Fix wrong label in RabbitMQ alerts

Author: priteau

etc/kayobe/kolla/config/prometheus/rabbitmq.rules

@@ -6,68 +6,68 @@ groups:
 - name: rabbitmq.rules
   rules:
   - alert: RabbitMQNodeDown
-    expr: sum(rabbitmq_build_info{host_name!=""}) < 3
+    expr: sum(rabbitmq_build_info{instance!=""}) < 3
     for: 30m
     labels:
       severity: critical
     annotations:
-      description: RabbitMQ node down on {{ $labels.host_name }}
+      description: RabbitMQ node down on {{ $labels.instance }}
   - alert: RabbitMQConsumersLowUtilization
     expr: rabbitmq_queue_consumer_utilisation < 0.4
     for: 5m
     labels:
       severity: warning
     annotations:
-      description: RabbitMQ consumers message consumption speed is low on {{ $labels.host_name }}
+      description: RabbitMQ consumers message consumption speed is low on {{ $labels.instance }}
   - alert: RabbitMQNodeNotDistributed
     expr: erlang_vm_dist_node_state < 3
     for: 5m
     labels:
       severity: critical
     annotations:
-      description: RabbitMQ node not distributed on node {{ $labels.host_name }}
+      description: RabbitMQ node not distributed on node {{ $labels.instance }}
   - alert: RabbitMQMemoryHigh
     expr: rabbitmq_process_resident_memory_bytes / rabbitmq_resident_memory_limit_bytes
       * 100 > 90
     for: 2m
     labels:
       severity: warning
     annotations:
-      description: RabbitMQ memory too high on {{ $labels.host_name }}
+      description: RabbitMQ memory too high on {{ $labels.instance }}
   - alert: RabbitMQFileDescriptorsUsage
     expr: rabbitmq_process_open_fds / rabbitmq_process_max_fds * 100 > 90
     for: 2m
     labels:
       severity: warning
     annotations:
-      description: RabbitMQ file descriptors usage on {{ $labels.host_name }}
+      description: RabbitMQ file descriptors usage on {{ $labels.instance }}
   - alert: RabbitMQTooMuchUnack
     expr: sum(rabbitmq_queue_messages_unacked) BY (queue) > 1000
     for: 1m
     labels:
       severity: warning
     annotations:
-      description: RabbitMQ too much unack on {{ $labels.host_name }}
+      description: RabbitMQ too much unack on {{ $labels.instance }}
   - alert: RabbitMQTooMuchConnections
     expr: rabbitmq_connections > 1000
     for: 2m
     labels:
       severity: warning
     annotations:
-      description: RabbitMQ too much connections on {{ $labels.host_name }}
+      description: RabbitMQ too much connections on {{ $labels.instance }}
   - alert: RabbitMQNoQueueConsumer
     expr: rabbitmq_queue_consumers < 1
     for: 1m
     labels:
       severity: warning
     annotations:
-      description: RabbitMQ no queue consumer on {{ $labels.host_name }}
+      description: RabbitMQ no queue consumer on {{ $labels.instance }}
   - alert: RabbitMQUnroutableMessages
     expr: increase(rabbitmq_channel_messages_unroutable_returned_total[1m]) > 0 or  increase(rabbitmq_channel_messages_unroutable_dropped_total[1m]) > 0
     for: 2m
     labels:
       severity: warning
     annotations:
-      description: RabbitMQ unroutable messages on {{ $labels.host_name }}
+      description: RabbitMQ unroutable messages on {{ $labels.instance }}
 
 {% endraw %}