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services.flix: pause sabnzbd below 100 GiB free, not just throttle
The previous guard only throttled sabnzbd below 100 GiB and paused at a
15 GiB floor, which still let the disk fill close to full. Use sabnzbd's
native download_free/complete_free (continuous pause + auto-resume) set
to 100 GiB so it pauses the moment free space drops below that, and have
the guard keep those configured. Transmission has no equivalent low-disk
guard, so the guard still throttles its downloads to a trickle below the
threshold while leaving seeding alone.
Assisted-by: Claude Code (claude-opus-4-8)
author
lassulus
date
(Jun 16, 2026, 4:40 PM CEST)
commit
1c1200ad
1c1200ad9c14e66c20e4290e0250972c3c3f2622
parent
ee66152b
ee66152b7d72c29e87025620e977bd5cd99fd4a2
+22
-20
+22
-20
2configs/services/flix/default.nix
+22
-20
2configs/services/flix/default.nix
···
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'';
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};
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# throttle downloads when /var/download runs low, so a full disk can no
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# longer hard-wedge sabnzbd with an unrecoverable "Disk full! Forcing Pause".
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# below THRESH GiB free: cap sabnzbd + transmission to a trickle.
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# below FLOOR GiB free: pause sabnzbd entirely (auto-resumes when space frees).
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# pause downloads when /var/download runs low, so a full disk can no longer
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# hard-wedge sabnzbd with an unrecoverable "Disk full! Forcing Pause".
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# sabnzbd pauses itself once free disk drops below download_free/complete_free
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# (auto-resuming above); this guard keeps those set to THRESH GiB and, since
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# transmission has no equivalent, throttles its downloads below the threshold.
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systemd.services.download-space-guard = {
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wantedBy = [ "multi-user.target" ];
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after = [ "sabnzbd.service" ];
···
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set -efu
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DIR=/var/download
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THRESH=100
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FLOOR=15
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avail=$(df -Pk "$DIR" | awk 'NR==2 {print int($4 / 1024 / 1024)}')
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key=$(grep -E '^api_key' /var/lib/sabnzbd/sabnzbd.ini | head -1 | cut -d= -f2 | tr -d ' ')
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INI=/var/lib/sabnzbd/sabnzbd.ini
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key=$(grep -E '^api_key' "$INI" | head -1 | cut -d= -f2 | tr -d ' ')
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sab() {
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curl -fsS --max-time 15 "http://127.0.0.1:8080/api?output=json&apikey=$key&$1" >/dev/null
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curl -fsS --max-time 15 "http://127.0.0.1:8080/api?output=json&apikey=$key&$1" >/dev/null || :
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}
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# sabnzbd pauses continuously once free disk drops below these (and
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# auto-resumes above). Keep them at THRESH GiB; re-assert only if changed.
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for k in download_free complete_free; do
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grep -qxF "$k = ''${THRESH}G" "$INI" \
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|| sab "mode=set_config§ion=misc&keyword=$k&value=''${THRESH}G"
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done
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# transmission has no built-in low-disk guard: throttle its downloads to a
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# trickle below the threshold (seeding keeps running), lift it above.
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tr_remote() {
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transmission-remote 128.0.0.1:9091 "$@" >/dev/null || :
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}
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if [ "$avail" -lt "$FLOOR" ]; then
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echo "free ''${avail}G < ''${FLOOR}G floor: pausing sabnzbd, throttling transmission to 500 KB/s"
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sab "mode=pause"
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tr_remote -d 500
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elif [ "$avail" -lt "$THRESH" ]; then
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echo "free ''${avail}G < ''${THRESH}G: throttling sabnzbd to 5 MB/s, transmission to 2 MB/s"
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sab "mode=resume"
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sab "mode=config&name=speedlimit&value=5M"
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tr_remote -d 2000
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if [ "$avail" -lt "$THRESH" ]; then
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echo "free ''${avail}G < ''${THRESH}G: sabnzbd paused by download_free, throttling transmission"
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tr_remote -d 1
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else
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echo "free ''${avail}G >= ''${THRESH}G: removing download speed limits"
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sab "mode=resume"
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sab "mode=config&name=speedlimit&value=0"
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echo "free ''${avail}G >= ''${THRESH}G: downloads unrestricted"
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tr_remote -D
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fi
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'';