#
# Preparar del entorno
#

# Instalar herramientas basicas
sudo apt update && sudo apt install -y git curl nano

# Instalar Docker
sudo snap install docker
sudo addgroup --system docker
sudo adduser $USER docker
newgrp docker
sudo snap disable docker
sudo snap enable docker

# Instalar kind

curl -Lo ./kind https://kind.sigs.k8s.io/dl/v0.22.0/kind-linux-amd64
chmod +x ./kind
sudo mv kind /usr/local/bin

# Instalar kubectl

curl -Lo ./kubectl https://dl.k8s.io/release/v1.29.2/bin/linux/amd64/kubectl
chmod +x ./kubectl
sudo mv ./kubectl /usr/local/bin

# Descargar el código

git clone https://gitlab.com/gabrielarellano/tutorial-kubernetes-kind.git
cd tutorial-kubernetes-kind

# Crear el cluster

kind create cluster --config=cluster-config.yaml
kubectl get nodes
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.10.1/deploy/static/provider/kind/deploy.yaml
sudo sed -i '1i127.0.114.100   cluster-prueba.k8s.local vote.k8s.local result.k8s.local' /etc/hosts

#
# Deployments kubectl
#

kubectl version
kubectl get nodes
kubectl create deployment kubernetes-bootcamp --image=gcr.io/google-samples/kubernetes-bootcamp:v1
kubectl get deployments

# en otra terminal
kubectl proxy

# de nuevo en la terminal original
curl http://localhost:8001/version
export POD_NAME=$(kubectl get pods -o go-template --template '{{range .items}}{{.metadata.name}}{{"\n"}}{{end}}')
echo "Nombre del Pod: $POD_NAME"
curl "http://localhost:8001/api/v1/namespaces/default/pods/$POD_NAME/"

#
# Viendo Pods y Nodos
#

kubectl get pods
kubectl describe pods

# en otra terminal (en caso de no tenerlo corriendo del paso anterior)
kubectl proxy

# de nuevo en la terminal original
export POD_NAME="$(kubectl get pods -o go-template --template '{{range .items}}{{.metadata.name}}{{"\n"}}{{end}}')"
echo "Nombre del Pod: $POD_NAME"
curl "http://localhost:8001/api/v1/namespaces/default/pods/$POD_NAME/proxy/"
kubectl logs "$POD_NAME"
kubectl exec "$POD_NAME" -- env
kubectl exec -ti $POD_NAME -- bash
cat server.js
curl http://localhost:8080
exit

#
# usando Services
#

kubectl get pods
kubectl get services
kubectl expose deployment/kubernetes-bootcamp --type="NodePort" --port 8080
kubectl get services
kubectl describe services/kubernetes-bootcamp
export NODE_PORT="$(kubectl get services/kubernetes-bootcamp -o jsonpath='{.spec.ports[].nodePort}')"
echo "NODE_PORT=$NODE_PORT"
export NODE_IP="$(kubectl get nodes/cluster-prueba-worker -o jsonpath='{.status.addresses[0].address}')"
echo "NODE_IP=$NODE_IP"
curl "http://$NODE_IP:$NODE_PORT"

kubectl describe deployment
kubectl get pods -l app=kubernetes-bootcamp
kubectl get services -l app=kubernetes-bootcamp
export POD_NAME="$(kubectl get pods -o go-template --template '{{range .items}}{{.metadata.name}}{{"\n"}}{{end}}')"
echo "Nombre del Pod: $POD_NAME"
kubectl label pods "$POD_NAME" version=v1
kubectl describe pods "$POD_NAME"
kubectl get pods -l version=v1

kubectl delete service -l app=kubernetes-bootcamp
kubectl get services
curl "http://$NODE_IP:$NODE_PORT"
kubectl exec -ti $POD_NAME -- curl http://localhost:8080

#
# Varias instancias
#

kubectl scale deployments/kubernetes-bootcamp --replicas=4
kubectl get deployments
kubectl get pods -o wide
kubectl describe deployments/kubernetes-bootcamp
kubectl describe services/kubernetes-bootcamp
export NODE_PORT="$(kubectl get services/kubernetes-bootcamp -o jsonpath='{.spec.ports[].nodePort}')"
echo "NODE_PORT=$NODE_PORT"
export NODE_IP="$(kubectl get nodes/cluster-prueba-worker -o jsonpath='{.status.addresses[0].address}')"
echo "NODE_IP=$NODE_IP"

# Repetir varias veces
curl "http://$NODE_IP:$NODE_PORT"

kubectl scale deployments/kubernetes-bootcamp --replicas=2
kubectl get deployments
kubectl get pods -o wide

#
# Actualizaciones graduales
#

kubectl get deployments
kubectl get pods
kubectl describe pods
kubectl set image deployments/kubernetes-bootcamp kubernetes-bootcamp=jocatalin/kubernetes-bootcamp:v2
kubectl get pods
kubectl describe services/kubernetes-bootcamp
export NODE_PORT="$(kubectl get services/kubernetes-bootcamp -o jsonpath='{.spec.ports[].nodePort}')"
echo "NODE_PORT=$NODE_PORT"
export NODE_IP="$(kubectl get nodes/cluster-prueba-worker -o jsonpath='{.status.addresses[0].address}')"
echo "NODE_IP=$NODE_IP"
curl "http://$NODE_IP:$NODE_PORT"
kubectl rollout status deployments/kubernetes-bootcamp
kubectl describe pods

kubectl set image deployments/kubernetes-bootcamp kubernetes-bootcamp=gcr.io/google-samples/kubernetes-bootcamp:v10
kubectl get deployments
kubectl get pods
kubectl describe pods

kubectl rollout undo deployments/kubernetes-bootcamp
kubectl get pods
kubectl describe pods

kubectl delete deployments/kubernetes-bootcamp services/kubernetes-bootcamp

#
# Usando manifiestos
#

kubectl create namespace vote

kubectl create --namespace vote -f example_voting_app/
kubectl get all --namespace vote
kubectl get all --namespace vote -o wide

export VOTE_PORT="$(kubectl get services/vote -n vote -o jsonpath='{.spec.ports[].nodePort}')"
export VOTE_IP="$(kubectl get nodes/cluster-prueba-worker -o jsonpath='{.status.addresses[0].address}')"
echo "Vote URL: http://$VOTE_IP:$VOTE_PORT"
export RESULT_PORT="$(kubectl get services/result -n vote -o jsonpath='{.spec.ports[].nodePort}')"
export RESULT_IP="$(kubectl get nodes/cluster-prueba-worker -o jsonpath='{.status.addresses[0].address}')"
echo "Result URL: http://$RESULT_IP:$RESULT_PORT"

kubectl scale --replicas=3 deployment vote --namespace vote
kubectl get pods,replicasets --namespace vote

kubectl create --namespace vote -f ingresses_voting_app/
kubectl get ingress --namespace vote

#
# Limpiar el entorno
#

kind delete cluster cluster-prueba
sudo sed -i '/127\.0\.114/d;//d' /etc/hosts