Add a new node role 'cluster_manager' as the alternative for 'master' role and deprecate 'master' role #2424
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -34,13 +34,16 @@ | |
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| import org.opensearch.LegacyESVersion; | ||
| import org.opensearch.Version; | ||
| import org.opensearch.common.logging.DeprecationLogger; | ||
| import org.opensearch.common.settings.Setting; | ||
| import org.opensearch.common.settings.Setting.Property; | ||
| import org.opensearch.common.settings.Settings; | ||
| import org.opensearch.transport.RemoteClusterService; | ||
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| import java.util.Arrays; | ||
| import java.util.Collections; | ||
| import java.util.List; | ||
| import java.util.Locale; | ||
| import java.util.Objects; | ||
| import java.util.SortedSet; | ||
| import java.util.TreeSet; | ||
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@@ -50,6 +53,10 @@ | |
| */ | ||
| public abstract class DiscoveryNodeRole implements Comparable<DiscoveryNodeRole> { | ||
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| private static final DeprecationLogger deprecationLogger = DeprecationLogger.getLogger(DiscoveryNodeRole.class); | ||
| public static final String MASTER_ROLE_DEPRECATION_MESSAGE = | ||
| "Assigning [master] role in setting [node.roles] is deprecated. To promote inclusive language, please use [cluster_manager] role instead."; | ||
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| private final String roleName; | ||
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| /** | ||
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@@ -129,6 +136,13 @@ public DiscoveryNodeRole getCompatibilityRole(Version nodeVersion) { | |
| return this; | ||
| } | ||
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| /** | ||
| * Validate the role is compatible with the other roles in the list, when assigning the list of roles to a node. | ||
| * An {@link IllegalArgumentException} is expected to be thrown, if the role can't coexist with the other roles. | ||
| * @param roles a {@link List} of {@link DiscoveryNodeRole} that a node is going to have | ||
| */ | ||
| public void validateRole(List<DiscoveryNodeRole> roles) {}; | ||
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| @Override | ||
| public final boolean equals(Object o) { | ||
| if (this == o) return true; | ||
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@@ -193,15 +207,60 @@ public Setting<Boolean> legacySetting() { | |
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| /** | ||
| * Represents the role for a master-eligible node. | ||
| * @deprecated As of 2.0, because promoting inclusive language, replaced by {@link #CLUSTER_MANAGER_ROLE} | ||
| */ | ||
| @Deprecated | ||
| public static final DiscoveryNodeRole MASTER_ROLE = new DiscoveryNodeRole("master", "m") { | ||
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| @Override | ||
| public Setting<Boolean> legacySetting() { | ||
| // copy the setting here so we can mark it private in org.opensearch.node.Node | ||
| // As of 2.0, set the default value to 'false', so that MASTER_ROLE isn't added as a default value of NODE_ROLES_SETTING | ||
| return Setting.boolSetting("node.master", false, Property.Deprecated, Property.NodeScope); | ||
| } | ||
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| @Override | ||
| public void validateRole(List<DiscoveryNodeRole> roles) { | ||
| deprecationLogger.deprecate("node_role_master", MASTER_ROLE_DEPRECATION_MESSAGE); | ||
| } | ||
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| }; | ||
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| /** | ||
| * Represents the role for a cluster-manager-eligible node. | ||
| */ | ||
| public static final DiscoveryNodeRole CLUSTER_MANAGER_ROLE = new DiscoveryNodeRole("cluster_manager", "m") { | ||
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| @Override | ||
| public Setting<Boolean> legacySetting() { | ||
| // copy the setting here so we can mark it private in org.opensearch.node.Node | ||
| return Setting.boolSetting("node.master", true, Property.Deprecated, Property.NodeScope); | ||
| } | ||
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| @Override | ||
| public DiscoveryNodeRole getCompatibilityRole(Version nodeVersion) { | ||
| if (nodeVersion.onOrAfter(Version.V_2_0_0)) { | ||
| return this; | ||
| } else { | ||
| return DiscoveryNodeRole.MASTER_ROLE; | ||
| } | ||
| } | ||
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| @Override | ||
| public void validateRole(List<DiscoveryNodeRole> roles) { | ||
| if (roles.contains(DiscoveryNodeRole.MASTER_ROLE)) { | ||
| throw new IllegalArgumentException( | ||
| String.format( | ||
| Locale.ROOT, | ||
| "The two roles [%s, %s] can not be assigned together to a node. %s", | ||
| DiscoveryNodeRole.MASTER_ROLE.roleName(), | ||
| DiscoveryNodeRole.CLUSTER_MANAGER_ROLE.roleName(), | ||
| MASTER_ROLE_DEPRECATION_MESSAGE | ||
| ) | ||
| ); | ||
| } | ||
| } | ||
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There was a problem hiding this comment. @andrross Thanks for your opinion to not allow "master" role and "cluster_manager" role coexisting. 👍 😄 It's achieved by adding a method validateRole() to allow defining different validation rule for each role, to check the compatibility with the other roles in the setting |
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| }; | ||
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| public static final DiscoveryNodeRole REMOTE_CLUSTER_CLIENT_ROLE = new DiscoveryNodeRole("remote_cluster_client", "r") { | ||
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@@ -223,7 +282,7 @@ public Setting<Boolean> legacySetting() { | |
| * The built-in node roles. | ||
| */ | ||
| public static SortedSet<DiscoveryNodeRole> BUILT_IN_ROLES = Collections.unmodifiableSortedSet( | ||
| new TreeSet<>(Arrays.asList(DATA_ROLE, INGEST_ROLE, CLUSTER_MANAGER_ROLE, REMOTE_CLUSTER_CLIENT_ROLE)) | ||
| ); | ||
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| /** | ||
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@@ -262,4 +321,13 @@ public Setting<Boolean> legacySetting() { | |
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| } | ||
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| /** | ||
| * Check if the role is {@link #CLUSTER_MANAGER_ROLE} or {@link #MASTER_ROLE}. | ||
| * @deprecated As of 2.0, because promoting inclusive language. MASTER_ROLE is deprecated. | ||
| * @return true if the node role is{@link #CLUSTER_MANAGER_ROLE} or {@link #MASTER_ROLE} | ||
| */ | ||
| @Deprecated | ||
| public boolean isClusterManager() { | ||
| return this.equals(DiscoveryNodeRole.CLUSTER_MANAGER_ROLE) || this.equals(DiscoveryNodeRole.MASTER_ROLE); | ||
| } | ||
| } | ||
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isMasterNode -> isClusterManager?
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Such method is published into Maven as Java API (https://opensearch.org/javadocs/1.2.4/OpenSearch/server/build/docs/javadoc/org/opensearch/cluster/node/DiscoveryNode.html#isMasterNode()), so I'm not going to change the name soon, in case any plugins or clients are using the method, though maybe no other software using it 😅.
I think the normal way is to deprecate this method and create new method aside, but it will be a huge work to deprecate all the methods/classes with the mane "master", so I'm planning to rename them in place in next major version.
Of course, I think there is an option to choose a few common used methods to follow the normal deprecation path. I haven't got a decision which method to rename in place, and which to create alternative method aside.
There is a discussion in the PR #2453, you could take a look at. Renaming the Java APIs is tracked in issue #1684
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Deprecating isMaster in favour of isClusterManager sounds like a plan
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I will mark it in an issue and deprecate it another PR. Thank you!