diff --git a/container-disc/src/main/java/com/yahoo/container/jdisc/SystemInfoProvider.java b/container-disc/src/main/java/com/yahoo/container/jdisc/SystemInfoProvider.java
index d98ea0ffc252..d82984919446 100644
--- a/container-disc/src/main/java/com/yahoo/container/jdisc/SystemInfoProvider.java
+++ b/container-disc/src/main/java/com/yahoo/container/jdisc/SystemInfoProvider.java
@@ -36,7 +36,7 @@ public SystemInfoProvider(ConfigserverConfig csConfig,
                                                          applicationIdConfig.instance()),
                                        new Zone(Environment.valueOf(csConfig.environment()), csConfig.region()),
                                        new Cloud(csConfig.cloud()),
-                                       new Cluster(ciConfig.nodeCount(), ciConfig.nodeIndices()),
+                                       new Cluster(ciConfig.clusterId(), ciConfig.nodeCount(), ciConfig.nodeIndices()),
                                        new Node(qrConfig.nodeIndex()));
     }
 
diff --git a/hosted-zone-api/abi-spec.json b/hosted-zone-api/abi-spec.json
index 0d9a64097593..213f2883da0c 100644
--- a/hosted-zone-api/abi-spec.json
+++ b/hosted-zone-api/abi-spec.json
@@ -41,6 +41,8 @@
     ],
     "methods": [
       "public void <init>(int, java.util.List)",
+      "public void <init>(java.lang.String, int, java.util.List)",
+      "public java.lang.String id()",
       "public int size()",
       "public java.util.List indices()",
       "public boolean equals(java.lang.Object)",
diff --git a/hosted-zone-api/src/main/java/ai/vespa/cloud/Cluster.java b/hosted-zone-api/src/main/java/ai/vespa/cloud/Cluster.java
index 218545383e6e..ce278848f290 100644
--- a/hosted-zone-api/src/main/java/ai/vespa/cloud/Cluster.java
+++ b/hosted-zone-api/src/main/java/ai/vespa/cloud/Cluster.java
@@ -12,15 +12,25 @@
  */
 public class Cluster {
 
+    private final String id;
     private final int size;
     private final List<Integer> indices;
 
+    // TODO: Remove on Vespa 9
+    @Deprecated(forRemoval = true)
     public Cluster(int size, List<Integer> indices) {
-        Objects.requireNonNull(indices, "Indices cannot be null!");
+        this("default", size, indices);
+    }
+
+    public Cluster(String id, int size, List<Integer> indices) {
+        this.id = Objects.requireNonNull(id);
         this.size = size;
-        this.indices = Collections.unmodifiableList(indices);
+        this.indices = List.copyOf(Objects.requireNonNull(indices));
     }
 
+    /** Returns the id of this cluster set in services.xml */
+    public String id() { return id; }
+
     /** Returns the number of nodes in this cluster. */
     public int size() { return size; }
 
@@ -32,15 +42,16 @@ public List<Integer> indices() {
     @Override
     public boolean equals(Object o) {
         if (this == o) return true;
-        if (o == null || getClass() != o.getClass()) return false;
-        Cluster cluster = (Cluster) o;
-        return size == cluster.size &&
-                indices.equals(cluster.indices);
+        if ( ! (o instanceof Cluster other)) return false;
+        if ( ! this.id.equals(other.id)) return false;
+        if ( this.size != other.size) return false;
+        if ( ! this.indices.equals(other.indices)) return false;
+        return true;
     }
 
     @Override
     public int hashCode() {
-        return Objects.hash(size, indices);
+        return Objects.hash(id, size, indices);
     }
 
 }
diff --git a/hosted-zone-api/src/test/java/ai/vespa/cloud/SystemInfoTest.java b/hosted-zone-api/src/test/java/ai/vespa/cloud/SystemInfoTest.java
index 2bae9f0c9e28..d97bba51c716 100644
--- a/hosted-zone-api/src/test/java/ai/vespa/cloud/SystemInfoTest.java
+++ b/hosted-zone-api/src/test/java/ai/vespa/cloud/SystemInfoTest.java
@@ -18,7 +18,7 @@ void testSystemInfo() {
         ApplicationId application = new ApplicationId("tenant1", "application1", "instance1");
         Zone zone = new Zone(Environment.dev, "us-west-1");
         Cloud cloud = new Cloud("aws");
-        Cluster cluster = new Cluster(1, List.of());
+        Cluster cluster = new Cluster("clusterId", 1, List.of());
         Node node = new Node(0);
 
         SystemInfo info = new SystemInfo(application, zone, cloud, cluster, node);
@@ -59,9 +59,11 @@ void testZone() {
 
     @Test
     void testCluster() {
+        String id = "clusterId";
         int size = 1;
         var indices = List.of(1);
-        Cluster cluster = new Cluster(size, indices);
+        Cluster cluster = new Cluster("clusterId", size, indices);
+        assertEquals(id, cluster.id());
         assertEquals(size, cluster.size());
         assertEquals(indices, cluster.indices());
     }