Add support for commands/args to bootstrap containers

[snowzach]

What I'd like:
I want to be able to run a bootstrap container but also provide commands/args to it. Really what I would like it is to be able to provide a script somehow. I want to run a bootstrap container with a script to provision local NVME disks but with specific mount options and additional arguments to the mkfs command. I could try to do this with a bootstrap container but I really don't want to create a bootstrap container when all I really need a script. Plus I need to use a private non-ECR repo to host the container image and getting credentials in there for it is also a pain. I can't just put the credentials in the clear in my karpenter provisioner and I'm not sure how I could get credentials from say, a Kubernetes secret into the configuration of bottle rocket via apiclient or something.

[koooosh]

Hey @snowzach , thanks for raising this concern. I agree at the moment it is cumbersome, but we are working on simplifying this process.

Currently, my recommendation would be:

• If you need to run a script, as you already stated, you can use our current bootstrap containers like so
• Regarding getting credentials into Bottlerocket config, consider using the schnauzer api as described here

[snowzach]

I will give that a shot. Thanks for the feedback!