21
Other []: 21
Is the information correct? [Y/n] Y
安装SSH server
root@37e4f2be0a41:/# apt-get install openssh-serverd
root@37e4f2be0a41:/# mkdir /var/run/sshd
5. 安装所需的应用
root@37e4f2be0a41:/# apt-get install openjdk-8-jdk -y
root@37e4f2be0a41:/# apt-get install maven
root@37e4f2be0a41:/# exit
[root@node6 ~]# docker ps -a
37e4f2be0a41 5f2bf26e3524 "/bin/bash" About an hour ago Exited (0) 20 seconds ago sweet_hypatia
6. 保存镜像
[root@node6 ~]# docker commit b119e7f28b50 maven-build-slave-0.2
sha256:3a444723b0557cf81661b3f95947c3deae8c93008476ac3a86cbb8b7979815ce
[root@node6 ~]# docker images
maven-build-slave-0.2 latest 3a444723b055 About a minute ago 568MB
7. jenkins配置docker凭据
系统管理----->系统设置
创建凭据
配置模板
保存
8. jenkins测试
使用这个项目
pipeline语法
node('docker') {
// some block
stage('Preparation') {
// some block
//step
git 'https://github.com/jglick/simple-maven-project-with-tests.git'
}
stage('Build') {
// some block
//step
withMaven(maven: 'M3') {
// some block
sh label: '', script: 'mvn -Dmaven.test.failuer.ignore clean install package'
}
}
}
构建即可
