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Add an example of using jclouds to create a GCE instance (based on a …
…Rackspace example)
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Mikołaj Zalewski authored and nacx committed Apr 27, 2014
1 parent 46fca7a commit 82f3903e089ca081c74e4288da4d4a7f38ba9abf
Showing 3 changed files with 270 additions and 0 deletions.
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<?xml version="1.0" encoding="UTF-8"?>
<!--
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.
-->
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<properties>
<jclouds.version>1.7.1</jclouds.version>
</properties>
<groupId>org.apache.jclouds.examples</groupId>
<artifactId>google-examples</artifactId>
<version>1.0</version>
<dependencies>
<dependency>
<groupId>org.apache.jclouds.driver</groupId>
<artifactId>jclouds-slf4j</artifactId>
<version>${jclouds.version}</version>
</dependency>
<dependency>
<groupId>org.apache.jclouds.driver</groupId>
<artifactId>jclouds-sshj</artifactId>
<version>${jclouds.version}</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.0.13</version>
</dependency>
<dependency>
<groupId>org.apache.jclouds.labs</groupId>
<artifactId>google-compute-engine</artifactId>
<version>${jclouds.version}</version>
</dependency>
</dependencies>
</project>
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/*
* 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.google.computeengine;

import static java.util.concurrent.TimeUnit.SECONDS;

/**
* Constants used by the Google Compute Engine Examples.
*
* @author Mikolaj Zalewski (based on code by Everett Toews)
*/
public interface Constants {
public static final String PROVIDER = System.getProperty("provider.cs", "google-compute-engine");
public static final String ZONE = System.getProperty("zone", "europe-west1-a");

public static final String NAME = "jclouds-example";
public static final String POLL_PERIOD_TWENTY_SECONDS = String.valueOf(SECONDS.toMillis(20));
}
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/*
* 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.google.computeengine;

import com.google.common.io.Closeables;
import com.google.common.io.Files;

import org.jclouds.ContextBuilder;
import org.jclouds.compute.ComputeService;
import org.jclouds.compute.ComputeServiceContext;
import org.jclouds.compute.RunNodesException;
import org.jclouds.compute.domain.Hardware;
import org.jclouds.compute.domain.Image;
import org.jclouds.compute.domain.NodeMetadata;
import org.jclouds.compute.domain.Template;

import java.io.Closeable;
import java.io.File;
import java.io.IOException;
import java.nio.charset.Charset;
import java.util.Properties;
import java.util.Set;
import java.util.concurrent.TimeoutException;

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.google.computeengine.Constants.*;

/**
* This example creates a Debian Wheezy server on a f1-micro instance on the
* Google Compute Engine.
*
* @author Mikolaj Zalewski (based on code by Everett Toews)
*/
public class CreateServer implements Closeable {
private final ComputeService computeService;

/**
* To get a service account and its private key see [TODO: write some
* documentation on the website and put a link to it]
*
* The first argument (args[0]) must be your service account email address
* The second argument (args[1]) must a path to your service account
* private key PEM file (without a password).
*/
public static void main(String[] args) throws IOException {
String key = Files.toString(new File(args[1]), Charset.defaultCharset());

CreateServer createServer = new CreateServer(args[0], key);

try {
createServer.createServer();
}
catch (Exception e) {
e.printStackTrace();
}
finally {
createServer.close();
}
}

public CreateServer(String serviceAccountEmailAddress, String serviceAccountKey) {
// 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(serviceAccountEmailAddress, serviceAccountKey)
.overrides(overrides)
.buildView(ComputeServiceContext.class);
computeService = context.getComputeService();
}

/**
* Create a server based on a Template. This method uses Template.hardwareId() and Template.imageId() to
* also demonstrate iterating through Hardware and Images. Alternatively you do the same without iterating
* using the following Template.
*
* Template template = computeService.templateBuilder()
* .locationId(getLocationId())
* .osFamily(OsFamily.CENTOS)
* .osVersionMatches("6")
* .minRam(28*1024)
* .build();
*/
private void createServer() throws RunNodesException, TimeoutException {
System.out.format("Create Server%n");

// TODO: make fromHardware(...) and fromImage(...) work as well. Currently,
// fromHardware chooses a deprecated platform and the call fails, while using
// hardwareId() and fromImage() causes no image to be found.
Template template = computeService.templateBuilder()
.locationId(ZONE)
.hardwareId(getHardware().getId())
.imageId(getImage().getId())
.build();

// This method will continue to poll for the server status and won't
// return until this server is ACTIVE.
// TODO: does GCE also log what's happening during the polling, like for
// Rackspace? If so, add an example for that.
Set<? extends NodeMetadata> nodes = computeService.createNodesInGroup(NAME, 1, template);

NodeMetadata nodeMetadata = nodes.iterator().next();
String publicAddress = nodeMetadata.getPublicAddresses().iterator().next();

System.out.format(" %s%n", nodeMetadata);
System.out.format(" Instance %s started with IP %s%n", nodeMetadata.getName(), publicAddress);
}

/**
* This method uses the generic ComputeService.listHardwareProfiles() to find the hardware profile.
*
* @return The Hardware for a f1-micro instance.
*/
private Hardware getHardware() {
System.out.format(" Hardware Profiles%n");

Set<? extends Hardware> profiles = computeService.listHardwareProfiles();
Hardware result = null;

for (Hardware profile: profiles) {
System.out.format(" %s%n", profile);
if (profile.getId().equals(ZONE + "/f1-micro")) {
result = profile;
}
}

if (result == null) {
System.err.println("f1-micro flavor not found. Using first flavor found.%n");
result = profiles.iterator().next();
}
return result;
}

/**
* This method uses the generic ComputeService.listImages() to find the image.
*
* @return A Debian Wheezy Image
*/
private Image getImage() {
System.out.format(" Images%n");

Set<? extends Image> images = computeService.listImages();
Image result = null;

for (Image image: images) {
System.out.format(" %s%n", image);
if (image.getOperatingSystem().getVersion().equals("debian.7.wheezy")) {
result = image;
}
}

if (result == null) {
System.err.println("Image with Debian Wheezy operating system not found. Using first image found.%n");
result = images.iterator().next();
}

return result;
}

/**
* Always close your service when you're done with it.
*/
public void close() throws IOException {
Closeables.close(computeService.getContext(), true);
}
}

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