999-crossplane-flux.sh

# Source: https://gist.github.com/0c56f8b8a820198ada44123fa1bf4b60

################################################################
# How To Apply GitOps For Everything Using Crossplane And Flux #
# https://youtu.be/dunU2ABitMA                                 #
################################################################

# Additional Info:
# - eksctl - How to Create and Manage AWS EKS clusters: https://youtu.be/pNECqaxyewQ
# - Flux CD v2 With GitOps Toolkit - Kubernetes Deployment And Sync Mechanism: https://youtu.be/R6OeIgb7lUI
# - How To Shift Left Infrastructure Management Using Crossplane Compositions: https://youtu.be/AtbS1u2j7po
# - How To Manage Applications With Databases Using Helm, Crossplane, And Schemahero: https://youtu.be/lZpKF1B80dU

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

# Replace `[...]` with the GitHub organization or user
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=[...]

############################
# Setup Management Cluster #
############################

# Replace `[...]` with your access key ID`
export AWS_ACCESS_KEY_ID=[...]

# Replace `[...]` with your secret access key
export AWS_SECRET_ACCESS_KEY=[...]

eksctl create cluster \
    --name management \
    --region us-east-1

kubectl create namespace crossplane-system

kubectl create namespace dev

kubectl create namespace clusters

#############
# Setup AWS #
#############

echo "[default]
aws_access_key_id = $AWS_ACCESS_KEY_ID
aws_secret_access_key = $AWS_SECRET_ACCESS_KEY
" >aws-creds.conf

kubectl --namespace crossplane-system \
    create secret generic aws-creds \
    --from-file creds=./aws-creds.conf

##############
# Setup Flux #
##############

flux bootstrap github \
    --owner $GITHUB_ORG \
    --repository crossplane-flux \
    --branch main \
    --path infra \
    --personal $GITHUB_PERSONAL

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

cd crossplane-flux

echo "/kubeconfig.yaml
/aws-creds.conf" \
    | tee .gitignore

####################
# Setup Crossplane #
####################

mkdir infra/crossplane-system

flux create source helm crossplane \
    --interval 1h \
    --url https://charts.crossplane.io/stable \
    --export \
    | tee infra/crossplane-system/source.yaml

flux create helmrelease crossplane \
    --interval 1h \
    --release-name crossplane \
    --target-namespace crossplane-system \
    --create-target-namespace \
    --source HelmRepository/crossplane \
    --chart crossplane \
    --chart-version 1.6.4 \
    --crds CreateReplace \
    --export \
    | tee infra/crossplane-system/release.yaml

git add .

git commit -m "Crossplane"

git push

kubectl --namespace flux-system \
  get helmreleases,kustomizations

# Wait for a few moments for everything to sync

curl -o infra/crossplane-system/providers.yaml \
    https://gist.githubusercontent.com/vfarcic/477536cd79893a06cf805427fa6d6b7c/raw

git add .

git commit -m "Crossplane"

git push

kubectl --namespace flux-system \
  get helmreleases,kustomizations

kubectl get pkgrev

# Wait until all the packages are healthy

curl -o infra/crossplane-system/provider-config-aws.yaml \
        https://raw.githubusercontent.com/vfarcic/devops-toolkit-crossplane/master/crossplane-config/provider-config-aws.yaml

git add .

git commit -m "Crossplane"

git push

kubectl --namespace flux-system \
    get helmreleases,kustomizations

export SA=$(kubectl \
    --namespace crossplane-system \
    get serviceaccount \
    --output name \
    | grep provider-helm \
    | sed -e 's|serviceaccount\/|crossplane-system:|g')

kubectl create clusterrolebinding \
    provider-helm-admin-binding \
    --clusterrole cluster-admin \
    --serviceaccount="${SA}"

######################
# Production Cluster #
######################

# Created a management cluster and installed Flux and Crossplane

mkdir infra/clusters

echo "apiVersion: devopstoolkitseries.com/v1alpha1
kind: ClusterClaim
metadata:
  name: production
  namespace: flux-system
spec:
  id: production
  compositionSelector:
    matchLabels:
      provider: aws
      cluster: eks
  parameters:
    nodeSize: small
    minNodeCount: 3
  writeConnectionSecretToRef:
    name: production-cluster" \
    | tee infra/clusters/production.yaml

git add .

git commit -m "Cluster"

git push

kubectl --namespace flux-system \
  get clusterclaims

###########################
# Development Environment #
###########################

mkdir dev-apps

echo "apiVersion: devopstoolkitseries.com/v1alpha1
kind: AppClaim
metadata:
  name: silly-demo
  namespace: dev
spec:
  id: silly-demo-dev
  compositionSelector:
    matchLabels:
      type: backend-db
      location: local
  parameters:
    namespace: dev
    image: vfarcic/sql-demo:0.1.10
    port: 8080
    host: dev.backend.acme.com
    
---

apiVersion: devopstoolkitseries.com/v1alpha1
kind: SQLClaim
metadata:
  name: silly-demo
  namespace: dev
spec:
  id: silly-demo-dev
  compositionSelector:
    matchLabels:
      provider: local-k8s
      db: postgresql
  parameters:
    version: \"13.4\"
    size: small
    namespace: dev
  writeConnectionSecretToRef:
    name: silly-demo-dev" \
    | tee dev-apps/backend.yaml

git add .

git commit -m "Backend"

git push

flux create kustomization dev-apps \
    --source GitRepository/flux-system \
    --path dev-apps \
    --prune true \
    --interval 1m

kubectl --namespace dev \
    get appclaims,sqlclaims

kubectl --namespace dev \
    get all,ingresses,secrets

######################
# Production Cluster #
######################

kubectl get managed

kubectl get clusters

kubectl --namespace flux-system \
  get clusterclaims

# Wait until the claim is ready.

kubectl --namespace crossplane-system \
    get secret production-cluster \
    --output jsonpath="{.data.kubeconfig}" \
    | base64 -d >kubeconfig.yaml

# The credentials are temporary so you might need to recreate kubeconfig later on

kubectl --kubeconfig kubeconfig.yaml \
    get nodes

echo "[default]
aws_access_key_id = $AWS_ACCESS_KEY_ID
aws_secret_access_key = $AWS_SECRET_ACCESS_KEY
" >aws-creds.conf

kubectl --kubeconfig kubeconfig.yaml \
    --namespace crossplane-system \
    create secret generic aws-creds \
    --from-file creds=./aws-creds.conf

##########################
# Production Environment #
##########################

mkdir prod-apps

echo "apiVersion: devopstoolkitseries.com/v1alpha1
kind: AppClaim
metadata:
  name: silly-demo
  namespace: production
spec:
  id: silly-demo
  compositionSelector:
    matchLabels:
      type: backend-db
      location: local
  parameters:
    namespace: production
    image: vfarcic/sql-demo:0.1.10
    port: 8080
    host: devops-toolkit.127.0.0.1.nip.io

---

apiVersion: devopstoolkitseries.com/v1alpha1
kind: SQLClaim
metadata:
  name: silly-demo
  namespace: production
spec:
  id: silly-demo
  compositionSelector:
    matchLabels:
      provider: aws
      db: postgresql
  parameters:
    version: \"13.4\"
    size: small
    namespace: production
  writeConnectionSecretToRef:
    name: silly-demo" \
    | tee prod-apps/backend.yaml

git add .

git commit -m "Backend"

git push

mkdir -p tmp

flux create kustomization prod-apps \
    --source GitRepository/flux-system \
    --path prod-apps \
    --prune true \
    --interval 1m \
    --export \
    | tee tmp/prod-apps.yaml

# Edit the file and set `spec.kubeConfig.secretRef.name` to `production-cluster`

kubectl apply \
    --filename tmp/prod-apps.yaml

kubectl --kubeconfig kubeconfig.yaml \
    --namespace production \
    get appclaims,sqlclaims

kubectl --kubeconfig kubeconfig.yaml \
    --namespace production \
    get all,ingresses,secrets

kubectl --kubeconfig kubeconfig.yaml \
    get managed

kubectl --kubeconfig kubeconfig.yaml \
    --namespace production \
    get pods

###########
# Destroy #
###########

rm -rf delete dev-apps/*.yaml

touch dev-apps/dummy

rm -rf delete prod-apps/*.yaml

touch prod-apps/dummy

git add .

git commit -m "Remove apps"

git push

kubectl --kubeconfig kubeconfig.yaml \
    get managed

# Repeat the previous command until all the `aws` resources are deleted

kubectl --kubeconfig kubeconfig.yaml \
    --namespace ingress-nginx \
    delete service production-ingress-ingress-nginx-controller

rm -rf infra/clusters/*.yaml

git add .

git commit -m "Destroy"

git push

kubectl get managed

# Repeat the previous command until all the `aws` resources are deleted

eksctl delete cluster \
    --name management \
    --region us-east-1

gh repo view --web

# Delete the repo

cd ..

rm -rf crossplane-flux