feat(chart): initial chart files

[ebaron]

Here is an initial Helm chart for Cryostat. It's mainly designed to quickly trial Cryostat in any Kubernetes cluster. As such, it's missing a lot of features of the operator, such as end-to-end encryption, authentication, persistent storage. Some of these should be not too difficult to add later.

It should work with a variety of network setups:

• ClusterIP services, and kubectl port-forward
• NodePort services
• LoadBalancer services
• Ingress
• Routes (on OpenShift)

I've tested it out manually using Minikube and CodeReady Containers. If new to Helm, this is a good resource to learn the basics: https://helm.sh/docs/intro/.

To install:
helm install <name> ./cryostat/

To uninstall:
helm uninstall <name>

To render the YAML files that would be created during installation:
helm template <name> ./cryostat/

The install and template commands allow you to override values to test different scenarios without modifiying the values.yaml directly, e.g. --set core.service.type=NodePort,grafana.service.type=NodePort or --set core.route.enabled=true,grafana.route.enabled=true.

Fixes: #1

[heubeck]

shall it be possible, to use an existing grafana instance as well?

[ebaron]

Not at first, but I could see that being a useful feature. I've filed #3 to make a note of this (linking to our operator since this would also be useful there).

[heubeck]

guess you'd like to remove the default comments.

[ebaron]

Definitely, thanks for the reminder!

[heubeck]

Thank you.
Will you serve this chart from a http repo, e.g. by using GH pages?

[ebaron]

Thank you. Will you serve this chart from a http repo, e.g. by using GH pages?

We still have to explore release options for this chart, but serving it on our GH page could be a good option. This PR references images from our latest development branch. Once we release our 2.1 version of Cryostat, we would like to release a Helm chart to go with it. It would also be nice if we could release a separate chart version pointing the latest development branch as well. I've created #8 to explore this further.

[heubeck]

Thank you. Will you serve this chart from a http repo, e.g. by using GH pages?

We still have to explore release options for this chart, but serving it on our GH page could be a good option. This PR references images from our latest development branch. Once we release our 2.1 version of Cryostat, we would like to release a Helm chart to go with it. It would also be nice if we could release a separate chart version pointing the latest development branch as well. I've created #8 to explore this further.

Sounds great.
A nice setup is e.g. here: https://github.com/bitnami-labs/sealed-secrets
They are creating GH releases with the packaged chart using GH actions, and host the helm repo index with GH actions.

[ebaron]

Sounds great. A nice setup is e.g. here: https://github.com/bitnami-labs/sealed-secrets They are creating GH releases with the packaged chart using GH actions, and host the helm repo index with GH actions.

Thanks for the tip, I'll take a look!