Configurable metrics server port.

server/src/main/java/com/alibaba/otter/canal/server/embedded/CanalServerWithEmbedded.java

@@ -44,6 +44,7 @@ public class CanalServerWithEmbedded extends AbstractCanalLifeCycle implements C
     private Map<String, CanalInstance> canalInstances;
     // private Map<ClientIdentity, Position> lastRollbackPostions;
     private CanalInstanceGenerator     canalInstanceGenerator;
+    private int                        metricsPort;
     private CanalMetricsService        metrics          = NopCanalMetricsService.NOP;
 
     private static class SingletonHolder {
@@ -64,6 +65,7 @@ public class CanalServerWithEmbedded extends AbstractCanalLifeCycle implements C
             super.start();
             // 如果存在provider,则启动metrics service
             loadCanalMetrics();
+            metrics.setServerPort(metricsPort);
             metrics.initialize();
             canalInstances = MigrateMap.makeComputingMap(new Function<String, CanalInstance>() {
 
@@ -529,4 +531,8 @@ public class CanalServerWithEmbedded extends AbstractCanalLifeCycle implements C
         this.canalInstanceGenerator = canalInstanceGenerator;
     }
 
+    public void setMetricsPort(int metricsPort) {
+        this.metricsPort = metricsPort;
+    }
+
 }

server/src/main/java/com/alibaba/otter/canal/spi/CanalMetricsService.java

@@ -39,4 +39,9 @@ public interface CanalMetricsService {
      */
     void unregister(CanalInstance instance);
 
+    /**
+     * @param port server port for pull
+     */
+    void setServerPort(int port);
+
 }

server/src/main/java/com/alibaba/otter/canal/spi/NopCanalMetricsService.java

@@ -35,4 +35,9 @@ public class NopCanalMetricsService implements CanalMetricsService {
     public void unregister(CanalInstance instance) {
 
     }
+
+    @Override
+    public void setServerPort(int port) {
+
+    }
 }