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DEVOPS技术实践_14:使用docker部署jenkins

一 基础环境准备

[root@node6 ~]# cat /etc/redhat-release 

CentOS Linux release 7.6.1810 (Core)

[root@node6 ~]# yum -y install epel-release

[root@node6 ~]# yum update

[root@node6 ~]# uname -r

3.10.0-957.27.2.el7.x86_64

二 安装docker

2.1 使用脚本安装

[root@node6 ~]# curl -fsSL https://get.docker.com/ | sh

# Executing docker install script, commit: f45d7c11389849ff46a6b4d94e0dd1ffebca32c1
+ sh -c 'yum install -y -q yum-utils'
+ sh -c 'yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo'
Loaded plugins: fastestmirror
adding repo from: https://download.docker.com/linux/centos/docker-ce.repo
grabbing file https://download.docker.com/linux/centos/docker-ce.repo to /etc/yum.repos.d/docker-ce.repo
repo saved to /etc/yum.repos.d/docker-ce.repo
+ '[' stable '!=' stable ']'
+ sh -c 'yum makecache'
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
epel/x86_64/metalink                                                                                | 6.0 kB  00:00:00     
 * base: mirror.pregi.net
 * epel: mirror.pregi.net
 * extras: mirror.pregi.net
 * updates: mirror.pregi.net
base                                                                                                | 3.6 kB  00:00:00     
docker-ce-stable                                      
Metadata Cache Created
+ '[' -n '' ']'
+ sh -c 'yum install -y -q docker-ce'

2.2 启动docker

[root@node6 ~]# systemctl start docker

[root@node6 ~]# systemctl status docker

2.3 尝试运行jnekins容器

运行jenkins容器

[root@node6 ~]# docker run -d --name jenkins_dev -p 8000:8080 -p 50000:50000  jenkins/jenkins:lts

Unable to find image 'jenkins/jenkins:lts' locally
lts: Pulling from jenkins/jenkins
9a0b0ce99936: Pull complete 
db3b6004c61a: Pull complete 
f8f075920295: Pull complete 
6ef14aff1139: Pull complete 
962785d3b7f9: Pull complete 
631589572f9b: Pull complete 
c55a0c6f4c7b: Pull complete 
911269a281e7: Pull complete 
45099f90ad07: Pull complete 
bd655133fb06: Pull complete 
ea116f49f692: Pull complete 
a9e13a874162: Pull complete 
bdbca454a0c4: Pull complete 
9b2fec49ceaa: Pull complete 
765aaab2ff5b: Pull complete 
a46bfc77dc0f: Pull complete 
2cd8e1655f4a: Pull complete 
4d138a7aea1a: Pull complete 
Digest: sha256:c3b6fa9216336022067be94adb9d4696459903bf3e67e01a8d0009994f5ab78d
Status: Downloaded newer image for jenkins/jenkins:lts
d63c603216f7d24f0662318e754bf44c3ab25d11f5b3dc8ca764818d851d85b6

[root@node6 ~]# ip route

default via 192.168.132.2 dev ens33 
default via 192.168.132.2 dev ens33 proto dhcp metric 100 
169.254.0.0/16 dev ens33 scope link metric 1002 
172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1 
192.168.132.0/24 dev ens33 proto kernel scope link src 192.168.132.136 metric 100 
192.168.132.0/24 dev ens33 proto kernel scope link src 192.168.132.147 metric 100 

[root@node6 ~]# netstat -ntlp

Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN      1324/master         
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      25594/sshd          
tcp6       0      0 ::1:25                  :::*                    LISTEN      1324/master         
tcp6       0      0 :::8000                 :::*                    LISTEN      56998/docker-proxy  
tcp6       0      0 127.0.0.1:8005          :::*                    LISTEN      6297/java           
tcp6       0      0 :::8009                 :::*                    LISTEN      6297/java           
tcp6       0      0 :::50000                :::*                    LISTEN      56984/docker-proxy  
tcp6       0      0 :::8080                 :::*                    LISTEN      6297/java           
tcp6       0      0 :::22                   :::*                    LISTEN      25594/sshd     

访问50000端口

[root@node6 bin]# docker ps -a

CONTAINER ID        IMAGE                 COMMAND                  CREATED             STATUS              PORTS                                              NAMES
d63c603216f7        jenkins/jenkins:lts   "/sbin/tini -- /usr/…"   16 minutes ago      Up 16 minutes       0.0.0.0:50000->50000/tcp, 0.0.0.0:8000->8080/tcp   jenkins_dev

[root@node6 ~]# docker exec -it jenkins_dev \

cat /var/jenkins_home/secrets/initialAdminPassword

c549879f412f4063a5098a45276b0320

或者进入到容器的内部,执行docker exec命令。
sudo docker exec -it jenkins_dev bash

进入到容器内部后,执行下面的命令去获取内容。

cat /var/jenkins_home/secrets/initialAdminPassword

运行jenkins容器,容器使用数据卷

创建jenkins容器,没有使jenkins_home目录中的数据保持持久,简单的说,就是如果删除了容器,那么jenkins_home目录中的数据也会被删除。

因此通过data volumes能保持数据的持久,数据卷在特别的目录,能保持数据持久而不受容器生命周期的影响。 就是在删除容器时,还能保持数据。数据完全和容器能够独立。

三 容器使用数据卷

使用下面命令运行Jenkins容器。

3.1 删除容器

[root@node6 bin]# docker stop d63c603216f7
d63c603216f7

[root@node6 bin]# docker rm d63c603216f7
d63c603216f7

[root@node6 bin]# docker run -d --name jenkins_prod -p 8080:8080 -p 50000:50000 -v jenkins-home-prod:/var/jenkins_home jenkins/jenkins:lts

a53cb2d416f6e3aa1cbb48d81f2e60f254063775436fb95cc273da602ebb4e46

[root@node6 bin]# docker ps -a

CONTAINER ID        IMAGE                 COMMAND                  CREATED             STATUS              PORTS                                              NAMES
a53cb2d416f6        jenkins/jenkins:lts   "/sbin/tini -- /usr/…"   17 seconds ago      Up 16 seconds       0.0.0.0:8080->8080/tcp, 0.0.0.0:50000->50000/tcp   jenkins_prod

-v jenkins-home-prod:/var/jenkins_home选项创建一个名为jenkins-home-prod的卷,并和容器内部的/var/jenkins_home目录做映射。

执行下面的命令去查看jenkins_prod容器中的/var/jenkins_home目录内容。

[root@node6 bin]# docker exec -it jenkins_prod ls -lrt /var/jenkins_home

-rw-rw-r--  1 root    root    7152 Oct 28 20:47 tini_pub.gpg
-rw-r--r--  1 jenkins jenkins   50 Nov  4 13:56 copy_reference_file.log
drwxr-xr-x 11 jenkins jenkins 4096 Nov  4 13:56 war
-rw-r--r--  1 jenkins jenkins   29 Nov  4 13:56 failed-boot-attempts.txt
-rw-r--r--  1 jenkins jenkins   64 Nov  4 13:56 secret.key
-rw-r--r--  1 jenkins jenkins    0 Nov  4 13:56 secret.key.not-so-secret
drwxr-xr-x  2 jenkins jenkins    6 Nov  4 13:56 plugins
drwxr-xr-x  2 jenkins jenkins    6 Nov  4 13:57 jobs
drwxr-xr-x  2 jenkins jenkins    6 Nov  4 13:57 nodes
-rw-r--r--  1 jenkins jenkins  156 Nov  4 13:57 hudson.model.UpdateCenter.xml
-rw-------  1 jenkins jenkins 1712 Nov  4 13:57 identity.key.enc
-rw-r--r--  1 jenkins jenkins  171 Nov  4 13:57 jenkins.telemetry.Correlator.xml
drwxr-xr-x  2 jenkins jenkins   24 Nov  4 13:57 userContent
drwxr-xr-x  3 jenkins jenkins   19 Nov  4 13:57 logs
-rw-r--r--  1 jenkins jenkins  907 Nov  4 13:57 nodeMonitors.xml
-rw-r--r--  1 jenkins jenkins    7 Nov  4 13:57 jenkins.install.UpgradeWizard.state
drwxr-xr-x  3 jenkins jenkins   56 Nov  4 13:57 users
drwx------  4 jenkins jenkins  265 Nov  4 13:57 secrets
-rw-r--r--  1 jenkins jenkins 1658 Nov  4 13:57 config.xml

3.2 列出数据卷

[root@node6 bin]# docker volume ls

DRIVER              VOLUME NAME
local               fffcf955473d4cd319aa9fc6c32a5f32ca09606ff4d4c74d1a5462c67ea4f025
local               jenkins-home-prod

3.3 测试数据卷

  • 执行以下步骤测试数据卷
  • 在jenkins server中做一些改变,修改/var/jenkins_home目录中的内容
  • 删除jenkins容器
  • 使用下面的命令检查活动的jenkins容器

[root@node6 bin]# docker ps --format "{{.ID}}: {{.Image}} {{.Names}}"

a53cb2d416f6: jenkins/jenkins:lts jenkins_prod

3.4 访问测试

使用http://IP:8080访问jenkins服务器

http://192.168.132.136:8080/login?from=%2F

使用下面的命令获取initialAdminPassword文件的内容

 [root@node6 bin]# docker exec -it jenkins_prod \

> cat /var/jenkins_home/secrets/initialAdminPassword

6a8fff13ae8e47ddadef1105de1230e7

获取密码后,粘贴到里面后,安装插件,然后创建First Admin User.

创建用户

创建一个任务

 

3.5 查看目录

执行下面的命令获取/var/jenkins_home/users目录中的内容

[root@node6 bin]# docker exec -it jenkins_prod ls -lrt 

drwxr-xr-x   2 root root   6 Sep  8 10:51 home
drwxr-xr-x   2 root root   6 Sep  8 10:51 boot
drwxr-xr-x   1 root root  19 Oct 14 00:00 usr
drwxr-xr-x   2 root root   6 Oct 14 00:00 srv
drwxr-xr-x   3 root root  30 Oct 14 00:00 run
drwxr-xr-x   2 root root   6 Oct 14 00:00 opt
drwxr-xr-x   2 root root   6 Oct 14 00:00 mnt
drwxr-xr-x   2 root root   6 Oct 14 00:00 media
drwxr-xr-x   2 root root  34 Oct 14 00:00 lib64
drwxr-xr-x   1 root root  30 Oct 14 00:00 lib
drwx------   1 root root  24 Oct 18 23:40 root
drwxr-xr-x   1 root root  26 Oct 28 20:47 var
drwxr-xr-x   1 root root  18 Oct 28 20:47 sbin
drwxr-xr-x   1 root root  18 Oct 28 20:48 bin
drwxr-xr-x   1 root root  66 Nov  4 13:56 etc
dr-xr-xr-x 147 root root   0 Nov  4 13:56 proc
dr-xr-xr-x  13 root root   0 Nov  4 13:56 sys
drwxr-xr-x   5 root root 340 Nov  4 13:56 dev
drwxrwxrwt   1 root root 130 Nov  4 13:56 tmp

3.6 删除容器

[root@node6 bin]# docker kill jenkins_prod
jenkins_prod
[root@node6 bin]# docker rm jenkins_prod
jenkins_prod
[root@node6 bin]# docker ps -a
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES

3.7 查看已存在容器以及卷

[root@node6 bin]# docker ps -a --format "{{.ID}}: {{.Image}} {{.Names}}"
[root@node6 bin]# docker volume ls
DRIVER              VOLUME NAME
local               fffcf955473d4cd319aa9fc6c32a5f32ca09606ff4d4c74d1a5462c67ea4f025
local               jenkins-home-prod

3.8 创建名为jenkins_prod的容器,并使用已经存在的jenkins-home-prod卷。

[root@node6 bin]# docker run -d --name jenkins_prod -p 8080:8080 \
> -p 50000:50000 -v jenkins-home-prod:/var/jenkins_home \
> jenkins/jenkins:lts
b119e7f28b507b3a3e9dd4a91a5d361bbadbfdad35d4cf95cc467bc6daed8d3a

3.9 访问测试

访问 http://ip:8080,可以直接看到登陆界面,而不是再次让我们初始登陆

http://192.168.132.136:8080

直接出现登陆界面

登陆进入后,数据依然在

实验完成


参考文档:藏雪原老师视频教程https://edu.csdn.net/course/play/9051/187998

posted @ 2019-11-04 22:44  梦中泪  阅读(967)  评论(0编辑  收藏  举报