Add NATS Streaming Operator Helm Chart

[Starefossen]

This Pull Request adds a Helm chart for the NATS Streaming Operator similar to the NATS Operator (https://github.com/nats-io/nats-operator/tree/master/helm/nats-operator)

All suggestions, comments and improvements are welcome. Also thinking if we should submit this to the official chart repository to make it easy to install without having to git clone the repo.

TODO:

• Document values.yaml in README.md
• Uodate NOTES.txt

OTHER:

• liveness and readiness for NATS Streaming Operator deployment (blocked on Enable monitoring #31)
• Cluster Scoped install similar to the NATS Operator?
• Add nats-operator as a dependency to auto-install NATS Operator?

[philicious]

I like having a Helm Chart. thx @Starefossen !. Will try it out soon as I need to deploy and manage a nats-streaming cluster one way or another

[tegk]

Will be this merged?

[omenv]

I think the better way to use:

namespace: {{.Release.Namespace}}

[omenv]

nats-streaming-operator does not have 8080 port into it's pod. So I had a problem with this livenessprobe.

[omenv]

Maybe it is a good way to add a new brunch for the helm-chart preparing.
Also good to see options for persistence/SQL.

[dellintosh]

@Starefossen I have an open PR for your fork, if you get a moment to merge that in. It addresses a few of the concerns brought up, and I'm hoping that we can get this merged in.

So far, it addresses:

...
TODO:

• Document values.yaml in README.md
• Update NOTES.txt

OTHER:

• liveness and readiness for NATS Streaming Operator deployment (blocked on Enable monitoring #31)
• Cluster Scoped install similar to the NATS Operator?
• Add nats-operator as a dependency to auto-install NATS Operator?

• The dependencies require a Helm Chart Repository for the NATS Operator. Since there is no Chart Repo for that (it's just pulling from git when installing the chart), this is blocked by that. I'll see if I can take a shot at getting that set up though, so we can make sure that NATS Operator is set up as a dependency.

Starefossen#1

[wallyqs]

@dellintosh thanks for the contribution, since there are some adopting the helm chart already I think we should merge as is and you can send PR here if you want.

[wallyqs]

Thanks a lot @Starefossen for the PR, sorry for the delay in merging... 🙇