1 files changed, 16 insertions, 0 deletions
diff --git a/config-provisioning/src/main/java/com/yahoo/config/provision/zone/ZoneList.java b/config-provisioning/src/main/java/com/yahoo/config/provision/zone/ZoneList.java
index c6ace00b90c..0a6bdd3b6b8 100644
--- a/config-provisioning/src/main/java/com/yahoo/config/provision/zone/ZoneList.java
+++ b/config-provisioning/src/main/java/com/yahoo/config/provision/zone/ZoneList.java
@@ -1,10 +1,12 @@
 // Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
 package com.yahoo.config.provision.zone;
 
+import com.yahoo.config.provision.CloudName;
 import com.yahoo.config.provision.Environment;
 import com.yahoo.config.provision.RegionName;
 
 import java.util.List;
+import java.util.Optional;
 import java.util.stream.Collectors;
 
 /**
@@ -27,9 +29,23 @@ public interface ZoneList extends ZoneFilter {
     /** Zones in one of the given regions. */
     ZoneList in(RegionName... regions);
 
+    /** Zones in one of the given clouds. */
+    ZoneList in(CloudName... clouds);
+
     /** Only the given zones — combine with not() for best effect! */
     ZoneList among(ZoneId... zones);
 
+    /** Zones where hosts must be reprovisioned to upgrade their OS */
+    ZoneList reprovisionToUpgradeOs();
+
+    /** Zones where traffic is routed using given method */
+    ZoneList routingMethod(RoutingMethod method);
+
+    /** Returns the zone with the given id, if this exists. */
+    default Optional<? extends ZoneApi> get(ZoneId id) {
+        return among(id).zones().stream().findFirst();
+    }
+
     /** Returns the ZoneApi of all zones in this list. */
     List<? extends ZoneApi> zones();