How to Setup Metal LB for Nginx Ingress Loadbalancer IP in Kubernetes

 

At first create namespace

kubectl apply -f https://raw.githubusercontent.com/metallb/metallb/v0.10.2/manifests/namespace.yaml

Then install metal lb

kubectl apply -f https://raw.githubusercontent.com/metallb/metallb/v0.10.2/manifests/metallb.yaml

Check the available IP for loadbalancer of your virtual subnet

Then set the IP in the below configmap and apply

apiVersion: v1

kind: ConfigMap

metadata:

namespace: metallb-system

name: config

data:

config: |

address-pools:

- name: default

protocol: layer2

addresses:

- 172.16.1.230-172.16.1.230

kubectl apply -f config.yaml

Next set up the nginx ingress controller using helm

Create a internal-ingress.yaml file for configuration

controller:

config:

use-forwarded-headers: "true"

server-tokens: "False"

service:

loadBalancerIP: 172.16.1.230

Then install using helm

helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx

helm repo update

helm install ingress-nginx ingress-nginx/ingress-nginx  -f  internal-ingress.yaml

 

Check the service and External IP of loadbalancer

 

kubectl get svc

 

Now create a simple deployment and ingress for nginx default page

 

deployment.yaml

apiVersion: apps/v1

kind: Deployment

metadata:

labels:

run: nginx

name: nginx-deploy

spec:

replicas: 1

selector:

matchLabels:

run: nginx

template:

metadata:

labels:

run: nginx

spec:

containers:

- image: nginx

name: nginx

kubectl apply -f deployment.yaml

create a service

kubectl expose deploy nginx-deploy --port 80

create an updated ingress.yaml (kubernetes updated ingress)

apiVersion: networking.k8s.io/v1

kind: Ingress

metadata:

annotations:

kubernetes.io/ingress.class: nginx

nginx.ingress.kubernetes.io/configuration-snippet: |

more_set_headers "X-Frame-Options: Deny";

more_set_headers "X-Xss-Protection: 1; mode=block";

more_set_headers "X-Content-Type-Options: nosniff";

name: nginx-deploy

namespace: default

spec:

rules:

- host: nginx.devops.com

http:

paths:

- backend:

service:

name: nginx-deploy

port:

number: 80

path: /

pathType: ImplementationSpecific

 

 

Then apply the yaml files

kubectl apply -f ingress.yaml

 

Go to /etc/hosts and add the loadbalancer ip and site address

sudo nano /etc/hosts

 

172.16.1.230  nginx.devops.com 

 

Save it and check

curl http://nginx.devops.com

You can see the nginx welcome page

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About Ashadullah Shawon

I am Ashadullah Shawon. I am a Software Engineer. I studied Computer Science and Engineering (CSE) at RUET. I Like To Share Knowledge. Learn More: Click Here