batch file - How to run a job in Jenkins n-times?

Batch file - How to run a job in Jenkins n-times?

To run a job in Jenkins multiple times, you can use a simple loop within your Jenkins job configuration or script. Here's how you can achieve this using a Jenkins Pipeline script, which gives you more flexibility and control over the execution flow:

Jenkins Pipeline Script Example

pipeline { agent any parameters { // Define parameters if needed // Example: // string(name: 'ITERATIONS', defaultValue: '5', description: 'Number of times to run the job') } stages { stage('Run Job Multiple Times') { steps { script { def iterations = 5 // Default number of times to run the job // Optionally, you can use a parameter for the number of iterations // if (params.ITERATIONS) { // iterations = params.ITERATIONS.toInteger() // } for (int i = 1; i <= iterations; i++) { echo "Running iteration ${i}" // Execute your job here // Example: sh 'your-job-command-or-script' } } } } } }

Explanation:

  1. Pipeline Definition:

    • pipeline { ... }: Defines a Jenkins Pipeline job.

  2. Agent Directive:

    • agent any: Executes the pipeline on any available agent (node).

  3. Parameters:

    • parameters { ... }: Defines parameters that can be passed to the pipeline job. Uncomment and adjust as needed for your specific use case.

  4. Stages:

    • stages { ... }: Defines stages within the pipeline job.

  5. Stage: Run Job Multiple Times:

    • stage('Run Job Multiple Times') { ... }: Defines a stage where the job will run multiple times.

  6. Steps:

    • steps { ... }: Contains steps to be executed within the stage.

  7. Script Block:

    • script { ... }: Executes Groovy script code within the pipeline.

  8. Iterations Loop:

    • for (int i = 1; i <= iterations; i++) { ... }: Loops iterations times. Adjust iterations to the desired number of runs.

  9. Execution:

    • echo "Running iteration ${i}": Outputs the current iteration number.
    • Replace echo with the command to trigger your Jenkins job or shell command/script.

  10. Parameters (Optional):

    • Optionally, use parameters like params.ITERATIONS to customize the number of iterations dynamically.

Usage:

  • Configuration: Copy the pipeline script into your Jenkins job using "Pipeline script" option.
  • Customization: Modify the script as per your specific job requirements and number of iterations.

This pipeline script provides a structured approach to running a Jenkins job multiple times using a loop, allowing you to control the iteration count and customize the job execution based on your needs. Adjust the iterations variable and job execution command (sh 'your-job-command-or-script') to fit your specific Jenkins job configuration.

Examples

  1. How to execute a Jenkins job multiple times using a batch script?

    • Description: Learn how to trigger a Jenkins job multiple times sequentially from a batch script.
    • Code:
      :: Loop to run the Jenkins job 5 times for /l %%i in (1, 1, 5) do ( curl -X POST "http://jenkins-server/job/job-name/build" timeout /t 10 /nobreak > nul )
    • Explanation: This batch script sends 5 POST requests to trigger the Jenkins job named job-name using curl, pausing for 10 seconds between each execution.

  2. How to pass parameters while running a Jenkins job multiple times from a batch script?

    • Description: Understand how to pass parameters dynamically to a Jenkins job executed multiple times via a batch script.
    • Code:
      :: Loop with parameters for /l %%i in (1, 1, 5) do ( curl -X POST "http://jenkins-server/job/job-name/buildWithParameters?param1=value1&param2=value2" timeout /t 10 /nobreak > nul )
    • Explanation: This script demonstrates passing parameters param1 and param2 with specified values to the Jenkins job job-name during each execution.

  3. How to run a Jenkins job n-times with a delay between executions in a batch file?

    • Description: Learn how to run a Jenkins job multiple times with a delay between each execution using a batch script.
    • Code:
      :: Loop with delay for /l %%i in (1, 1, 5) do ( curl -X POST "http://jenkins-server/job/job-name/build" timeout /t 60 /nobreak > nul )
    • Explanation: This example triggers the Jenkins job job-name 5 times with a 60-second delay (timeout /t 60) between each execution.

  4. How to schedule Jenkins job executions at specific intervals using a batch script?

    • Description: Understand how to schedule multiple executions of a Jenkins job at predefined intervals using a batch script.
    • Code:
      :: Loop with schedule for /l %%i in (1, 1, 5) do ( curl -X POST "http://jenkins-server/job/job-name/build" timeout /t 3600 /nobreak > nul )
    • Explanation: This script triggers the Jenkins job job-name 5 times, scheduling each execution to occur hourly (timeout /t 3600) with a 1-hour delay.

  5. How to run a Jenkins job n-times asynchronously from a Windows batch file?

    • Description: Learn how to trigger multiple executions of a Jenkins job concurrently using a Windows batch script.
    • Code:
      :: Asynchronous loop for /l %%i in (1, 1, 5) do ( start /b curl -X POST "http://jenkins-server/job/job-name/build" )
    • Explanation: This batch script starts each Jenkins job execution in the background (start /b), allowing multiple instances of the job job-name to run concurrently.

  6. How to wait for Jenkins job completion before triggering the next iteration from a batch script?

    • Description: Understand how to wait for one execution of a Jenkins job to complete before triggering the next iteration using a batch script.
    • Code:
      :: Sequential execution with wait for /l %%i in (1, 1, 5) do ( curl -X POST "http://jenkins-server/job/job-name/build" :: Wait for completion of previous job execution :wait_loop curl -s "http://jenkins-server/job/job-name/lastBuild/api/json" | findstr /C:"\"building\":true" > nul if errorlevel 1 ( timeout /t 10 /nobreak > nul ) else ( goto :next_iteration ) goto :wait_loop :next_iteration )
    • Explanation: This script triggers the Jenkins job job-name 5 times sequentially, waiting for each execution to complete (findstr /C:"\"building\":true") before proceeding to the next iteration.

  7. How to handle Jenkins job failures and retries in a batch script?

    • Description: Learn how to implement retry logic for failed executions of a Jenkins job using a batch script.
    • Code:
      :: Retry on failure set RETRIES=3 for /l %%i in (1, 1, %RETRIES%) do ( curl -X POST "http://jenkins-server/job/job-name/build" :: Check job status :check_status curl -s "http://jenkins-server/job/job-name/lastBuild/api/json" | findstr /C:"\"result\":\"SUCCESS\"" > nul if errorlevel 1 ( :: Job failed, retry after delay timeout /t 10 /nobreak > nul goto :check_status ) )
    • Explanation: This script attempts to trigger the Jenkins job job-name up to 3 times (RETRIES) and waits for successful completion (findstr /C:"\"result\":\"SUCCESS\"").

  8. How to pass environment variables to Jenkins job executions in a batch script?

    • Description: Understand how to pass environment variables dynamically to Jenkins job executions using a batch script.
    • Code:
      :: Pass environment variables set ENV_VAR=value for /l %%i in (1, 1, 5) do ( curl -X POST "http://jenkins-server/job/job-name/build" --data-urlencode "env_var=%ENV_VAR%" timeout /t 10 /nobreak > nul )
    • Explanation: This script sets ENV_VAR and passes it as an environment variable env_var to the Jenkins job job-name during each execution.

  9. How to log Jenkins job execution details to a file from a batch script?

    • Description: Learn how to capture and log execution details of Jenkins job runs to a file using a batch script.
    • Code:
      :: Log job details for /l %%i in (1, 1, 5) do ( curl -X POST "http://jenkins-server/job/job-name/build" > job_run_%%i.log 2>&1 timeout /t 10 /nobreak > nul )
    • Explanation: This script triggers the Jenkins job job-name 5 times, capturing job execution details into separate log files (job_run_%%i.log) for each iteration.

  10. How to manage Jenkins job executions and status monitoring in a batch script?

    • Description: Understand how to manage and monitor the status of multiple Jenkins job executions using a batch script.
    • Code:
      :: Job management and monitoring set MAX_EXECUTIONS=5 set TIMEOUT_SECONDS=600 set JOB_URL="http://jenkins-server/job/job-name/" for /l %%i in (1, 1, %MAX_EXECUTIONS%) do ( :: Trigger job execution curl -X POST %JOB_URL%build :: Monitor job status :wait_loop curl -s %JOB_URL%lastBuild/api/json | findstr /C:"\"building\":true" > nul if errorlevel 1 ( echo "Job %%i completed successfully" goto :next_iteration ) else ( echo "Waiting for job %%i to complete..." timeout /t %TIMEOUT_SECONDS% /nobreak > nul goto :wait_loop ) :next_iteration )
    • Explanation: This script manages up to 5 executions (MAX_EXECUTIONS) of the Jenkins job job-name, monitors their status, and waits for each execution to complete within a timeout (TIMEOUT_SECONDS).

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