Prepare next release with support for OpenShift deployment

[lhotari]

This is an issue to track the tasks for preparing the release with support for OpenShift deployment

Tasks

• [x] Publish docker image for datastax/burnell
• [ ] Update datastax/burnell docker image tag in values.yaml
• [x] Publish docker image for datastax/pulsar-heartbeat
• [ ] Update datastax/pulsar-heartbeat docker image tag in values.yaml
• [x] Publish docker image for datastax/pulsar-admin-console
• [ ] Update pulsar-admin-console docker image tag and make deployment to support rootless image - update helm-chart-sources/pulsar/templates/admin-console/pulsar-admin-console-deployment.yaml: /root/dashboard/dist/config-override.js -> /home/appuser/dashboard/dist/config-override.js
• [ ] Add documentation for OpenShift deployment
• [ ] Add tests for kube-prometheus-stack upgrade to 16.x.x and merge #22 after tests exist
• [ ] Test OpenShift deployment with TLS
• [ ] Add documentation for setting up TLS with OpenShift
• [ ] Test OpenShift monitoring integration where the built-in OpenShift Prometheus operator is used
• [ ] Add documentation for OpenShift monitoring setup

[lhotari]

There's an experiment branch for OpenShift deployment support.

Experiment instructions.

checking out changes:

git clone -b lh-openshift-experiment-2021-07-09 https://github.com/lhotari/datastax-pulsar-helm-chart
cd datastax-pulsar-helm-chart

This experiment branch will become obsolete after the next release, since it will include the required changes for supporting OpenShift deployment.