feat: anubis metrics (#127)

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* [x] I have deployed and tested my changes
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* [ ] I have made my environment variable changes [backwards compatible](https://docs.coopcloud.tech/maintainers/upgrade/#backwards-compatible-environment-variable-changes)
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Reviewed-on: coop-cloud/traefik#127
Reviewed-by: p4u1 <133+p4u1@noreply.git.coopcloud.tech>
Co-authored-by: f <f@sutty.nl>
Co-committed-by: f <f@sutty.nl>

.env.sample

@@ -223,5 +223,8 @@ WRITE_TIMEOUT=0s
 #ANUBIS_SERVE_ROBOTS_TXT=true
 #ANUBIS_SLOG_LEVEL=INFO
 
+## Anubis metrics
+#COMPOSE_FILE="$COMPOSE_FILE:compose.anubis-metrics.yml"
+
 ## Enable onion service support
 #ONION_ENABLED=1

README.md

@@ -72,6 +72,9 @@ After deploying these changes, go to each recipe that supports Anubis
 and follow the process there.  **Enabling Anubis here is not enough for
 protection your apps.**
 
+If you want to collect Prometheus metrics for Anubis, for instance with
+[monitoring-ng](/monitoring-ng), uncomment the "Anubis metrics" section.
+
 ## Enabling onion service
 
 Uncomment the line in the config setting `ONION_ENABLED=1`. This will create a new entrypoint on port 9052 which can be used to bypass forced SSL. For more details, see the [onion recipe](https://recipes.coopcloud.tech/onion).

abra.sh

@@ -1,3 +1,4 @@
 export TRAEFIK_YML_VERSION=v32
 export FILE_PROVIDER_YML_VERSION=v12
 export ENTRYPOINT_VERSION=v5
+export ANUBIS_YML_VERSION=v1

anubis.yml.tmpl

@@ -0,0 +1,7 @@
+bots:
+- import: (data)/meta/default-config.yaml
+{{ if eq (env "ANUBIS_METRICS_ENABLED") "true" }}
+metrics:
+  bind: ":9090"
+  network: "tcp"
+{{ end }}

compose.anubis-metrics.yml

@@ -0,0 +1,11 @@
+---
+version: "3.8"
+services:
+  anubis:
+    environment:
+      ANUBIS_METRICS_ENABLED: "true"
+    deploy:
+      labels:
+      - "prometheus.io/scrape=true"
+      - "prometheus.io/port=9090"
+      - "prometheus.io/path=/metrics"

compose.anubis.yml

@@ -19,6 +19,10 @@ services:
       OG_CACHE_CONSIDER_HOST: "${ANUBIS_OG_CACHE_CONSIDER_HOST}"
       SERVE_ROBOTS_TXT: "${ANUBIS_SERVE_ROBOTS_TXT}"
       SLOG_LEVEL: "${ANUBIS_SLOG_LEVEL:-INFO}"
+      POLICY_FNAME: "/data/cfg/botPolicy.yaml"
+    configs:
+    - source: anubis_yml
+      target: /data/cfg/botPolicy.yaml
     networks:
     - proxy
     deploy:
@@ -29,3 +33,8 @@ services:
       - "traefik.http.routers.anubis.entrypoints=web-secure"
       - "traefik.http.services.anubis.loadbalancer.server.port=8080"
       - "traefik.http.routers.anubis.service=anubis"
+configs:
+  anubis_yml:
+    name: ${STACK_NAME}_anubis_yml_${ANUBIS_YML_VERSION}
+    file: anubis.yml.tmpl
+    template_driver: golang