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Introduction

  • Cron is a service daemon available with most Unix operating systems.
    • Cron offers minimal scheduling capabilities by executing an operating system command or script at a given point in time.
    • Cron jobs are configured using a crontab file that is globally available and which can be made available per operating system account.
    • Cron does not consider any job dependencies, job execution results, job history and resource consumption when executing jobs.
  • Cron is frequently used as an entry level to job scheduling. JS7 covers all capabilities available with Cron Jobs.
  • Migration of Cron jobs is carried out from the JS7 Configuration view in the JOC Cockpit using the Convert → cron operation.

Crontab Migration

  • In the JS7 Configuration View click on the button Convert and then select cron.
  • A modal window will open.
  • Add the crontab file (via Drag&Drop or using the choose files for upload button)
  • Open the folder where the generated Workflows and Schedules should be stored.
  • Enter the calendar name of the Calendar which should be assigned to the Schedules.
  • Choose the Agent to run the job.
  • Specify whether the cron file is a system crontab file or a user crontab file.
    • System crontab files contain an account which will be used to run the script.
    • Genreally user crontab files will be executed in the users context and therefore the crontab file will not contain an account name.
    • System crontab

      5 12 * * * root /path_to_file/file.sh >> /path_to_file/file.log 2>&1
    • Users crontab

      5 12 * * * /path_to_file/file.sh >> /path_to_file/file.log 2>&1
  • If required enter the Audit credentials.
  • Click the Button Convert to finish the process.
  • A new Workflow and a Schedule will be generated in the target folder for each cron line in the uploaded crontab file.

Processing

  • A workflow will be generated with one Job containing an ExecutableScript of type ScriptExecutable with the command: /path_to_file/file.sh >> /path_to_file/file.log 2>&1
  • A schedule will be generated with the assigned calendar.
  • The schedule will contain the period(s) and include frequencies based on the cron definition (run at 12:05 each day).

Manual Post Processing

  • All workflows will be generated with the name workflow_cron- followed by an ascending number.
  • All schedules will be generate with the name schedule_cron- followed by an ascending number.
  • The user should make sure that the script has been correctly converted to the job.
  • As all the generated configurations have default names users should rename the configurations according to their needs.



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