Using Argo Rollouts to Deploy Applications

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##############################################
# Using Argo rollouts to deploy applications #
##############################################
############################################
# Installing and configuring Argo rollouts #
############################################
# Docker desktop (docker-istio.sh): https://gist.github.com/a3025923ad025215fe01594f937d4298)
# Minikube (minikube-istio.sh): https://gist.github.com/1ab5f877852193e8ebd33a97ae170612)
# GKE (gke-istio.sh): https://gist.github.com/d5c93afc83535f0b5fec93bd03e447f4)
# EKS (eks-istio.sh): https://gist.github.com/2ebbabc3ff515ed27b2e46c0201fb1f8)
# AKS (aks-istio.sh): https://gist.github.com/2ec945256e3901fee1a62bb04d8b53b0)
# If macOS
brew install \
    argoproj/tap/kubectl-argo-rollouts
# If Linux or WSL
curl -LO https://github.com/argoproj/argo-rollouts/releases/download/v0.9.1/kubectl-argo-rollouts-linux-amd64
# If Linux or WSL
chmod +x kubectl-argo-rollouts-linux-amd64
# If Linux or WSL
sudo mv ./kubectl-argo-rollouts-linux-amd64 \
    /usr/local/bin/kubectl-argo-rollouts
kubectl argo rollouts --help
kubectl create namespace argo-rollouts
kubectl --namespace argo-rollouts apply \
    --filename https://raw.githubusercontent.com/argoproj/argo-rollouts/stable/manifests/install.yaml
git clone https://github.com/vfarcic/devops-toolkit.git
cd devops-toolkit
git pull
cat helm/templates/rollout.yaml
cat helm/templates/hpa.yaml
cat helm/templates/istio.yaml
cat helm/values.yaml
###############################
# Deploying the first release #
###############################
cat rollout/values-pause-x2.yaml
helm upgrade --install \
    devops-toolkit helm \
    --namespace devops-toolkit \
    --create-namespace \
    --values rollout/values-pause-x2.yaml \
    --set ingress.host=devops-toolkit.$ISTIO_HOST.nip.io \
    --set image.tag=2.6.2 \
    --wait
helm upgrade --install \
    devops-toolkit helm \
    --namespace devops-toolkit \
    --create-namespace \
    --values rollout/values-pause-x2.yaml \
    --set ingress.host=devops-toolkit.$ISTIO_HOST.nip.io \
    --set image.tag=2.6.2 \
    --wait
kubectl argo rollouts \
    --namespace devops-toolkit \
    get rollout devops-toolkit-devops-toolkit \
    --watch
# If NOT Minikube
open http://devops-toolkit.$ISTIO_HOST.nip.io
####################################################
# Deploying new releases using the Canary strategy #
####################################################
helm upgrade devops-toolkit helm \
    --namespace devops-toolkit \
    --reuse-values \
    --set image.tag=2.9.9
kubectl argo rollouts \
    --namespace devops-toolkit \
    get rollout devops-toolkit-devops-toolkit \
    --watch
# If NOT Minikube
for i in {1..100}; do
    curl -s http://devops-toolkit.$ISTIO_HOST.nip.io \
        | grep -i "catalog, patterns, and blueprints"
done | wc -l
# If Minikube
for i in {1..100}; do
    curl -s -H "Host: devopstoolkitseries.com" \
        "http://$ISTIO_HOST" \
        | grep -i "catalog, patterns, and blueprints"
done | wc -l
kubectl --namespace devops-toolkit \
    get virtualservice \
    devops-toolkit-devops-toolkit \
    --output yaml
kubectl argo rollouts \
    --namespace devops-toolkit \
    promote devops-toolkit-devops-toolkit
kubectl argo rollouts \
    --namespace devops-toolkit \
    get rollout devops-toolkit-devops-toolkit \
    --watch
# If not Minikube
for i in {1..100}; do
    curl -s http://devops-toolkit.$ISTIO_HOST.nip.io \
        | grep -i "catalog, patterns, and blueprints"
done | wc -l
# If Minikube
for i in {1..100}; do
    curl -s -H "Host: devopstoolkitseries.com" \
        "http://$ISTIO_HOST" \
        | grep -i "catalog, patterns, and blueprints"
done | wc -l
kubectl argo rollouts \
    --namespace devops-toolkit \
    promote devops-toolkit-devops-toolkit
kubectl argo rollouts \
    --namespace devops-toolkit \
    get rollout devops-toolkit-devops-toolkit \
    --watch
# If not Minikube
for i in {1..100}; do
    curl -s http://devops-toolkit.$ISTIO_HOST.nip.io \
        | grep -i "catalog, patterns, and blueprints"
done | wc -l
# If Minikube
for i in {1..100}; do
    curl -s -H "Host: devopstoolkitseries.com" \
        "http://$ISTIO_HOST" \
        | grep -i "catalog, patterns, and blueprints"
done | wc -l
#############################
# Rolling back new releases #
#############################
helm upgrade devops-toolkit helm \
    --namespace devops-toolkit \
    --reuse-values \
    --set image.tag=2.9.17
kubectl argo rollouts \
    --namespace devops-toolkit \
    get rollout devops-toolkit-devops-toolkit \
    --watch
# Do not run this command
kubectl argo rollouts \
    --namespace devops-toolkit \
    abort devops-toolkit-devops-toolkit
helm upgrade devops-toolkit helm \
    --namespace devops-toolkit \
    --reuse-values \
    --set image.tag=2.9.9
kubectl argo rollouts \
    --namespace devops-toolkit \
    get rollout devops-toolkit-devops-toolkit \
    --watch
############################################################
# Exploring Prometheus metrics and writing rollout queries #
############################################################
echo $ISTIO_HOST
# Open a second terminal session.
export ISTIO_HOST=[...]
# If not Minikube
while true; do
    curl -I http://devops-toolkit.$ISTIO_HOST.nip.io
    sleep 1
done
# If Minikube
while true; do
    curl -I -H "Host: devopstoolkitseries.com" \
        "http://$ISTIO_HOST"
    sleep 1
done
# If WSL and `sleep` fails with `sleep: cannot read realtime clock: Invalid argument` (it's a bug in WSL 1, upgrades Ubuntu to 20.04)
sudo apt-mark hold libc6
# If WSL and `sleep` fails with `sleep: cannot read realtime clock: Invalid argument` (it's a bug in WSL 1, upgrades Ubuntu to 20.04)
sudo apt -y --fix-broken install
# If WSL and `sleep` fails with `sleep: cannot read realtime clock: Invalid argument` (it's a bug in WSL 1, upgrades Ubuntu to 20.04)
sudo apt update
# If WSL and `sleep` fails with `sleep: cannot read realtime clock: Invalid argument` (it's a bug in WSL 1, upgrades Ubuntu to 20.04)
sudo apt -y full-upgrade
# Go back to the first terminal session
helm repo add prometheus \
    https://prometheus-community.github.io/helm-charts
helm upgrade --install \
    prometheus prometheus/prometheus \
    --namespace monitoring \
    --create-namespace \
    --wait
kubectl --namespace monitoring \
    port-forward deployment/prometheus-server \
    9090 &
open http://localhost:9090
# Prometheus query (uncomment first):
# istio_requests_total
# Prometheus query (uncomment first):
# sum(irate(
#   istio_requests_total{
#     reporter="source",
#     destination_service=~"devops-toolkit-devops-toolkit.devops-toolkit.svc.cluster.local"
#   }[2m]
# ))
# Prometheus query (uncomment first):
# sum(irate(
#   istio_requests_total{
#     reporter="source",
#     destination_service=~"devops-toolkit-devops-toolkit.devops-toolkit.svc.cluster.local",
#     response_code=~"2.*"
#   }[2m]
# )) / sum(irate(
#   istio_requests_total{
#     reporter="source",
#     destination_service=~"devops-toolkit-devops-toolkit.devops-toolkit.svc.cluster.local"
#   }[2m]
# ))
pkill kubectl
################################
# Exploring Automated Analysis #
################################
cat rollout/values-analysis.yaml
cat helm/values.yaml
cat helm/templates/rollout.yaml
kubectl delete namespace devops-toolkit
#################################################
# Deploying releases with fully automated steps #
#################################################
# If NOT Minikube
helm upgrade --install \
    devops-toolkit helm \
    --namespace devops-toolkit \
    --create-namespace \
    --values rollout/values-analysis.yaml \
    --set ingress.host=devops-toolkit.$ISTIO_HOST.nip.io \
    --set image.tag=2.6.2 \
    --wait
# If Minikube
helm upgrade --install \
    devops-toolkit helm \
    --namespace devops-toolkit \
    --create-namespace \
    --values rollout/values-analysis.yaml \
    --set image.tag=2.6.2 \
    --wait
kubectl argo rollouts \
    --namespace devops-toolkit \
    get rollout devops-toolkit-devops-toolkit \
    --watch
# Go to the second terminal
# If not Minikube
while true; do
    curl -I http://devops-toolkit.$ISTIO_HOST.nip.io/this-does-not-exist
    sleep 1
done
# If Minikube
while true; do
    curl -I -H "Host: devopstoolkitseries.com" \
        "http://$ISTIO_HOST/this-does-not-exist"
    sleep 1
done
# Go to the first terminal session
helm upgrade devops-toolkit helm \
    --namespace devops-toolkit \
    --reuse-values \
    --set image.tag=2.9.9
kubectl argo rollouts \
    --namespace devops-toolkit \
    get rollout devops-toolkit-devops-toolkit \
    --watch
# Go to the second terminal session
# If NOT Minikube
while true; do
    curl -I http://devops-toolkit.$ISTIO_HOST.nip.io
    sleep 1
done
# If Minikube
while true; do
    curl -I -H "Host: devopstoolkitseries.com" \
        "http://$ISTIO_HOST"
    sleep 1
done
helm upgrade devops-toolkit helm \
    --namespace devops-toolkit \
    --reuse-values \
    --set image.tag=2.9.17
kubectl argo rollouts \
    --namespace devops-toolkit \
    get rollout devops-toolkit-devops-toolkit \
    --watch
# Stop the rollout and loops in both terminals
# Go to the first terminal session
#####################
# What Happens Now? #
#####################
kubectl delete namespace devops-toolkit
kubectl delete namespace argo-rollouts
kubectl delete namespace monitoring
cd ..

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