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load-balancing-services

README.md

Set up load balancing requests to Kubernetes services with Ingress NGINX

setup.png

Prerequisites

Before you want to try this on your local, here are requirements

  • Directly download Virtualbox and install, or use homebrew 
    brew install --cask virtualbox
  • Vagrant 
    brew install --cask vagrant
  • (Optional) Vagrant Manager 
    brew install --cask vagrant-manager

Setup Kubernetes cluster

Follow Create a HA Kubernetes cluster with kubeadm, keepalived, and haproxy by Ansible to set up a HA Kubernetes cluster.

Install NGINX ingress controller

kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.1.1/deploy/static/provider/baremetal/deploy.yaml
kubectl -n ingress-nginx  get pods

Patch ingress-nginx-controller service to set nodePort to 30100 and 30101

kubectl -n ingress-nginx patch svc ingress-nginx-controller --patch \
  '{"spec": { "type": "NodePort", "ports": [ { "port": 80, "nodePort": 30100 }, { "port": 443, "nodePort": 30101 } ] } }'
kubectl -n ingress-nginx get svc

Patch ingress-nginx-controller configmap to for use-proxy-protocol

kubectl -n ingress-nginx patch configmap ingress-nginx-controller --patch-file patch-configmap.yaml

Configure load balancing requests to ingress-nginx service

See task Configure haproxy in lb_playbook.yml

Verify by deploying a nginx into Kubernetes cluster

Source: https://kubernetes.io/docs/concepts/services-networking/connect-applications-service/

Deploy

kubectl apply -f my-nginx-deploy.yaml
kubectl get pods -l run=my-nginx

Expose service

kubectl apply -f my-nginx-svc.yaml
kubectl get svc my-nginx

nip.io allows us to map any IP Address to a hostname using the defined formats, then we do not need to edit etc/hosts file

kubectl apply -f my-nginx-ingress.yaml

Open on browser http://172.16.0.16.nip.io, or

open http://172.16.0.16.nip.io