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kubernetes-poc's Introduction

Kubernetes PoC

Consists of: external service, internal service, database

Architecture

Run on Kubernetes

Install the Nginx Ingress Controller:

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

Install Cert-Manager:

kubectl apply -f https://github.com/cert-manager/cert-manager/releases/download/v1.14.5/cert-manager.yaml
helm repo add jetstack https://charts.jetstack.io
helm repo update
helm install cert-manager jetstack/cert-manager --namespace cert-manager --create-namespace

Preparations:

  • Build the images for internal-service and external-service by running the deploy.sh scripts and terminate them again
  • Run minikube:
minikube start --apiserver-ips 0.0.0.0
minikube dashboard
  • Add the built images to the local minikube registry:
minikube image load image-name:tag

Deploy resources:

kubectl apply -f 01-mysql-deployment.yaml
kubectl apply -f 02-internal-service-deployment.yaml
kubectl apply -f 03-external-service-deployment.yaml
kubectl apply -f 04-external-service-ingress.yaml
kubectl apply -f 05-letsencrypt-clusterissuer.yaml

Update deployment:

Apply the YAML files again.

Get IP for minikube:

Used internal IP:

kubectl get nodes -o wide

Remove deployment:

kubectl delete deployment external-service
kubectl delete service external-service
kubectl delete ingress external-service-ingress

DigitalOcean:

Expected image names: registry.digitalocean.com/<your-registry-name>/<image-name>:<tag>

Connect with DigitalOcean: doctl registry login

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