Java tutorial
/* * 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.jclouds.examples.rackspace.cloudservers; import com.google.common.base.Predicate; import com.google.common.collect.ImmutableSet; import com.google.common.io.Closeables; import com.google.common.net.HostAndPort; import com.google.inject.Module; import org.jclouds.ContextBuilder; import org.jclouds.compute.ComputeService; import org.jclouds.compute.ComputeServiceContext; import org.jclouds.compute.RunNodesException; import org.jclouds.compute.domain.NodeMetadata; import org.jclouds.compute.domain.Template; import org.jclouds.compute.options.RunScriptOptions; import org.jclouds.openstack.nova.v2_0.domain.regionscoped.RegionAndId; import org.jclouds.predicates.SocketOpen; import org.jclouds.scriptbuilder.ScriptBuilder; import org.jclouds.scriptbuilder.domain.OsFamily; import org.jclouds.sshj.config.SshjSshClientModule; import java.io.Closeable; import java.io.IOException; import java.util.Arrays; import java.util.List; import java.util.Properties; import java.util.Set; import java.util.concurrent.TimeoutException; import static java.util.concurrent.TimeUnit.SECONDS; import static org.jclouds.compute.config.ComputeServiceProperties.POLL_INITIAL_PERIOD; import static org.jclouds.compute.config.ComputeServiceProperties.POLL_MAX_PERIOD; import static org.jclouds.examples.rackspace.cloudservers.Constants.*; import static org.jclouds.scriptbuilder.domain.Statements.exec; import static org.jclouds.util.Predicates2.retry; /** * This example creates a server, start a web server on it, and publish a page on the internet! */ public class CloudServersPublish implements Closeable { private final ComputeService computeService; private final int numServers; /** * To get a username and API key see * http://jclouds.apache.org/guides/rackspace/ * * The first argument (args[0]) must be your username * The second argument (args[1]) must be your API key * The optional third argument (args[2]) is the number of Cloud Servers to start */ public static void main(String[] args) throws IOException { getPublishedCloudServers(Arrays.asList(args)); } public static Set<? extends NodeMetadata> getPublishedCloudServers(List<String> args) throws IOException { CloudServersPublish cloudServersPublish = new CloudServersPublish(args); Set<? extends NodeMetadata> nodes = null; try { nodes = cloudServersPublish.createServer(); cloudServersPublish.configureAndStartWebserver(nodes); return nodes; } catch (Exception e) { e.printStackTrace(); } finally { cloudServersPublish.close(); } return nodes; } public CloudServersPublish(List<String> args) { String username = args.get(0); String apiKey = args.get(1); numServers = args.size() == 3 ? Integer.valueOf(args.get(2)) : 1; Iterable<Module> modules = ImmutableSet.<Module>of(new SshjSshClientModule()); // These properties control how often jclouds polls for a status update Properties overrides = new Properties(); overrides.setProperty(POLL_INITIAL_PERIOD, POLL_PERIOD_TWENTY_SECONDS); overrides.setProperty(POLL_MAX_PERIOD, POLL_PERIOD_TWENTY_SECONDS); ComputeServiceContext context = ContextBuilder.newBuilder(PROVIDER).credentials(username, apiKey) .overrides(overrides).modules(modules).buildView(ComputeServiceContext.class); computeService = context.getComputeService(); } private Set<? extends NodeMetadata> createServer() throws RunNodesException, TimeoutException { System.out.format("Create Server%n"); RegionAndId regionAndId = RegionAndId.fromRegionAndId(REGION, "performance1-1"); Template template = computeService.templateBuilder().locationId(REGION) .osDescriptionMatches(".*Ubuntu 14.04.*").hardwareId(regionAndId.slashEncode()).build(); // This method will continue to poll for the server status and won't return until this server is ACTIVE // 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 Set<? extends NodeMetadata> nodes = computeService.createNodesInGroup(NAME, numServers, template); for (NodeMetadata nodeMetadata : nodes) { System.out.format(" %s%n", nodeMetadata); } return nodes; } private void configureAndStartWebserver(Set<? extends NodeMetadata> nodes) throws TimeoutException { for (NodeMetadata nodeMetadata : nodes) { String publicAddress = nodeMetadata.getPublicAddresses().iterator().next(); String privateAddress = nodeMetadata.getPrivateAddresses().iterator().next(); System.out.format(" Configure And Start Webserver%n"); awaitSsh(publicAddress); String message = new StringBuilder().append("Hello from ").append(nodeMetadata.getHostname()) .append(" @ ").append(publicAddress).append("/").append(privateAddress).append(" in ") .append(nodeMetadata.getLocation().getParent().getId()).toString(); String script = new ScriptBuilder().addStatement(exec("apt-get -q -y update")) .addStatement(exec("apt-get -q -y install apache2")) .addStatement(exec("echo '" + message + "' > /var/www/index.html")).render(OsFamily.UNIX); RunScriptOptions options = RunScriptOptions.Builder.blockOnComplete(true); computeService.runScriptOnNode(nodeMetadata.getId(), script, options); System.out.format(" Login: ssh %s@%s%n", nodeMetadata.getCredentials().getUser(), publicAddress); System.out.format(" Password: %s%n", nodeMetadata.getCredentials().getOptionalPassword().get()); System.out.format(" Go to http://%s%n", publicAddress); } } private void awaitSsh(String ip) throws TimeoutException { SocketOpen socketOpen = computeService.getContext().utils().injector().getInstance(SocketOpen.class); Predicate<HostAndPort> socketTester = retry(socketOpen, 300, 5, 5, SECONDS); socketTester.apply(HostAndPort.fromParts(ip, 22)); } /** * Always close your service when you're done with it. */ public void close() throws IOException { Closeables.close(computeService.getContext(), true); } }