Setup of the DEV environment

by Fabiano Sbaratta

Tested on: OS Ubuntu 20.04.2 LTS - 64 bit - 16Gb RAM

Installing NodeJs NPM Typescript

sudo apt udpate sudo apt install nodejs npm node-typescript

Installing DOCKER

sudo apt install docker.io

Installing MINIKUBE (kubernates)

sudo apt install apt-transport-https curl

wget https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64

chmod +x minikube-linux-amd64

sudo mv minikube-linux-amd64 /usr/local/bin/minikube

(actual minikube version ### v1.21.0)

Installing KUBECTL (kubernates command-line tool)

curl -LO https://storage.googleapis.com/kubernetes-release/release/`curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt`/bin/linux/amd64/kubectl

chmod +x kubectl

sudo mv kubectl /usr/local/bin/

( kubectl version -o json ### v1.21.2)

Installing Docker Machine KVM Driver

curl -LO https://storage.googleapis.com/minikube/releases/latest/docker-machine-driver-kvm2

chmod +x docker-machine-driver-kvm2

sudo mv docker-machine-driver-kvm2 /usr/local/bin/

Set-up minikube with KVM

sudo apt-get install qemu-kvm libvirt-daemon-system libvirt-clients bridge-utils virt-manager

sudo addgroup libvirt

sudo usermod -aG libvirt $USER

newgrp libvirt

minikube config set vm-driver kvm2

Installing Skaffold

to automatize tasks in a Kubernates env. (like update code in a running pod)

curl -Lo skaffold https://storage.googleapis.com/skaffold/releases/latest/skaffold-linux-amd64

chmod +x skaffold

sudo mv skaffold /usr/local/bin/

RUNNING THE ENVIRONMENT

Start minikube

minikube start

Configure the Ingress add-on to manage external access to the services in a cluster and load balancing features (see attached doc Ingress.odg)

minikube addons enable ingress

Set a secret on kubernates to store the jwt key

kubectl create secret generic jwt-secret --from-literal=JWT_KEY=****

Create the persistent volumes

kubectl apply -f PROJECT-FOLDER/infrastructure/pv/pv-volume.yaml

kubectl apply -f challenge-portal/infrastructure/persistent-volume/auth-pv-volume.yaml kubectl apply -f challenge-portal/infrastructure/persistent-volume/customers-pv-volume.yaml kubectl apply -f challenge-portal/infrastructure/persistent-volume/tickets-pv-volume.yaml

- check with "kubectl get pv task-pv-volume"

Create the persistent volume claims

kubectl apply -f PROJECT-FOLDER/infrastructure/pv/pv-claim.yaml

kubectl apply -f challenge-portal/infrastructure/persistent-volume/auth-pv-claim.yaml kubectl apply -f challenge-portal/infrastructure/persistent-volume/customers-pv-claim.yaml kubectl apply -f challenge-portal/infrastructure/persistent-volume/tickets-pv-claim.yaml

- check again with "kubectl get pv task-pv-volume" that the status is "bound"

- "kubectl get pvc task-pv-claim" will show the claim bounded to the volume

Launch Skaffold

skaffold dev

- check with "kubectl get ing" and "kubectl get pods -n kube-system | grep nginx-ingress-controller"

- the host later created emmachallenge.dev in /etc/hosts must point to the load balancer IP received from kubectl command

- Some useful commands -

minikube addons list

minikube config view

kubectl get pv,pvc

kubectl describe pv,pvc

kubectl delete pvc --all

kubectl port-forward api-mongo-depl-0 27017:27017

Install metrics-server

wget https://raw.githubusercontent.com/pythianarora/total-practice/master/sample-kubernetes-code/metrics-server.yaml kubectl create -f metrics-server.yaml kubectl top pods --use-protocol-buffers