Release 2.2.0 (#3457)

Co-authored-by: EndlessSeeker <153817598+EndlessSeeker@users.noreply.github.com>
Co-authored-by: jingze <daijingze.djz@alibaba-inc.com>

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

helm/core/templates/controller-clusterrole.yaml

@@ -144,3 +144,7 @@ rules:
   - apiGroups: [""]
     verbs: [ "get", "watch", "list", "update", "patch", "create", "delete" ]
     resources: [ "serviceaccounts"]
+  # istio leader election need
+  - apiGroups: ["coordination.k8s.io"]
+    resources: ["leases"]
+    verbs: ["get", "update", "patch", "create"]

helm/core/templates/controller-deployment.yaml

@@ -173,6 +173,8 @@ spec:
             value: "{{ .Values.global.xdsMaxRecvMsgSize }}"
           - name: ENBALE_SCOPED_RDS
             value: "{{ .Values.global.enableSRDS }}"
+          - name: ISTIO_DELTA_XDS
+            value: "{{ .Values.global.enableDeltaXDS }}"
           - name: ON_DEMAND_RDS
             value: "{{ .Values.global.onDemandRDS }}"
           - name: HOST_RDS_MERGE_SUBSET