Add HTTP/2 ping options to DestinationRule

networking/v1alpha3/destination_rule.proto

@@ -695,6 +695,26 @@ message ConnectionPoolSettings {
     // The maximum number of concurrent streams allowed for a peer on one HTTP/2 connection.
     // Defaults to 2^31-1.
     int32 max_concurrent_streams = 8;
+
+    // Settings for HTTP/2 protocol options.
+    message Http2ProtocolOptions {
+      // Settings for HTTP/2 PING frames.
+      message ConnectionKeepalive {
+        // Send HTTP/2 PING frames at this interval. Required when
+        // `connectionKeepalive` is set.
+        google.protobuf.Duration interval = 1;
+
+        // How long to wait for a response to an HTTP/2 PING frame before
+        // closing the connection. Required when `connectionKeepalive` is set.
+        google.protobuf.Duration timeout = 2;
+      }
+
+      // Configure HTTP/2 PING frames for upstream connections.
+      ConnectionKeepalive connection_keepalive = 1;
+    }
+
+    // HTTP/2 protocol options for upstream connections.
+    Http2ProtocolOptions http2_protocol_options = 9;
   }
 
   // Settings common to both HTTP and TCP upstream connections.

tests/testdata/destinationrule-valid.yaml

@@ -32,4 +32,18 @@ spec:
       warmup:
         duration: 300s
         minimumPercent: 5.0
-        aggression: 5.0
+        aggression: 5.0
+---
+apiVersion: networking.istio.io/v1
+kind: DestinationRule
+metadata:
+  name: bookinfo-ratings-http2-ping
+spec:
+  host: ratings.prod.svc.cluster.local
+  trafficPolicy:
+    connectionPool:
+      http:
+        http2ProtocolOptions:
+          connectionKeepalive:
+            interval: 15s
+            timeout: 5s