From 80462ecdad63b851d5cd00ec623f55e64cd26728 Mon Sep 17 00:00:00 2001
From: Manuel Alejandro de Brito Fontes <aledbf@gmail.com>
Date: Mon, 12 Feb 2018 15:14:11 -0800
Subject: [PATCH] Remove initContainer from default deployment (#2077)

---
 deploy/with-rbac.yaml                         | 10 ----------
 deploy/without-rbac.yaml                      | 10 ----------
 docs/examples/customization/sysctl/README.md  |  9 +++++++++
 docs/examples/customization/sysctl/patch.json | 16 ++++++++++++++++
 4 files changed, 25 insertions(+), 20 deletions(-)
 create mode 100644 docs/examples/customization/sysctl/README.md
 create mode 100644 docs/examples/customization/sysctl/patch.json

diff --git a/deploy/with-rbac.yaml b/deploy/with-rbac.yaml
index a70a7fa63..00611d01a 100644
--- a/deploy/with-rbac.yaml
+++ b/deploy/with-rbac.yaml
@@ -17,16 +17,6 @@ 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:0.10.2
diff --git a/deploy/without-rbac.yaml b/deploy/without-rbac.yaml
index 1de84195b..2e91708ef 100644
--- a/deploy/without-rbac.yaml
+++ b/deploy/without-rbac.yaml
@@ -16,16 +16,6 @@ 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:0.10.2
diff --git a/docs/examples/customization/sysctl/README.md b/docs/examples/customization/sysctl/README.md
new file mode 100644
index 000000000..909e12989
--- /dev/null
+++ b/docs/examples/customization/sysctl/README.md
@@ -0,0 +1,9 @@
+# Sysctl tuning
+
+This example aims to demonstrate the use of an Init Container to adjust sysctl default values
+using `kubectl patch`
+
+```console
+kubectl patch deployment -n ingress-nginx nginx-ingress-controller --patch="$(cat patch.json)"
+```
+
diff --git a/docs/examples/customization/sysctl/patch.json b/docs/examples/customization/sysctl/patch.json
new file mode 100644
index 000000000..56482f511
--- /dev/null
+++ b/docs/examples/customization/sysctl/patch.json
@@ -0,0 +1,16 @@
+{
+	"spec": {
+		"template": {
+			"spec": {
+				"initContainers": [{
+					"name": "sysctl",
+					"image": "alpine:3.6",
+					"securityContext": {
+						"privileged": true
+					},
+					"command": ["sh", "-c", "sysctl -w net.core.somaxconn=32768; sysctl -w net.ipv4.ip_local_port_range=1024 65535"]
+				}]
+			}
+		}
+	}
+}
\ No newline at end of file