Added files for automatic ZFS scrubbing on Rocky Linux

zfs-scrub-check.sh

@@ -0,0 +1,57 @@
+#!/bin/bash
+#
+# Checks all ZFS pools for the date of their last scrub.
+# If a pool hasn't been scrubbed in 35+ days, scrub it.
+
+MAX_AGE_DAYS=35
+
+# Get the list of all imported ZFS pools
+POOLS=$(zpool list -H -o name)
+if [ -z "$POOLS" ]; then
+  echo "No ZFS pools found (or none imported). Exiting."
+  exit 0
+fi
+
+echo "Checking ZFS pools: $POOLS"
+
+for POOL in $POOLS; do
+  echo "-------------------------------------"
+  echo "POOL: $POOL"
+
+  # Grab the single line containing 'scan:' from the pool status
+  LINE=$(zpool status "$POOL" | grep "scan:")
+
+  # The line typically looks like:
+  #   scan: scrub repaired 0B in 00:01:23 with 0 errors on Mon Jan 12 23:22:00 2025
+  # We want to extract everything after "on " => the date string.
+  SCRUB_DATE=$(echo "$LINE" | sed -n 's/.* on //p')
+
+  if [ -z "$SCRUB_DATE" ]; then
+    echo "  No last scrub date found (scrub never completed?)"
+    echo "  -> Initiating scrub now..."
+    zpool scrub "$POOL"
+    continue
+  fi
+
+  # Convert last scrub date to epoch seconds
+  SCRUB_EPOCH=$(date -d "$SCRUB_DATE" +%s 2>/dev/null)
+  if [ -z "$SCRUB_EPOCH" ]; then
+    echo "  Could not parse the last scrub date: $SCRUB_DATE"
+    echo "  -> Skipping pool..."
+    continue
+  fi
+
+  NOW_EPOCH=$(date +%s)
+  DIFF_DAYS=$(( (NOW_EPOCH - SCRUB_EPOCH) / 86400 ))
+
+  if [ "$DIFF_DAYS" -ge "$MAX_AGE_DAYS" ]; then
+    echo "  Last scrub was $DIFF_DAYS days ago."
+    echo "  -> Initiating new scrub..."
+    zpool scrub "$POOL"
+  else
+    echo "  Last scrub was $DIFF_DAYS days ago (< $MAX_AGE_DAYS)."
+    echo "  -> Skipping scrub."
+  fi
+done
+
+echo "All pools checked."

zfs-scrub.service

@@ -0,0 +1,6 @@
+[Unit]
+Description=ZFS scrub checker (all pools)
+
+[Service]
+Type=oneshot
+ExecStart=/opt/45drives/tools/zfs-scrub-check.sh

zfs-scrub.timer

@@ -0,0 +1,10 @@
+[Unit]
+Description=Runs ZFS scrub check (all pools) weekly
+
+[Timer]
+# Every Sunday at 3:00 AM
+OnCalendar=Sun *-*-* 03:00:00
+Persistent=true
+
+[Install]
+WantedBy=timers.target