/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.cassandra.locator; import java.io.IOException; import java.net.InetAddress; import org.apache.cassandra.exceptions.ConfigurationException; import org.apache.cassandra.config.DatabaseDescriptor; import org.apache.cassandra.gms.ApplicationState; import org.apache.cassandra.gms.Gossiper; import org.apache.cassandra.service.StorageService; /** * 1) Snitch will automatically set the public IP by querying the AWS API * * 2) Snitch will set the private IP as a Gossip application state. * * 3) Uses a helper class that implements IESCS and will reset the public IP connection if it is within the * same region to communicate via private IP. * * Operational: All the nodes in this cluster needs to be able to (modify the * Security group settings in AWS) communicate via Public IP's. */ public class Ec2MultiRegionSnitch extends Ec2Snitch { private static final String PUBLIC_IP_QUERY_URL = "http://169.254.169.254/latest/meta-data/public-ipv4"; private static final String PRIVATE_IP_QUERY_URL = "http://169.254.169.254/latest/meta-data/local-ipv4"; private final InetAddress localPublicAddress; private final String localPrivateAddress; public Ec2MultiRegionSnitch() throws IOException, ConfigurationException { super(); localPublicAddress = InetAddress.getByName(awsApiCall(PUBLIC_IP_QUERY_URL)); logger.info("EC2Snitch using publicIP as identifier: " + localPublicAddress); localPrivateAddress = awsApiCall(PRIVATE_IP_QUERY_URL); // use the Public IP to broadcast Address to other nodes. DatabaseDescriptor.setBroadcastAddress(localPublicAddress); } public void gossiperStarting() { super.gossiperStarting(); Gossiper.instance.addLocalApplicationState(ApplicationState.INTERNAL_IP, StorageService.instance.valueFactory.internalIP(localPrivateAddress)); Gossiper.instance.register(new ReconnectableSnitchHelper(this, ec2region, true)); } }