Schedule Jenkins Job to Run on Alternate Weeks: A Comprehensive Guide

Introduction to Jenkins and Scheduling Jobs

Jenkins is an open-source automation server that enables developers to build, test, and deploy their software projects continuously. It is one of the most popular tools for continuous integration and continuous delivery (CI/CD) with a large and active community. Jenkins provides a wide range of plugins to support building and testing applications in various languages and platforms.

Scheduling Jenkins Jobs

Jenkins allows users to schedule jobs to run at specific times or intervals. This feature is useful for automating repetitive tasks, such as running tests, building packages, or deploying applications. Users can schedule jobs to run at a particular time of the day, week, or month or based on specific events or triggers.

Scheduling Jenkins Jobs to Run Alternate Weeks

By default, Jenkins does not provide an option to schedule jobs to run alternate weeks. However, users can achieve this by using the "Quartz Scheduler plugin" and configuring the job to run based on a cron expression that runs every other week.

Installing the Quartz Scheduler Plugin

To install the plugin, follow these steps:

1. Go to the Jenkins dashboard.
2. Click on "Manage Jenkins".
3. Click on "Manage Plugins".
4. Go to the "Available" tab.
5. Search for "Quartz Scheduler Plugin" and install it.

Configuring a Job to Run Alternate Weeks

To configure a job to run alternate weeks, follow these steps:

1. Create a new job or edit an existing one.
2. Go to the "Build Triggers" section.
3. Check the "Build periodically" option.
4. Enter the following cron expression to run the job every other week:

The expression breaks down as follows:

• H H 0 * 1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31: This expression specifies that the job should run at the start of every hour, on the 1st, 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, 19th, 21st, 23rd, 25th, 27th, 29th, and 31st days of the month.
• The first field (H) specifies that the job should run at any hour.
• The second field (H) specifies that the job should run every hour.
• The third field (0) specifies that the job should run at the start of every hour.
• The fourth field (\* 1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31) specifies that the job should run on the specified days of the month, which ensures that the job runs every other week.

Jenkins provides a powerful scheduling feature that enables users to automate repetitive tasks. By using the Quartz Scheduler plugin, users can configure jobs to run alternate weeks. With this feature, users can optimize their resources, reduce manual intervention, and improve the reliability and efficiency of their CI/CD pipelines.

• Jenkins website
• Quartz Scheduler Plugin
• Cron syntax documentation

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