Authorization Strategies (Matrix-Based) in Jenkins

Introduction

The Matrix-Based Authorization Strategy in Jenkins is a powerful feature that allows administrators to define fine-grained access control for users and groups. It provides a visual representation of permissions in a matrix format, making it easier to manage access rights across various Jenkins resources.

Matrix Authorization Strategy

This strategy leverages a matrix format where each row represents a user or group, and each column represents a permission. This allows for flexible permission management, enabling or denying access to specific actions on a per-user basis.

Key Concepts

User/Group: An individual user or a collection of users.
Permission: Specific actions that can be performed, such as Read, Write, or Admin.
Matrix: A grid layout where permissions can be assigned to users/groups.

Configuration

To configure the Matrix-Based Authorization Strategy in Jenkins, follow these steps:

Navigate to Manage Jenkins from the Jenkins dashboard.
Select Configure Global Security.
Under Authorization, choose Matrix-based security.
Define users/groups and assign permissions in the matrix.
Click Save to apply changes.

Note: Ensure that users/groups are already created in Jenkins before assigning permissions.

Example Matrix Configuration


| User/Group          | Read | Write | Admin |
|---------------------|------|-------|-------|
| alice               |  ✅  |   ✅  |   ❌  |
| bob                 |  ✅  |   ❌  |   ❌  |
| developers          |  ✅  |   ✅  |   ✅  |
| anonymous           |  ❌  |   ❌  |   ❌  |

Best Practices

When implementing matrix-based authorization, consider the following best practices:

Regularly review and audit permissions.
Minimize the number of users with Admin access.
Use groups for easier permission management.
Document permission changes for accountability.

FAQ

What is a matrix-based authorization strategy?

It is a method used in Jenkins to assign permissions to users or groups in a grid format, allowing for detailed access control across the system.

How do I remove a user's access?

To remove access, simply navigate to the matrix, locate the user, and uncheck the permissions you wish to revoke.

Can I assign permissions to a group?

Yes, you can assign permissions to groups, which is efficient for managing multiple users with similar access needs.