#####################
# Deploying The App
#####################

$ cd go-demo-7

$ kubectl create namespace go-demo-7

$ kubectl label namespace go-demo-7 \
 istio-injection=enabled

$ kubectl --namespace go-demo-7 apply \
 --filename k8s/istio/flagger/db \
 --recursive

$ kubectl --namespace go-demo-7 apply \
 --filename k8s/istio/flagger/app \
 --recursive

$ kubectl --namespace go-demo-7 \
 rollout status \
 deployment go-demo-7

$ kubectl --namespace go-demo-7 \
 rollout status \
 deployment go-demo-7-primary

$ kubectl --namespace go-demo-7 \
 get deployments

$ chmod +x k8s/istio/get-ingress-host.sh

$ INGRESS_HOST=$(\
 ./k8s/istio/get-ingress-host.sh \
 $PROVIDER)

$ echo ${INGRESS_HOST}

$ curl -H "Host: go-demo-7.acme.com" \
 "http://$INGRESS_HOST/version"

##########################
# Rolling Back On Errors
##########################

$ cat k8s/istio/flagger/exercise/flagger-error.yaml

$ kubectl --namespace go-demo-7 apply \
 --filename k8s/istio/flagger/exercise/flagger-error.yaml

$ echo $INGRESS_HOST

# Open a second terminal session

$ export INGRESS_HOST=[...]

$ while true; do
curl -H "Host: go-demo-7.acme.com" \
 "http://$INGRESS_HOST/demo/random-error"
sleep 0.5
done

# Go back to the first terminal session

$ kubectl --namespace go-demo-7 apply \
 --filename k8s/istio/flagger/exercise/deployment-0-0-2.yaml

$ kubectl --namespace go-demo-7 \
 describe canary go-demo-7

****
  Warning  Synced  15s                flagger  Halt go-demo-7.go-demo-7 advancement success rate 92.31% < 99%

# Go to the second terminal session and stop the loop with _ctrl+c_

########################################
# Rolling Back On Max Request Duration
########################################

# Go to the first terminal session

$ cat k8s/istio/flagger/exercise/flagger-max-req-duration.yaml

$ kubectl --namespace go-demo-7 apply \
 --filename k8s/istio/flagger/exercise/flagger-max-req-duration.yaml

# Go to second terminal session

$ while true; do
DELAY=$[ $RANDOM % 3000 ]
    curl -H "Host: go-demo-7.acme.com" \
        "http://${INGRESS_HOST}/demo/hello?delay=$DELAY"
done

# Go back to the first terminal session

$ kubectl --namespace go-demo-7 apply \
 --filename k8s/istio/flagger/exercise/deployment-0-0-3.yaml

$ kubectl --namespace go-demo-7 \
 describe canary go-demo-7

***
  Normal   Synced  89s (x2 over 67m)    flagger  Advance go-demo-7.go-demo-7 canary weight 20
  Warning  Synced  29s                  flagger  Halt go-demo-7.go-demo-7 advancement success rate 90.19% < 99%

# Go to the second terminal and stop the loop with _ctrl+c_

###################
# Rolling Forward
###################

# Go to second terminal session

$ while true; do
curl -H "Host: go-demo-7.acme.com" \
 "http://$INGRESS_HOST/demo/hello"
sleep 0.5
done

# Go back to the first terminal session

$ kubectl --namespace go-demo-7 apply \
 --filename k8s/istio/flagger/exercise/deployment-0-0-5.yaml

$ kubectl --namespace go-demo-7 \
 describe canary go-demo-7

# Go to the second terminal and stop the loop with _ctrl+c_

###############
# Cleaning Up
###############

$ cd ..

$ kubectl delete namespace go-demo-7