added service and deploy script

upsmon.py

@@ -1,15 +1,17 @@
-import sys
-import json
-import subprocess
 import logging
+from subprocess import check_output, TimeoutExpired, CalledProcessError
+from json import dumps
+from sys import exit as sysexit, stdout
 from time import sleep
-from os import environ
+from os import path
 
 import paho.mqtt.client as mqtt
 import paho.mqtt.enums as mqtt_enums
 
 # Logger options
-LOGFILE = environ.get('LOGFILE','/mnt/logs/UPSmon.log')
+LOGFILE = '/mnt/logs/UPSmon.log'
+if not path.exists("/mnt/logs"):
+    LOGFILE = '/tmp/UPSmon.log'
 
 #CONSOLE_DEBUG = logging.DEBUG
 CONSOLE_DEBUG = logging.INFO
@@ -49,18 +51,18 @@ def main() -> int:
 
     while client.is_connected():
         try:
-            rv: bytes = subprocess.check_output(CMD, timeout=2.0)
+            rv: bytes = check_output(CMD, timeout=2.0)
             data_raw: list[list[str]] = [
                 l.split(':', 1) for l in rv.decode(encoding='ascii').splitlines()
             ]
             data = {
                 k.strip().lower():clean_data(v.strip()) for k,v in data_raw if k.strip() in EXPORT_KEYS
             }
-            LOGGER.debug(f"[{i}] {json.dumps(data, indent=2)}")
+            LOGGER.debug(f"[{i}] {dumps(data, indent=2)}")
             
             tag: str = str(data.pop('upsname'))
             client.publish(topic='monitoring/ups/status',
-                            payload=json.dumps(
+                            payload=dumps(
                                 obj=(data, {"upsname":tag})
                            ))
             
@@ -74,10 +76,10 @@ def main() -> int:
         except FileNotFoundError as f:
             LOGGER.error(f"{CMD} executable not found: {f}")
             return f.errno if f.errno else -1
-        except subprocess.CalledProcessError as e:
+        except CalledProcessError as e:
             LOGGER.error(f"{CMD} failed with: {e}")
             return e.returncode
-        except subprocess.TimeoutExpired as t:
+        except TimeoutExpired as t:
             LOGGER.warning(f"{CMD} timed out: {t}")
             return int(t.timeout)
         except Exception as ee: # default case catch all
@@ -102,7 +104,7 @@ if __name__ == "__main__":
     LOGGER.addHandler(fh)
 
     # Console logging
-    cl = logging.StreamHandler(sys.stdout)
+    cl = logging.StreamHandler(stdout)
     cl.setLevel(CONSOLE_DEBUG)
     cl.setFormatter(formatter)
     LOGGER.addHandler(cl)
@@ -112,4 +114,4 @@ if __name__ == "__main__":
     while main() != 0:
         LOGGER.warning("Restarting...")
         sleep(30.0)
-    sys.exit(0)
+    sysexit(0)