Update Helm release external-dns to v1.21.1

[renovate]

This PR contains the following updates:

Package	Update	Change
external-dns	minor	1.20.0 → 1.21.1

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Release Notes

kubernetes-sigs/external-dns (external-dns)

v1.21.1

Added

• Add value .sourceNamespace to watch a namespace which is different from the one that external-dns is installed into when .namespaced is true. (#​6297) @​jplitza
• Add option to enable Gateway API ListenerSet support. (#​6381) @​speer
• Add support for bool in extraArgs. (#​6179) @​farodin91
• Add value .namespaceOverride to render chart resources into a namespace different from the release namespace, for subchart installs that want their own namespace. (#​6389) @​alliasgher

Changed

• Update ExternalDNS OCI image version to v0.21.0. (#​6354) @​vflaux

Fixed

• Avoid creating cluster-scoped RBAC for Gateway API sources when running namespaced with gatewayNamespace set. Namespace listing permissions are now only added when gatewayNamespace is unset. (#​5843) @​TobyTheHutt
• Ensure container arguments are passed in as strings (#​6264) @​KhooHaoYit
• Ensure container arguments are passed in as strings when extraArgs is a map (#​6284) @​vflaux

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🔍 Helm Release Diff

cluster/core/network-system/dns/external-dns/helmrelease.yaml — ⬆️ Updated 1.20.0 → 1.21.1

Click to expand diff

--- /dev/fd/63	2026-05-14 16:44:25.136118281 +0000
+++ /dev/fd/62	2026-05-14 16:44:25.136118281 +0000
@@ -8,8 +8,8 @@
     app.kubernetes.io/instance: external-dns
     app.kubernetes.io/managed-by: Helm
     app.kubernetes.io/name: external-dns
-    app.kubernetes.io/version: "0.20.0"
-    helm.sh/chart: external-dns-1.20.0
+    app.kubernetes.io/version: "0.21.0"
+    helm.sh/chart: external-dns-1.21.1
   name: external-dns
   namespace: network-system
 ---
@@ -21,8 +21,8 @@
     app.kubernetes.io/instance: external-dns
     app.kubernetes.io/managed-by: Helm
     app.kubernetes.io/name: external-dns
-    app.kubernetes.io/version: "0.20.0"
-    helm.sh/chart: external-dns-1.20.0
+    app.kubernetes.io/version: "0.21.0"
+    helm.sh/chart: external-dns-1.21.1
   name: external-dns
 rules:
   - apiGroups: [""]
@@ -49,8 +49,8 @@
     app.kubernetes.io/instance: external-dns
     app.kubernetes.io/managed-by: Helm
     app.kubernetes.io/name: external-dns
-    app.kubernetes.io/version: "0.20.0"
-    helm.sh/chart: external-dns-1.20.0
+    app.kubernetes.io/version: "0.21.0"
+    helm.sh/chart: external-dns-1.21.1
   name: external-dns-viewer
 roleRef:
   apiGroup: rbac.authorization.k8s.io
@@ -69,8 +69,8 @@
     app.kubernetes.io/instance: external-dns
     app.kubernetes.io/managed-by: Helm
     app.kubernetes.io/name: external-dns
-    app.kubernetes.io/version: "0.20.0"
-    helm.sh/chart: external-dns-1.20.0
+    app.kubernetes.io/version: "0.21.0"
+    helm.sh/chart: external-dns-1.21.1
   name: external-dns
   namespace: network-system
 spec:
@@ -96,8 +96,8 @@
     app.kubernetes.io/instance: external-dns
     app.kubernetes.io/managed-by: Helm
     app.kubernetes.io/name: external-dns
-    app.kubernetes.io/version: "0.20.0"
-    helm.sh/chart: external-dns-1.20.0
+    app.kubernetes.io/version: "0.21.0"
+    helm.sh/chart: external-dns-1.21.1
   name: external-dns
   namespace: network-system
 spec:
@@ -125,7 +125,7 @@
             - --policy=upsert-only
             - --registry=txt
             - --provider=webhook
-          image: registry.k8s.io/external-dns/external-dns:v0.20.0
+          image: registry.k8s.io/external-dns/external-dns:v0.21.0
           imagePullPolicy: IfNotPresent
           livenessProbe:
             failureThreshold: 2