feat: add hostname label to promtail logs

abra.sh

@@ -5,7 +5,7 @@ export GRAFANA_SWARM_DASHBOARD_JSON_VERSION=v1
 export GRAFANA_STACKS_DASHBOARD_JSON_VERSION=v1
 export GRAFANA_TRAEFIK_DASHBOARD_JSON_VERSION=v1
 export GRAFANA_CUSTOM_INI_VERSION=v2
-export PROMTAIL_YML_VERSION=v1
+export PROMTAIL_YML_VERSION=v2
 export LOKI_YML_VERSION=v2
 export PROMETHEUS_YML_VERSION=v1
 

compose.promtail.yml

@@ -15,6 +15,7 @@ services:
     secrets:
       - basic_auth_admin_password
     environment:
+      - DOMAIN
       - LOKI_PUSH_URL
 
 configs:

promtail.yml.tmpl

@@ -10,6 +10,8 @@ clients:
     basic_auth:
       username: admin
       password: {{ secret "basic_auth_admin_password" }}
+    external_labels:
+      hostname: {{ env "DOMAIN" }}
 
 scrape_configs:
 - job_name: system