Unify blob store compress setting

docs/reference/migration/migrate_8_0.asciidoc

@@ -12,6 +12,7 @@ See also <<release-highlights>> and <<es-release-notes>>.
 coming[8.0.0]
 
 * <<breaking_80_mappings_changes>>
+* <<breaking_80_snapshots_changes>>
 
 [float]
 === Indices created before 7.0
@@ -29,4 +30,5 @@ Elasticsearch 7.x in order to be readable by Elasticsearch 8.x.
 
 =========================================
 
-include::migrate_8_0/mappings.asciidoc[]
+include::migrate_8_0/mappings.asciidoc[]
+include::migrate_8_0/snapshots.asciidoc[]

docs/reference/migration/migrate_8_0/snapshots.asciidoc

@@ -0,0 +1,13 @@
+[float]
+[[breaking_80_snapshots_changes]]
+=== Snapshot and Restore changes
+
+[float]
+==== Deprecated node level compress setting removed
+
+For shared file system repositories (`"type": "fs"`), the node level setting `repositories.fs.compress` could
+previously be used to enable compression for all shared file system repositories where `compress` was not specified.
+The `repositories.fs.compress` setting has been removed.
+
+Instead use the repository specific `compress` setting to enable compression. See <<modules-snapshots>> for information
+on the `compress` setting.

modules/repository-url/src/main/java/org/elasticsearch/repositories/url/URLRepository.java

@@ -83,7 +83,7 @@ public class URLRepository extends BlobStoreRepository {
      */
     public URLRepository(RepositoryMetaData metadata, Environment environment,
                          NamedXContentRegistry namedXContentRegistry) {
-        super(metadata, environment.settings(), false, namedXContentRegistry);
+        super(metadata, environment.settings(), namedXContentRegistry);
 
         if (URL_SETTING.exists(metadata.settings()) == false && REPOSITORIES_URL_SETTING.exists(environment.settings()) ==  false) {
             throw new RepositoryException(metadata.name(), "missing url");

plugins/repository-azure/src/main/java/org/elasticsearch/repositories/azure/AzureRepository.java

@@ -75,21 +75,18 @@ public static final class Repository {
                 s -> LocationMode.PRIMARY_ONLY.toString(), s -> LocationMode.valueOf(s.toUpperCase(Locale.ROOT)), Property.NodeScope);
         public static final Setting<ByteSizeValue> CHUNK_SIZE_SETTING =
             Setting.byteSizeSetting("chunk_size", MAX_CHUNK_SIZE, MIN_CHUNK_SIZE, MAX_CHUNK_SIZE, Property.NodeScope);
-        public static final Setting<Boolean> COMPRESS_SETTING = Setting.boolSetting("compress", false, Property.NodeScope);
         public static final Setting<Boolean> READONLY_SETTING = Setting.boolSetting("readonly", false, Property.NodeScope);
     }
 
     private final BlobPath basePath;
     private final ByteSizeValue chunkSize;
-    private final Environment environment;
     private final AzureStorageService storageService;
     private final boolean readonly;
 
     public AzureRepository(RepositoryMetaData metadata, Environment environment, NamedXContentRegistry namedXContentRegistry,
             AzureStorageService storageService) {
-        super(metadata, environment.settings(), Repository.COMPRESS_SETTING.get(metadata.settings()), namedXContentRegistry);
+        super(metadata, environment.settings(), namedXContentRegistry);
         this.chunkSize = Repository.CHUNK_SIZE_SETTING.get(metadata.settings());
-        this.environment = environment;
         this.storageService = storageService;
 
         final String basePath = Strings.trimLeadingCharacter(Repository.BASE_PATH_SETTING.get(metadata.settings()), '/');

plugins/repository-gcs/src/main/java/org/elasticsearch/repositories/gcs/GoogleCloudStorageRepository.java

@@ -25,7 +25,6 @@
 import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.blobstore.BlobPath;
 import org.elasticsearch.common.settings.Setting;
-import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.unit.ByteSizeUnit;
 import org.elasticsearch.common.unit.ByteSizeValue;
 import org.elasticsearch.common.xcontent.NamedXContentRegistry;
@@ -36,7 +35,6 @@
 import java.util.function.Function;
 
 import static org.elasticsearch.common.settings.Setting.Property;
-import static org.elasticsearch.common.settings.Setting.boolSetting;
 import static org.elasticsearch.common.settings.Setting.byteSizeSetting;
 import static org.elasticsearch.common.settings.Setting.simpleString;
 
@@ -53,13 +51,10 @@ class GoogleCloudStorageRepository extends BlobStoreRepository {
             simpleString("bucket", Property.NodeScope, Property.Dynamic);
     static final Setting<String> BASE_PATH =
             simpleString("base_path", Property.NodeScope, Property.Dynamic);
-    static final Setting<Boolean> COMPRESS =
-            boolSetting("compress", false, Property.NodeScope, Property.Dynamic);
     static final Setting<ByteSizeValue> CHUNK_SIZE =
             byteSizeSetting("chunk_size", MAX_CHUNK_SIZE, MIN_CHUNK_SIZE, MAX_CHUNK_SIZE, Property.NodeScope, Property.Dynamic);
     static final Setting<String> CLIENT_NAME = new Setting<>("client", "default", Function.identity());
 
-    private final Settings settings;
     private final GoogleCloudStorageService storageService;
     private final BlobPath basePath;
     private final ByteSizeValue chunkSize;
@@ -69,8 +64,7 @@ class GoogleCloudStorageRepository extends BlobStoreRepository {
     GoogleCloudStorageRepository(RepositoryMetaData metadata, Environment environment,
                                         NamedXContentRegistry namedXContentRegistry,
                                         GoogleCloudStorageService storageService) {
-        super(metadata, environment.settings(), getSetting(COMPRESS, metadata), namedXContentRegistry);
-        this.settings = environment.settings();
+        super(metadata, environment.settings(), namedXContentRegistry);
         this.storageService = storageService;
 
         String basePath = BASE_PATH.get(metadata.settings());

plugins/repository-hdfs/src/main/java/org/elasticsearch/repositories/hdfs/HdfsRepository.java

@@ -68,7 +68,7 @@ public final class HdfsRepository extends BlobStoreRepository {
 
     public HdfsRepository(RepositoryMetaData metadata, Environment environment,
                           NamedXContentRegistry namedXContentRegistry) {
-        super(metadata, environment.settings(), metadata.settings().getAsBoolean("compress", false), namedXContentRegistry);
+        super(metadata, environment.settings(), namedXContentRegistry);
 
         this.environment = environment;
         this.chunkSize = metadata.settings().getAsBytesSize("chunk_size", null);

plugins/repository-s3/src/main/java/org/elasticsearch/repositories/s3/S3Repository.java

@@ -122,12 +122,6 @@ class S3Repository extends BlobStoreRepository {
     static final Setting<ByteSizeValue> CHUNK_SIZE_SETTING = Setting.byteSizeSetting("chunk_size", new ByteSizeValue(1, ByteSizeUnit.GB),
             new ByteSizeValue(5, ByteSizeUnit.MB), new ByteSizeValue(5, ByteSizeUnit.TB));
 
-    /**
-     * When set to true metadata files are stored in compressed format. This setting doesn’t affect index
-     * files that are already compressed by default. Defaults to false.
-     */
-    static final Setting<Boolean> COMPRESS_SETTING = Setting.boolSetting("compress", false);
-
     /**
      * Sets the S3 storage class type for the backup files. Values may be standard, reduced_redundancy,
      * standard_ia. Defaults to standard.
@@ -172,7 +166,7 @@ class S3Repository extends BlobStoreRepository {
                  final Settings settings,
                  final NamedXContentRegistry namedXContentRegistry,
                  final S3Service service) {
-        super(metadata, settings, COMPRESS_SETTING.get(metadata.settings()), namedXContentRegistry);
+        super(metadata, settings, namedXContentRegistry);
         this.service = service;
 
         this.repositoryMetaData = metadata;

server/src/main/java/org/elasticsearch/common/settings/ClusterSettings.java

@@ -199,7 +199,6 @@ public void apply(Settings value, Settings current, Settings previous) {
                     FilterAllocationDecider.CLUSTER_ROUTING_EXCLUDE_GROUP_SETTING,
                     FilterAllocationDecider.CLUSTER_ROUTING_REQUIRE_GROUP_SETTING,
                     FsRepository.REPOSITORIES_CHUNK_SIZE_SETTING,
-                    FsRepository.REPOSITORIES_COMPRESS_SETTING,
                     FsRepository.REPOSITORIES_LOCATION_SETTING,
                     IndicesQueryCache.INDICES_CACHE_QUERY_SIZE_SETTING,
                     IndicesQueryCache.INDICES_CACHE_QUERY_COUNT_SETTING,

server/src/main/java/org/elasticsearch/repositories/blobstore/BlobStoreRepository.java

@@ -56,6 +56,7 @@
 import org.elasticsearch.common.lucene.Lucene;
 import org.elasticsearch.common.lucene.store.InputStreamIndexInput;
 import org.elasticsearch.common.metrics.CounterMetric;
+import org.elasticsearch.common.settings.Setting;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.unit.ByteSizeUnit;
 import org.elasticsearch.common.unit.ByteSizeValue;
@@ -193,6 +194,13 @@ public abstract class BlobStoreRepository extends AbstractLifecycleComponent imp
 
     private static final String DATA_BLOB_PREFIX = "__";
 
+    /**
+     * When set to true metadata files are stored in compressed format. This setting doesn’t affect index
+     * files that are already compressed by default. Changing the setting does not invalidate existing files since reads
+     * do not observe the setting, instead they examine the file to see if it is compressed or not.
+     */
+    public static final Setting<Boolean> COMPRESS_SETTING = Setting.boolSetting("compress", false, Setting.Property.NodeScope);
+
     private final Settings settings;
 
     private final boolean compress;
@@ -225,17 +233,15 @@ public abstract class BlobStoreRepository extends AbstractLifecycleComponent imp
 
     /**
      * Constructs new BlobStoreRepository
-     *
-     * @param metadata       The metadata for this repository including name and settings
+     *  @param metadata       The metadata for this repository including name and settings
      * @param settings Settings for the node this repository object is created on
-     * @param compress true if metadata and snapshot files should be compressed
      */
-    protected BlobStoreRepository(RepositoryMetaData metadata, Settings settings, boolean compress,
+    protected BlobStoreRepository(RepositoryMetaData metadata, Settings settings,
                                   NamedXContentRegistry namedXContentRegistry) {
         this.settings = settings;
-        this.compress = compress;
         this.metadata = metadata;
         this.namedXContentRegistry = namedXContentRegistry;
+        this.compress = COMPRESS_SETTING.get(metadata.settings());
         snapshotRateLimiter = getRateLimiter(metadata.settings(), "max_snapshot_bytes_per_sec", new ByteSizeValue(40, ByteSizeUnit.MB));
         restoreRateLimiter = getRateLimiter(metadata.settings(), "max_restore_bytes_per_sec", new ByteSizeValue(40, ByteSizeUnit.MB));
         readOnly = metadata.settings().getAsBoolean("readonly", false);

server/src/main/java/org/elasticsearch/repositories/fs/FsRepository.java

@@ -61,9 +61,6 @@ public class FsRepository extends BlobStoreRepository {
             new ByteSizeValue(Long.MAX_VALUE), new ByteSizeValue(5), new ByteSizeValue(Long.MAX_VALUE), Property.NodeScope);
     public static final Setting<ByteSizeValue> REPOSITORIES_CHUNK_SIZE_SETTING = Setting.byteSizeSetting("repositories.fs.chunk_size",
         new ByteSizeValue(Long.MAX_VALUE), new ByteSizeValue(5), new ByteSizeValue(Long.MAX_VALUE), Property.NodeScope);
-    public static final Setting<Boolean> COMPRESS_SETTING = Setting.boolSetting("compress", false, Property.NodeScope);
-    public static final Setting<Boolean> REPOSITORIES_COMPRESS_SETTING =
-        Setting.boolSetting("repositories.fs.compress", false, Property.NodeScope, Property.Deprecated);
     private final Environment environment;
 
     private ByteSizeValue chunkSize;
@@ -75,7 +72,7 @@ public class FsRepository extends BlobStoreRepository {
      */
     public FsRepository(RepositoryMetaData metadata, Environment environment,
                         NamedXContentRegistry namedXContentRegistry) {
-        super(metadata, environment.settings(), calculateCompress(metadata, environment), namedXContentRegistry);
+        super(metadata, environment.settings(), namedXContentRegistry);
         this.environment = environment;
         String location = REPOSITORIES_LOCATION_SETTING.get(metadata.settings());
         if (location.isEmpty()) {
@@ -106,11 +103,6 @@ public FsRepository(RepositoryMetaData metadata, Environment environment,
         this.basePath = BlobPath.cleanPath();
     }
 
-    private static boolean calculateCompress(RepositoryMetaData metadata, Environment environment) {
-        return COMPRESS_SETTING.exists(metadata.settings())
-            ? COMPRESS_SETTING.get(metadata.settings()) : REPOSITORIES_COMPRESS_SETTING.get(environment.settings());
-    }
-
     @Override
     protected BlobStore createBlobStore() throws Exception {
         final String location = REPOSITORIES_LOCATION_SETTING.get(metadata.settings());

server/src/test/java/org/elasticsearch/repositories/blobstore/BlobStoreRepositoryTests.java

@@ -22,7 +22,6 @@
 import org.elasticsearch.action.admin.cluster.snapshots.create.CreateSnapshotResponse;
 import org.elasticsearch.action.support.master.AcknowledgedResponse;
 import org.elasticsearch.client.Client;
-import org.elasticsearch.cluster.metadata.RepositoryMetaData;
 import org.elasticsearch.common.UUIDs;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.unit.ByteSizeUnit;
@@ -248,40 +247,28 @@ public void testBadChunksize() throws Exception {
                 .get());
     }
 
-    public void testFsRepositoryCompressDeprecated() {
-        final Path location = ESIntegTestCase.randomRepoPath(node().settings());
-        final Settings settings = Settings.builder().put(node().settings()).put("location", location).build();
-        final RepositoryMetaData metaData = new RepositoryMetaData("test-repo", REPO_TYPE, settings);
-
-        Settings useCompressSettings = Settings.builder()
-            .put(node().getEnvironment().settings())
-            .put(FsRepository.REPOSITORIES_COMPRESS_SETTING.getKey(), true)
-            .build();
-        Environment useCompressEnvironment =
-            new Environment(useCompressSettings, node().getEnvironment().configFile());
-
-        new FsRepository(metaData, useCompressEnvironment, null);
-
-        assertWarnings("[repositories.fs.compress] setting was deprecated in Elasticsearch and will be removed in a future release!" +
-            " See the breaking changes documentation for the next major version.");
-    }
-
     private BlobStoreRepository setupRepo() {
         final Client client = client();
         final Path location = ESIntegTestCase.randomRepoPath(node().settings());
         final String repositoryName = "test-repo";
 
+        Settings.Builder repoSettings = Settings.builder().put(node().settings()).put("location", location);
+        boolean compress = randomBoolean();
+        if (compress) {
+            repoSettings.put(BlobStoreRepository.COMPRESS_SETTING.getKey(), true);
+        }
         AcknowledgedResponse putRepositoryResponse =
             client.admin().cluster().preparePutRepository(repositoryName)
                                     .setType(REPO_TYPE)
-                                    .setSettings(Settings.builder().put(node().settings()).put("location", location))
+                                    .setSettings(repoSettings)
                                     .get();
         assertThat(putRepositoryResponse.isAcknowledged(), equalTo(true));
 
         final RepositoriesService repositoriesService = getInstanceFromNode(RepositoriesService.class);
         final BlobStoreRepository repository =
             (BlobStoreRepository) repositoriesService.repository(repositoryName);
         assertThat("getBlobContainer has to be lazy initialized", repository.getBlobContainer(), nullValue());
+        assertEquals("Compress must be set to", compress, repository.isCompress());
         return repository;
     }