Helm Charts

Owned by Frederik Mogensen (Unlicensed)
Last updated: 22-11-2023 by John Schneider
1 min read

A helm chart is needed for installing an application on the eHealth Platform in a docker container ( https://helm.sh/docs/developing_charts/ ).

This helm chart will be supplied by the Platform and will among other things define:

  • Containers

    • How to deploy a container to the Kubernetes environment

    • How to monitor if the container is ready to receive requests and if it is still alive

    • Which ports to send requests to

    • How much resources the container is expected to use, and how much it is allowed to use in total

  • Service Discovery

    • Which DNS name to reach the application on (internally on the cluster)

    • Which version of the application to send requests to

  • Ingress

    • Which DNS name and path to reach the application from the internet (if any)

    • Which port to receive requests on

    • Rewrite paths if needed

Configuration

The chart can be configured with a values file in yaml format. This file can be used to override the default configuration from the chart or to enable/disable features in the chart.

The values in the values file are dependent on the chart. But an example could be the following:

image: "my-new-service" imageTag: "v1.0.2" component: "my-new-service" appVersion: "1.0.0" containerPort: 80 ingress: hostname: myservice.$ENV_BASEURL livenessProbe: httpPath: "/" readinessProbe: httpPath: "/"


See also