Adjust sysctl values to improve nginx performance

deploy/with-rbac.yaml

@@ -17,6 +17,16 @@ spec:
         prometheus.io/scrape: 'true'
     spec:
       serviceAccountName: nginx-ingress-serviceaccount
+      initContainers:
+      - command:
+        - sh
+        - -c
+        - sysctl -w net.core.somaxconn=32768; sysctl -w net.ipv4.ip_local_port_range="1024 65535"
+        image: alpine:3.6
+        imagePullPolicy: IfNotPresent
+        name: sysctl
+        securityContext:
+          privileged: true
       containers:
         - name: nginx-ingress-controller
           image: quay.io/kubernetes-ingress-controller/nginx-ingress-controller:0.10.0

deploy/without-rbac.yaml

@@ -16,6 +16,16 @@ spec:
         prometheus.io/port: '10254'
         prometheus.io/scrape: 'true' 
     spec:
+      initContainers:
+      - command:
+        - sh
+        - -c
+        - sysctl -w net.core.somaxconn=32768; sysctl -w net.ipv4.ip_local_port_range="1024 65535"
+        image: alpine:3.6
+        imagePullPolicy: IfNotPresent
+        name: sysctl
+        securityContext:
+          privileged: true
       containers:
         - name: nginx-ingress-controller
           image: quay.io/kubernetes-ingress-controller/nginx-ingress-controller:0.10.0