Add SSSD support to slurmctld container - #8
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slurmctld resolves users and groups in reservation and partition ACLs via NSS. Without an SSSD NSS source the controller only sees local /etc/passwd, so directory-backed users= scopes fail. Bundle SSSD into the slurmctld layer across 25.11, 26.05, and master for ubuntu and rockylinux variants, matching login/slurmd packages and the shared sssd supervisord program. Use authselect select sssd --force (no with-mkhomedir). Keep the existing privilege model (no user=slurm). Consumers mount /etc/sssd/sssd.conf and must start the container as root for sssd. Without that, sssd goes FATAL and only local passwd entries resolve.
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Summary
The published
slurmctldimage cannot resolve directory users (LDAP/AD via SSSD).slurmctldvalidates names in reservation and partition ACLs with NSS (getpwnam/getgrnam). Login and slurmd images already ship SSSD; the controller does not, so directory-backedusers=scopes fail even when the same users work on login nodes and in slurmdbd.User-visible failure:
slurmctldlog:Reservation request has invalid user <ldap-user>.Evidence in the controller container today:
passwd: files, no/etc/sssd,id <ldap-user>fails. Same user resolves on login.This PR adds embedded SSSD to the
slurmctldlayer across all Slurm versions (25.11, 26.05, master) and OS families (ubuntu24.04, ubuntu26.04, rockylinux9, rockylinux10):authselect select sssd --force(nowith-mkhomedir; controller has no login path)sssdsupervisord program alongside the existingfakesystemdprogramuser=slurm); process UID follows the container UID as beforeSSSD_OPTIONS, mount path, root/securityContextrequirements, and expectedsssdFATAL when unusedAligns with guidance on SlinkyProject/slurm-operator#93: keep the operator identity-provider agnostic; customize the image and mount config via
controller.podSpec. Sites using SSSD need a root container start sosssdcan run.Breaking Changes
N/A for process UID. Image size/deps grow by the SSSD packages. Without a mounted
sssd.conf(or without root),sssdgoes FATAL under supervisord and directory users still do not resolve; local/etc/passwdbehavior is unchanged.Testing Notes
make validate-bakepasses for all bake configssssd.conf/ non-root:slurmctldhealthy,sssdFATAL (expected)sssd.confat/etc/sssd/sssd.conf(root:root 0600) and container as root:id <ldap-user>andscontrol create reservation users=...should succeed