install nginx ingress controller AKS

Question

Hi
What is use of NGIX Ingress Controller ?
How do I install NGIX Controller
I have yaml file given by vendor

************************* INGRESS CONFIGURATION **************************

MANDATORY in cloud deployments

ingress:

enabled: true - To enable ingress configuration

enabled: true
annotations:
nginx.ingress.kubernetes.io/affinity: "cookie"
nginx.ingress.kubernetes.io/session-cookie-name: "route"
nginx.ingress.kubernetes.io/session-cookie-expires: "86400"
nginx.ingress.kubernetes.io/session-cookie-max-age: "86400"
# kubernetes.io/ingress.class: nginx
# kubernetes.io/tls-acme: "true"

ac:

hosts:

# host: <dns name>

- host: lab-ac.med.umich.edu

# Enables Backend SSL between Ingress Controller and AC

https: true

paths:

# /path: AC service port to redirect traffic

/: 2443

idp:
hosts:
# host: <dns name>

• host: lab-weblogin.med.umich.edu
  # Enables Backend SSL between Ingress Controller and IDP
  https: true
  # /path: IDP service port to redirect traffic
  paths:
  /nidp: 8443
  ag:
  hosts:
  # host: <dns name>
• host: www.cloudag.com
  # Enables Backend SSL between Ingress Controller and AG
  https: true
  # /path: AG service port to redirect traffic
  paths:
  /: 443
• host: dbmh.cloudag.com
  # Enables Backend SSL between Ingress Controller and AG
  https: false
  # /path: AG service port to redirect traffic
  paths:
  /proxy1: 80

TLS configuration for all hosts in AC, IDP and AG

tls:
#- secretName: cloudag
# hosts:
# - www.cloudag.com
#- secretName: cloudidp
# hosts:

• lab-weblogin.med.umich.edu

Let us know Do i need to make change in yaml file.

Answer 1

Hello @Shrikant Bhagwat ,
I think you have to start with basics of "Ingress" before you jump onto inginx controller.

Check out the below article which starts with "Ingress" -> "IngressController" -> "NginxIngressController"
https://github.com/nginxinc/kubernetes-ingress

Then see how NGINX Ingress Controller works behind the scenes:
https://kubernetes.github.io/ingress-nginx/how-it-works/

Once you are done with above basics , use the below document to deploy a sample POD and how to access it via NGINX Ingress controller

https://learn.microsoft.com/en-us/azure/aks/ingress-basic

Deploying NGINX Ingress Controller with example:

https://matthewpalmer.net/kubernetes-app-developer/articles/kubernetes-ingress-guide-nginx-example.html

(With above 2 running examples , I think all your above queries will be answered)
(You just need to configure/Customize the above mentioned YAML files based upon your client provided values)

Let us know if you need additional help on this .

Answer 2

Thanks for Documentation

Following are my nodes

PS C:\WINDOWS\system32> kubectl get nodes -o wide
NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME
aks-agentpool-20294322-vmss000000 Ready agent 2d11h v1.20.7 10.240.0.4 <none> Ubuntu 18.04.5 LTS 5.4.0-1051-azure containerd://1.4.4+azure
aks-agentpool-20294322-vmss000001 Ready agent 2d11h v1.20.7 10.240.0.5 <none> Ubuntu 18.04.5 LTS 5.4.0-1051-azure containerd://1.4.4+azure

Are these IP Address Private IP Address each node ?
Do they have Cluster IP ?
Are these separate standalone nodes or cluster with 2 nodes ?

I did setup Ingress Controller based on documentation

PS C:\WINDOWS\system32> kubectl --namespace default get services -o wide -w nam-ingress-ingress-nginx-controller
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
nam-ingress-ingress-nginx-controller LoadBalancer 10.0.254.117 52.147.218.30 80:30363/TCP,443:31634/TCP 24h app.kubernetes.io/component=controller,app.kubernetes.io/instance=nam-ingress,app.kubernetes.io/name=ingress-nginx

PS C:\WINDOWS\system32> kubectl get pods,svc
NAME READY STATUS RESTARTS AGE
pod/nam-ingress-ingress-nginx-controller-65d74469d9-j9r9w 1/1 Running 0 25h
pod/nginx 1/1 Running 0 25h
pod/node-debugger-aks-agentpool-20294322-vmss000000-g8xt9 0/1 Completed 0 5h2m

NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/kubernetes ClusterIP 10.0.0.1 <none> 443/TCP 2d16h
service/nam-ingress-ingress-nginx-controller LoadBalancer 10.0.254.117 52.147.218.30 80:30363/TCP,443:31634/TCP 25h
service/nam-ingress-ingress-nginx-controller-admission ClusterIP 10.0.129.117 <none> 443/TCP 25h
PS C:\WINDOWS\system32>

I have application provided by vendor which is supposed to installed by Helm Package Manager. They require NGIX:Ingress to be configured.

Based on output above, do you think Ingress is configured ?
Thanks