Add healthcheck for kraft controller/update jmx rules

Author: hvan

api/assets/kafka/jmx-exporter.yml

@@ -1,6 +1,11 @@
 lowercaseOutputName: true
 rules:
   # Special cases and very specific rules
+    # Export kraft current state metrics
+  - pattern: 'kafka.server<type=raft-metrics><>current-state: (.+)'
+    name: kafka_server_raft_metrics_current_state_$1
+    type: GAUGE
+    value: 1
   - pattern: 'kafka.server<type=(app-info), id=(\d+)><>(Version): ([-.~+\w\d]+)'
     name: kafka_server_$1_$3
     type: COUNTER
@@ -240,8 +245,3 @@ rules:
   # Export all other java.{lang,nio}* beans using default format
   - pattern: java.lang.+
   - pattern: java.nio.+
-  # Export kraft current state metrics
-  - pattern: 'kafka.server<type=raft-metrics><>current-state: (.+)'
-    name: "kafka_server_raft_metrics_current_state_$1"
-    type: GAUGE
-    value: 1

api/assets/kafka/kraft-controller-healthcheck.sh

@@ -26,4 +26,4 @@ if [ -n "$MATCHING_METRIC" ]; then
 else
     echo "Failure: No active Kraft controller state found with a value of 1.0."
     exit 1
-fi
+fi