doctoritcoder / gdg-demo

Introduction to Kubernetes with GKE for GDG session demo

GDG Demo

Sessions and links

• Introduction to Kubernetes and GKE (English)
  • Facebook live: https://www.facebook.com/gdgcloudkl/videos/1013942759041907
  • Youtube live: https://www.youtube.com/watch?v=ht0ynVjkDcI
  • Slide: https://www.slideshare.net/opsta/introduction-to-kubernetes-and-gke
• Introduction to Kubernetes with demo (Thai)
  • Facebook live: https://www.facebook.com/imcinstitute/videos/4199946253380670
  • Slide: https://bit.ly/opsta-k8s-intro

Prequisite

• gcloud with initial account and project
• kubectl
• helm

Kubernetes Tutorials

Create GKE Cluster

gcloud container clusters create gdg-demo --num-nodes 4 --zone asia-southeast1-a
# Wait for few minutes

• Walkthrough GKE features
  • Create Cluster with one click
  • High Availability Cluster
  • Choose Kubernetes Version
  • Create pools and choose number of nodes
  • Nodes autoscaling
  • Size of nodes
  • Preemptible nodes
  • Networking to do private cluster
  • Shielded GKE Nodes
  • Create GKE Cluster with command line
  • See created cluster for one click upgrade available option

Deploy Pod

kubectl apply -f 01-pod.yaml
kubectl get pod
kubectl exec -it linux -c busybox -- sh
ping www.google.com
kubectl exec -it linux -c alpine -- sh
ping www.google.com

• Walkthrought Workloads Dashboard
  • Overview configuration
  • CPU, Memory, Disk
  • Events
  • Logs
  • YAML

Deploy Nginx Deployment

kubectl apply -f 02-deployment.yaml
kubectl get deployment
kubectl get pod
watch kubectl get pod
# Scale replica to 3 on dashboard

Deploy Nginx Service

kubectl apply -f 03-service-nginx-lb.yaml
kubectl get service -w
# Wait for few minutes until EXTERNAL-IP shows up
# Try to access to Nginx

• Walkthrough Services & Ingress Dashboard

Deploy MariaDB with ClusterIP Service

kubectl apply -f 04-mariadb.yaml
kubectl get deployment
kubectl get pod -w
kubectl get service
# Wait for a minute to fully start MariaDB

# Test connect to MariaDB
kubectl exec -it linux -c busybox -- sh
telnet mariadb 3306

Deploy Ingress

helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx
helm repo update
helm install ingress-nginx ingress-nginx/ingress-nginx
kubectl get deployment
kubectl get pod -w
kubectl get service -w
# Try to access to http://ipaddress

• Deploy Ingress to Nginx Service

kubectl apply -f 05-ingress-to-nginx.yaml
# Try to access from http://ipadress/nginx

• Deploy Ingress to Apache Service

kubectl apply -f 06-apache.yaml
# Try to access from http://ipadress/apache

Namespace

kubectl get namespace
kubectl create namespace dev
kubectl get namespace
kubectl apply -f 02-deployment.yaml --namespace dev
kubectl get pod
kubectl get pod --namespace dev

Rolling Update

watch -n1 kubectl get pod
# Rolling Update on Dashboard to httpd image

Bonus install Wordpress with Helm

helm repo add bitnami https://charts.bitnami.com/bitnami
helm repo update
helm install wordpress bitnami/wordpress
kubectl get pod -w
kubectl get service -w
# Access via http://ipaddress

Destroy Everything

gcloud container clusters delete gdg-demo --zone asia-southeast1-a