add check_osdb.py

check_osdb.py

@@ -0,0 +1,49 @@
+#!/usr/bin/python3
+#coding=utf-8
+import subprocess
+import argparse
+import sys
+
+recognized = [ "debian", "arch" ]
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--verbose", "-v", action="store_true")
+    parser.add_argument("--expect")
+    args = parser.parse_args()
+
+    quiet = not args.verbose
+
+    try:
+        with open("/etc/os-release") as f:
+            lines = f.read().splitlines()
+    except Exception as e:
+        print(f"UNKNOWN - {e}")
+        sys.exit(3)
+
+    detected_os = None
+    like_os = None
+
+    for line in lines:
+        if line.startswith("ID_LIKE="):
+            for os in recognized:
+                if os in line:
+                    like_os = os
+        if line.startswith("ID="):
+            for os in recognized:
+                if os in line:
+                    detected_os = os
+
+    if not detected_os:
+        if like_os:
+            detected_os = like_os
+        else:
+            detected_os = "unknown"
+
+    if detected_os == args.expect:
+        print("OK - OS matches")
+        sys.exit(0)
+
+    if args.expect != detected_os:
+        print(f"CRITICAL - MISSMATCH DETECTED {detected_os} != {args.expect}")
+        sys.exit(2)