hub-system-charts

This repository is a helm chart that contains all the charts that are used by provisioned Hub clusters.

Charts

The charts directory contains forked charts that require edits beyond the scope that their values originally provided. If at all possible, we should avoid forking charts and should instead the values should be updated to provide the desired functionality in templates. However, if that is not possible, the forked chart should be kept as close to the original as possible.

To package all these charts, run ./scripts/package.sh. This will package the charts into the docs directory so long as the script has been updated to be aware of any new charts.

Istio

For the purposes of using istio withing provisioned clusters, we have forked the upstream Istiod chart and setup:

A second Istiod Deployment called istiod-master with hardcoded nodeAffinity to run only on master nodes.
Hardcoded nodeAffinity on the other istiod Deployment to run only on worker nodes.
A second HPA and PDB to target the istiod-master Deployment.
A new Service in the istio-system namespace called istiod-remote that only selects pods from the istiod-master Deployment.
The MutatingWebhookConfiguration to send requests to the istiod-remote Service only.

These edits were not possible outside of directly editing the chart. The upstream chart's values would not allow us to do this so we had to fork it.

Templates

The templates directory contains the k3s HelmChart resources. These deploy the charts packaged from the charts directory as well as any other upstream charts. They can be controlled to be deployed or not via the values.yaml file.

Docs

The docs directory contains the packaged helm charts. They are served via GitHub pages at https://acorn-io.github.io/hub-system-charts/{chart}.tgz. While they can be installed individually, they are intended to be installed all together via the aggregate chart defined by Chart.yaml.

Currently, these include:

acorn-io / hub-system-charts Goto Github PK