unhelpful error message bootstrapping microk8s

[Heather Lanigan]

$ ~/work/bin/juju bootstrap --build-agent microk8s mk8s
Creating Juju controller "mk8s" on microk8s/localhost
ERROR failed to bootstrap model: --build-agent when bootstrapping a k8s controller
$

Does this mean that you cannot use --build-agent when bootstraping micro8ks? I haven't been able to find documentation around this. There is no mention in `juju help bootstrap` that I can find.

[Ian Booth (wallyworld)]

The error should say "--build agent when bootstrapping a k8s controller not supported" but the "not supported" has been left off it seems.

The way to do it with microk8s is to use the make target "microk8s-operator-update".
This will make a new docker image with a build jujud and push that to the microk8s containerd registry. Because the image pull policy is PullIfNotPresent, the custom buitt, pre-cached image will be used.

The same technique applies for any k8s cluster, but the make target is oriented to microk8s.

[Anastasia (anastasia-macmood)]

The problem is that the errors were constructed using errors.NewNotSupported(...) constructor whereas it's errors.NotSupportedf(...) that appends "not supported" to error message automatically.

[Anastasia (anastasia-macmood)]

PR for develop (heading into 2.8): https://github.com/juju/juju/pull/11125