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ILM action to wait for SLM policy execution (elastic#50454)
This change add new ILM action to wait for SLM policy execution to ensure that index has snapshot before deletion. Closes elastic#45067
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96 changes: 96 additions & 0 deletions
96
x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/ilm/WaitForSnapshotAction.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| /* | ||
| * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one | ||
| * or more contributor license agreements. Licensed under the Elastic License; | ||
| * you may not use this file except in compliance with the Elastic License. | ||
| */ | ||
| package org.elasticsearch.xpack.core.ilm; | ||
|
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| import org.elasticsearch.client.Client; | ||
| import org.elasticsearch.common.ParseField; | ||
| import org.elasticsearch.common.Strings; | ||
| import org.elasticsearch.common.io.stream.StreamInput; | ||
| import org.elasticsearch.common.io.stream.StreamOutput; | ||
| import org.elasticsearch.common.xcontent.ConstructingObjectParser; | ||
| import org.elasticsearch.common.xcontent.XContentBuilder; | ||
| import org.elasticsearch.common.xcontent.XContentParser; | ||
| import org.elasticsearch.xpack.core.ilm.Step.StepKey; | ||
|
|
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| import java.io.IOException; | ||
| import java.util.Collections; | ||
| import java.util.List; | ||
| import java.util.Objects; | ||
|
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| /** | ||
| * A {@link LifecycleAction} which waits for snapshot to be taken (by configured SLM policy). | ||
| */ | ||
| public class WaitForSnapshotAction implements LifecycleAction { | ||
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| public static final String NAME = "wait_for_snapshot"; | ||
| public static final ParseField POLICY_FIELD = new ParseField("policy"); | ||
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| private static final ConstructingObjectParser<WaitForSnapshotAction, Void> PARSER = new ConstructingObjectParser<>(NAME, | ||
| a -> new WaitForSnapshotAction((String) a[0])); | ||
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| static { | ||
| PARSER.declareString(ConstructingObjectParser.constructorArg(), POLICY_FIELD); | ||
| } | ||
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| private final String policy; | ||
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| public static WaitForSnapshotAction parse(XContentParser parser) { | ||
| return PARSER.apply(parser, null); | ||
| } | ||
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| public WaitForSnapshotAction(String policy) { | ||
| if (Strings.hasText(policy) == false) { | ||
| throw new IllegalArgumentException("policy name must be specified"); | ||
| } | ||
| this.policy = policy; | ||
| } | ||
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| public WaitForSnapshotAction(StreamInput in) throws IOException { | ||
| this(in.readString()); | ||
| } | ||
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| @Override | ||
| public List<Step> toSteps(Client client, String phase, StepKey nextStepKey) { | ||
| StepKey waitForSnapshotKey = new StepKey(phase, NAME, WaitForSnapshotStep.NAME); | ||
| return Collections.singletonList(new WaitForSnapshotStep(waitForSnapshotKey, nextStepKey, policy)); | ||
| } | ||
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| @Override | ||
| public boolean isSafeAction() { | ||
| return true; | ||
| } | ||
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| @Override | ||
| public String getWriteableName() { | ||
| return NAME; | ||
| } | ||
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| @Override | ||
| public void writeTo(StreamOutput out) throws IOException { | ||
| out.writeString(policy); | ||
| } | ||
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| @Override | ||
| public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException { | ||
| builder.startObject(); | ||
| builder.field(POLICY_FIELD.getPreferredName(), policy); | ||
| builder.endObject(); | ||
| return builder; | ||
| } | ||
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| @Override | ||
| public boolean equals(Object o) { | ||
| if (this == o) return true; | ||
| if (o == null || getClass() != o.getClass()) return false; | ||
| WaitForSnapshotAction that = (WaitForSnapshotAction) o; | ||
| return policy.equals(that.policy); | ||
| } | ||
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| @Override | ||
| public int hashCode() { | ||
| return Objects.hash(policy); | ||
| } | ||
| } |
101 changes: 101 additions & 0 deletions
101
x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/ilm/WaitForSnapshotStep.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| /* | ||
| * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one | ||
| * or more contributor license agreements. Licensed under the Elastic License; | ||
| * you may not use this file except in compliance with the Elastic License. | ||
| */ | ||
| package org.elasticsearch.xpack.core.ilm; | ||
|
|
||
| import org.elasticsearch.cluster.ClusterState; | ||
| import org.elasticsearch.cluster.metadata.IndexMetaData; | ||
| import org.elasticsearch.common.xcontent.ToXContentObject; | ||
| import org.elasticsearch.index.Index; | ||
| import org.elasticsearch.xpack.core.slm.SnapshotLifecycleMetadata; | ||
| import org.elasticsearch.xpack.core.slm.SnapshotLifecyclePolicyMetadata; | ||
|
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| import java.util.Date; | ||
| import java.util.Locale; | ||
| import java.util.Objects; | ||
|
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| /*** | ||
| * A step that waits for snapshot to be taken by SLM to ensure we have backup before we delete the index. | ||
| * It will signal error if it can't get data needed to do the check (phase time from ILM and SLM metadata) | ||
| * and will only return success if execution of SLM policy took place after index entered deleted phase. | ||
| */ | ||
| public class WaitForSnapshotStep extends ClusterStateWaitStep { | ||
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| static final String NAME = "wait-for-snapshot"; | ||
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| private static final String MESSAGE_FIELD = "message"; | ||
| private static final String POLICY_NOT_EXECUTED_MESSAGE = "waiting for policy '%s' to be executed since %s"; | ||
| private static final String POLICY_NOT_FOUND_MESSAGE = "configured policy '%s' not found"; | ||
| private static final String NO_INDEX_METADATA_MESSAGE = "no index metadata found for index '%s'"; | ||
| private static final String NO_PHASE_TIME_MESSAGE = "no information about ILM phase start in index metadata for index '%s'"; | ||
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| private final String policy; | ||
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| WaitForSnapshotStep(StepKey key, StepKey nextStepKey, String policy) { | ||
| super(key, nextStepKey); | ||
| this.policy = policy; | ||
| } | ||
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| @Override | ||
| public Result isConditionMet(Index index, ClusterState clusterState) { | ||
| IndexMetaData indexMetaData = clusterState.metaData().index(index); | ||
| if (indexMetaData == null) { | ||
| throw error(NO_INDEX_METADATA_MESSAGE, index.getName()); | ||
| } | ||
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| Long phaseTime = LifecycleExecutionState.fromIndexMetadata(indexMetaData).getPhaseTime(); | ||
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| if (phaseTime == null) { | ||
| throw error(NO_PHASE_TIME_MESSAGE, index.getName()); | ||
| } | ||
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| SnapshotLifecycleMetadata snapMeta = clusterState.metaData().custom(SnapshotLifecycleMetadata.TYPE); | ||
| if (snapMeta == null || snapMeta.getSnapshotConfigurations().containsKey(policy) == false) { | ||
| throw error(POLICY_NOT_FOUND_MESSAGE, policy); | ||
| } | ||
| SnapshotLifecyclePolicyMetadata snapPolicyMeta = snapMeta.getSnapshotConfigurations().get(policy); | ||
| if (snapPolicyMeta.getLastSuccess() == null || snapPolicyMeta.getLastSuccess().getTimestamp() < phaseTime) { | ||
| return new Result(false, notExecutedMessage(phaseTime)); | ||
| } | ||
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| return new Result(true, null); | ||
| } | ||
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| public String getPolicy() { | ||
| return policy; | ||
| } | ||
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| @Override | ||
| public boolean isRetryable() { | ||
| return true; | ||
| } | ||
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| private ToXContentObject notExecutedMessage(long time) { | ||
| return (builder, params) -> { | ||
| builder.startObject(); | ||
| builder.field(MESSAGE_FIELD, String.format(Locale.ROOT, POLICY_NOT_EXECUTED_MESSAGE, policy, new Date(time))); | ||
| builder.endObject(); | ||
| return builder; | ||
| }; | ||
| } | ||
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| private IllegalStateException error(String message, Object... args) { | ||
| return new IllegalStateException(String.format(Locale.ROOT, message, args)); | ||
| } | ||
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| @Override | ||
| public boolean equals(Object o) { | ||
| if (this == o) return true; | ||
| if (o == null || getClass() != o.getClass()) return false; | ||
| if (!super.equals(o)) return false; | ||
| WaitForSnapshotStep that = (WaitForSnapshotStep) o; | ||
| return policy.equals(that.policy); | ||
| } | ||
|
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| @Override | ||
| public int hashCode() { | ||
| return Objects.hash(super.hashCode(), policy); | ||
| } | ||
| } |
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56 changes: 56 additions & 0 deletions
56
...lugin/core/src/test/java/org/elasticsearch/xpack/core/ilm/WaitForSnapshotActionTests.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| /* | ||
| * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one | ||
| * or more contributor license agreements. Licensed under the Elastic License; | ||
| * you may not use this file except in compliance with the Elastic License. | ||
| */ | ||
| package org.elasticsearch.xpack.core.ilm; | ||
|
|
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| import org.elasticsearch.common.io.stream.Writeable; | ||
| import org.elasticsearch.common.xcontent.XContentParser; | ||
|
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| import java.io.IOException; | ||
| import java.util.List; | ||
|
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| public class WaitForSnapshotActionTests extends AbstractActionTestCase<WaitForSnapshotAction> { | ||
|
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| @Override | ||
| public void testToSteps() { | ||
| WaitForSnapshotAction action = createTestInstance(); | ||
| Step.StepKey nextStep = new Step.StepKey("", "", ""); | ||
| List<Step> steps = action.toSteps(null, "delete", nextStep); | ||
| assertEquals(1, steps.size()); | ||
| Step step = steps.get(0); | ||
| assertTrue(step instanceof WaitForSnapshotStep); | ||
| assertEquals(nextStep, step.getNextStepKey()); | ||
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| Step.StepKey key = step.getKey(); | ||
| assertEquals("delete", key.getPhase()); | ||
| assertEquals(WaitForSnapshotAction.NAME, key.getAction()); | ||
| assertEquals(WaitForSnapshotStep.NAME, key.getName()); | ||
| } | ||
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| @Override | ||
| protected WaitForSnapshotAction doParseInstance(XContentParser parser) throws IOException { | ||
| return WaitForSnapshotAction.parse(parser); | ||
| } | ||
|
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| @Override | ||
| protected WaitForSnapshotAction createTestInstance() { | ||
| return randomInstance(); | ||
| } | ||
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| @Override | ||
| protected Writeable.Reader<WaitForSnapshotAction> instanceReader() { | ||
| return WaitForSnapshotAction::new; | ||
| } | ||
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| @Override | ||
| protected WaitForSnapshotAction mutateInstance(WaitForSnapshotAction instance) throws IOException { | ||
| return randomInstance(); | ||
| } | ||
|
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| static WaitForSnapshotAction randomInstance() { | ||
| return new WaitForSnapshotAction(randomAlphaOfLengthBetween(5, 10)); | ||
| } | ||
|
|
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| } |
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