Adding litmus installation with ingress (#32)

* Adding litmus installation with ingress

Signed-off-by: Raj Das <mail.rajdas@gmail.com>

website/docs/litmus-installation-with-ingress.md

@@ -0,0 +1,122 @@
+---
+id: litmus-with-ingress
+title: Install LitmusPortal with Ingress
+sidebar_label: Litmus with Ingress
+---
+
+---
+### Install LitmusPortal with Ingress
+
+With Litmus-2.0.0-Beta3, LitmusPortal can be installed with ingress.
+In the following doc, we will use the Nginx ingress controller for ingress setup. 
+
+
+1. Install LitmusPortal in ClusterMode
+```bash
+kubectl apply -f https://litmuschaos.github.io/litmus/2.0.0-Beta/litmus-2.0.0-Beta.yaml
+```
+
+2. By default, the service type is NodePort. We have to patch it to ClusterIP
+
+```bash
+kubectl patch svc litmusportal-frontend -n litmus -p '{"spec": {"type": "ClusterIP"}}'
+kubectl patch svc litmusportal-server -n litmus -p '{"spec": {"type": "ClusterIP"}}'
+```
+
+3. Install Nginx Ingress Controller
+```bash
+kubectl create ns nginx
+helm repo add nginx-stable https://helm.nginx.com/stable
+helm install nginx-ingress nginx-stable/nginx-ingress -n nginx
+```
+
+#### With HTTP
+
+4. Sample litmus ingress manifest With HTTP
+```yaml
+apiVersion: extensions/v1beta1
+kind: Ingress
+metadata:
+  annotations:
+    kubernetes.io/ingress.class: nginx
+    nginx.ingress.kubernetes.io/rewrite-target: /$1
+  name: litmus-ingress
+spec:
+  rules:
+    - http:
+        paths:
+          - backend:
+              serviceName: litmusportal-frontend-service
+              servicePort: 9091
+            path: /(.*)
+            pathType: ImplementationSpecific
+          - backend:
+              serviceName: litmusportal-server-service
+              servicePort: 9002
+            path: /backend/(.*)
+            pathType: ImplementationSpecific
+```
+
+
+#### With HTTPS
+
+5. Install CertManager
+```bash
+kubectl create namespace cert-manager
+helm repo add jetstack https://charts.jetstack.io
+helm install cert-manager jetstack/cert-manager --namespace cert-manager --create-namespace --version v1.3.0 --set installCRDs=true
+```
+
+6. Install LetsEncrypt Cluster Issuer
+
+```yaml
+apiVersion: cert-manager.io/v1alpha2
+kind: ClusterIssuer
+metadata:
+   name: letsencrypt
+spec:
+  acme:
+    server: https://acme-v02.api.letsencrypt.org/directory
+    email: "your@mail.com"
+    privateKeySecretRef:
+      name: letsencrypt
+    solvers:
+    - http01:
+     	ingress:
+        class: nginx
+```
+
+7. Sample Litmus Portal Ingress Manifest with HTTPS
+
+```yaml
+apiVersion: extensions/v1beta1
+kind: Ingress
+metadata:
+  annotations:
+    cert-manager.io/cluster-issuer: letsencrypt
+    kubernetes.io/ingress.class: nginx
+    nginx.ingress.kubernetes.io/rewrite-target: /$1
+  labels:
+    component: litmusportal-frontend
+  name: litmusportal-ingress
+  namespace: litmus
+spec:
+  rules:
+  - host: "<HOST-NAME>"
+    http:
+      paths:
+      - backend:
+          serviceName: litmusportal-frontend-service
+          servicePort: 9091
+        path: /(.*)
+        pathType: ImplementationSpecific
+      - backend:
+          serviceName: litmusportal-server-service
+          servicePort: 9002
+        path: /backend/(.*)
+        pathType: ImplementationSpecific
+  tls:
+  - hosts:
+    - "<HOST-NAME>"
+    secretName: litmuspreview-tls-secret
+```

website/sidebars.js

@@ -8,7 +8,7 @@ module.exports = {
     "Getting Started": [
       "getstarted",
       {
-	      "Installation" : [ "litmus-install", "agent-install" ],
+	      "Installation" : [ "litmus-install", "agent-install", "litmus-with-ingress"],
       },
       "create-workflow",
       "observe-workflow",