using environment variables

promtail/promtail-config.yml

@@ -6,7 +6,7 @@ positions:
   filename: /tmp/positions.yaml
 
 clients:
-  - url: http://loki:3100/loki/api/v1/push
+  - url: http://${LOKI_HOST}:3100/loki/api/v1/push
 
 scrape_configs:
   - job_name: flog_scrape
@@ -19,5 +19,5 @@ scrape_configs:
         target_label: 'container'
       - source_labels: ['__meta_docker_container_log_stream']
         target_label: 'logstream'
-      # - target_label: 'host'
-      #   replacement: 'docker-lxc'
+      - target_label: 'host'
+        replacement: '${HOSTNAME}'