Weighted-Routing(Canary) with Kubernetes and Istio

Final Architecture Preview

Weighted-Routing (Canary) for two deployments (versions)

Prerequisites

Environment Setup

minikube

# Update your system
sudo apt-get update -y
sudo apt-get upgrade -y
# Install required packages
sudo apt-get install curl wget apt-transport-https -y
# Download latest minikube
wget https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64
# Add minikube to $PATH and give executable permission
sudo cp minikube-linux-amd64 /usr/local/bin/minikube
sudo chmod +x /usr/local/bin/minikube
# Verify installation
minikube version

kubectl

sudo apt-get update && sudo apt-get install -y apt-transport-httpscurl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -echo "deb https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee -a /etc/apt/sources.list.d/kubernetes.listsudo apt-get update
sudo apt-get install -y kubectl
kubectl version -o json

Helm

curl https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3 | bash

Create Minikube Cluster

sudo minikube start --memory=8192 --cpus=4 --kubernetes --vm-driver none# To run minikube as your user from now on
sudo mv /home/$USER/.kube /home/$USER/.minikube $HOME
sudo chown -R $USER /home/$USER/.kube /home/$USER/.minikube
minikube status

Install Istio

# Download Istio version 1.4.0
curl -L https://git.io/getLatestIstio | ISTIO_VERSION=1.4.0 sh -
cd istio-1.4.0# Deploy Istio Custom Resource Definitions
for i in install/kubernetes/helm/istio-init/files/crd*yaml; do kubectl apply -f $i; done
# Deploy Istio Components
kubectl apply -f install/kubernetes/istio-demo.yaml
# Wait pods to be Running
watch -n1 kubectl get pods -n istio-system
# Enable sidecar injection
kubectl label namespace default istio-injection=enabled
Verify that the istio-system is created by watch command

Deploy Two Version for Our Service

# Create two directories for creating Docker images inside them
mkdir production feature
# Download Dockerfile, two package.json and two server.js
curl https://raw.githubusercontent.com/Hmerac/AWSCSAProNotes/master/Dockerfile | tee production/Dockerfile feature/Dockerfile
curl https://raw.githubusercontent.com/Hmerac/AWSCSAProNotes/master/package.json | tee production/package.json feature/package.jsoncurl https://raw.githubusercontent.com/Hmerac/AWSCSAProNotes/master/server_production.js --output production/server.jscurl https://raw.githubusercontent.com/Hmerac/AWSCSAProNotes/master/server_feature.js --output feature/server.js# Build Docker images
docker build -f production/Dockerfile -t hmerac/nodejs:production ./production
docker build -f feature/Dockerfile -t hmerac/nodejs:feature ./feature# Verify the Docker images
docker images
# Deploy our NodeJS service
kubectl apply -f https://raw.githubusercontent.com/Hmerac/AWSCSAProNotes/master/final_solution/istio_components/service.yml
# Make the production deployment for our NodeJS service
kubectl apply -f https://raw.githubusercontent.com/Hmerac/AWSCSAProNotes/master/final_solution/istio_components/deployment_production.yml
All of the traffic is being routed to Production
# Create Ingress Gateway
kubectl apply -f https://raw.githubusercontent.com/Hmerac/AWSCSAProNotes/master/final_solution/istio_components/ingress_gateway.yml
# Create Virtual Service
kubectl apply -f https://raw.githubusercontent.com/Hmerac/AWSCSAProNotes/master/final_solution/istio_components/virtual_service.yml
# Create Destination Rule
kubectl apply -f https://raw.githubusercontent.com/Hmerac/AWSCSAProNotes/master/final_solution/istio_components/destination_rule.yml
echo “$(kubectl get service -n istio-system | grep ingress | awk ‘{print $3}’) nodejs.com” | sudo tee -a /etc/hosts
Making requests to Ingress Gateway
# Make the feature deployment for our NodeJS service
kubectl apply -f https://raw.githubusercontent.com/Hmerac/AWSCSAProNotes/master/final_solution/istio_components/deployment_feature.yml
One out of nine requests hit Feature version

From Vault 11, the Last Survivor 💫 I have a theoretical degree in Theoretical Physics 👨‍🎓