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check_md_raid_python

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+#!/usr/bin/env python3
+
+import re
+import sys
+import os
+
+MDSTAT_PATH = "/proc/mdstat"
+
+def parse_mdstat():
+    if not os.path.exists(MDSTAT_PATH):
+        return [], "CRITICAL - /proc/mdstat not found", 2
+
+    arrays = {}
+    current_array = None
+
+    try:
+        with open(MDSTAT_PATH, "r") as f:
+            for line in f:
+                # RAID device line (e.g., "md127 : active raid1 sda1[0] sdb1[1]")
+                match = re.match(r'^(md\d+)\s*:\s*(.*)', line)
+                if match:
+                    current_array = match.group(1)
+                    arrays[current_array] = {'status': match.group(2), 'lines': [line.strip()]}
+                elif current_array:
+                    arrays[current_array]['lines'].append(line.strip())
+    except Exception as e:
+        return [], f"CRITICAL - Error reading /proc/mdstat: {e}", 2
+
+    return arrays, None, None
+
+def analyze_arrays(arrays):
+    total = len(arrays)
+    degraded = []
+    recovering = []
+    resyncing = []
+
+    for md, data in arrays.items():
+        combined = " ".join(data['lines'])
+        if re.search(r'\[.*_.*\]', combined):
+            degraded.append(md)
+        elif "recovery" in combined:
+            recovering.append(md)
+        elif "resync" in combined:
+            resyncing.append(md)
+
+    return total, degraded, recovering, resyncing
+
+def main():
+    arrays, error_msg, exit_code = parse_mdstat()
+
+    if error_msg:
+        print(error_msg)
+        sys.exit(exit_code)
+
+    total, degraded, recovering, resyncing = analyze_arrays(arrays)
+
+    if recovering:
+        print(f"WARNING - Checked {total} arrays, recovering: {', '.join(recovering)}")
+        sys.exit(1)
+    elif resyncing:
+        print(f"WARNING - Checked {total} arrays, resync: {', '.join(resyncing)}")
+        sys.exit(1)
+    elif not degraded:
+        print(f"OK - Checked {total} arrays. All arrays healthy.")
+        sys.exit(0)
+    else:
+        print(f"CRITICAL - Checked {total} arrays, degraded: {', '.join(degraded)}")
+        sys.exit(2)
+
+if __name__ == "__main__":
+    main()