tanduong / devops-saigon-k8s-2023

Kubernetes 101

slides

Roll Out Demo

Recording:

make build-all
make deploy-v1
make expose
NODE_PORT=$(kubectl get services/kubernetes-bootcamp -o json | jq '.spec.ports[0].nodePort')
while true;do curl $(minikube -p cluster ip):${NODE_PORT};sleep 1;done

kubectl scale deployments/kubernetes-bootcamp --replicas=2
make deploy-v2
make deploy-v3

# deploy kubeview for graph visualization
kubectl apply -f kubeview
minikube -p cluster service -n kubeview kubeview
# terminal tracing
kubespy trace deploy kubernetes-bootcamp

Set up

Multi node minikube cluster with local registry

requires docker (using orbstack for MacOS), docker-buildx and Minikube

minikube -p cluster start --nodes 2 --insecure-registry "10.0.0.0/24"
minikube -p cluster addons enable metrics-server
minikube -p cluster addons enable dashboard
minikube -p cluster addons enable registry
docker run --rm -it --network=host alpine ash -c "apk add socat && socat TCP-LISTEN:5000,reuseaddr,fork TCP:$(minikube -p cluster ip):5000" &

References

• minikube
• hello-minikube
• Kubernetes 101
• Skaffold

Advanced Minikube config

• minikube multi-node
• Local registry for multi-node
• Ingress DNS

Rolling update demo

• benc-uk/KubeView
• GKE Rolling Update
• Kubernetes Downward API

Tools:

• kubespy
• stern
• jq
• tmux

resize pane on MacOS - ctrl+b :

resize-pane -U <amount-up>
resize-pane -D <amount-down>
resize-pane -L <amount-left>
resize-pane -R <amount-right>