initial

.gitignore

+.idea/
+venv/
\ No newline at end of file

exporter.py

+#! /usr/bin/env python
+import os
+
+import requests
+from prometheus_client import start_http_server, Gauge
+from time import sleep
+
+metric_members = Gauge('matrix_channel_members_total', 'Members joined in room', ['room_id', 'canonical_alias', 'name'])
+metric_channel_types = Gauge('matrix_channel_types_total', 'Channels per type', ['type'])
+metric_channel_version = Gauge('matrix_channel_version_total', 'Channels per version', ['version'])
+
+
+def fetch_metrics():
+	room_type_count = {
+		'space': 0,
+		'public': 0,
+		'private': 0,
+		'dm': 0
+	}
+
+	auth = {
+		'Authorization': f'Bearer {config['token']}'
+	}
+	room_version_count = {}
+	rooms = requests.get(f"https://{config['synapse_url']}/_synapse/admin/v1/rooms", headers=auth).json()['rooms']
+
+	for room in sorted(rooms, key=lambda item: item['joined_members'], reverse=True):
+		if room['version'] not in room_version_count:
+			room_version_count[room['version']] = 0
+
+		room_version_count[room['version']] += 1
+
+		if room['room_type'] == 'm.space':
+			room_type_count['space'] += 1
+		elif room['join_rules'] == 'public':
+			room_type_count['public'] += 1
+		elif room['name'] and room['join_rules'] == 'invite':
+			room_type_count['private'] += 1
+		else:
+			room_type_count['dm'] += 1
+
+		metric_members.labels(
+			room_id=room['room_id'],
+			canonical_alias=room['canonical_alias'] if room['canonical_alias'] else '',
+			name=room['name'] if room['name'] else ''
+		).set(room['joined_members'])
+
+	for room_version, count in room_version_count.items():
+		metric_channel_version.labels(version=room_version).set(count)
+
+	for room_type, count in room_type_count.items():
+		metric_channel_types.labels(type=room_type).set(count)
+
+
+if __name__ == '__main__':
+	config = {
+		'port': int(os.environ.get('PORT')),
+		'token': os.environ.get('ACCESS_TOKEN'),
+		'synapse_url': os.environ.get('SYNAPSE_URL')
+	}
+
+	start_http_server(config['port'])
+
+	while True:
+		try:
+			fetch_metrics()
+		except Exception as e:
+			print('Exception:\n' + str(e))
+		sleep(20)

requirements.txt

+requests
+prometheus-client
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