06-02-flux-short.sh

# Source: https://gist.github.com/4fcd7b28948a502a348e5a8a466b186b

##############################
# Flux 2 With GitOps Toolkit #
##############################

# What Is GitOps And Why Do We Want It?: https://youtu.be/HKkhD6nokC8
# Argo CD: Applying GitOps Principles To Manage Production Environment In Kubernetes: https://youtu.be/vpWQeoaiRM4

#########
# Setup #
#########

minikube start

minikube addons enable ingress

export INGRESS_HOST=$(minikube ip)

# Install Flux CLI by following the instructions from https://toolkit.fluxcd.io/guides/installation/#install-the-flux-cli

# Replace `[...]` with the GitHub organization or a GitHub user if it is a personal account
export GITHUB_ORG=[...]

# Replace `[...]` with the GitHub token
export GITHUB_TOKEN=[...]

# Replace `[...]` with `true` if it is a personal account, or with `false` if it is an GitHub organization
export GITHUB_PERSONAL=[...]

#########################
# Bootstrapping Staging #
#########################

flux bootstrap github \
    --owner $GITHUB_ORG \
    --repository flux-staging \
    --branch main \
    --path apps \
    --personal $GITHUB_PERSONAL \
    --namespace flux-staging

kubectl --namespace flux-staging \
    get pods

git clone \
    https://github.com/$GITHUB_ORG/flux-staging.git

cd flux-staging

ls -1 apps

ls -1 apps/flux-staging

kubectl create namespace staging

###############################
# Deploying The First Release #
###############################

flux create source git \
    devops-toolkit-staging \
    --url https://github.com/vfarcic/devops-toolkit \
    --namespace flux-staging \
    --branch master \
    --interval 30s \
    --export \
    | tee apps/devops-toolkit-source.yaml

mkdir values

echo "image:
    tag: 2.9.9
ingress:
    host: staging.devops-toolkit.$INGRESS_HOST.xip.io" \
    | tee values/devops-toolkit.yaml

flux create helmrelease \
    devops-toolkit-staging \
    --source GitRepository/devops-toolkit-staging \
    --values values/devops-toolkit.yaml \
    --chart "helm" \
    --namespace flux-staging \
    --target-namespace staging \
    --interval 30s \
    --export \
    | tee apps/devops-toolkit-release.yaml

git add .

git commit -m "Initial commit"

git push

watch flux --namespace flux-staging \
    get helmreleases

kubectl --namespace staging \
    get pods

##########################
# Deploying New Releases #
##########################

cat apps/devops-toolkit-release.yaml \
    | sed -e "s@tag: 2.9.9@tag: 2.9.17@g" \
    | tee apps/devops-toolkit-release.yaml

git add .

git commit -m "Upgrade to 2.9.17"

git push

watch kubectl --namespace staging \
    get pods

watch kubectl --namespace staging \
    get deployment \
    staging-devops-toolkit-staging-devops-toolkit \
    --output jsonpath="{.spec.template.spec.containers[0].image}"

cd ..

############################
# Bootstrapping Production #
############################

flux bootstrap github \
    --owner $GITHUB_ORG \
    --repository flux-production \
    --branch main \
    --path apps \
    --personal $GITHUB_PERSONAL \
    --namespace flux-production

watch kubectl get ns

git clone \
    https://github.com/$GITHUB_ORG/flux-production.git

cd flux-production

kubectl create namespace production

###########################
# Promoting To Production #
###########################

flux create source git \
    devops-toolkit-production \
    --url https://github.com/vfarcic/devops-toolkit \
    --namespace flux-production \
    --branch master \
    --interval 30s \
    --export \
    | tee apps/devops-toolkit-source.yaml

mkdir values

echo "image:
    tag: 2.9.17
ingress:
    host: devops-toolkit.$INGRESS_HOST.xip.io" \
    | tee values/devops-toolkit.yaml

flux create helmrelease \
    devops-toolkit-production \
    --source GitRepository/devops-toolkit-production \
    --values values/devops-toolkit.yaml \
    --chart "helm" \
    --namespace flux-production \
    --target-namespace production \
    --interval 30s \
    --export \
    | tee apps/devops-toolkit-release.yaml

git add .

git commit -m "Initial commit"

git push

watch flux --namespace flux-production \
    get helmreleases

kubectl --namespace production \
    get pods

open http://devops-toolkit.$INGRESS_HOST.xip.io

#########################
# Destroying Everything #
#########################

minikube delete

cd ..

cd flux-staging

gh repo view --web

# Delete the repo

cd ..

rm -rf flux-staging

cd flux-production

gh repo view --web

# Delete the repo

cd ..

rm -rf flux-production