Plain update run replaces status.json with a single VM record (incomplete mail + Web UI) #349

Hi,

after a normal CLI run with update the summary mail only contained this:

Ultimate Updater update summary

Nodes:

Guests:
✅ 🐧 100 · vm01
   Up to date

No nodes and none of the other guests. EMAIL_SINGLE_RUNS is false.

status.json right after the run only holds one target (reproducible, before the run it had 16):

$ ultimate-updater check      # status.json: 16 targets
$ update
2026-09-21T18:15:12Z
vm 100 ok success

I think the cause is in UPDATE_CHECK in update.sh. Host and container post-update checks run with STATUS_MODEL_PARTIAL=true, but the VM branch doesn't:

elif [[ "$CVM" == true ]]; then
  ssh -q -p "$SSH_PORT" "$HOSTNAME" "\"$LOCAL_FILES/check-updates.sh\" -u cvm \"$VM\"" | tee -a $LOCAL_FILES/check-output

So check-updates.sh finishes non-partial and STATUS_MODEL_FINISH replaces the whole file with just that VM record. VMs are updated after the containers, so the last VM is the only thing left. The mail (UPDATE_MAIL_BODY -> STATUS_MODEL_RENDER_NOTIFICATION) and the Web UI then work from that reduced file.

Probably enough to pass the flag like in the other branches, e.g.

ssh -q -p "$SSH_PORT" "$HOSTNAME" "STATUS_MODEL_PARTIAL=true \"$LOCAL_FILES/check-updates.sh\" -u cvm \"$VM\""

or call it locally without ssh like the host/container branches do.

Version:

Version overview (develop)

Installed commit: 36d32e09ce05e3e6e174f47bef73399c75773b92
Available commit: 36d32e09ce05e3e6e174f47bef73399c75773b92
Installed tag: —

Component    Local     Server
---------    -----     ------
Updater      5.1.3     5.1.3
Extras       3.1       3.1
Config       2.1       2.1
Welcome      3.0       3.0
Check        2.1       2.1

Running ultimate-updater check afterwards restores everything.