wan
84d6f9724c
- runner: export sbin-inclusive PATH (util-linux tools live in /usr/sbin) - 001: read /proc/swaps instead of swapon(8) - 005: resolve /dev/disk/by-uuid symlink instead of findfs(8); report ? (exit 2) when the UUID cannot be resolved
51 lines
2.2 KiB
Bash
51 lines
2.2 KiB
Bash
#!/usr/bin/env bash
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# 005-mount-pgdata - Mount the dedicated 20G data disk (/dev/sdb, ext4)
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# at /var/lib/postgresql so the PostgreSQL cluster lives on its own disk.
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# Mounted by UUID (stable across device reordering), noatime for DB workload.
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# up: fstab entry + mount (idempotent; refuses if mountpoint holds data)
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# down: unmount + remove fstab entry (data on the disk is preserved)
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set -euo pipefail
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DISK_UUID=d44ad362-947a-46de-acbf-5530f83e4506
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MOUNTPOINT=/var/lib/postgresql
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FSTAB_LINE="UUID=$DISK_UUID $MOUNTPOINT ext4 defaults,noatime 0 2"
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case "${1:-}" in
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up)
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if findmnt -rn "$MOUNTPOINT" >/dev/null; then
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echo " $MOUNTPOINT already mounted - skipping"
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exit 0
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fi
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dev=$(findfs UUID="$DISK_UUID") || {
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echo "disk with UUID=$DISK_UUID not found - is /dev/sdb attached?" >&2
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exit 1
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}
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# Never mount over existing data - it would be silently hidden
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if [[ -d $MOUNTPOINT ]] && find "$MOUNTPOINT" -mindepth 1 -print -quit | grep -q .; then
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echo "refusing to mount: $MOUNTPOINT exists and is not empty" >&2
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exit 1
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fi
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mkdir -p "$MOUNTPOINT"
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grep -q "^UUID=$DISK_UUID" /etc/fstab || echo "$FSTAB_LINE" >> /etc/fstab
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mount "$MOUNTPOINT" # via fstab entry - also validates it
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echo " $dev mounted at $MOUNTPOINT (noatime, fstab entry added)"
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;;
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status)
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src=$(findmnt -rn -o SOURCE "$MOUNTPOINT" 2>/dev/null || true)
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want=$(readlink -f "/dev/disk/by-uuid/$DISK_UUID" 2>/dev/null || true)
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[[ -n $want ]] || { echo "? cannot resolve UUID=$DISK_UUID"; exit 2; }
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[[ -n $src ]] || { echo "DRIFT $MOUNTPOINT not mounted"; exit 1; }
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[[ $src == "$want" ]] || { echo "DRIFT $MOUNTPOINT mounted from $src (want $want)"; exit 1; }
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grep -q "^UUID=$DISK_UUID $MOUNTPOINT " /etc/fstab \
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|| { echo "DRIFT fstab entry missing"; exit 1; }
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echo "OK $src at $MOUNTPOINT + fstab entry"
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;;
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down)
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# sysmig rolls back in reverse order, so 006 (postgres) is already down
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if findmnt -rn "$MOUNTPOINT" >/dev/null; then umount "$MOUNTPOINT"; fi
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sed -i "\|^UUID=$DISK_UUID|d" /etc/fstab
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rmdir "$MOUNTPOINT" 2>/dev/null || true # keep dir if data remains
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echo " $MOUNTPOINT unmounted + fstab entry removed (disk data kept)"
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;;
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esac
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