/**
* 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.whirr;
import static org.apache.whirr.service.ClusterActionHandler.BOOTSTRAP_ACTION;
import static org.apache.whirr.service.ClusterActionHandler.CONFIGURE_ACTION;
import static org.apache.whirr.service.ClusterActionHandler.DESTROY_ACTION;
import java.io.IOException;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import org.apache.whirr.Cluster.Instance;
import org.apache.whirr.actions.ByonClusterAction;
import org.apache.whirr.service.ClusterActionHandler;
import org.apache.whirr.state.ClusterStateStoreFactory;
import org.jclouds.compute.ComputeService;
import org.jclouds.compute.ComputeServiceContext;
import org.jclouds.compute.RunScriptOnNodesException;
import org.jclouds.compute.domain.ExecResponse;
import org.jclouds.compute.domain.NodeMetadata;
import org.jclouds.compute.options.RunScriptOptions;
import org.jclouds.scriptbuilder.domain.Statement;
import com.google.common.base.Function;
import com.google.common.base.Predicate;
import com.google.common.base.Predicates;
import com.google.common.cache.LoadingCache;
import com.google.common.collect.Collections2;
/**
* Equivalent of {@link ClusterController}, but for execution in BYON mode
* ("bring your own nodes").
*/
public class ByonClusterController extends ClusterController {
public ByonClusterController() {
super();
}
public ByonClusterController(Function<ClusterSpec, ComputeServiceContext> getCompute, ClusterStateStoreFactory stateStoreFactory) {
super(getCompute, stateStoreFactory);
}
@Override
public String getName() {
return "byon";
}
/**
* Destroys a whirr BYON cluster.
* Because this is a BYON cluster it also stops the services.
*/
@Override
public void destroyCluster(ClusterSpec clusterSpec) throws IOException,
InterruptedException {
stopServices(clusterSpec); // for BYON only
LoadingCache<String, ClusterActionHandler> handlerMap = handlerMapFactory
.create();
ClusterAction destroyer = new ByonClusterAction(DESTROY_ACTION,
getCompute(), handlerMap);
destroyer.execute(clusterSpec, null);
}
/**
* Provisions the hardware for a BYON cluster.
*/
@Override
public Cluster bootstrapCluster(ClusterSpec clusterSpec) throws IOException,
InterruptedException {
LoadingCache<String, ClusterActionHandler> handlerMap = handlerMapFactory
.create();
ClusterAction bootstrapper = new ByonClusterAction(BOOTSTRAP_ACTION,
getCompute(), handlerMap);
Cluster cluster = bootstrapper.execute(clusterSpec, null);
getClusterStateStore(clusterSpec).save(cluster);
return cluster;
}
/**
* Configures cluster services for a BYON cluster.
*/
@Override
public Cluster configureServices(ClusterSpec clusterSpec, Cluster cluster,
Set<String> targetRoles, Set<String> targetInstanceIds)
throws IOException, InterruptedException {
LoadingCache<String, ClusterActionHandler> handlerMap = handlerMapFactory
.create();
ClusterAction configurer = new ByonClusterAction(CONFIGURE_ACTION,
getCompute(), handlerMap);
cluster = configurer.execute(clusterSpec, cluster);
getClusterStateStore(clusterSpec).save(cluster);
return cluster;
}
public Map<? extends NodeMetadata, ExecResponse> runScriptOnNodesMatching(final ClusterSpec spec,
Predicate<NodeMetadata> condition, final Statement statement) throws IOException, RunScriptOnNodesException {
ComputeServiceContext computeServiceContext = getCompute().apply(spec);
ComputeService computeService = computeServiceContext.getComputeService();
Cluster cluster = getClusterStateStore(spec).load();
RunScriptOptions options = RunScriptOptions.Builder.runAsRoot(false).wrapInInitScript(false);
return computeService.runScriptOnNodesMatching(Predicates.<NodeMetadata>and(condition, runningIn(cluster)), statement, options);
}
private Predicate<NodeMetadata> runningIn(Cluster cluster) {
final Set<String> instanceIds = new HashSet<String>(Collections2.transform(cluster.getInstances(), new Function<Instance, String>() {
@Override
public String apply(Instance instance) {
return instance.getId();
}
}));
return new Predicate<NodeMetadata>() {
@Override
public boolean apply(final NodeMetadata nodeMetadata) {
return instanceIds.contains(nodeMetadata.getId()) && nodeMetadata.getStatus().equals(NodeMetadata.Status.RUNNING);
}
};
}
@Override
public void destroyInstance(ClusterSpec clusterSpec, String instanceId)
throws IOException {
// TODO
}
@Override
public Set<? extends NodeMetadata> getNodes(ClusterSpec clusterSpec)
throws IOException, InterruptedException {
ComputeServiceContext computeServiceContext = getCompute().apply(clusterSpec);
ComputeService computeService = computeServiceContext.getComputeService();
return computeService.listNodesDetailsMatching(Predicates.in(computeService.listNodes()));
}
}