diff --git a/changelog/unreleased/pr-24035.toml b/changelog/unreleased/pr-24035.toml
new file mode 100644
index 0000000000..fc67c55620
--- /dev/null
+++ b/changelog/unreleased/pr-24035.toml
@@ -0,0 +1,5 @@
+type = "a"
+message = "Create metrics supplier for shards."
+
+pulls = ["24035"]
+issues = ["Graylog2/graylog-plugin-enterprise#12221", "Graylog2/graylog-plugin-enterprise#12223"]
diff --git a/graylog2-server/src/main/java/org/graylog2/telemetry/TelemetryModule.java b/graylog2-server/src/main/java/org/graylog2/telemetry/TelemetryModule.java
index 7e5da3aab4..387a48c180 100644
--- a/graylog2-server/src/main/java/org/graylog2/telemetry/TelemetryModule.java
+++ b/graylog2-server/src/main/java/org/graylog2/telemetry/TelemetryModule.java
@@ -21,6 +21,7 @@ import org.graylog2.plugin.PluginModule;
 import org.graylog2.telemetry.scheduler.TelemetrySubmissionPeriodical;
 import org.graylog2.telemetry.suppliers.InputsMetricsSupplier;
 import org.graylog2.telemetry.suppliers.OutputsMetricsSupplier;
+import org.graylog2.telemetry.suppliers.ShardsMetricsSupplier;
 
 public class TelemetryModule extends PluginModule {
     @Override
@@ -33,5 +34,6 @@ public class TelemetryModule extends PluginModule {
 
         addTelemetryMetricProvider("Inputs Metrics", InputsMetricsSupplier.class);
         addTelemetryMetricProvider("Outputs Metrics", OutputsMetricsSupplier.class);
+        addTelemetryMetricProvider("Shards Metrics", ShardsMetricsSupplier.class);
     }
 }
diff --git a/graylog2-server/src/main/java/org/graylog2/telemetry/suppliers/ShardsMetricsSupplier.java b/graylog2-server/src/main/java/org/graylog2/telemetry/suppliers/ShardsMetricsSupplier.java
new file mode 100644
index 0000000000..978c5ae49e
--- /dev/null
+++ b/graylog2-server/src/main/java/org/graylog2/telemetry/suppliers/ShardsMetricsSupplier.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2020 Graylog, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the Server Side Public License, version 1,
+ * as published by MongoDB, Inc.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * Server Side Public License for more details.
+ *
+ * You should have received a copy of the Server Side Public License
+ * along with this program. If not, see
+ * <http://www.mongodb.com/licensing/server-side-public-license>.
+ */
+package org.graylog2.telemetry.suppliers;
+
+import jakarta.inject.Inject;
+import org.graylog2.configuration.ElasticsearchConfiguration;
+import org.graylog2.indexer.cluster.Cluster;
+import org.graylog2.rest.models.system.indexer.responses.ClusterHealth;
+import org.graylog2.telemetry.scheduler.TelemetryEvent;
+import org.graylog2.telemetry.scheduler.TelemetryMetricSupplier;
+
+import java.util.Map;
+import java.util.Optional;
+
+public class ShardsMetricsSupplier implements TelemetryMetricSupplier {
+    private final ElasticsearchConfiguration elasticsearchConfiguration;
+    private final Cluster cluster;
+
+    @Inject
+    public ShardsMetricsSupplier(ElasticsearchConfiguration elasticsearchConfiguration, Cluster cluster) {
+        this.elasticsearchConfiguration = elasticsearchConfiguration;
+        this.cluster = cluster;
+    }
+
+    @Override
+    public Optional<TelemetryEvent> get() {
+        Optional<ClusterHealth.ShardStatus> shardStatus = cluster.clusterHealthStats().map(ClusterHealth::shards);
+
+        Map<String, Object> metrics = Map.of(
+                "shard_min_size", elasticsearchConfiguration.getTimeSizeOptimizingRotationMinShardSize().getQuantity(),
+                "shard_max_size", elasticsearchConfiguration.getTimeSizeOptimizingRotationMaxShardSize().getQuantity(),
+                "shards_active", shardStatus.map(ClusterHealth.ShardStatus::active).orElse(0),
+                "shards_initializing", shardStatus.map(ClusterHealth.ShardStatus::initializing).orElse(0),
+                "shards_relocating", shardStatus.map(ClusterHealth.ShardStatus::relocating).orElse(0),
+                "shards_unassigned", shardStatus.map(ClusterHealth.ShardStatus::unassigned).orElse(0)
+        );
+
+        return Optional.of(TelemetryEvent.of(metrics));
+    }
+}
diff --git a/graylog2-server/src/test/java/org/graylog2/telemetry/suppliers/ShardsMetricsSupplierTest.java b/graylog2-server/src/test/java/org/graylog2/telemetry/suppliers/ShardsMetricsSupplierTest.java
new file mode 100644
index 0000000000..678a8c2ba2
--- /dev/null
+++ b/graylog2-server/src/test/java/org/graylog2/telemetry/suppliers/ShardsMetricsSupplierTest.java
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2020 Graylog, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the Server Side Public License, version 1,
+ * as published by MongoDB, Inc.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * Server Side Public License for more details.
+ *
+ * You should have received a copy of the Server Side Public License
+ * along with this program. If not, see
+ * <http://www.mongodb.com/licensing/server-side-public-license>.
+ */
+package org.graylog2.telemetry.suppliers;
+
+import com.github.joschi.jadconfig.util.Size;
+import org.graylog2.configuration.ElasticsearchConfiguration;
+import org.graylog2.indexer.cluster.Cluster;
+import org.graylog2.rest.models.system.indexer.responses.ClusterHealth;
+import org.graylog2.telemetry.scheduler.TelemetryEvent;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import java.util.Map;
+import java.util.Optional;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.when;
+
+@ExtendWith(MockitoExtension.class)
+public class ShardsMetricsSupplierTest {
+    @Mock
+    private ElasticsearchConfiguration elasticsearchConfiguration;
+
+    @Mock
+    private Cluster cluster;
+
+    @InjectMocks
+    private ShardsMetricsSupplier shardsMetricsSupplier;
+
+    @Test
+    public void shouldReturnShardMetrics() {
+        Size minSize = Size.gigabytes(29L);
+        Size maxSize = Size.gigabytes(34L);
+        ClusterHealth.ShardStatus shardStatus = ClusterHealth.ShardStatus.create(5, 4, 2, 1);
+
+        when(elasticsearchConfiguration.getTimeSizeOptimizingRotationMinShardSize()).thenReturn(minSize);
+        when(elasticsearchConfiguration.getTimeSizeOptimizingRotationMaxShardSize()).thenReturn(maxSize);
+        when(cluster.clusterHealthStats()).thenReturn(Optional.of(
+                ClusterHealth.create("yellow", shardStatus)
+        ));
+
+        Optional<TelemetryEvent> event = shardsMetricsSupplier.get();
+
+        assertThat(event).isPresent();
+        assertThat(event.get().metrics()).isEqualTo(Map.<String, Object>of(
+                "shard_min_size", minSize.getQuantity(),
+                "shard_max_size", maxSize.getQuantity(),
+                "shards_active", shardStatus.active(),
+                "shards_initializing", shardStatus.initializing(),
+                "shards_relocating", shardStatus.relocating(),
+                "shards_unassigned", shardStatus.unassigned()
+        ));
+    }
+}