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我在尝试在容器中安装Jenkins时，初衷是希望使用docker in docker 的模式来实现Jenkins slave容器按需创建。在实现的时候需要在Jenkins 中安装Kubernetes插件。
kubernetes的插件目前来看存在一个Bug，这个bug很小但是会导致我们无法设置和kubernetes mastert认证的机制。Bug是由于配置代理时候是用的IP地址，但是jenkins必须加入http协议，可惜的是加入http协议后更新的代理又不能使用了，进入这种死循环了。所以这种方案暂时搁置。
我在写这篇文章的时候，Jenkins X 还没有出来。。。目前Jenkins 是拥抱了K8S； 我认为CI CD环境容器化编排是大趋势。
一些实践
搭建过基于K8S的完整的平台，写了系列的文章总结。有些小的团队或者独立开发者，单独一个Jenkins和Gitlab就足够做编译自动化了。
So，这里我会写常用的实现自动化部署的方案之Jenkins+Gitlab这种模式，在小型的开发时候完全够用了，从来没有一致的最佳方案，只有适不适合咱们的团队方案。
Jenkins的安装 - 官网
RedHat Linux RPM packages for Jenkins - https://pkg.jenkins.io/redhat-stable/
To use this repository, run the following command:
sudo wget -O /etc/yum.repos.d/jenkins.repo https://pkg.jenkins.io/redhat-stable/jenkins.repo
sudo rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io.key
If you've previously imported the key from Jenkins, the "rpm --import" will fail because you already have a key. Please ignore that and move on.
You will need to explicitly install a Java runtime environment, because Oracle's Java RPMs are incorrect and fail to register as providing a java dependency. Thus, adding an explicit dependency requirement on Java would force installation of the OpenJDK JVM.
2.54 (2017-04) and newer: Java 8
1.612 (2015-05) and newer: Java 7
With that set up, the Jenkins package can be installed with:
yum install jenkins
See Wiki for more information, including how Jenkins is run and where the configuration is stored, etc.
Gitlab的安装
自己网上找吧，但是安装8.0+的版本，因为后面webhooks是有版本的要求的。
自动化部署配置
创建普通编译Job
Jenkins创建一个Job，并配置git信息
注意，这里连接Gitlab需要配置认证
同时，保证jenkins机器安装了Java， maven。
Maven 中需要配置成我们自己的仓库，配置settings.xm即可。
[root@jenkins ~]# find / -name settings.xml
/etc/maven/settings.xml
/var/lib/jenkins/.m2/settings.xml
/usr/share/maven/conf/settings.xml
[root@jenkins ~]# cat /usr/share/maven/conf/settings.xml
更改成公司artificatory配置
<mirror>
<id>mirrorId_2</id>
<mirrorOf>*</mirrorOf>
<name>Human Readable Name for this Mirror.</name>
<url>http://maven.aliyun.com/nexus/content/groups/public/</url>
</mirror>-->
<mirror>
<id>mirrorId_1</id>
<mirrorOf>*</mirrorOf>
<name>Human Readable Name for this Mirror.</name>
<url>http://your_ip:your_port/artifactory/list/maven2/</url>
</mirror>
加入CI Trigger功能
Jenkins Trigger配置
Gitlab配置webhook
测试webhook：
加入CD功能
自动化运行脚本编写
[root@jenkins ~]# cat run.sh
#!/bin/bash
echo 'Checking scic document system status...'
SCIC_APP_PID=$(ps -ef | grep scic_paas_doc | grep -v grep | awk '{ print $2 }')
if [ -z "$SCIC_APP_PID" ]
then
echo Starting scic document...
nohup java -jar scic_paas_doc-0.0.1-RELEASE.jar > doc.log 2>&1 &
echo Started successfully.
else
echo killing old service - $SCIC_APP_PID ...
kill $SCIC_APP_PID
echo Restarting scic document...
nohup java -jar scic_paas_doc-0.0.1-RELEASE.jar > doc.log 2>&1 &
echo Restarted successfully.
fi
Global配置SSH Server
Build Job中配置PostBuild，Over SSH
通过SSH上传jar，并使用脚本运行
更新并提交代码
Z003MRZB@AAECNSHA02921L MINGW64 /d/git/k8s/scic_paas_doc (master)
$ git add .
warning: LF will be replaced by CRLF in src/main/resources/static/_sidebar.md.
The file will have its original line endings in your working directory.
Z003MRZB@AAECNSHA02921L MINGW64 /d/git/k8s/scic_paas_doc (master)
$ git commit
warning: LF will be replaced by CRLF in src/main/resources/static/_sidebar.md.
The file will have its original line endings in your working directory.
[master warning: LF will be replaced by CRLF in src/main/resources/static/_sidebar.md.
The file will have its original line endings in your working directory.
50c1cc4] test trigger
warning: LF will be replaced by CRLF in src/main/resources/static/_sidebar.md.
The file will have its original line endings in your working directory.
1 file changed, 1 insertion(+), 1 deletion(-)
Z003MRZB@AAECNSHA02921L MINGW64 /d/git/k8s/scic_paas_doc (master)
$ git push
Counting objects: 7, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (6/6), done.
Writing objects: 100% (7/7), 499 bytes | 0 bytes/s, done.
Total 7 (delta 5), reused 0 (delta 0)
To git@10.192.29.91:k8s_test/scic_paas_doc.git
63b8ff4..50c1cc4 master -> master
触发编译和自动化部署
Tigger Build Logs
Started by GitLab push by daipeng
Building in workspace /var/lib/jenkins/workspace/SCIC_DOC_TRIGGER_BUILD
> git rev-parse --is-inside-work-tree # timeout=10
Fetching changes from the remote Git repository
> git config remote.origin.url git@10.192.29.91:k8s_test/scic_paas_doc.git # timeout=10
Fetching upstream changes from git@10.192.29.91:k8s_test/scic_paas_doc.git
> git --version # timeout=10
using GIT_SSH to set credentials jenkins master server key
> git fetch --tags --progress git@10.192.29.91:k8s_test/scic_paas_doc.git +refs/heads/*:refs/remotes/origin/*
> git rev-parse remotes/origin/master^{commit} # timeout=10
> git branch -a -v --no-abbrev --contains 50c1cc4499394d70919a470db5961cec00e65457 # timeout=10
Checking out Revision 50c1cc4499394d70919a470db5961cec00e65457 (origin/master)
Commit message: "test trigger"
> git config core.sparsecheckout # timeout=10
> git checkout -f 50c1cc4499394d70919a470db5961cec00e65457
> git rev-list 99d919b08d5a2010fe750d4d920a10024401bc92 # timeout=10
[SCIC_DOC_TRIGGER_BUILD] $ /bin/sh -xe /tmp/jenkins3779972667920467885.sh
+ mvn package
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building pass_doc 0.0.1-RELEASE
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ scic_paas_doc ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO] Copying 71 resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ scic_paas_doc ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ scic_paas_doc ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory /var/lib/jenkins/workspace/SCIC_DOC_TRIGGER_BUILD/src/test/resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ scic_paas_doc ---
[INFO] No sources to compile
[INFO]
[INFO] --- maven-surefire-plugin:2.18.1:test (default-test) @ scic_paas_doc ---
[INFO] No tests to run.
[INFO]
[INFO] --- maven-jar-plugin:2.6:jar (default-jar) @ scic_paas_doc ---
[INFO] Building jar: /var/lib/jenkins/workspace/SCIC_DOC_TRIGGER_BUILD/target/scic_paas_doc-0.0.1-RELEASE.jar
[INFO]
[INFO] --- spring-boot-maven-plugin:1.4.1.RELEASE:repackage (default) @ scic_paas_doc ---
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.695s
[INFO] Finished at: Fri Jul 28 09:15:43 CST 2017
[INFO] Final Memory: 16M/237M
[INFO] ------------------------------------------------------------------------
SSH: Connecting from host [jenkins]
SSH: Connecting with configuration [PAAS_DOC_SERVER_200] ...
SSH: EXEC: STDOUT/STDERR from command [/root/run.sh] ...
Checking scic document system status...
killing old service - 19970 ...
Restarting scic document...
Restarted successfully.
SSH: EXEC: completed after 200 ms
SSH: Disconnecting configuration [PAAS_DOC_SERVER_200] ...
SSH: Transferred 1 file(s)
Finished: SUCCESS
查看网站更新
发现确实已经更新 啦。
参考文档
https://jenkins.io/doc/pipeline/tour/hello-world/
https://jenkins.io/user-handbook.pdf
http://www.cnblogs.com/kevingrace/p/5651447.html
http://www.cnblogs.com/ceshi2016/p/6529557.html
http://linuxsogood.org/1539.html