Docker: Add Prometheus as an optional service

caddy/Caddyfile

@@ -13,5 +13,7 @@ import endpoint
 
     reverse_proxy /media/* media:8000
 
+    reverse_proxy /prometheus/* prometheus:9090
+
     reverse_proxy client:4200
 }

docker/.env

@@ -94,3 +94,10 @@ REDIS_SLAVE_WAIT_TIMEOUT=
 DJANGO_LOG_LEVEL=
 OPENSLIDES_LOG_LEVEL=
 RESET_PASSWORD_VERBOSE_ERRORS=
+
+# Optional services
+# -----------------
+# If enabled, Prometheus will be accessible at /prometheus/ without any
+# built-in access controls!  Please make sure to use it in a controlled
+# development environment or to set up access controls independently.
+PROMETHEUS_ENABLED=

docker/build.sh

@@ -8,6 +8,7 @@ TARGETS=(
   [server]="$(dirname "${BASH_SOURCE[0]}")/../server/docker/"
   [proxy]="$(dirname "${BASH_SOURCE[0]}")/../caddy/"
   [autoupdate]="$(dirname "${BASH_SOURCE[0]}")/../autoupdate/"
+  [prometheus]="$(dirname "${BASH_SOURCE[0]}")/../prometheus/"
   [media]="https://github.com/OpenSlides/openslides-media-service.git"
   [pgbouncer]="https://github.com/OpenSlides/openslides-docker-compose.git#:pgbouncer"
   [postfix]="https://github.com/OpenSlides/openslides-docker-compose.git#:postfix"

docker/docker-compose.yml.m4

@@ -240,6 +240,11 @@ ifelse(read_env(`PGNODE_3_ENABLED'), 1, `'
     # Override command to run more workers per task
     # command: ["gunicorn", "-w", "4", "--preload", "-b",
     #   "0.0.0.0:8000", "src.mediaserver:app"]
+ifelse(read_env(`PROMETHEUS_ENABLED'), 1, `'
+  prometheus:
+    image: ifenvelse(`DEFAULT_DOCKER_REGISTRY', openslides)/openslides-prometheus:latest
+    networks:
+      - back)
 
 volumes:
   dbdata1:

docker/docker-stack.yml.m4

@@ -270,6 +270,11 @@ ifelse(read_env(`PGNODE_3_ENABLED'), 1, `'
     # Override command to run more workers per task
     # command: ["gunicorn", "-w", "4", "--preload", "-b",
     #   "0.0.0.0:8000", "src.mediaserver:app"]
+ifelse(read_env(`PROMETHEUS_ENABLED'), 1, `'
+  prometheus:
+    image: ifenvelse(`DEFAULT_DOCKER_REGISTRY', openslides)/openslides-prometheus:latest
+    networks:
+      - back)
 
 volumes:
   dbdata1:

prometheus/Dockerfile

@@ -0,0 +1,9 @@
+FROM prom/prometheus:v2.24.0
+
+ADD prometheus.yml /etc/prometheus/
+
+CMD [ "--config.file=/etc/prometheus/prometheus.yml", \
+             "--storage.tsdb.path=/prometheus", \
+             "--web.console.libraries=/usr/share/prometheus/console_libraries", \
+             "--web.console.templates=/usr/share/prometheus/consoles", \
+             "--web.external-url=http://localhost:9090/prometheus" ]

prometheus/prometheus.yml

@@ -0,0 +1,8 @@
+global:
+  evaluation_interval: 15s
+
+scrape_configs:
+- job_name: openslides3-autoupdate
+  static_configs:
+  - targets:
+    - autoupdate:8002