Added a new live test (InstanceVolumeManagerLiveTest.java).

Changed the snapshot taking behavior: snapshot is deleted when it's no longer needed.
Exposed some of the object on InstanceVolumeManager for tests

aws/demos/resize-ebs/README.txt

@@ -12,3 +12,5 @@ Pre-requisites:
 - running EBS-backed instance at Amazon EC2
 - Ubuntu image
 - proper settings in place (EbsResizeMain or launcher.rb)
+- file system is ext3 (otherwise, change is needed in org.jclouds.tools.ebsresize.InstanceVolumeManager)
+- the demo doesn't take care of freezing the database, filesystem and application data

aws/demos/resize-ebs/resize-ebs-java/src/main/java/org/jclouds/tools/ebsresize/InstanceVolumeManager.java

@@ -23,6 +23,8 @@ import static com.google.common.base.Preconditions.checkState;
 
 import com.google.common.base.Predicate;
 import com.google.common.collect.Iterables;
+import com.google.inject.Module;
+import com.google.inject.internal.ImmutableSet;
 import org.jclouds.aws.domain.Region;
 import org.jclouds.aws.ec2.EC2AsyncClient;
 import org.jclouds.aws.ec2.EC2Client;
@@ -44,6 +46,7 @@ import org.jclouds.tools.ebsresize.util.SshExecutor;
 import java.io.IOException;
 import java.net.InetSocketAddress;
 import java.util.Map;
+import java.util.Properties;
 import java.util.concurrent.TimeUnit;
 
 /**
@@ -71,10 +74,14 @@ public class InstanceVolumeManager {
                 new RetryablePredicate<InetSocketAddress>(new SocketOpen(), 180, 5, TimeUnit.SECONDS);
 
     public InstanceVolumeManager(String accessKeyId, String secretKey) {
+        this(accessKeyId, secretKey, new Properties());
+    }
 
+    public InstanceVolumeManager(String accessKeyId, String secretKey, Properties overridesForContext) {
         try {
             context = new ComputeServiceContextFactory()
-                    .createContext("ec2", accessKeyId, secretKey);
+                    .createContext("ec2", accessKeyId, secretKey,
+                            ImmutableSet.<Module> of(), overridesForContext);
         } catch(IOException e) { throw new RuntimeException(e); }
 
         ec2context = context.getProviderSpecificContext();
@@ -142,6 +149,10 @@ public class InstanceVolumeManager {
                             /*or throw*/ "Couldn't connect to instance");
     }
 
+    public void closeContext() {
+        context.close();
+    }
+
     public ElasticBlockStoreFacade getEbsApi() {
         return ebsApi;
     }
@@ -153,4 +164,8 @@ public class InstanceVolumeManager {
     public EC2Client getApi() {
         return api;
     }
+
+    public ComputeServiceContext getContext() {
+        return context;
+    }
 }

aws/demos/resize-ebs/resize-ebs-java/src/main/java/org/jclouds/tools/ebsresize/facade/ElasticBlockStoreFacade.java

@@ -72,7 +72,6 @@ public class ElasticBlockStoreFacade {
                 "Only storage for instances with EBS type of root device can be resized.");
 
         String rootDevice = checkNotNull(runningInstance.getRootDeviceName());
-        runningInstance.getRootDeviceType();
 
         //get volume id
         String volumeId = null;
@@ -127,6 +126,7 @@ public class ElasticBlockStoreFacade {
         checkState(volumeAvailable.apply(newVolume),
                                 /*or throw*/ "Couldn't create a volume from the snapshot");
 
+        elasticBlockStoreServices.deleteSnapshotInRegion(volume.getRegion(), createdSnapshot.getId());
         return newVolume;
     }
 

aws/demos/resize-ebs/resize-ebs-java/src/test/java/org/jclouds/tools/ebsresize/InstanceVolumeManagerLiveTest.java

@@ -0,0 +1,199 @@
+/**
+ *
+ * Copyright (C) 2010 Cloud Conscious, LLC. <info@cloudconscious.com>
+ *
+ * ====================================================================
+ * Licensed 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.tools.ebsresize;
+
+import com.google.common.base.Charsets;
+import com.google.common.base.Predicate;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Iterables;
+import com.google.common.collect.Sets;
+import com.google.common.io.Files;
+import org.jclouds.aws.domain.Region;
+import org.jclouds.aws.ec2.domain.*;
+import org.jclouds.aws.ec2.domain.Volume;
+import org.jclouds.aws.ec2.predicates.InstanceStateRunning;
+import org.jclouds.aws.ec2.reference.EC2Constants;
+import org.jclouds.compute.ComputeService;
+import org.jclouds.compute.domain.*;
+import org.jclouds.domain.Credentials;
+import org.jclouds.predicates.RetryablePredicate;
+import org.testng.annotations.*;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.Properties;
+import java.util.SortedSet;
+import java.util.concurrent.TimeUnit;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static com.google.common.base.Preconditions.checkState;
+import static org.easymock.classextension.EasyMock.*;
+
+
+/**
+ * Tests the resizing of instance's root EBS device.
+ *
+ * This test creates an instance, then resizes its root volume
+ * (which includes stopping it) and terminates it afterwards.
+ *
+ * @author Oleksiy Yarmula
+ */
+@Test(groups = {"live" }, enabled = false, testName = "ec2.InstanceVolumeManagerLiveTest")
+public class InstanceVolumeManagerLiveTest {
+
+    private String tag;
+    private String secret;
+    private InstanceVolumeManager manager;
+    private ComputeService client;
+    private Template template;
+    private Predicate<RunningInstance> instanceRunning;
+    private RunningInstance instanceCreated;
+
+    @BeforeTest
+    public void setupClient() throws IOException {
+
+        //set up the constants needed to run
+        String user = checkNotNull(System.getProperty("jclouds.test.user"), "jclouds.test.user");
+        String password = checkNotNull(System.getProperty("jclouds.test.key"), "jclouds.test.key");
+
+        String secretKeyFile = checkNotNull(System.getProperty("jclouds.test.ssh.keyfile"),
+                "jclouds.test.ssh.keyfile");
+        tag = "ec2";
+
+        //ended setting up the constants
+
+        secret = Files.toString(new File(secretKeyFile), Charsets.UTF_8);
+        assert secret.startsWith("-----BEGIN RSA PRIVATE KEY-----") : "invalid key:\n" + secret;
+
+        //create a new manager
+        Properties testOnlyProperties = new Properties();
+        testOnlyProperties.put(EC2Constants.PROPERTY_EC2_AMI_OWNERS, "819060954727");
+        manager = new InstanceVolumeManager(user, password, testOnlyProperties);
+        client = manager.getContext().getComputeService();
+
+        TemplateBuilder templateBuilder = client.templateBuilder();
+        template =
+                templateBuilder.imageId("ami-2675974f").
+                        build();
+        template.getOptions().installPrivateKey(secret);
+
+        instanceRunning =
+                new RetryablePredicate<RunningInstance>(new InstanceStateRunning(manager.getApi().
+                        getInstanceServices()),
+                        600, 10, TimeUnit.SECONDS);
+    }
+
+    @Test
+    void testResizeVolume() {
+        SortedSet<NodeMetadata> nodes = Sets.newTreeSet(
+                client.runNodesWithTag(tag, 1, template).values()
+        );
+        assert nodes.size() == 1 : "Expected to have 1 nodes created; found: " + nodes.size();
+
+        NodeMetadata launchedNode = Iterables.getOnlyElement(nodes);
+
+        AvailabilityZone availabilityZone = AvailabilityZone.fromValue(launchedNode.getLocationId());
+        Region region = getRegionNameForAvailabilityZone(availabilityZone);
+
+        waitForInstanceInRunningState(launchedNode.getId(), region);
+
+        manager.resizeVolume(launchedNode.getId(), region, new Credentials("ubuntu", ""),
+                secret, 6);
+
+        instanceCreated =
+                Iterables.getOnlyElement(
+                        Iterables.getOnlyElement(
+                                manager.getApi().
+                                        getInstanceServices().
+                                        describeInstancesInRegion(region, launchedNode.getId()
+                                )
+                        )
+                );
+        Volume volumeAttached = manager.getEbsApi().getRootVolumeForInstance(instanceCreated);
+        assert volumeAttached.getSize() == 6;
+    }
+
+    @AfterTest
+    public void close() {
+        manager.getApi().getInstanceServices().terminateInstancesInRegion
+                (instanceCreated.getRegion(), instanceCreated.getId());
+        manager.closeContext();
+    }
+
+    /**
+     * Returns region that has the given availability zone, or null,
+     *  when nothing is found.
+     * This operates under the assumption that names of availability zones are
+     * unique, or else it returns the first matched region.
+     *
+     * @param zone
+     *          zone that needs to be matched with region. This can not be null.
+     * @return region
+     *          that has the provided zone
+     */
+    private Region getRegionNameForAvailabilityZone(AvailabilityZone zone) {
+        for (Region region : ImmutableSet.of(Region.DEFAULT, Region.EU_WEST_1, Region.US_EAST_1,
+                Region.US_WEST_1)) {
+            SortedSet<AvailabilityZoneInfo> allResults = Sets.newTreeSet(manager.getApi().
+                    getAvailabilityZoneAndRegionServices()
+                    .describeAvailabilityZonesInRegion(region));
+            for(AvailabilityZoneInfo zoneInfo : allResults) {
+                if(zone == zoneInfo.getZone()) return zoneInfo.getRegion();
+            }
+        }
+        return null; /*by contract*/
+    }
+
+    /**
+     * Blocks until the instance with given id and region is
+     *      in 'running' state.
+     *
+     * @param id
+     *          id of the instance being run
+     * @param region
+     *              region where the instance is launched
+     */
+    private void waitForInstanceInRunningState(String id, Region region) {
+        RunningInstance instanceMock =
+                createInstanceFromIdAndRegion(id, region);
+
+        checkState(instanceRunning.apply(instanceMock),
+                /*or throw*/ "Couldn't run the instance");
+    }
+
+    /**
+     * Uses EasyMock to create a mock {@link RunningInstance}.
+     *
+     * @param id
+     *          id of the instance
+     * @param region
+     *          region where it's launched
+     * @return
+     *        instance of mock {@link org.jclouds.aws.ec2.domain.RunningInstance}
+     */
+    private RunningInstance createInstanceFromIdAndRegion(String id, Region region) {
+        RunningInstance instanceMock = createMock(RunningInstance.class);
+        expect(instanceMock.getId()).andStubReturn(id);
+        expect(instanceMock.getRegion()).andStubReturn(region);
+        replay(instanceMock);
+        return instanceMock;
+    }
+
+}