如何在Jenkins Job Builder中通过变量列表实现Multijob项目的动态配置

Hey Archna, welcome to the Jenkins and YAML world! Let's walk through exactly how to set up that dynamic job list using Jenkins Job Builder (JJB) — it's all about leveraging JJB's built-in Jinja2 templating support. Here are two straightforward approaches to achieve what you need:

Approach 1: Direct Loop in the Multijob Projects Section #

This is the simplest way — we'll define a list of your job names, then loop through it directly in the projects block to generate each entry:

# First, define your list of sub-job names as a variable
job_names: ["JobA", "JobB"]

job:
  name: test_job
  project-type: multijob
  builders:
    - multijob:
        name: PhaseOne
        condition: SUCCESSFUL
        projects:
          {% for job in job_names %}
          - name: {{ job }}
            current-parameters: true
          {% endfor %}

How this works:

1. We start by declaring job_names as a list containing your target sub-job names (JobA, JobB).
2. Using Jinja2's {% for %} loop, we iterate over each name in the list. For every iteration, we generate a full job entry with the name set to the current list item and current-parameters: true.
3. When JJB processes this YAML, it will expand the loop into exactly the static project list you're aiming for.

Approach 2: Pre-define a Reusable JobsList Variable #

If you want to explicitly create a JobsList variable first (like you mentioned in your question), you can do that too. This requires enabling Jinja2's do extension to modify lists:

Step 1: Update your JJB Configuration

First, add the jinja2.ext.do extension to your jenkins_jobs.ini file (usually located in /etc/jenkins_jobs/ or your user directory):

[job_builder]
enable_jinja=True
jinja_extensions=jinja2.ext.do
# Keep your other existing config options here

Step 2: Write the Templated YAML

# Define your base list of job names
job_suffixes: ["JobA", "JobB"]

# Create and populate the JobsList variable
{% set JobsList = [] %}
{% for suffix in job_suffixes %}
  {% do JobsList.append({
    'name': suffix,
    'current-parameters': true
  }) %}
{% endfor %}

job:
  name: test_job
  project-type: multijob
  builders:
    - multijob:
        name: PhaseOne
        condition: SUCCESSFUL
        projects: {{ JobsList }}

How this works:

1. We initialize an empty JobsList with {% set %}.
2. Using the {% do %} directive (from the enabled extension), we append a dictionary for each job name in job_suffixes — each dictionary has the required name and current-parameters keys.
3. Finally, we just reference {{ JobsList }} in the projects section, and JJB will expand it into the full list of job entries.

Quick Notes: #

• Make sure your JJB version supports Jinja2 templating (most recent versions do, but double-check if you're on an older install).
• If you need to add other parameters (like git-revision or property-file) for specific jobs, you can adjust the loop logic to handle conditional values too.

内容的提问来源于stack exchange，提问作者Archna Mittal