# 2020/09/17 #「Jenkins Pipeline」- Related plug-ins and programming practices

This part of the notes is organized: some plug-ins that will be used in Jenkins Pipeline are used for specific problems and specific scenarios in the Pipeline.

About the content of the notes

This part of the notes only organizes the content related to Jenkins Pipeline, and the content and programming implementation related to Apache Groovy will not be organized into this part. Explain as follows:

1) For connecting to the database, Jenkins Pipeline does not provide (mature and available) plug-ins or methods. We can only use Groovy to connect to the database.
This section will record the problems and solutions of Jenkins Pipeline connecting to the database, as well as simple examples, but Database connection and more code programming practices (such as specifying the connection to use UTF-8 encoding) will be organized into the Apache Groovy section. And this part will also record Groovy programming problems caused by the Jenkins Pipeline environment.

Basic plugin

The "basic plug-in" here refers to the plug-ins that must be installed, or extremely useful plug-ins, which may have been installed by default.

Pipeline Plugin


Plug-in function:	-This is the basic plug-in of Pipeline. To use the Pipeline function, you need to install the plug-in, which allows you to coordinate simple or complex automation.
Plug-in address:	https://plugins.jenkins.io/workflow-aggregator
Step manual:	https://jenkins.io/doc/book/pipeline/
Other links:	https://github.com/jenkinsci/pipeline-plugin

Pipeline Utility Steps


Plug-in function:	-Provides a series of pipeline expansion steps. Such as YAML file processing
Plug-in address:	https://plugins.jenkins.io/pipeline-utility-steps
Step manual:	https://jenkins.io/doc/pipeline/steps/pipeline-utility-steps
Other links:	https://github.com/jenkinsci/pipeline-plugin

File Operations Plugin


Plug-in function:	-File and directory operation plugins, including copy, move, delete, etc. actions
Plug-in address:	https://plugins.jenkins.io/file-operations
Step manual:	https://jenkins.io/doc/pipeline/steps/file-operations/
Other links:	https://github.com/jenkinsci/file-operations-plugin

Pipeline: Groovy

-Pipeline execution engine for CPS conversion based on Groovy script
https://wiki.jenkins.io/display/JENKINS/Pipeline+Groovy+Plugin
https://github.com/jenkinsci/workflow-cps-plugin

# TODO Groovy CPS
https://github.com/cloudbees/groovy-cps

Pipeline: Shared Groovy Libraries

https://plugins.jenkins.io/workflow-cps-global-lib
is a component of the Pipeline Plugin. Provides the ability to use shared libraries to extend Pipeline scripts.

Function plugin

"Functional plug-ins" here refer to plug-ins that implement certain functions, and are related to specific scenarios.

SSH Pipeline Steps


Plug-in function:	-In Pipeline, use SSH commands to perform certain remote operations
Plug-in address:	https://plugins.jenkins.io/ssh-steps
Step manual:	https://jenkins.io/doc/pipeline/steps/ssh-steps/
Other links:	SSH Steps for Jenkins Pipeline: https://jenkins.io/blog/2019/02/06/ssh-steps-for-jenkins-pipeline/

Kubernetes CLI Plugin

https://plugins.jenkins.io/kubernetes-cli
https://github.com/jenkinsci/kubernetes-cli-plugin

You can interact with the k8s cluster in Job, but the kubectl command needs to be installed in the system.

The function of this plug-in is to manage the credentials of the kubectl command, and the k8s cluster still needs to use the kubectl command.

The supported credential types are:

Token, as secrets (see Plain Credentials plugin)
Plain KubeConfig files (see Plain Credentials plugin)
Username and Password (see Credentials plugin)
Certificates (see Credentials plugin)
OpenShift OAuth tokens, as secrets (see Kubernetes Credentials plugin)

When adding a certificate in Jenkin, you can choose the "secret file" type, and then upload the $HOME/.kube/config file.

Last Changes


Plug-in function:	-Output the content of this build change
Plug-in address:	https://plugins.jenkins.io/last-changes
Step manual:	https://jenkins.io/doc/pipeline/steps/last-changes/
Other links:	https://github.com/jenkinsci/last-changes-plugin

instant-messaging


Plug-in function:	-Provide general support for building notifications and bots. The plug-in itself is useless to users and you need to use derivative plug-ins, such as Jabber or IRC plug-ins!
Plug-in address:	https://plugins.jenkins.io/instant-messaging
Step manual:
Other links:	https://github.com/jenkinsci/instant-messaging-plugin

IRC


Plug-in function:	-Provide general support for building notifications and bots. The plug-in itself is useless to users and you need to use derivative plug-ins, such as Jabber or IRC plug-ins!
Plug-in address:	https://plugins.jenkins.io/ircbot
Step manual:	https://jenkins.io/doc/pipeline/steps/ircbot/
Other links:	https://github.com/jenkinsci/ircbot-plugin

Jabber (XMPP) notifier and control


Plug-in function:	-Provide support for XMPP notifications. ! ! ! Currently, it is not supported in PIPELINE because of WIP status.
Plug-in address:	https://plugins.jenkins.io/jabber
Step manual:
Other links:	https://github.com/jenkinsci/jabber-plugin
	https://issues.jenkins-ci.org/browse/JENKINS-36826