(3.9.0-current) Cluster creation fails on Rocky 9.4

[gmarciani]

Issue description

When using a custom AMI based on Rocky 9.4, the cluster creation will fail because the Munge service fails to start with an error message like the one below:

munged: Error: Keyfile is insecure: group-writable permissions without sticky bit set on "/etc"

This is caused by a known issue in Rocky 9.4 vanilla AMI where the permissions of the folder /etc have been changed from 0755 to 0777.

Affected versions (OSes, schedulers)

All versions of ParallelCluster 3.9.x and later using Rocky 9.4 are impacted.

Mitigation

You can find a detailed explanation and the mitigation of the problem here