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  • A JobScheduler Master is up and running.
  • The Agent installations are to be performed on any number of servers that have the same operating system. One Agent is to be installed per server.
  • The Agents will be operated with the same user, listening port and installation path.

 

The Batch Installer Application

The Batch Installer is operated by a JobScheduler Master that:

  • connects to the Servers that the Agents are to be installed on and
  • executes the required Agent installations.

The Batch Installer application has two main components:

  • a JobScheduler AgentBatchInstaller job and
  • a JobScheduler universal_agent_installer job chain.

In addition, two XML files are needed for the application:

  • batch_installer_config_file.xml and 
  • yade_agent_batch_installer_settings.xml 

The AgentBatchInstaller job is responsible for creating the JobScheduler orders for the job chain. Each of these orders is named according to the pattern <host>:<port> to convey the host and port of the server where each Agent is to be installed. 

The universal_agent_installer job chain has four job nodes configured in series as follows:

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The individual nodes in the job chain have the following functions:

  • CheckPreRequisite
    • Check for the correct Java version
    • Check whether a JobScheduler Universal Agent already has been installed.
      • If yes, then the Installer:
        • shuts down any instances that are possibly running
        • removes the installation
  • Sync: Wait until all prerequisites have been checked and all instances shut down.
  • TransferInstallationSetup: Transfer the installer files to the host
    • Before the transfer starts, the preprocessor will create the instance start script from the template jobscheduler_agent_instance_script.txt

    • The files that are to be transfered are specified with the <globals><transfer><file_spec=".*\.(sh|gz)$"> configuration element

      • This regular expression causes the following files to be transfered:
        • the JobScheduler Universal Agent installer files: jobscheduler_unix_universal_agent.<version>.tar.gz
        • the instance start script: jobscheduler_agent_<port>.sh
        • the installation script: jobscheduler_universal_agent_install.sh
    • PerformInstall: Start the installation using SSH.
  • The step before transfered installation script will be executed
  • The installation script installs and starts the JobScheduler Universal Agent
    • Finally the post-processing commands will be executed
  • The post-processing commands are specified with the <installation><postprocessing><command> element
  • Three commands will be executed:
    • if you require additional commands, please add the call in the PerformInstall job
    • The default commands set up the autostart for JobScheduler Universal Agent on a Linux server (Ubuntu distribution)
  • echo ${ssh.sudo_password} | sudo -S cp ${install_path}/bin/jobscheduler_agent.sh /etc/init.d/jobscheduler
    • echo ${ssh.sudo_password} | sudo -S update-rc.d jobscheduler defaults
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    Download the Batch Installer and Agent Files

    The following steps have to be carried out. Files can be downloaded from http://www.sos-berlin.com/jobscheduler-downloads

    1. Unix
      • Download the "JobScheduler Universal Agent" tarball for Unix.
      • Download the "Universal Agent Batch Installer". The archive contains the following: 
        • a config/live/batch_installer_agent folder, with the jobs and job chains. Extract these files to the the live folder of the JobScheduler Master: SCHEDULER_DATA/config/live.
        • a config/batch_installer folder with the configuration files for the Batch Installer. Extract these files to the config directory of the JobScheduler Master: SCHEDULER_DATA/config.
        • Copy the JobScheduler Universal Agent installation file to the SCHEDULER_DATA/config/batch_installer folder.
    2. Windows
      • Download the "JobScheduler Universal Agent" for Windows.
      • Download the "Universal Agent Batch Installer". The archive contains the following
        • the config/live/batch_installer_agent folder with the jobs and job chains. Extract these files to the live folder of the JobScheduler Master SCHEDULER_DATA/config/live.
        • the config/batch_installer folder with the configuration files for the Batch Installer. Extract these files to the JobScheduler configuration directory SCHEDULER_DATA/config.
        • Copy the JobScheduler Universal Agent installation file to the folder SCHEDULER_DATA/config/batch_installer.

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