build jenkins 2 CI flow

# 1
docker pull jenkins

# 2 
sudo mkdir /opt/jenkins
sudo chown -R 1000 /opt/jenkins
# http://www.cnblogs.com/jackluo/p/5783116.html

# 3
sudo docker run -d --name jenkinsCI -p 8080:8080 -p 50000:50000 -v /opt/jenkins:/var/jenkins_home:Z --restart=always jenkins/jenkins:lts
link browser URL to jenkins server  
# 4 
sudo docker logs containerID
# find AdminPassword

# jenkins link to deploy vm:
1). install jenkins plugin:
  * Bitbucket Plugin
  * SSH Plugin
  * Copy Artifact Plugin
  * Parameterized Trigger Plugin	
  不確定需不需要，可在測試：
  * SSH Agent Plugin
  * SSH Slaves plugin
  * Publish Over SSH
2). install GCloud SDK curl https://sdk.cloud.google.com | bash
3)  進到 jenkins container 中操作
4). 創建 ssh key, update ssh key to gcp 中繼資料站
5). 透過介面創建 jenkins ssh Credentials , Private Key 使用 Enter directly
6). 建立部署vm的節點（部署 vm 需要先設定一個資料sudo mkdir /opt/jenkins, 並將權限調低 sudo chmod 777 /opt/jenkins/, 安裝壓縮工具 apt-get update, apt-get install zip unzip）
7). install java: http://sourcedigit.com/22256-how-to-install-oracle-java-on-ubuntu-17-04/
8). 完成以上步驟可以建立node 節點
8). 使用 pipeline job 設定及free-style job，git push 觸發 free-style job，在觸發 pipeline job

#https://jenkins.io/doc/pipeline/steps/workflow-basic-steps/#stash-stash-some-files-to-be-used-later-in-the-build