[jenkins] cmd

# base
devops (development, operations)
cicd (continuous integration, continuous deployment)
=> ref: https://www.bilibili.com/video/BV1zf4y127vu

# workflow
developer         gitlab         jenkins
    |push---------->|               |
    |               |webhook------->|
    |               |               |trigger
    |               |<----------pull|
    |               |               |build
    |               |<--------notify|
    |               |               |
    |               |               |
    |               |               |

# gitlab
gitlab-ctl status
gitlab-ctl restart

# jenkins
systemctl status jenkins
systemctl restart jenkins
cat /var/lib/jenkins/updates/default.json
cat /var/log/jenkins/jenkins.log
ls -al /var/lib/jenkins/workspace/
ls -al /var/lib/jenkins/workspace/<item-name>
ls -al /var/lib/jenkins/jobs/
ls -al /var/lib/jenkins/jobs/<item-name>
cat /var/lib/jenkins/jobs/<item-name>/config.xml
cat /var/lib/jenkins/jobs/<item-name>/nextBuildNumber

# jenkins job type
free-style (builtin)
maven (by install plugin: Maven Integration)
pipeline (by install plugin: Pipeline)

# jenkins pipeline
groovy
syntax
  declarative pipeline // jenkins 2.x recommended
  scripted pipeline
store in
  jenkins server
  scm server (source code management) // filename 'Jenkinsfile' recommended

# jenkins build trigger
trigger builds remotely (builtin)
build after other projects are built (builtin)
build periodically (builtin)
poll scm (builtin)
build when a change is pushed to gitlab (by install plugin: GitLab Plugin)

# jenkins parameterized
<item-name> | configure | general | v this project is parameterized

# jenkins mail notification
Email Extension Plugin
Email Extension Template
manage jenkins | configure system | extended e-mail notification | content token reference

# [note] gitlab base
one group can contain multi projects
one project doesn't need to be contained in the group

# [note] Whoops, GitLab is taking too much time to respond.
gitlab-ctl status

# [note] jenkins environment variable
http://<ip>:<port>/env-vars.html

# [note] jenkins restart
http://<ip>:<port>/restart

# [note] jenkins add user
manage jenkins | manage users

# [note] jenkins rbac (role-based access control)
manage jenkins | manage plugins | available | install 'Role-based Authorization Strategy'
manage jenkins | configure global security | authorization | choose 'Role-Based Strategy'
manage jenkins | manage and assign roles | manage roles
manage jenkins | manage and assign roles | assign roles
'global role' is used to manage jenkins
'item role' is used to manage item

# [note] jenkins version
manage jenkins | about jenkins

# [note] jenkins log
manage jenkins | system log
=> ref: https://www.jenkins.io/doc/book/system-administration/viewing-logs/

# [note] No credentials found for credentialsId (when gitlab webhook to jenkins)
vi /var/lib/jenkins/jobs/<item-name>/config.xml
delete <jobCredentialId/>
delete <useAlternativeCredential>false</useAlternativeCredential>
=> ref: https://github.com/jenkinsci/gitlab-plugin/issues/992

# [note] learn
=> ref: https://www.bilibili.com/video/BV1kJ411p7mV