Docker环境搭建¶
Docker安装¶
系统: Centos7
安装依赖库
yum install -y yum-utils device-mapper-persistent-data lvm2
安装docker仓库
sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
更新yum包索引
yum makecache fast
安装最新版本的Docker CE
yum install docker-ce
Docker版本查看
[root@localhost opt]# docker version Client: Docker Engine - Community Version: 20.10.5 API version: 1.41 Go version: go1.13.15 Git commit: 55c4c88 Built: Tue Mar 2 20:33:55 2021 OS/Arch: linux/amd64 Context: default Experimental: true Server: Docker Engine - Community Engine: Version: 20.10.5 API version: 1.41 (minimum version 1.12) Go version: go1.13.15 Git commit: 363e9a8 Built: Tue Mar 2 20:32:17 2021 OS/Arch: linux/amd64 Experimental: false containerd: Version: 1.4.3 GitCommit: 269548fa27e0089a8b8278fc4fc781d7f65a939b runc: Version: 1.0.0-rc92 GitCommit: ff819c7e9184c13b7c2607fe6c30ae19403a7aff docker-init: Version: 0.19.0 GitCommit: de40ad0 [root@localhost opt]#
Docker卸载
[root@localhost ~]# yum remove docker docker-common docker-selinux docker-engine docker-ce-cli Loaded plugins: fastestmirror, langpacks No Match for argument: docker No Match for argument: docker-common No Match for argument: docker-engine Resolving Dependencies --> Running transaction check ---> Package container-selinux.noarch 2:2.119.2-1.911c772.el7_8 will be erased --> Processing Dependency: container-selinux >= 2:2.74 for package: containerd.io-1.4.4-3.1.el7.x86_64 --> Processing Dependency: container-selinux >= 2:2.74 for package: 3:docker-ce-20.10.5-3.el7.x86_64 --> Running transaction check ---> Package containerd.io.x86_64 0:1.4.4-3.1.el7 will be erased ---> Package docker-ce.x86_64 3:20.10.5-3.el7 will be erased --> Processing Dependency: docker-ce for package: docker-ce-rootless-extras-20.10.5-3.el7.x86_64 --> Running transaction check ---> Package docker-ce-rootless-extras.x86_64 0:20.10.5-3.el7 will be erased --> Finished Dependency Resolution extras/7/x86_64 | 2.9 kB 00:00:00 mysql-connectors-community/x86_64 | 2.6 kB 00:00:00 mysql-tools-community/x86_64 | 2.6 kB 00:00:00 mysql56-community/x86_64 | 2.6 kB 00:00:00 nux-dextop/x86_64 | 2.9 kB 00:00:01 updates/7/x86_64 | 2.9 kB 00:00:00 Dependencies Resolved ==================================================================================================================================================================== Package Arch Version Repository Size ==================================================================================================================================================================== Removing: container-selinux noarch 2:2.119.2-1.911c772.el7_8 @extras 41 k Removing for dependencies: containerd.io x86_64 1.4.4-3.1.el7 @docker-ce-stable 128 M docker-ce x86_64 3:20.10.5-3.el7 @docker-ce-stable 115 M docker-ce-rootless-extras x86_64 20.10.5-3.el7 @docker-ce-stable 24 M Transaction Summary ==================================================================================================================================================================== Remove 1 Package (+3 Dependent packages) Installed size: 268 M Is this ok [y/N]: y Downloading packages: Running transaction check Running transaction test Transaction test succeeded Running transaction Erasing : docker-ce-rootless-extras-20.10.5-3.el7.x86_64 1/4 Erasing : 3:docker-ce-20.10.5-3.el7.x86_64 2/4 Erasing : containerd.io-1.4.4-3.1.el7.x86_64 3/4 Erasing : 2:container-selinux-2.119.2-1.911c772.el7_8.noarch 4/4 Verifying : containerd.io-1.4.4-3.1.el7.x86_64 1/4 Verifying : 3:docker-ce-20.10.5-3.el7.x86_64 2/4 Verifying : docker-ce-rootless-extras-20.10.5-3.el7.x86_64 3/4 Verifying : 2:container-selinux-2.119.2-1.911c772.el7_8.noarch 4/4 Removed: container-selinux.noarch 2:2.119.2-1.911c772.el7_8 Dependency Removed: containerd.io.x86_64 0:1.4.4-3.1.el7 docker-ce.x86_64 3:20.10.5-3.el7 docker-ce-rootless-extras.x86_64 0:20.10.5-3.el7 Complete! [root@localhost ~]# rm -rf /var/lib/docker [root@localhost ~]# rm -f /etc/docker/daemon.json [root@localhost ~]# rm -f /usr/lib/systemd/system/docker.service
Docker配置¶
加速器配置: 阿里云为例, https://cr.console.aliyun.com/cn-qingdao/instances/mirrors
下载镜像: 以Jenkins镜像为例
镜像搜索:
因为Jenkins镜像没有latest版本, 所以在pull的时候需要跟tag号
[root@localhost opt]# docker pull jenkins:2.60.3 2.60.3: Pulling from library/jenkins 55cbf04beb70: Pull complete 1607093a898c: Pull complete 9a8ea045c926: Pull complete d4eee24d4dac: Pull complete c58988e753d7: Pull complete 794a04897db9: Pull complete 70fcfa476f73: Pull complete 0539c80a02be: Pull complete 54fefc6dcf80: Pull complete 911bc90e47a8: Pull complete 38430d93efed: Pull complete 7e46ccda148a: Pull complete c0cbcb5ac747: Pull complete 35ade7a86a8e: Pull complete aa433a6a56b1: Pull complete 841c1dd38d62: Pull complete b865dcb08714: Pull complete 5a3779030005: Pull complete 12b47c68955c: Pull complete 1322ea3e7bfd: Pull complete Digest: sha256:eeb4850eb65f2d92500e421b430ed1ec58a7ac909e91f518926e02473904f668 Status: Downloaded newer image for jenkins:2.60.3 docker.io/library/jenkins:2.60.3 [root@localhost opt]# [root@localhost opt]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE hello-world latest bf756fb1ae65 14 months ago 13.3kB jenkins 2.60.3 cd14cecfdb3a 2 years ago 696MB [root@localhost opt]#
Docker常用命令¶
- docker images: 查看已安装的docker镜像
- docker image rm
: 删除镜像 - docker pull [OPTIONS] NAME[:TAG|@DIGEST]: 获取镜像
- docker search: 从仓库搜索镜像
- docker exec –it
bash : 进入docker容器内部 - docker run: 运行docker镜像
- docker ps: 查看运行容器进程
- docker run –d: 在后台运行docker镜像
- docker run –p 3306:3306: 端口映射
- docker stop
：停止正在运行的容器
将容器中的数据目录挂载到宿主机¶
以Jenkins镜像为例
启动Jenkins镜像
[root@localhost local]# docker run -d --name jenkins -p 8080:8080 -p 50000:50000 jenkins:2.60.3 825cd4485f22ac775f224dbbc4cab69b59b79cb812ed511bdb318f6ab7f9233f [root@localhost local]#
将容器中的/var/jenkins_home/userContent目录复制到宿主机中/usr/local/jenkins/userContent
[root@localhost local]# mkdir /usr/local/jenkins [root@localhost local]# docker cp jenkins:/var/jenkins_home/userContent /usr/local/jenkins/userContent [root@localhost local]# ls -al /usr/local/jenkins/ total 0 drwxr-xr-x 3 root root 25 Mar 10 10:20 . drwxr-xr-x. 13 root root 146 Mar 10 10:19 .. drwxr-xr-x 2 root root 24 Mar 10 10:14 userContent [root@localhost local]#
停止前面运行的容器
[root@localhost local]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 825cd4485f22 jenkins:2.60.3 "/bin/tini -- /usr/l…" 8 minutes ago Up 8 minutes 0.0.0.0:8080->8080/tcp, 0.0.0.0:50000->50000/tcp jenkins [root@localhost local]# docker stop 825cd4485f22 825cd4485f22 [root@localhost local]#
再次运行容器, 添加挂载命令
[root@localhost local]# docker run -d --name jenkins -p 8080:8080 -p 50000:50000 -v /usr/local/jenkins/userContent:/var/jenkins_home/userContent jenkins:2.60.3 docker: Error response from daemon: Conflict. The container name "/jenkins" is already in use by container "825cd4485f22ac775f224dbbc4cab69b59b79cb812ed511bdb318f6ab7f9233f". You have to remove (or rename) that container to be able to reuse that name. See 'docker run --help'. [root@localhost local]# docker rm -f jenkins jenkins [root@localhost local]# [root@localhost local]# [root@localhost local]# docker run -d --name jenkins -p 8080:8080 -p 50000:50000 -v /usr/local/jenkins/userContent:/var/jenkins_home/userContent jenkins:2.60.3 17755738c01e84d00ac25eeee06582111e52f8a2f283deb068aa92b827fd7535 [root@localhost local]#
确认挂载成功, 修改宿主机的/usr/local/jenkins/userContent/目录中的readme.txt文件, 查看容器中文件是否被修改
[root@localhost local]# cd /usr/local/jenkins/userContent/ [root@localhost userContent]# ls -al total 4 drwxr-xr-x 2 root root 24 Mar 10 10:14 . drwxr-xr-x 3 root root 25 Mar 10 10:20 .. -rw-r--r-- 1 root root 82 Mar 10 10:14 readme.txt [root@localhost userContent]# cat readme.txt Files in this directory will be served under your http://yourjenkins/userContent/ [root@localhost userContent]# echo ============= >> readme.txt [root@localhost userContent]# cat readme.txt Files in this directory will be served under your http://yourjenkins/userContent/ ============= [root@localhost userContent]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 17755738c01e jenkins:2.60.3 "/bin/tini -- /usr/l…" About a minute ago Up About a minute 0.0.0.0:8080->8080/tcp, 0.0.0.0:50000->50000/tcp jenkins [root@localhost userContent]# docker exec -it 17755738c01e bash jenkins@17755738c01e:/$ cd /var/jenkins_home/userContent/ jenkins@17755738c01e:~/userContent$ ls -al total 8 drwxr-xr-x 2 root root 24 Mar 10 02:14 . drwxr-xr-x 13 jenkins jenkins 4096 Mar 10 02:27 .. -rw-r--r-- 1 root root 96 Mar 10 02:27 readme.txt jenkins@17755738c01e:~/userContent$ cat readme.txt Files in this directory will be served under your http://yourjenkins/userContent/ ============= jenkins@17755738c01e:~/userContent$
使用registry镜像创建本地仓库¶
拉取registry镜像
[root@localhost ~]# docker pull registry Using default tag: latest latest: Pulling from library/registry 0a6724ff3fcd: Pull complete d550a247d74f: Pull complete 1a938458ca36: Pull complete acd758c36fc9: Pull complete 9af6d68b484a: Pull complete Digest: sha256:d5459fcb27aecc752520df4b492b08358a1912fcdfa454f7d2101d4b09991daa Status: Downloaded newer image for registry:latest docker.io/library/registry:latest [root@localhost ~]# [root@localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE registry latest 678dfa38fcfa 2 months ago 26.2MB
在/usr/lib/systemd/system/docker.service文件的ExecStart字段中增加–insecure-registry <ip>:5000配置, 其中<ip>为当前系统的IP地址
[root@localhost ~]# cat /usr/lib/systemd/system/docker.service [Unit] Description=Docker Application Container Engine Documentation=https://docs.docker.com After=network-online.target firewalld.service containerd.service Wants=network-online.target Requires=docker.socket containerd.service [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 --insecure-registry 172.20.3.139:5000 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 # kill only the docker process, not all processes in the cgroup KillMode=process OOMScoreAdjust=-500 [Install] WantedBy=multi-user.target [root@localhost ~]#
重启docker服务
[root@localhost ~]# systemctl daemon-reload [root@localhost ~]# systemctl restart docker
运行容器
[root@localhost ~]# mkdir /usr/local/registry [root@localhost ~]# [root@localhost ~]# docker run -d -p 5000:5000 -v /usr/local/registry:/var/lib/registry registry 2e58f8e33125403ea814bd6b3f67912d7512bb673ed3c552953059b75ac4c6f1 [root@localhost ~]# [root@localhost ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 2e58f8e33125 registry "/entrypoint.sh /etc…" 4 seconds ago Up 3 seconds 0.0.0.0:5000->5000/tcp agitated_kalam
拉取一个Jenkins容器
[root@localhost ~]# docker pull jenkins:2.60.3 2.60.3: Pulling from library/jenkins 55cbf04beb70: Pull complete 1607093a898c: Pull complete 9a8ea045c926: Pull complete d4eee24d4dac: Pull complete c58988e753d7: Pull complete 794a04897db9: Pull complete 70fcfa476f73: Pull complete 0539c80a02be: Pull complete 54fefc6dcf80: Pull complete 911bc90e47a8: Pull complete 38430d93efed: Pull complete 7e46ccda148a: Pull complete c0cbcb5ac747: Pull complete 35ade7a86a8e: Pull complete aa433a6a56b1: Pull complete 841c1dd38d62: Pull complete b865dcb08714: Pull complete 5a3779030005: Pull complete 12b47c68955c: Pull complete 1322ea3e7bfd: Pull complete Digest: sha256:eeb4850eb65f2d92500e421b430ed1ec58a7ac909e91f518926e02473904f668 Status: Downloaded newer image for jenkins:2.60.3 docker.io/library/jenkins:2.60.3 [root@localhost ~]# [root@localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE registry latest 678dfa38fcfa 2 months ago 26.2MB jenkins 2.60.3 cd14cecfdb3a 2 years ago 696MB [root@localhost ~]#
在本地host上, 重命名镜像, 上传到本地仓库中, 添加新的tag, 使之与registry相匹配
[root@localhost ~]# docker tag jenkins:2.60.3 172.20.3.139:5000/jenkins_test [root@localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE registry latest 678dfa38fcfa 2 months ago 26.2MB 172.20.3.139:5000/jenkins_test latest cd14cecfdb3a 2 years ago 696MB jenkins 2.60.3 cd14cecfdb3a 2 years ago 696MB [root@localhost ~]# [root@localhost ~]# docker push 172.20.3.139:5000/jenkins_test Using default tag: latest The push refers to repository [172.20.3.139:5000/jenkins_test] 0577e068c587: Pushed b1891bf16fa7: Pushed 37c1d818eb0b: Pushed d51e4482f53a: Pushed ceed640cbb93: Pushed 047f9c957a2e: Pushed 1db731634011: Pushed a0775f499ef1: Pushed c19390bb619a: Pushed 6ff38243bfb8: Pushed 9fe468dbb76f: Pushed 571ae0d6961a: Pushed 518c9e7eb326: Pushed c3ebb2aa7787: Pushed 9c2e8b91bfa8: Pushed c477b6c8ca45: Pushed fa0c3f992cbd: Pushed ce6466f43b11: Pushed 719d45669b35: Pushed 3b10514a95be: Pushed latest: digest: sha256:0de43cde2c4b864a8e4a84bbd9958e47c5d851319f118203303d040b0a74f159 size: 4501 [root@localhost ~]#
删除本地镜像, 重新从本地仓库拉取
[root@localhost ~]# docker rmi 172.20.3.139:5000/jenkins_test:latest Untagged: 172.20.3.139:5000/jenkins_test:latest Untagged: 172.20.3.139:5000/jenkins_test@sha256:0de43cde2c4b864a8e4a84bbd9958e47c5d851319f118203303d040b0a74f159 [root@localhost ~]# [root@localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE registry latest 678dfa38fcfa 2 months ago 26.2MB jenkins 2.60.3 cd14cecfdb3a 2 years ago 696MB [root@localhost ~]# [root@localhost ~]# docker pull 172.20.3.139:5000/jenkins_test Using default tag: latest latest: Pulling from jenkins_test Digest: sha256:0de43cde2c4b864a8e4a84bbd9958e47c5d851319f118203303d040b0a74f159 Status: Downloaded newer image for 172.20.3.139:5000/jenkins_test:latest 172.20.3.139:5000/jenkins_test:latest [root@localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE registry latest 678dfa38fcfa 2 months ago 26.2MB 172.20.3.139:5000/jenkins_test latest cd14cecfdb3a 2 years ago 696MB jenkins 2.60.3 cd14cecfdb3a 2 years ago 696MB [root@localhost ~]#
可以在浏览器中访问http://172.20.3.139:5000/v2/_catalog查看镜像上传日志
Jenkins中的slave使用docker¶
配置docker服务器
在/usr/lib/systemd/system/docker.service文件中的ExecStart增加”-H tcp://0.0.0.0:2375”
ExecStart=/usr/bin/dockerd -H tcp://0.0.0.0:2375 -H fd:// --containerd=/run/containerd/containerd.sock
然后重启服务
systemctl daemon-reload systemctl restart docker
jenkins安装Docker plugin插件
Manage Jenkins -> Configure System -> Cloud 配置docker slave
Add a new cloud -> Docker
配置docker cloud
- Docker Host URI: 配置为tcp://172.20.3.139:2375, 其中的IP为docker服务器的IP, 端口为步骤1中配置的端口
- 点击Test Connection: 测试是否能连接成功, 连接成功后会显示docker服务器的版本
- Enable需要勾选
- 其他配置使用默认值
- 点击Docker Agent templates… -> Add Docker Template
- Labels: 配置docker salve的标签, 在配置Job的时候需要指定这个label
- Enable需要勾选
- Name: 随便指定
- Docker Image: 镜像名称jenkins/ssh-slave:latest, 第一次连接的时候, 如果服务器中没有这个镜像, 则会自动去仓库下载, 目前该镜像测试能正常运行
- Remote File System Root: 设置slave中工作根目录为/home/jenkins
- Usage: 选择Use this node as much as possible
- Connect method: 选择连接方式为Connect with SSH
- SSH key: 选择Inject SSH key
- User: 设置为jenkins, 目前测试该用户名能正常连接
- Pull strategy: pull镜像策略选择Pull once and update latest
- 点击Advanced… -> 配置JavaPath为/usr/local/openjdk-8/bin/java, 如果不配置Java路径, 则在连接docker的时候会默认去PATH环境变量的路径去查找, 如果查找不到则会连接失败
配置JOB时使用Docker
- New Item -> 输入Job名TestDocker -> 选择Freestyle project
- 勾选Restrict where this project can be run, 并在Label Expression中设置Docker-slave, 该label就是在上一步配置cloud的时候设置的
- 配置build步骤
- 保存
执行上一步新建的Job, 可以看到任务在新建的docker容器上运行
去docker服务器上查看docker容器
[root@localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE jenkins/ssh-slave latest fb7b3847769f 11 months ago 514MB [root@localhost ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 28c75644378b jenkins/ssh-slave:latest "setup-sshd /usr/sbi…" 2 minutes ago Up 2 minutes 0.0.0.0:49198->22/tcp silly_volhard [root@localhost ~]# docker exec -it 28c75644378b bash root@28c75644378b:/home/jenkins# ls -al total 1484 drwxr-xr-x 5 jenkins jenkins 124 Mar 18 02:54 . drwxr-xr-x 1 root root 21 Apr 13 2020 .. -rw-r--r-- 1 jenkins jenkins 220 Apr 18 2019 .bash_logout -rw-r--r-- 1 jenkins jenkins 3526 Apr 18 2019 .bashrc drwxr-xr-x 3 jenkins jenkins 17 Mar 18 02:54 .cache -rw-r--r-- 1 jenkins jenkins 807 Apr 18 2019 .profile drwxr-xr-x 4 jenkins jenkins 34 Mar 18 02:54 remoting -rw-r--r-- 1 jenkins jenkins 1506923 Mar 18 02:54 remoting.jar drwxr-xr-x 3 jenkins jenkins 24 Mar 18 02:54 workspace root@28c75644378b:/home/jenkins#
Jenkins中的slave使用基于Centos7, 并且安装自定义软件的docker容器¶
搭建好本地仓库, 拉取Centos7官方镜像
[root@localhost ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES ffd0d6d11c11 registry "/entrypoint.sh /etc…" 25 minutes ago Up 25 minutes 0.0.0.0:5000->5000/tcp lucid_agnesi [root@localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE registry latest 678dfa38fcfa 3 months ago 26.2MB [root@localhost ~]# docker pull centos:7 7: Pulling from library/centos 2d473b07cdd5: Pull complete Digest: sha256:0f4ec88e21daf75124b8a9e5ca03c37a5e937e0e108a255d890492430789b60e Status: Downloaded newer image for centos:7 docker.io/library/centos:7 [root@localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE registry latest 678dfa38fcfa 3 months ago 26.2MB centos 7 8652b9f0cb4c 4 months ago 204MB [root@localhost ~]#
用centos7镜像启动容器
启动命令需要带参数-it, –privileged=true, /sbin/init, 否则后面无法启动SSH服务
[root@localhost ~]# docker run -it -d --privileged=true -p 6000:5000 centos:7 /sbin/init 3babe3df6154f5ea1dbbf5f3ef4e70c417cbd91e32b732a40cada01cf10a68c7 [root@localhost ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 3babe3df6154 centos:7 "/sbin/init" 5 seconds ago Up 5 seconds 0.0.0.0:6000->5000/tcp distracted_lehmann ffd0d6d11c11 registry "/entrypoint.sh /etc…" 30 minutes ago Up 30 minutes 0.0.0.0:5000->5000/tcp lucid_agnesi [root@localhost ~]# docker exec -it 3babe3df6154 bash [root@3babe3df6154 /]#
安装java, ssh服务, 以及其他一些相关工具
yum list java* yum -y install java-1.8.0-openjdk yum -y install openssh-server openssh-clients yum -y install net-tools vim
启动ssh服务
[root@3babe3df6154 /]# systemctl status sshd.service ● sshd.service - OpenSSH server daemon Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled; vendor preset: enabled) Active: inactive (dead) Docs: man:sshd(8) man:sshd_config(5) [root@3babe3df6154 /]# systemctl start sshd.service [root@3babe3df6154 /]# systemctl status sshd.service ● sshd.service - OpenSSH server daemon Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled; vendor preset: enabled) Active: active (running) since Fri 2021-03-19 08:04:41 UTC; 2s ago Docs: man:sshd(8) man:sshd_config(5) Main PID: 366 (sshd) CGroup: /docker/3babe3df6154f5ea1dbbf5f3ef4e70c417cbd91e32b732a40cada01cf10a68c7/system.slice/sshd.service └─366 /usr/sbin/sshd -D ‣ 366 /usr/sbin/sshd -D Mar 19 08:04:41 3babe3df6154 systemd[1]: Starting OpenSSH server daemon... Mar 19 08:04:41 3babe3df6154 sshd[366]: Server listening on 0.0.0.0 port 22. Mar 19 08:04:41 3babe3df6154 sshd[366]: Server listening on :: port 22. Mar 19 08:04:41 3babe3df6154 systemd[1]: Started OpenSSH server daemon. [root@3babe3df6154 /]# systemctl enable sshd.service [root@3babe3df6154 /]# netstat -tlunp Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 366/sshd tcp6 0 0 :::22 :::* LISTEN 366/sshd [root@3babe3df6154 /]#
基于前面修改的容器创建镜像, 镜像名jenkins-slave
[root@localhost ~]# docker commit 3babe3df6154 jenkins-slave sha256:618aba88f6358836bdbd8013bbc9ec4ae17260dfe3a1463fb501d9ee0d26724e [root@localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE jenkins-slave latest 618aba88f635 2 minutes ago 570MB registry latest 678dfa38fcfa 3 months ago 26.2MB centos 7 8652b9f0cb4c 4 months ago 204MB
将镜像上传到本地仓库, 然后删除本地原始镜像
[root@localhost ~]# docker tag jenkins-slave:latest 172.20.3.139:5000/jenkins-slave [root@localhost ~]# docker push 172.20.3.139:5000/jenkins-slave Using default tag: latest The push refers to repository [172.20.3.139:5000/jenkins-slave] f2308b611323: Pushed 174f56854903: Pushed latest: digest: sha256:9f491d52e0d9e00d5b4458b2388bd68de06c243a197206b1ac56608433d8c737 size: 742 [root@localhost ~]# docker rmi jenkins-slave Untagged: jenkins-slave:latest [root@localhost ~]# docker rmi 172.20.3.139:5000/jenkins-slave Untagged: 172.20.3.139:5000/jenkins-slave:latest Untagged: 172.20.3.139:5000/jenkins-slave@sha256:9f491d52e0d9e00d5b4458b2388bd68de06c243a197206b1ac56608433d8c737 Deleted: sha256:618aba88f6358836bdbd8013bbc9ec4ae17260dfe3a1463fb501d9ee0d26724e Deleted: sha256:ccbafe7b80db22222059388be68df054ec1c5b99919769e69ff469141bbfa363 [root@localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE registry latest 678dfa38fcfa 3 months ago 26.2MB centos 7 8652b9f0cb4c 4 months ago 204MB [root@localhost ~]#
修改Jenkins中Docker的配置
修改镜像名
修改用户名为root; 创建了jenkins用户, 但是容器创建好后登录失败, 后续再研究; 另外JavaPath不需要配置, 因为在前面安装Java, 会自动安装到PATH环境变量所在的路径
在Job中直接调度即可, Job运行的时候可以直接在docker服务器上看到下载的镜像和运行的容器
[root@localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE 172.20.3.139:5000/jenkins-slave latest 618aba88f635 9 minutes ago 570MB registry latest 678dfa38fcfa 3 months ago 26.2MB centos 7 8652b9f0cb4c 4 months ago 204MB [root@localhost ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 31f52a6e20bc 172.20.3.139:5000/jenkins-slave "/usr/sbin/sshd -D -…" 20 seconds ago Up 18 seconds 5000/tcp, 0.0.0.0:49193->22/tcp modest_shockley ffd0d6d11c11 registry "/entrypoint.sh /etc…" 55 minutes ago Up 55 minutes 0.0.0.0:5000->5000/tcp lucid_agnesi [root@localhost ~]#
Docker官方链接: https://docs.docker.com/