add max inflight flag

Signed-off-by: pigletfly <wangbing.adam@gmail.com>

charts/templates/karmada_apiserver.yaml

@@ -70,6 +70,8 @@ spec:
             - --requestheader-username-headers=X-Remote-User
             - --tls-cert-file=/etc/kubernetes/pki/karmada.crt
             - --tls-private-key-file=/etc/kubernetes/pki/karmada.key
+            - --max-requests-inflight={{ .Values.apiServer.maxRequestsInflight }}
+            - --max-mutating-requests-inflight={{ .Values.apiServer.maxMutatingRequestsInflight }}
           ports:
             - name: http
               containerPort: 5443

charts/values.yaml

@@ -244,6 +244,8 @@ apiServer:
   ## will take effect when 'apiServer.serviceType' is 'NodePort'.
   ## If no port is specified, the nodePort will be automatically assigned.
   nodePort: 0
+  maxRequestsInflight: 1500
+  maxMutatingRequestsInflight: 500
 
 ## karmada aggregated apiserver config
 aggregatedApiServer: