Increase max mutating inflight requests in large clusters

cluster/gce/gci/configure-helper.sh

@@ -775,7 +775,7 @@ function start-kube-apiserver {
   if [[ -n "${NUM_NODES:-}" ]]; then
     # If the cluster is large, increase max-requests-inflight limit in apiserver.
     if [[ "${NUM_NODES}" -ge 1000 ]]; then
-      params+=" --max-requests-inflight=1500"
+      params+=" --max-requests-inflight=1500 --max-mutating-requests-inflight=500"
     fi
     # Set amount of memory available for apiserver based on number of nodes.
     # TODO: Once we start setting proper requests and limits for apiserver

cluster/gce/trusty/configure-helper.sh

@@ -589,7 +589,7 @@ start_kube_apiserver() {
   if [ -n "${NUM_NODES:-}" ]; then
     # If the cluster is large, increase max-requests-inflight limit in apiserver.
     if [[ "${NUM_NODES}" -ge 1000 ]]; then
-      params+=" --max-requests-inflight=1500"
+      params+=" --max-requests-inflight=1500 --max-mutating-requests-inflight=500"
     fi
     # Set amount of memory available for apiserver based on number of nodes.
     # TODO: Once we start setting proper requests and limits for apiserver

cluster/saltbase/salt/kube-apiserver/kube-apiserver.manifest

@@ -66,7 +66,7 @@
 {% if pillar['num_nodes'] is defined -%}
   # If the cluster is large, increase max-requests-inflight limit in apiserver.
   {% if pillar['num_nodes']|int >= 1000 -%}
-    {% set max_requests_inflight = "--max-requests-inflight=1500" -%}
+    {% set max_requests_inflight = "--max-requests-inflight=1500 --max-mutating-requests-inflight=500" -%}
   {% endif -%}
   # Set amount of memory available for apiserver based on number of nodes.
   # TODO: Once we start setting proper requests and limits for apiserver