add gluster mounting control

sharedLogging.py

@@ -1,4 +1,5 @@
-import logging
+import logging, os
+from subprocess import run, PIPE, CalledProcessError
 from logging.handlers import TimedRotatingFileHandler, QueueListener, QueueHandler
 
 def SlaveLogger(name, level, queue):
@@ -8,19 +9,44 @@ def SlaveLogger(name, level, queue):
 	logger.propagate = False
 	return logger
 
-#TODO: need to add mounting code here for gluster. since this app is the only
-# gluster user, (un)mounting should be handled here instead of by systemd
-
+class GlusterFS():
+	def __init__(self, server, volume, mountpoint):
+		self.server = server
+		self.volume = volume
+		
+		if not os.path.exists(mountpoint):
+			raise FileNotFoundError
+			
+		self.mountpoint = mountpoint
+	
+	def mount(self):
+		self._run(['mount', '-t', 'glusterfs', self.server + ':/' + self.volume, self.mountpoint])
+	
+	def unmount(self):
+		self._run(['umount', self.mountpoint])
+			
+	def _run(self, cmd):
+		try:
+			run(cmd, check=True, stdout=PIPE, stderr=PIPE)
+		except CalledProcessError as e:
+			print(e.stderr.decode('ascii').rstrip())
+		
 class MasterLogger():
 	def __init__(self, name, level, queue):
+		mountpoint = '/mnt/glusterfs/pyledriver'
+		
+		self.fs = GlusterFS('192.168.11.39', 'pyledriver', mountpoint)
+		self.fs.mount()
+		
 		consoleFormat = logging.Formatter('[%(name)s] [%(levelname)s] %(message)s')
 		fileFormat = logging.Formatter('[%(asctime)s] [%(name)s] [%(levelname)s] %(message)s')
 		
 		console = logging.StreamHandler()
 		console.setFormatter(consoleFormat)
 		
-		rotatingFile = TimedRotatingFileHandler('/mnt/glusterfs/pyledriver/logs/pyledriver-log', when='midnight')
-		rotatingFile.setFormatter(fileFormat)
+		# TODO: check that 'logs' actually exists in the mp
+		self.rotatingFile = TimedRotatingFileHandler(mountpoint + '/logs/pyledriver-log', when='midnight')
+		self.rotatingFile.setFormatter(fileFormat)
 		
 		logging.basicConfig(level=getattr(logging, level), handlers=[QueueHandler(queue)])
 		logger = logging.getLogger(name)
@@ -30,8 +56,10 @@ class MasterLogger():
 		for i in ['debug', 'info', 'warning', 'error', 'critical']:
 			setattr(self, i, getattr(logger, i))
 		
-		self.queListener = QueueListener(queue, console, rotatingFile)
+		self.queListener = QueueListener(queue, console, self.rotatingFile)
 		self.queListener.start()
 
 	def stop(self):
 		self.queListener.stop()
+		self.rotatingFile.close() # must close file stream before unmounting
+		self.fs.unmount()