Add JmxOpenMetricsModule

docs/operation.md

@@ -54,3 +54,15 @@ modules:
 monitor:
   taskDelaySeconds: 10
 ```
+
+## Monitoring
+
+Prometheus can be configured to hit the OpenMetrics endpoint using:
+
+```
+scrape_configs:
+- job_name: trino_gateway
+  static_configs:
+    - targets:
+        - localhost:8080
+```

gateway-ha/pom.xml

@@ -173,6 +173,11 @@
             <artifactId>node</artifactId>
         </dependency>
 
+        <dependency>
+            <groupId>io.airlift</groupId>
+            <artifactId>openmetrics</artifactId>
+        </dependency>
+
         <dependency>
             <groupId>io.airlift</groupId>
             <artifactId>stats</artifactId>

gateway-ha/src/main/java/io/trino/gateway/ha/HaGatewayLauncher.java

@@ -28,6 +28,7 @@
 import io.airlift.log.LogJmxModule;
 import io.airlift.log.Logger;
 import io.airlift.node.NodeModule;
+import io.airlift.openmetrics.JmxOpenMetricsModule;
 import io.airlift.units.Duration;
 import io.trino.gateway.baseapp.BaseApp;
 import io.trino.gateway.ha.config.HaGatewayConfiguration;
@@ -54,6 +55,7 @@ private void start(List<Module> additionalModules, HaGatewayConfiguration config
                 new HttpServerModule(),
                 new JmxModule(),
                 new JmxHttpModule(),
+                new JmxOpenMetricsModule(),
                 new LogJmxModule(),
                 new MBeanModule(),
                 new JsonModule(),