canary_blue_green.md

set zone

gcloud config set compute/zone us-central1-a

copy source

gsutil -m cp -r gs://spls/gsp053/orchestrate-with-kubernetes . cd orchestrate-with-kubernetes/kubernetes

create a cluster of 5 nodes

gcloud container clusters create bootcamp --num-nodes 5 --scopes "https://www.googleapis.com/auth/projecthosting,storage-rw"

see parameters of deployment

kubectl explain deployment

kubectl explain deployment --recursive

kubectl explain deployment.metadata.name

deploy auth

kubectl create -f deployments/auth.yaml

check

kubectl get deployments kubectl get replicasets kubectl get pods

create service for auth

kubectl create -f services/auth.yaml

create deployment and service for hello

kubectl create -f deployments/hello.yaml kubectl create -f services/hello.yaml

create and expose frontend

kubectl create secret generic tls-certs --from-file tls/ kubectl create configmap nginx-frontend-conf --from-file=nginx/frontend.conf kubectl create -f deployments/frontend.yaml kubectl create -f services/frontend.yaml

check

kubectl get services frontend curl -ks https://

curl -ks https://kubectl get svc frontend -o=jsonpath="{.status.loadBalancer.ingress[0].ip}"

see meaning of replicas

kubectl explain deployment.spec.replicas

scale

kubectl scale deployment hello --replicas=5

check number of pods

kubectl get pods | grep hello- | wc -l

scale down

kubectl scale deployment hello --replicas=3

rolling update

kubectl edit deployment hello

check

kubectl get replicaset kubectl rollout history deployment/hello

pause rolling update

kubectl rollout pause deployment/hello

check status

kubectl rollout status deployment/hello

kubectl get pods -o jsonpath --template='{range .items[*]}{.metadata.name}{"\t"}{"\t"}{.spec.containers[0].image}{"\n"}{end}'

resume rolling update

kubectl rollout resume deployment/hello

rollback

kubectl rollout undo deployment/hello

check

kubectl rollout history deployment/hello kubectl get pods -o jsonpath --template='{range .items[*]}{.metadata.name}{"\t"}{"\t"}{.spec.containers[0].image}{"\n"}{end}'

canary deployment

kubectl create -f deployments/hello-canary.yaml

check

kubectl get deployments

curl -ks https://kubectl get svc frontend -o=jsonpath="{.status.loadBalancer.ingress[0].ip}"/version

blue deployment (just update the service)

kubectl apply -f services/hello-blue.yaml

create green deployment

kubectl create -f deployments/hello-green.yaml

deploy green service

kubectl apply -f services/hello-green.yaml

rollback to blue

kubectl apply -f services/hello-blue.yaml