fix promtail labels

monitoring/promtail/values.yaml

@@ -3,6 +3,11 @@ config:
     - url: "????" #replaced values.local.yaml. Example: https://lokiserver/loki/api/v1/push
     # by default all scrap configs had node_name  
   snippets:
+    extraRelabelConfigs:
+      - target_label: host
+        replacement: ${HOSTNAME}
+      - target_label: cluster
+        replacement: casa
 
     extraScrapeConfigs: |
       #scrape config for syslog
@@ -24,6 +29,7 @@ config:
             replacement: '${HOSTNAME}'
           - target_label: 'cluster'
             replacement: 'casa' 
+
 extraArgs:
   - --config.expand-env=true
 extraVolumes: