From 1e5d840d17e5dc1a6e8c6b42b11e2a5a6481aa47 Mon Sep 17 00:00:00 2001
From: jingze <daijingze.djz@alibaba-inc.com>
Date: Mon, 9 Feb 2026 17:02:27 +0800
Subject: [PATCH] Update enableDeltaXDS configuration in values.yaml to true
 and add ISTIO_DELTA_XDS environment variable in pod template

Change-Id: I3df3446264894c710da6026f78d3440d6c6392e1
Co-developed-by: Cursor <noreply@cursor.com>
---
 envoy/envoy                  | 2 +-
 helm/core/templates/_pod.tpl | 2 ++
 helm/core/values.yaml        | 4 ++--
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/envoy/envoy b/envoy/envoy
index b88f84a8e..595c062c7 160000
--- a/envoy/envoy
+++ b/envoy/envoy
@@ -1 +1 @@
-Subproject commit b88f84a8e1af49029e1f058b85dac91a6502a3d1
+Subproject commit 595c062c755f90773acf78931e6e91541f39196b
diff --git a/helm/core/templates/_pod.tpl b/helm/core/templates/_pod.tpl
index 419a5af6d..548b633a5 100644
--- a/helm/core/templates/_pod.tpl
+++ b/helm/core/templates/_pod.tpl
@@ -123,6 +123,8 @@ template:
         - name: LITE_METRICS
           value: "on"
         {{- end }}
+        - name: ISTIO_DELTA_XDS
+          value: "{{ .Values.global.enableDeltaXDS }}"
         {{- if include "skywalking.enabled" . }}
         - name: ISTIO_BOOTSTRAP_OVERRIDE
           value: /etc/istio/custom-bootstrap/custom_bootstrap.json
diff --git a/helm/core/values.yaml b/helm/core/values.yaml
index 536ee19d6..2a7561c57 100644
--- a/helm/core/values.yaml
+++ b/helm/core/values.yaml
@@ -9,8 +9,8 @@ global:
   xdsMaxRecvMsgSize: "104857600"
   defaultUpstreamConcurrencyThreshold: 10000
   enableSRDS: true
-  # -- Whether to enable Istio delta xDS. Default is false due to SRDS compatibility.
-  enableDeltaXDS: false
+  # -- Whether to enable Istio delta xDS, default is false.
+  enableDeltaXDS: true
   # -- Whether to enable Redis(redis-stack-server) for Higress, default is false.
   enableRedis: false
   enablePluginServer: false