Provide JobScheduler environment variables for SSH sessions

Feature

• Environment variables should be propagated to SSH sessions. This applies to environment variables
  • globally for JobScheduler, e.g. $SCHEDULER_HOST, $SCHEDULER_TCP_PORT etc.
  • individually for tasks, e.g. SCHEDULER_TASK_ID, SCHEDULER_JOB_NAME, job parameters

Implications

• JobScheduler can be configured to prefix environment variables for job parameters and order parameters.
  • The JobScheduler variable scheduler.variable_name_prefix is used to determine a possible prefix.
  • The JITL SSH job respects this setting and creates prefixes accordingly.
• The JITL SSH job will
  • propagate task parameters first and then order parameters which includes a higher precedence of order parameters.
  • JobScheduler global environment variables and task specific environment variables are used from the JVM environment.

Note

• The SSH job comes in 1.9 with two different implementations (JSch and Trilead).
• This ticket works only with JSch which will be the default implementation since 1.10. In 1.9 is Trilead the default.
• To activate JSch in 1.9 you have to configure the ./config/scheduler.xml with the following parameter:

  <param name="jitl.ssh.use_jsch_impl" value="true"/>