freakynit / go-k8s

go-lang helloworld docker application with kubernetes

Multi-node k8s cluster with loadbalancer and local, private registry

To enable local registry, add following to ~/.docker/daemon.json

"insecure-registries": [
	"registry.localhost:5000"
],
"registry-mirrors": [
	"https://registry-1.docker.io"
]

Start local registry server in docker container

k3d registry create registry.localhost --port 5000

Create kubernetes cluster

k3d cluster create --api-port 0.0.0.0:6550 -p "8081:80@loadbalancer" --registry-use k3d-registry.localhost:5000 --registry-config k3d-registries.yaml --agents 2 mycluster

Build docker image for application

docker build -t freakynit/go-k8s:1.0.0 .

Tag this image with local registry host

docker tag freakynit/go-k8s:1.0.0 k3d-registry.localhost:5000/go-k8s:1.0.0

Add following entries to /etc/hosts

127.0.0.1 loadbalancer
127.0.0.1 k3d-registry.localhost
::1       k3d-registry.localhost

Push this image to local registry

docker push k3d-registry.localhost:5000/go-k8s:1.0.0

Apply kubernetes config file

Make sure that current context is of this cluster (latest version as of now does this already after creating new cluster)

kubectl apply -f k8s-deployment.yaml

Check pods are running

kubectl get pod

Access service

curl localhost:8081/
# OR
curl loadbalancer:8081/

Delete cluster

k3d cluster delete mycluster