/*
*
* Copyright 2012 Netflix, Inc.
*
* 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 com.netflix.simianarmy.aws.janitor.crawler;
import java.util.Collections;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.amazonaws.services.autoscaling.model.AutoScalingInstanceDetails;
import com.amazonaws.services.ec2.model.Instance;
import com.amazonaws.services.ec2.model.Tag;
import com.netflix.simianarmy.Resource;
import com.netflix.simianarmy.ResourceType;
import com.netflix.simianarmy.aws.AWSResource;
import com.netflix.simianarmy.aws.AWSResourceType;
import com.netflix.simianarmy.client.aws.AWSClient;
/**
* The crawler to crawl AWS instances for janitor monkey.
*/
public class InstanceJanitorCrawler extends AbstractAWSJanitorCrawler {
/** The name representing the additional field name of ASG's name. */
public static final String INSTANCE_FIELD_ASG_NAME = "ASG_NAME";
/** The Constant LOGGER. */
private static final Logger LOGGER = LoggerFactory.getLogger(InstanceJanitorCrawler.class);
/**
* Instantiates a new basic instance crawler.
* @param awsClient
* the aws client
*/
public InstanceJanitorCrawler(AWSClient awsClient) {
super(awsClient);
}
@Override
public EnumSet<? extends ResourceType> resourceTypes() {
return EnumSet.of(AWSResourceType.INSTANCE);
}
@Override
public List<Resource> resources(ResourceType resourceType) {
if ("INSTANCE".equals(resourceType.name())) {
return getInstanceResources();
}
return Collections.emptyList();
}
@Override
public List<Resource> resources(String... resourceIds) {
return getInstanceResources(resourceIds);
}
private List<Resource> getInstanceResources(String... instanceIds) {
List<Resource> resources = new LinkedList<Resource>();
AWSClient awsClient = getAWSClient();
Map<String, AutoScalingInstanceDetails> idToASGInstance = new HashMap<String, AutoScalingInstanceDetails>();
for (AutoScalingInstanceDetails instanceDetails : awsClient.describeAutoScalingInstances(instanceIds)) {
idToASGInstance.put(instanceDetails.getInstanceId(), instanceDetails);
}
for (Instance instance : awsClient.describeInstances(instanceIds)) {
Resource instanceResource = new AWSResource().withId(instance.getInstanceId())
.withRegion(getAWSClient().region()).withResourceType(AWSResourceType.INSTANCE)
.withLaunchTime(instance.getLaunchTime());
for (Tag tag : instance.getTags()) {
instanceResource.setTag(tag.getKey(), tag.getValue());
}
String description = String.format("type=%s; host=%s", instance.getInstanceType(),
instance.getPublicDnsName() == null ? "" : instance.getPublicDnsName());
instanceResource.setDescription(description);
instanceResource.setOwnerEmail(getOwnerEmailForResource(instanceResource));
String asgName = getAsgName(instanceResource, idToASGInstance);
if (asgName != null) {
instanceResource.setAdditionalField(INSTANCE_FIELD_ASG_NAME, asgName);
LOGGER.info(String.format("instance %s has a ASG tag name %s.", instanceResource.getId(), asgName));
}
if (instance.getState() != null) {
((AWSResource) instanceResource).setAWSResourceState(instance.getState().getName());
}
resources.add(instanceResource);
}
return resources;
}
private String getAsgName(Resource instanceResource, Map<String, AutoScalingInstanceDetails> idToASGInstance) {
String asgName = instanceResource.getTag("aws:autoscaling:groupName");
if (asgName == null) {
// At most times the aws:autoscaling:groupName tag has the ASG name, but there are cases
// that the instance is not correctly tagged and we can find the ASG name from AutoScaling
// service.
AutoScalingInstanceDetails instanceDetails = idToASGInstance.get(instanceResource.getId());
if (instanceDetails != null) {
asgName = instanceDetails.getAutoScalingGroupName();
}
}
return asgName;
}
}