Hello Kube demo app

A demo app that can be deployd to a Kubernetes cluster (k8s, kind, etc.). It displays a message, and also namespace, pod, node and image details.

Configuration

Variables	Required	Default Value	Description
DOCKER_IMAGE	Yes	hello-kube	Docker image name
DOCKER_IMAGE_VERSION	Yes	1.0	Docker image version
DOCKER_REGISTRY	yes	docker.io	Docker registry name
DOCKER_REGISTRY_USER	Yes	gmouchet	Docker registry user
DOCKER_REGISTRY_PASSWORD	Yes	secret	Docker registry user password
PORT_LOCAL	No	8080	The port for URL <server_fqdn>:<PORT_LOCAL>
PORT	No	8080	The port that the app listens on.
MESSAGE	No	"Hello world!"	The message displayed by the app.
RENDER_PATH_PREFIX	No	""	The path prefix to use when rendering the urls for the static assets in the handlebar templates. Must be used when app is deployed with an ingress using a backend path for traffic to app.
HANDLER_PATH_PREFIX	No	""	The path prefix to use by handlers when serving the dynamic and static assets. Note: Must be used when app is deployed with an ingress that has a backend path for traffic to the app, but which does not rewrite the backend paths to '/'.
KUBERNETES_NAMESPACE	Yes	"-"	The Kubernetes namespace that the app has been deployed to.
KUBERNETES_NODE_NAME	Yes	"-"	The name of the Kubernetes node that the app is deployed on.

The application relies on the following files for configuration and operational information.

File	Required	Information	Description
package.json	Yes	`.version`	The release version is used when the CONTAINER_IMAGE env is not provided.
info.json	Yes	`.containerImageArch`	The container image architecture is used for display. This file will be overwritten in future versions as part of the container image build process when multi-arch images are suppoted.

Multi architecture

To create a multi-architecture image, proceed as follows:

docker buildx create --use --name gmobuilder
docker buildx inspect gmobuilder --bootstrap

docker buildx build --platform linux/amd64,linux/arm64 -t gmouchet/hello-kube:latest . --push

or user script ./docker.sh build

Variables

cp .env.dist .env
vim .env

Build image

./docker.sh build-no-cache

Others actions

./docker.sh help