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Disallow multiple data paths for search nodes #6427

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merged 7 commits into from
Feb 23, 2023
Merged

Disallow multiple data paths for search nodes #6427

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1207b53
Add bootstrap check to avoid search node has multiple data path
xuezhou25 Feb 21, 2023
d1a7b87
Add changelog
xuezhou25 Feb 22, 2023
6a3cb90
Modify comments
xuezhou25 Feb 23, 2023
8633846
Merge branch 'main' into Prevent_search_node_startup_for_multiple_dat…
xuezhou25 Feb 23, 2023
411e7a5
fix spotless check
xuezhou25 Feb 23, 2023
ec4a3d6
Modify comments
xuezhou25 Feb 23, 2023
c9ff4d1
Remove duplication
xuezhou25 Feb 23, 2023
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1 change: 1 addition & 0 deletions CHANGELOG.md
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Expand Up @@ -70,6 +70,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
## [Unreleased 2.x]
### Added
- Add GeoTile and GeoHash Grid aggregations on GeoShapes. ([#5589](https://github.com/opensearch-project/OpenSearch/pull/5589))
- Disallow multiple data paths for search nodes ([#6427](https://github.com/opensearch-project/OpenSearch/pull/6427))

### Dependencies

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25 changes: 25 additions & 0 deletions server/src/main/java/org/opensearch/bootstrap/BootstrapChecks.java
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Expand Up @@ -38,15 +38,18 @@
import org.apache.lucene.util.Constants;
import org.opensearch.bootstrap.jvm.DenyJvmVersionsParser;
import org.opensearch.cluster.coordination.ClusterBootstrapService;
import org.opensearch.cluster.node.DiscoveryNodeRole;
import org.opensearch.common.SuppressForbidden;
import org.opensearch.common.io.PathUtils;
import org.opensearch.common.settings.Setting;
import org.opensearch.common.transport.BoundTransportAddress;
import org.opensearch.common.transport.TransportAddress;
import org.opensearch.discovery.DiscoveryModule;
import org.opensearch.env.Environment;
import org.opensearch.index.IndexModule;
import org.opensearch.monitor.jvm.JvmInfo;
import org.opensearch.monitor.process.ProcessProbe;
import org.opensearch.node.NodeRoleSettings;
import org.opensearch.node.NodeValidationException;

import java.io.BufferedReader;
Expand Down Expand Up @@ -228,6 +231,7 @@ static List<BootstrapCheck> checks() {
checks.add(new JavaVersionCheck());
checks.add(new AllPermissionCheck());
checks.add(new DiscoveryConfiguredCheck());
checks.add(new MultipleDataPathCheck());
return Collections.unmodifiableList(checks);
}

Expand Down Expand Up @@ -751,4 +755,25 @@ public BootstrapCheckResult check(BootstrapContext context) {
);
}
}

/**
* Bootstrap check that if a search node contains multiple data paths
*/
static class MultipleDataPathCheck implements BootstrapCheck {
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Can this be private?

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Why should this class be private? I think it is reasonable to be default

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The answer to my question is "no" because it is referenced in the unit test, which I missed when I made this comment :)


@Override
public BootstrapCheckResult check(BootstrapContext context) {
if (NodeRoleSettings.NODE_ROLES_SETTING.get(context.settings()).contains(DiscoveryNodeRole.SEARCH_ROLE)
&& Environment.PATH_DATA_SETTING.get(context.settings()).size() > 1) {
return BootstrapCheckResult.failure("Multiple data paths are not allowed for search nodes");
}
return BootstrapCheckResult.success();
}

@Override
public final boolean alwaysEnforce() {
return true;
}

}
}
42 changes: 42 additions & 0 deletions server/src/test/java/org/opensearch/bootstrap/BootstrapChecksTests.java
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Expand Up @@ -36,19 +36,24 @@
import org.apache.lucene.util.Constants;
import org.opensearch.cluster.coordination.ClusterBootstrapService;
import org.opensearch.cluster.metadata.Metadata;
import org.opensearch.cluster.node.DiscoveryNodeRole;
import org.opensearch.common.CheckedConsumer;
import org.opensearch.common.io.PathUtils;
import org.opensearch.common.settings.Settings;
import org.opensearch.common.transport.BoundTransportAddress;
import org.opensearch.common.transport.TransportAddress;
import org.opensearch.discovery.DiscoveryModule;
import org.opensearch.discovery.SettingsBasedSeedHostsProvider;
import org.opensearch.env.Environment;
import org.opensearch.monitor.jvm.JvmInfo;
import org.opensearch.node.NodeRoleSettings;
import org.opensearch.node.NodeValidationException;
import org.opensearch.test.AbstractBootstrapCheckTestCase;
import org.hamcrest.Matcher;

import java.lang.Runtime.Version;
import java.net.InetAddress;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
Expand Down Expand Up @@ -774,4 +779,41 @@ Version getVersion() {
version.set(Runtime.version());
BootstrapChecks.check(emptyContext, true, Collections.singletonList(check));
}

public void testMultipleDataPathsForSearchNodeCheck() {
Path path = PathUtils.get(createTempDir().toString());
String[] paths = new String[] { path.resolve("a").toString(), path.resolve("b").toString() };

final NodeValidationException e = expectThrows(
NodeValidationException.class,
() -> performDataPathsCheck(paths, DiscoveryNodeRole.SEARCH_ROLE.roleName())
);
assertThat(e.getMessage(), containsString("Multiple data paths are not allowed for search nodes"));
}
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@gashutos gashutos Feb 23, 2023 •
edited
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Would this kind of private method help to remove some duplicate effort ?

public void performDataPathsCheck(String[] paths, String roleName) throws NodeValidationException {
         final BootstrapContext context = createTestContext(
            Settings.builder()
                .putList(NodeRoleSettings.NODE_ROLES_SETTING.getKey(), Collections.singletonList(roleName))
                .putList(Environment.PATH_DATA_SETTING.getKey(), paths)
                .build(),
            Metadata.EMPTY_METADATA
        );
        final List<BootstrapCheck> checks = Collections.singletonList(new BootstrapChecks.MultipleDataPathCheck());
        BootstrapChecks.check(emptyContext, true, checks);
    }


public void testMultipleDataPathsForDataNodeCheck() throws NodeValidationException {
Path path = PathUtils.get(createTempDir().toString());
String[] paths = new String[] { path.resolve("a").toString(), path.resolve("b").toString() };

performDataPathsCheck(paths, DiscoveryNodeRole.DATA_ROLE.roleName());
}

public void testSingleDataPathForSearchNodeCheck() throws NodeValidationException {
Path path = PathUtils.get(createTempDir().toString());
String[] paths = new String[] { path.resolve("a").toString() };

performDataPathsCheck(paths, DiscoveryNodeRole.SEARCH_ROLE.roleName());
}

private void performDataPathsCheck(String[] paths, String roleName) throws NodeValidationException {
final BootstrapContext context = createTestContext(
Settings.builder()
.putList(NodeRoleSettings.NODE_ROLES_SETTING.getKey(), Collections.singletonList(roleName))
.putList(Environment.PATH_DATA_SETTING.getKey(), paths)
.build(),
Metadata.EMPTY_METADATA
);
final List<BootstrapCheck> checks = Collections.singletonList(new BootstrapChecks.MultipleDataPathCheck());
BootstrapChecks.check(context, true, checks);
}
}