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Status Future consideration
Workspace Spectrum LSF
Components Scheduling
Created by Guest
Created on Mar 30, 2023

RELATED IDEAS

LSF to control SSH sessions on hosts running LSF jobs

We have many users who need to open an SSH session from their IDE ( VSCode, PyCharm) to a cluster machine running their LSF job so they can debug/troubleshoot/test in realtime in an interactive session.  While battach works to connect to a cluster machine running a batch job, we would like LSF to offer the functionality of battach, but for an actual SSH session.  In another HPC cluster, we run Slurm and we use the SSH functionality built-in to slurm ( https://slurm.schedmd.com/pam_slurm_adopt.html ) to meet the user requirement.  We would like LSF to provide this kind of functionality.

Needed By Quarter
  • Guest
    Reply
    |     Apr 6, 2023

    Hi Bill -

    Thank you for the suggestion. We actually are using the pam_lsf plug-in today to allow users to SSH to a node running their LSF job. It works great! For us, the missing piece is the work of managing the SSH connection and associated processes once the SSH session is established including attaching to the cgroups of the LSF job on the node and then terminating/cleaning up all associated processes when the job is done/terminated. To borrow from the Slurm description, "...to track the ssh connection and any other spawned processes for accounting and to ensure complete job cleanup when the job is completed". Allowing the SSH to connect is solved with the pam_lsf plugin.

    Thanks again for the reply!

  • Admin
    Bill McMillan
    Reply
    |     Apr 6, 2023

    https://github.com/IBMSpectrumComputing/lsf-plugins/tree/master/pam_lsf
    is an existing plugin that controls login to the node and allows a user to login if they have a job running there

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