Remove Container Exists Check in 6.8 (#45440)

* We already removed this check in `7.x` and this is breaking tests in 6.8 because the check requires additional permissions that we don't give in CI and don't want to giveon Cloud -> I think it's safe to remove it here as well as it really serves no purpose
* Closes #44712

Author: original-brownbear

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

@@ -94,10 +94,6 @@ public void delete(BlobPath path) throws IOException {
     public void close() {
     }
 
-    public boolean containerExist() throws URISyntaxException, StorageException {
-        return service.doesContainerExist(clientName, container);
-    }
-
     public boolean blobExists(String blob) throws URISyntaxException, StorageException {
         return service.blobExists(clientName, container, blob);
     }

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

@@ -25,7 +25,6 @@
 
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
-import org.elasticsearch.cluster.metadata.MetaData;
 import org.elasticsearch.cluster.metadata.RepositoryMetaData;
 import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.blobstore.BlobPath;
@@ -35,13 +34,9 @@
 import org.elasticsearch.common.unit.ByteSizeValue;
 import org.elasticsearch.common.xcontent.NamedXContentRegistry;
 import org.elasticsearch.env.Environment;
-import org.elasticsearch.repositories.IndexId;
 import org.elasticsearch.repositories.blobstore.BlobStoreRepository;
-import org.elasticsearch.snapshots.SnapshotCreationException;
-import org.elasticsearch.snapshots.SnapshotId;
 
 import java.net.URISyntaxException;
-import java.util.List;
 import java.util.Locale;
 import java.util.function.Function;
 
@@ -157,20 +152,6 @@ protected ByteSizeValue chunkSize() {
         return chunkSize;
     }
 
-    @Override
-    public void initializeSnapshot(SnapshotId snapshotId, List<IndexId> indices, MetaData clusterMetadata) {
-        try {
-            final AzureBlobStore blobStore = (AzureBlobStore) blobStore();
-            if (blobStore.containerExist() == false) {
-                throw new IllegalArgumentException("The bucket [" + blobStore + "] does not exist. Please create it before "
-                        + " creating an azure snapshot repository backed by it.");
-            }
-        } catch (URISyntaxException | StorageException e) {
-            throw new SnapshotCreationException(metadata.name(), snapshotId, e);
-        }
-        super.initializeSnapshot(snapshotId, indices, clusterMetadata);
-    }
-
     @Override
     public boolean isReadOnly() {
         return readonly;

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

@@ -137,12 +137,6 @@ public Map<String, AzureStorageSettings> refreshAndClearCache(Map<String, AzureS
         return prevSettings;
     }
 
-    public boolean doesContainerExist(String account, String container) throws URISyntaxException, StorageException {
-        final Tuple<CloudBlobClient, Supplier<OperationContext>> client = client(account);
-        final CloudBlobContainer blobContainer = client.v1().getContainerReference(container);
-        return SocketAccess.doPrivilegedException(() -> blobContainer.exists(null, null, client.v2().get()));
-    }
-
     public void deleteFiles(String account, String container, String path) throws URISyntaxException, StorageException {
         final Tuple<CloudBlobClient, Supplier<OperationContext>> client = client(account);
         // container name must be lower case.

plugins/repository-azure/src/test/java/org/elasticsearch/repositories/azure/AzureStorageServiceMock.java

@@ -56,11 +56,6 @@ public AzureStorageServiceMock() {
         super(Settings.EMPTY);
     }
 
-    @Override
-    public boolean doesContainerExist(String account, String container) {
-        return true;
-    }
-
     @Override
     public void deleteFiles(String account, String container, String path) throws URISyntaxException, StorageException {
         final Map<String, BlobMetaData> blobs = listBlobsByPrefix(account, container, path, null);