Essential plugins list in Jenkins - Step-by-Step Execution

Process Flow - Essential plugins list

Start Jenkins

↓

Access Plugin Manager

↓

Browse Available Plugins

↓

Select Essential Plugins

↓

Install Plugins

↓

Restart Jenkins if needed

↓

Plugins Ready for Use

This flow shows how to find and install essential Jenkins plugins step-by-step.

Execution Sample

Jenkins

plugin_list = [
  "Git",
  "Pipeline",
  "Credentials",
  "Blue Ocean",
  "Docker",
  "Slack Notification"
]
for plugin in plugin_list:
  install_plugin(plugin)

This code simulates installing a list of essential Jenkins plugins one by one.

Process Table

Step	Plugin Selected	Action	Installation Status	Jenkins State
1	Git	Start installation	Installing	Plugins installing
2	Git	Complete installation	Installed	Git plugin ready
3	Pipeline	Start installation	Installing	Plugins installing
4	Pipeline	Complete installation	Installed	Pipeline plugin ready
5	Credentials	Start installation	Installing	Plugins installing
6	Credentials	Complete installation	Installed	Credentials plugin ready
7	Blue Ocean	Start installation	Installing	Plugins installing
8	Blue Ocean	Complete installation	Installed	Blue Ocean plugin ready
9	Docker	Start installation	Installing	Plugins installing
10	Docker	Complete installation	Installed	Docker plugin ready
11	Slack Notification	Start installation	Installing	Plugins installing
12	Slack Notification	Complete installation	Installed	Slack Notification plugin ready
13	All plugins installed	Check if restart needed	Restart recommended	Waiting for restart
14	Restart Jenkins	Perform restart	Restarted	Jenkins ready with plugins

💡 All essential plugins installed and Jenkins restarted to apply changes.

Status Tracker

Variable	Start	After 1	After 2	After 3	After 4	After 5	After 6	Final
plugin	None	Git	Pipeline	Credentials	Blue Ocean	Docker	Slack Notification	None
installation_status	None	Installed	Installed	Installed	Installed	Installed	Installed	All Installed
jenkins_state	Starting	Git plugin ready	Pipeline plugin ready	Credentials plugin ready	Blue Ocean plugin ready	Docker plugin ready	Slack Notification plugin ready	Ready

Key Moments - 3 Insights

Why do we need to restart Jenkins after installing plugins?

Jenkins needs to restart to load the new plugins properly, as shown in execution_table step 13 and 14.

Can we use plugins immediately after installation without restart?

Usually no, because Jenkins must reload its system to activate plugins, which happens after restart (step 14).

What happens if a plugin installation fails?

The installation status would not change to 'Installed' and Jenkins state would not update, so the plugin won't be ready.

Visual Quiz - 3 Questions

Look at the execution table, what is the Jenkins state after installing the Docker plugin?

A Plugins installing

B Slack Notification plugin ready

C Docker plugin ready

D Waiting for restart

💡 Hint

Check the Jenkins State column at step 10 where Docker installation completes.

At which step does Jenkins recommend a restart?

A Step 13

B Step 14

C Step 12

D Step 10

💡 Hint

Look for 'Restart recommended' in the Installation Status column.

If the 'Pipeline' plugin installation failed, what would be the installation status at step 4?

A Installed

B Failed

C Installing

D Not started

💡 Hint

Consider what happens if installation does not complete successfully at step 4.

Concept Snapshot

Essential Jenkins plugins improve functionality.
Use Plugin Manager to browse and install.
Common plugins: Git, Pipeline, Credentials, Blue Ocean, Docker, Slack.
Restart Jenkins after installation to activate plugins.
Check plugin status in Plugin Manager.

Full Transcript

This visual guide shows how to install essential Jenkins plugins step-by-step. First, Jenkins is started and the Plugin Manager is accessed. Then, plugins like Git, Pipeline, Credentials, Blue Ocean, Docker, and Slack Notification are selected and installed one by one. Each plugin installation starts and completes, updating Jenkins state. After all plugins are installed, Jenkins recommends a restart to activate them. Restarting Jenkins completes the process, making plugins ready for use. Key points include the need to restart Jenkins after plugin installation and what happens if installation fails.

Practice

1. Which Jenkins plugin is essential for integrating Git repositories?

easy

A. Git plugin

B. Docker plugin

C. Slack Notification plugin

D. Pipeline plugin

Solution

1. Step 1: Understand plugin purpose

   The Git plugin allows Jenkins to connect and pull code from Git repositories.

2. Step 2: Compare with other plugins

   Docker plugin manages containers, Slack plugin sends messages, Pipeline plugin manages workflows.

3. Final Answer:

   Git plugin -> Option A

4. Quick Check:

   Git integration = Git plugin [OK]

Hint: Git repo needs Git plugin for Jenkins [OK]

Common Mistakes:

• Confusing Docker plugin with Git plugin
• Choosing Pipeline plugin for Git integration
• Selecting Slack plugin for code management

2. Which of the following is the correct syntax to install a Jenkins plugin using the CLI?

easy

A. java -jar jenkins-cli.jar install-plugin git

B. jenkins install plugin git

C. jenkins-cli install-plugin git

D. install-plugin jenkins git

Solution

1. Step 1: Recall Jenkins CLI usage

   Jenkins CLI commands run via java -jar jenkins-cli.jar followed by the command.

2. Step 2: Identify correct install-plugin command

   The correct syntax is: java -jar jenkins-cli.jar install-plugin plugin-name

3. Final Answer:

   java -jar jenkins-cli.jar install-plugin git -> Option A

4. Quick Check:

   Jenkins CLI uses java -jar jenkins-cli.jar [OK]

Hint: Use java -jar jenkins-cli.jar for plugin install [OK]

Common Mistakes:

• Omitting 'java -jar' part
• Wrong command order
• Using incomplete CLI commands

3. What will happen if you install the 'Pipeline' plugin in Jenkins?

medium

A. It sends notifications to Slack channels.

B. Jenkins will automatically deploy applications to cloud.

C. It enables Jenkins to connect to Git repositories.

D. You can create and manage complex build workflows using code.

Solution

1. Step 1: Understand Pipeline plugin function

   The Pipeline plugin lets users define build workflows as code, making complex automation easier.

2. Step 2: Eliminate unrelated options

   Automatic deployment is not a Pipeline feature, Git connection is from Git plugin, Slack notifications from Slack plugin.

3. Final Answer:

   You can create and manage complex build workflows using code. -> Option D

4. Quick Check:

   Pipeline = workflow as code [OK]

Hint: Pipeline plugin = build workflows as code [OK]

Common Mistakes:

• Confusing Pipeline with deployment plugins
• Mixing Git plugin with Pipeline
• Assuming Slack notifications come from Pipeline

4. You installed the 'Git' plugin but Jenkins cannot clone repositories. What is the likely cause?

medium

A. The Git plugin is outdated and needs updating.

B. You forgot to install the 'Credentials' plugin for authentication.

C. The Pipeline plugin is missing.

D. Jenkins needs a restart after plugin installation.

Solution

1. Step 1: Identify authentication needs

   Git plugin requires credentials plugin to manage authentication for private repos.

2. Step 2: Check other options

   Outdated plugin may cause issues but less common; Pipeline plugin unrelated; restart helpful but not always required.

3. Final Answer:

   You forgot to install the 'Credentials' plugin for authentication. -> Option B

4. Quick Check:

   Git needs Credentials plugin for auth [OK]

Hint: Git plugin needs Credentials plugin for private repos [OK]

Common Mistakes:

• Assuming restart fixes cloning
• Ignoring missing credentials plugin
• Confusing Pipeline plugin role

5. You want Jenkins to notify your team on Slack after every build. Which plugin combination is essential?

hard

A. Git plugin and Pipeline plugin

B. Docker plugin and Slack Notification plugin

C. Slack Notification plugin and Credentials plugin

D. Pipeline plugin and Credentials plugin

Solution

1. Step 1: Identify notification plugin

   The Slack Notification plugin sends messages to Slack channels after builds.

2. Step 2: Recognize need for Credentials plugin

   Credentials plugin manages authentication tokens needed for Slack integration.

3. Final Answer:

   Slack Notification plugin and Credentials plugin -> Option C

4. Quick Check:

   Slack notifications need Slack + Credentials plugins [OK]

Hint: Slack notifications require Slack and Credentials plugins [OK]

Common Mistakes:

• Choosing unrelated plugins like Git or Docker
• Ignoring Credentials plugin for auth
• Assuming Pipeline plugin sends notifications