add my new check_iowait

check_iowait_proc.sh

@@ -0,0 +1,64 @@
+#!/bin/bash
+
+WARNING_THRESHOLD=10
+CRITICAL_THRESHOLD=20
+
+# Parse command line arguments
+while getopts "w:c:" opt; do
+  case $opt in
+    w)
+      WARNING_THRESHOLD="$OPTARG"
+      ;;
+    c)
+      CRITICAL_THRESHOLD="$OPTARG"
+      ;;
+    \?)
+      echo "Usage: check_iowait.sh [-w warning_threshold] [-c critical_threshold]"
+      exit 1
+      ;;
+  esac
+done
+
+if ! command -v iostat &>/dev/null; then
+  echo "iostat not found! Please install sysstat:"
+  echo "sudo apt install sysstat"
+  exit 1
+fi
+
+if ! command -v iotop &>/dev/null; then
+  echo "iotop not found! Please install sysstat:"
+  echo "sudo apt install iotop"
+  exit 1
+fi
+
+# Get iowait value
+iowait=$(iostat -c | awk 'NR==4 {print $4}')
+
+# Get process list header and top 3 processes causing iowait
+header=$(iotop -b -n 1 -P -k -o | head -n 1)
+top_processes=$(iotop -b -n 1 -P -k -o | tail -n +4 | head -n 3)
+
+# Check if there are no processes causing iowait
+if [ -z "$top_processes" ]; then
+    top_processes="No processes causing significant iowait."
+else
+    top_processes="$header"$'\n'"$top_processes"
+fi
+
+iowait_str="- iowait: $iowait%"$'\n'"Top 3 processes causing iowait:"
+perfdata="iowait=$iowait%;$WARNING_THRESHOLD;$CRITICAL_THRESHOLD;0;100"
+
+# Check if iowait is above thresholds
+if (( $(echo "$iowait > $CRITICAL_THRESHOLD" | bc -l) )); then
+    echo "CRITICAL $iowait_str"
+    echo "$top_processes | $perfdata"
+    exit 2
+elif (( $(echo "$iowait > $WARNING_THRESHOLD" | bc -l) )); then
+    echo "WARNING $iowait_str"
+    echo "$top_processes | $perfdata"
+    exit 1
+else
+    echo -e "OK $iowait_str"
+    echo "$top_processes | $perfdata"
+    exit 0
+fi