CODEWITHSUNDEEP
cluster-computinghpcslurmpam
saladi
saladi

Reputation: 3263

slurm - action_unknown in pam_slurm_adopt

What does "source job" refer to in the description of action_unknown?

action_unknown
The action to perform when the user has multiple jobs on the node
and the RPC does not locate the **source job**. If the RPC mechanism works
properly in your environment, this option will likely be relevant only
when connecting from a login node. Configurable values are:

newest (default)
Pick the newest job on the node. The "newest" job is chosen based
on the mtime of the job's step_extern cgroup; asking Slurm would
require an RPC to the controller. Thus, the memory cgroup must be in
use so that the code can check mtimes of cgroup directories. The user
can ssh in but may be adopted into a job that exits earlier than the
job they intended to check on. The ssh connection will at least be
subject to appropriate limits and the user can be informed of better
ways to accomplish their objectives if this becomes a problem.

allow
Let the connection through without adoption.

deny
Deny the connection.

https://slurm.schedmd.com/pam_slurm_adopt.html

Upvotes: 1

Views: 332

Answers (1)

damienfrancois
damienfrancois

Reputation: 59260

slurm_pam_adopt will try to capture an incoming SSH session into the cgroup corresponding to the job currently running on the host. This option is meant to decide what to do when there are several jobs running for the user that initiates the ssh command.

The 'source job' is the jobid of the process that initiates the ssh call. Typically, if you use an interactive ssh session from the frontend, there is not 'source job', but if the ssh command is run from within a submission script, then the 'source job' is the one corresponding to that submission script.

Upvotes: 2

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