chat-archiver: pass in node name

instead of using container hostname

chat_archiver/chat_archiver/main.py

@@ -399,12 +399,14 @@ def merge_messages(left, right):
 	return result
 
 
-def main(channel, nick, oauth_token_path, base_dir='/mnt'):
+def main(channel, nick, oauth_token_path, base_dir='/mnt', name=None):
 	with open(oauth_token_path) as f:
 		oauth_token = f.read()
 	# To ensure uniqueness even if multiple instances are running on the same host,
 	# also include our pid
-	name = "{}.{}".format(socket.gethostname(), os.getpid())
+	if name is None:
+		name = socket.gethostname()
+	name = "{}.{}".format(name, os.getpid())
 
 	stopping = gevent.event.Event()
 	gevent.signal_handler(signal.SIGTERM, stopping.set)

docker-compose.jsonnet

@@ -454,7 +454,7 @@
     [if $.enabled.chat_archiver then "chat_archiver"]: {
       image: $.get_image("chat_archiver"),
       restart: "always",
-      command: [$.chat_archiver.channel, $.chat_archiver.user, "/token"],
+      command: [$.chat_archiver.channel, $.chat_archiver.user, "/token", "--name", $.localhost],
       volumes: ["%s:/mnt" % $.segments_path, "%s:/token" % $.chat_archiver.token_path],
     },