feat!: Enable Traefik metrics, rename common label var, README fixes

templates/docker-compose.yaml.j2

@@ -16,6 +16,9 @@ services:
       - "--certificatesresolvers.en_resolver.acme.storage=/letsencrypt/acme.json"
       - "--certificatesresolvers.myresolver.acme.email={{ acme_email }}"
 {% endif %}
+      - "--metrics.prometheus=true"
+      - "--metrics.prometheus.entryPoint=metrics"
+      - "--entryPoints.metrics.address=:8080"
     volumes:
       - "/var/run/docker.sock:/var/run/docker.sock"
 {% if enable_tls %}

templates/monitoring.yaml.j2

@@ -9,7 +9,7 @@ services:
     command:
 {% if prometheus_remote_write %}
       - "--remoteWrite.url={{ prometheus_remote_write_url }}"
-      - "--remoteWrite.label={{ prometheus_remote_write_label }}"
+      - "--remoteWrite.label={{ prometheus_remote_write_common_label }}"
 {% if prometheus_remote_write_auth %}
       - "--remoteWrite.basicAuth.username={{ prometheus_remote_write_auth_username }}"
       - "--remoteWrite.basicAuth.password={{ prometheus_remote_write_auth_password }}"

templates/vmagent-config.yml.j2

@@ -38,3 +38,11 @@ scrape_configs:
       - source_labels: [instance]
         target_label: instance
         replacement: '{{ node_name | mandatory }}'
+  - job_name: traefik
+    static_configs:
+      - targets:
+          - "traefik:8080"
+    relabel_configs:
+      - source_labels: [instance]
+        target_label: instance
+        replacement: '{{ node_name | mandatory }}'