Logging improvements

Comment out noisly loggers for the time being.

Improve the final logging statement to be useful and hint what the next active server for the client is going to be.

consul/server_manager/server_manager.go

@@ -286,6 +286,7 @@ FAILED_SERVER_DURING_REBALANCE:
 
 	// Early abort if there is no value to shuffling
 	if len(serverCfg.servers) < 2 {
+		// sm.logger.Printf("[INFO] server manager: can't rebalance with only %d servers", len(serverCfg.servers))
 		return
 	}
 
@@ -300,7 +301,7 @@ FAILED_SERVER_DURING_REBALANCE:
 		// while Serf detects the node has failed.
 		selectedServer := serverCfg.servers[0]
 
-		sm.logger.Printf("[INFO] server manager: Preemptively testing server %s before rebalance", selectedServer.String())
+		// sm.logger.Printf("[INFO] server manager: Preemptively testing server %s before rebalance", selectedServer.String())
 		ok := sm.connPoolPinger.PingConsulServer(selectedServer)
 		if ok {
 			foundHealthyServer = true
@@ -313,7 +314,7 @@ FAILED_SERVER_DURING_REBALANCE:
 	// the world a happy place again.
 	if !foundHealthyServer {
 		const backoffDuration = 1 * time.Second
-		sm.logger.Printf("[INFO] server manager: No servers available, sleeping for %v", backoffDuration)
+		// sm.logger.Printf("[INFO] server manager: No servers available, sleeping for %v", backoffDuration)
 
 		// Sleep with no locks
 		time.Sleep(backoffDuration)
@@ -379,7 +380,7 @@ FAILED_SERVER_DURING_REBALANCE:
 		goto FAILED_SERVER_DURING_REBALANCE
 	}
 
-	sm.logger.Printf("[INFO] server manager: Rebalancing server connections complete")
+	sm.logger.Printf("[INFO] server manager: Rebalanced %d servers, next active server is %s", len(serverCfg.servers), serverCfg.servers[0].String())
 	return
 }