04-Creating-Staging-Overlays.md

Creating Staging Overlays

Verify you are working in the staging context

$ kubectl config current-context
staging

A namespace is required before creating a Kustomization.

kubectl create ns instavote

Create Overlay for Staging

Move to isnstavote repositry and copy the contents from dev to staging

cd instavote
cp -r deploy/vote/dev deploy/vote/staging
# Update the replicas to 8
sed -i '' -E "s@replicas:.*@replicas: 8@g" deploy/vote/staging/deployment.yaml

Commit the changes and push them to the remote

git add deploy
git commit -m "feat: Add Staging Overlay for Vote application"
git push origin HEAD:refs/heads/main

Add the customization for the Staging environment

First we need to add the Sources and Kustomizations to the new environment

cd flux-infra
cp clusters/dev/redis-dev-kustomization.yaml clusters/staging/redis-staging-kustomization.yaml
cp clusters/dev/vote-dev-kustomization.yaml clusters/staging/vote-staging-kustomization.yaml
cp clusters/dev/instavote-gitrepository.yaml clusters/staging/instavote-gitrepository.yaml

# Replace occurrences from dev -> staging
find clusters/staging/*.yaml -exec sed -I '' 's/dev/staging/g' {} \;

# Commit and publish the changes
git add clusters/staging
git commit -m "feat: Add staging resources"
git push origin HEAD:refs/heads/main

Reconcile the system and see the components deployed

Now that the sorces have been submitted the components will be automatically reconciled

# Optionally you can trigger the updates
flux reconcile source git flux-system

Verify the componets get deployed

flux get all

# Check the Kubernetes resources
kubectl get all -n instavote