scrubPool.sh: scrub only one pool

[thedix]

Sometimes it is useful to scrub pools separately since multiple scrubs can lead to a huge resource consumption.
It would be a good idea to schedule scrubbing different pools at different times.

I added a new script scrubPool.sh for scrubbing only one pool which is specified as a command line argument:
scrubPool.sh my_pool_name
I just took the original scrubPools.sh and added POOL_NAME for each zpool invocation and made some cleanups.
See the difference:

--- scrubPools.sh	Sun May 04 21:46:17 2025
+++ scrubPool.sh	Sun Oct 12 10:18:16 2025
@@ -25,6 +25,9 @@
 readonly LOGFILE="$CFG_LOG_FOLDER/$SCRIPT_NAME.log"
 readonly TMPFILE_ARGS="$CFG_TMP_FOLDER/$SCRIPT_NAME.$$.args.tmp"
 
+# Pool name
+POOL_NAME=""
+
 # Set variables corresponding to the input parameters
 ARGUMENTS="$@"
 
@@ -53,11 +56,13 @@
 
     # Check if the number of mandatory parameters
     # provided is as expected
-    if [ "$#" -ne "0" ]; then
-        echo "No mandatory arguments should be provided"
+    if [ "$#" -ne "1" ]; then
+        echo "Exactly one mandatory argument should be provided"
         return 1
     fi
 
+    POOL_NAME="$1"
+
     return 0
 }
 
@@ -67,7 +72,7 @@
 #       1 otherwise
 ##################################
 scrubInProgress() {
-    if $BIN_ZPOOL status | grep "scrub in progress">/dev/null; then
+    if $BIN_ZPOOL status $POOL_NAME | grep "scrub in progress">/dev/null; then
         return 0
     else
         return 1
@@ -82,22 +87,19 @@
 main() {
 
     # Starting scrubbing
-    log_info "$LOGFILE" "Starting scrubbing"
-    $BIN_ZPOOL list -H -o name | while read pool; do
-        $BIN_ZPOOL scrub $pool
-        log_info "$LOGFILE" "Starting scrubbing of pool: $pool"
-    done
+    log_info "$LOGFILE" "Starting scrubbing of pool: $POOL_NAME"
+    $BIN_ZPOOL scrub $POOL_NAME
 
     # Waiting for the end of the scrubbing
     while scrubInProgress; do sleep 10; done;
-    log_info "$LOGFILE" "Scrub finished for all pools"
+    log_info "$LOGFILE" "Scrub finished for pool: $POOL_NAME"
 
-    # Check if the pools are healthy
-    if ZPOOL_STATUS_NON_NATIVE_ASHIFT_IGNORE=1 $BIN_ZPOOL status -x | grep "all pools are healthy">/dev/null; then
-        ZPOOL_STATUS_NON_NATIVE_ASHIFT_IGNORE=1 $BIN_ZPOOL status -x | log_info "$LOGFILE"
+    # Check if the pool is healthy
+    if ZPOOL_STATUS_NON_NATIVE_ASHIFT_IGNORE=1 $BIN_ZPOOL status -x $POOL_NAME | grep "is healthy">/dev/null; then
+        ZPOOL_STATUS_NON_NATIVE_ASHIFT_IGNORE=1 $BIN_ZPOOL status -x $POOL_NAME | log_info "$LOGFILE"
         return 0
     else
-        $BIN_ZPOOL status -v | log_error "$LOGFILE"
+        $BIN_ZPOOL status -v $POOL_NAME | log_error "$LOGFILE"
         return 1
     fi
 }