Use tenacity for resolver retries

core/postfix/start.py

@@ -5,23 +5,16 @@ import os
 import socket
 import glob
 import shutil
-import time
+from tenacity import retry
 
 convert = lambda src, dst: open(dst, "w").write(jinja2.Template(open(src).read()).render(**os.environ))
 
+@retry(stop=stop_after_attempt(10), wait=wait_random(min=2, max=5))
+def resolve():
+	os.environ["FRONT_ADDRESS"] = socket.gethostbyname(os.environ.get("FRONT_ADDRESS", "front"))
+
 # Actual startup script
-i = 0
-t = 10
-while True:
-	i += 1
-	try:
-		os.environ["FRONT_ADDRESS"] = socket.gethostbyname(os.environ.get("FRONT_ADDRESS", "front"))
-	except socket.gaierror as err:
-		if i >= t:
-			raise
-		time.sleep(10)
-		continue
-	break
+resolve()
 os.environ["HOST_ANTISPAM"] = os.environ.get("HOST_ANTISPAM", "antispam:11332")
 os.environ["HOST_LMTP"] = os.environ.get("HOST_LMTP", "imap:2525")