Add datadog metrics (Netflix#2332)

* add postgres missing dependency

* support datadog

* update datadog conditional property

CHANGELOG.md

@@ -341,3 +341,6 @@ Component configuration:
 |  |  |  |
 | - | conductor.metrics-logger.enabled | false |
 | - | conductor.metrics-prometheus.enabled | false |
+| - | conductor.metrics-datadog.enable | false |
+| - | conductor.metrics-datadog.api-key | |
+

contribs/src/main/java/com/netflix/conductor/contribs/metrics/DatadogMetricsConfiguration.java

@@ -0,0 +1,24 @@
+package com.netflix.conductor.contribs.metrics;
+
+import com.netflix.spectator.api.Spectator;
+import com.netflix.spectator.micrometer.MicrometerRegistry;
+import io.micrometer.core.instrument.MeterRegistry;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * Metrics Datadog module, sending all metrics to a Datadog server.
+ * <p>
+ * Enable in config: conductor.metrics-datadog.enabled=true
+ * <p>
+ * Make sure your dependencies include both micrometer-registry-datadog & spring-boot-starter-actuator
+ */
+@ConditionalOnProperty(value = "conductor.metrics-datadog.enabled", havingValue = "true")
+@Configuration
+public class DatadogMetricsConfiguration {
+
+    public DatadogMetricsConfiguration(MeterRegistry meterRegistry) {
+        final MicrometerRegistry metricsRegistry = new MicrometerRegistry(meterRegistry);
+        Spectator.globalRegistry().add(metricsRegistry);
+    }
+}

server/build.gradle

@@ -39,6 +39,8 @@ dependencies {
 
     implementation "org.springdoc:springdoc-openapi-ui:${revOpenapi}"
 
+    runtimeOnly 'io.micrometer:micrometer-registry-datadog'
+
     runtimeOnly 'com.netflix.spectator:spectator-reg-micrometer'
 
     testImplementation project(':conductor-rest')

server/src/main/resources/application.properties

@@ -102,3 +102,7 @@ conductor.workflow-execution-lock.type=noop_lock
 # Additional modules for metrics collection exposed to Prometheus (optional)
 # conductor.metrics-prometheus.enabled=true
 # management.endpoints.web.exposure.include=prometheus
+
+# Additional modules for metrics collection exposed to Datadog (optional)
+management.metrics.export.datadog.enabled=${conductor.metrics-datadog.enabled:false}
+management.metrics.export.datadog.api-key=${conductor.metrics-datadog.api-key:}