feat: allow using statsd server to export metric

Author: Kl0ven

config.py

@@ -1,5 +1,6 @@
 # -- coding: UTF-8 --
 import os
+import socket
 
 worker_class = "gevent"
 workers = int(os.getenv("WORKERS", "4"))
@@ -9,3 +10,10 @@
 loglevel = os.environ.get("LOG_LEVEL", "info")
 errorlog = os.environ.get("ERROR_LOG", "-")
 accesslog = os.environ.get("ACCESS_LOG", "-")
+
+
+_statsd_host = os.getenv("STATSD_HOST")
+_statsd_port = os.getenv("STATSD_PORT")
+if _statsd_host and _statsd_port:
+    statsd_host = f"{_statsd_host}:{_statsd_port}"
+    statsd_prefix = socket.gethostname()

docker/docker-compose.example.yaml

@@ -7,30 +7,38 @@ services:
       - POSTGRES_DB=sentry
       - POSTGRES_USER=sentry
       - POSTGRES_PASSWORD=sentry
+    profiles:
+      - data
     ports:
       - 5432:5432
     volumes:
       - "controllerdata:/var/lib/postgresql/data"
 
   redis:
     image: 'bitnami/redis:latest'
+    profiles:
+      - data
     environment:
       - ALLOW_EMPTY_PASSWORD=yes
     ports:
       - 6379:6379
 
   static:
-    image: spklabs/sentry-dynamic-sampling-controller-static:latest
+    image: spklabs/sentry-dynamic-sampling-controller-static:alpha
     ports:
       - 8081:80
+    profiles:
+      - app
   app:
-    image: spklabs/sentry-dynamic-sampling-controller:latest
+    image: spklabs/sentry-dynamic-sampling-controller:alpha
     depends_on:
       - postgres
       - redis
       - static
     ports:
       - 8080:8000
+    profiles:
+      - app
     environment:
       - ENV=debug
       - SECRET_KEY="very_secret"
@@ -57,5 +65,17 @@ services:
       - OIDC_RP_SIGN_ALGO=RS256
       - STATIC_URL=http://localhost:8081/static
 
+  statsd-exporter:
+    image: prom/statsd-exporter:v0.23.0
+    ports:
+      - "9125:9125/udp"
+      - "9102:9102"
+    profiles:
+      - metrics
+    volumes:
+      - ./etc/statsd.conf:/statsd/statsd.conf
+    command:
+      - --statsd.mapping-config=/statsd/statsd.conf
+
 volumes:
   controllerdata:

docker/etc/statsd.conf

@@ -0,0 +1,19 @@
+mappings:
+  - match: "*.gunicorn.request.status.*"
+    help: "gunicorn response code"
+    name: "gunicorn_response_code"
+    labels:
+      app: "$1"
+      status: "$2"
+  - match: "*.gunicorn.workers"
+    name: "gunicorn_workers"
+    labels:
+      app: "$1"
+  - match: "*.gunicorn.requests"
+    name: "gunicorn_requests"
+    labels:
+      app: "$1"
+  - match: "*.gunicorn.request.duration"
+    name: "gunicorn_request_duration"
+    labels:
+      app: "$1"