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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| package com.amazon.jenkins.ec2fleet; | ||
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| import com.amazonaws.services.ec2.AmazonEC2; | ||
| import com.amazonaws.services.ec2.model.AmazonEC2Exception; | ||
| import com.amazonaws.services.ec2.model.DescribeInstancesRequest; | ||
| import com.amazonaws.services.ec2.model.DescribeInstancesResult; | ||
| import com.amazonaws.services.ec2.model.Instance; | ||
| import com.amazonaws.services.ec2.model.InstanceStateName; | ||
| import com.amazonaws.services.ec2.model.Reservation; | ||
| import com.google.common.collect.ImmutableSet; | ||
| import com.google.common.collect.Lists; | ||
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| import java.util.ArrayList; | ||
| import java.util.Collections; | ||
| import java.util.HashSet; | ||
| import java.util.List; | ||
| import java.util.Set; | ||
| import java.util.regex.Matcher; | ||
| import java.util.regex.Pattern; | ||
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| @SuppressWarnings("WeakerAccess") | ||
| public class EC2Api { | ||
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| private static final ImmutableSet<String> TERMINATED_STATES = ImmutableSet.of( | ||
| InstanceStateName.Terminated.toString(), | ||
| InstanceStateName.Stopped.toString(), | ||
| InstanceStateName.Stopping.toString(), | ||
| InstanceStateName.ShuttingDown.toString() | ||
| ); | ||
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| private static final int BATCH_SIZE = 900; | ||
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| private static final String NOT_FOUND_ERROR_CODE = "InvalidInstanceID.NotFound"; | ||
| private static final Pattern INSTANCE_ID_PATTERN = Pattern.compile("(i-[0-9a-zA-Z]+)"); | ||
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| private static List<String> parseInstanceIdsFromNotFoundException(final String errorMessage) { | ||
| final Matcher fullMessageMatcher = INSTANCE_ID_PATTERN.matcher(errorMessage); | ||
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| final List<String> instanceIds = new ArrayList<>(); | ||
| while (fullMessageMatcher.find()) { | ||
| instanceIds.add(fullMessageMatcher.group(1)); | ||
| } | ||
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| return instanceIds; | ||
| } | ||
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| public static Set<String> describeTerminated(final AmazonEC2 ec2, final Set<String> instanceIds) { | ||
| return describeTerminated(ec2, instanceIds, BATCH_SIZE); | ||
| } | ||
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| public static Set<String> describeTerminated(final AmazonEC2 ec2, final Set<String> instanceIds, final int batchSize) { | ||
| // assume all terminated until we get opposite info | ||
| final Set<String> terminated = new HashSet<>(instanceIds); | ||
| // don't do actual call if no data | ||
| if (instanceIds.isEmpty()) return terminated; | ||
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| final List<List<String>> batches = Lists.partition(new ArrayList<>(instanceIds), batchSize); | ||
| for (final List<String> batch : batches) { | ||
| describeTerminatedBatch(ec2, terminated, batch); | ||
| } | ||
| return terminated; | ||
| } | ||
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| private static void describeTerminatedBatch(final AmazonEC2 ec2, final Set<String> terminated, final List<String> batch) { | ||
| // we are going to modify list, so copy | ||
| final List<String> copy = new ArrayList<>(batch); | ||
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| // just to simplify debug by having consist order | ||
| Collections.sort(copy); | ||
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| // because instances could be terminated at any time we do multiple | ||
| // retry to get status and all time remove from request all non found instances if any | ||
| while (copy.size() > 0) { | ||
| try { | ||
| final DescribeInstancesRequest request = new DescribeInstancesRequest().withInstanceIds(copy); | ||
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| DescribeInstancesResult result; | ||
| do { | ||
| result = ec2.describeInstances(request); | ||
| request.setNextToken(result.getNextToken()); | ||
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| for (final Reservation r : result.getReservations()) { | ||
| for (final Instance instance : r.getInstances()) { | ||
| // if instance not in terminated state, remove it from terminated | ||
| if (!TERMINATED_STATES.contains(instance.getState().getName())) { | ||
| terminated.remove(instance.getInstanceId()); | ||
| } | ||
| } | ||
| } | ||
| } while (result.getNextToken() != null); | ||
|
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| // all good, clear request batch to stop | ||
| copy.clear(); | ||
| } catch (final AmazonEC2Exception exception) { | ||
| // if we cannot find instance, that's fine assume them as terminated | ||
| // remove from request and try again | ||
| if (exception.getErrorCode().equals(NOT_FOUND_ERROR_CODE)) { | ||
| final List<String> notFoundInstanceIds = parseInstanceIdsFromNotFoundException(exception.getMessage()); | ||
| if (notFoundInstanceIds.isEmpty()) { | ||
| // looks like we cannot parse correctly, rethrow | ||
| throw exception; | ||
| } | ||
| copy.removeAll(notFoundInstanceIds); | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| } |
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