The code is in the 01 folder

1. We'll use an official docker image with the persistent tag (1.19.6) as our source image
   • Because it is a new solution and we want our image footprint to be as small as we can. we'll use the latest alpine based image
2. Create index.html with DATE/TIME settings
3. Running nginx as a non-root user
   • Create an nginx.conf file and copy it to the Target image
   • Change Listener port from 80 => 8080 in default.conf file (this because we want to run as a not-root user (in our case nginx))
   • For the healthcheck (will be used in Liveness/Readiness probes) we'll expose /healthz path in default.conf file
   • Change docker image context from root to nginx user (so user which attach to container will be attached as user with limited permissions)

Docker build instructions:

docker login
docker build -t adamkpn/nginx-datetime:1.0.1 .
docker push adamkpn/nginx-datetime:1.0.1

The code is in the 03 folder

1. The solution contains two environments, qa and production
2. qa example:

# Bootstrap k3d cluster (this will also expose Ingress on ports 80/443) 
k3d cluster create \
--agents 2 \
--port "80:80@loadbalancer" \
--port "443:443@loadbalancer"

# Create qa namespace
kubectl create ns qa

# Switch to qa namespace
kubectl config set-context $(kubectl config current-context) --namespace qa

# Navigate into the 03/_manifests file
cd 03/_manifests

# Deploy the manifest by running:
kustomize build qa/base | kaf -

# This will deploy the following resources:
- Deployment
- Service
- Ingress

3. Add 127.0.0.1 datetime-qa.example.com record if you want to test the service with the ingress edpoint.
   • To test, open the browser and navigate to http://datetime-qa.example.com/ or https://datetime-qa.example.com/
4. If you want to test the service Internally from the Kubernetes cluster, run the following command:

kubectl run curl -it --rm --restart=Never --image curlimages/curl -- datetime

5. You can repeat the process in an additional namespace production

• In this case the Ingress Hosts will have name datetime-production.example.com

The code is in the 04 folder

• this part is not completed yet, will be updated...