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* Licensed to jclouds, Inc. (jclouds) under one or more
* contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. jclouds 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.jclouds.examples.rackspace.cloudloadbalancers;
import static com.google.common.io.Closeables.closeQuietly;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeoutException;
import org.jclouds.ContextBuilder;
import org.jclouds.compute.domain.NodeMetadata;
import org.jclouds.examples.rackspace.cloudservers.CloudServersPublish;
import org.jclouds.rackspace.cloudloadbalancers.v1.CloudLoadBalancersApi;
import org.jclouds.rackspace.cloudloadbalancers.v1.domain.AddNode;
import org.jclouds.rackspace.cloudloadbalancers.v1.domain.CreateLoadBalancer;
import org.jclouds.rackspace.cloudloadbalancers.v1.domain.LoadBalancer;
import org.jclouds.rackspace.cloudloadbalancers.v1.domain.Node;
import org.jclouds.rackspace.cloudloadbalancers.v1.domain.VirtualIP;
import org.jclouds.rackspace.cloudloadbalancers.v1.domain.VirtualIPWithId;
import org.jclouds.rackspace.cloudloadbalancers.v1.features.LoadBalancerApi;
import org.jclouds.rackspace.cloudloadbalancers.v1.predicates.LoadBalancerPredicates;
import com.google.common.collect.Lists;
import com.google.common.collect.Sets;
/**
* This example creates a Load Balancer with new Cloud Servers on the Rackspace Cloud.
*
* @author Everett Toews
*/
public class CreateLoadBalancerWithNewServers {
private CloudLoadBalancersApi clb;
private LoadBalancerApi lbApi;
/**
* To get a username and API key see http://www.jclouds.org/documentation/quickstart/rackspace/
*
* The first argument (args[0]) must be your username
* The second argument (args[1]) must be your API key
*/
public static void main(String[] args) {
CreateLoadBalancerWithNewServers createLoadBalancer = new CreateLoadBalancerWithNewServers();
try {
List<String> argsList = Lists.newArrayList(args);
argsList.add("2"); // the number of Cloud Servers to start
Set<? extends NodeMetadata> nodes = CloudServersPublish.getPublishedCloudServers(argsList);
createLoadBalancer.init(args);
Set<AddNode> addNodes = createLoadBalancer.createNodeRequests(nodes);
createLoadBalancer.createLoadBalancer(addNodes);
}
catch (Exception e) {
e.printStackTrace();
}
finally {
createLoadBalancer.close();
}
}
private void init(String[] args) {
// The provider configures jclouds To use the Rackspace Cloud (US)
// To use the Rackspace Cloud (UK) set the provider to "rackspace-cloudloadbalancers-uk"
String provider = "rackspace-cloudloadbalancers-us";
String username = args[0];
String apiKey = args[1];
clb = ContextBuilder.newBuilder(provider)
.credentials(username, apiKey)
.buildApi(CloudLoadBalancersApi.class);
lbApi = clb.getLoadBalancerApiForZone(Constants.ZONE);
}
/**
* AddNodes specify the nodes (Cloud Servers) that requests will be sent to by the Load Balancer.
*/
private Set<AddNode> createNodeRequests(Set<? extends NodeMetadata> nodes) {
Set<AddNode> addNodes = Sets.newHashSet();
for (NodeMetadata node: nodes) {
String privateAddress = node.getPrivateAddresses().iterator().next();
AddNode addNode = AddNode.builder()
.address(privateAddress)
.condition(Node.Condition.ENABLED)
.port(80)
.weight(20)
.build();
addNodes.add(addNode);
}
return addNodes;
}
/**
* Create a Load Balancer that randomly distributes requests to its nodes. Normally you will want to use a
* different algorithm for your Load Balancers (see LoadBalancer.Algorithm) but random nicely demonstrates
* how requests are sent to diffent nodes when you reload the "Go to" URL printed out in the terminal.
*
* To see an example of creating a Load Balancer with existing Cloud Servers see
* CreateLoadBalancerWithExistingServers.
*/
private void createLoadBalancer(Set<AddNode> addNodes) throws TimeoutException {
System.out.println("Create Cloud Load Balancer");
CreateLoadBalancer createLB = CreateLoadBalancer.builder()
.name(Constants.NAME)
.protocol("HTTP")
.port(80)
.algorithm(LoadBalancer.Algorithm.RANDOM)
.nodes(addNodes)
.virtualIPType(VirtualIP.Type.PUBLIC)
.build();
LoadBalancer loadBalancer = lbApi.create(createLB);
// Wait for the Load Balancer to become Active before moving on
// If you want to know what's happening during the polling, enable logging. See
// /jclouds-example/rackspace/src/main/java/org/jclouds/examples/rackspace/Logging.java
if (!LoadBalancerPredicates.awaitAvailable(lbApi).apply(loadBalancer)) {
throw new TimeoutException("Timeout on loadBalancer: " + loadBalancer);
}
System.out.println(" " + loadBalancer);
System.out.println(" Go to http://" + getVirtualIPv4(loadBalancer.getVirtualIPs()));
}
private String getVirtualIPv4(Set<VirtualIPWithId> set) {
for (VirtualIPWithId virtualIP: set) {
if (virtualIP.getType().equals(VirtualIP.Type.PUBLIC) &&
virtualIP.getIpVersion().equals(VirtualIP.IPVersion.IPV4)) {
return virtualIP.getAddress();
}
}
throw new RuntimeException("Public IPv4 address not found.");
}
/**
* Always close your service when you're done with it.
*/
public void close() {
closeQuietly(clb);
}
}