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I can't reproduce this @Karthik-K-N. Can you specify your Tilt version, the commit you've used and your tilt-settings.yaml file?

I can't reproduce this @Karthik-K-N. Can you specify your Tilt version, the commit you've used and your tilt-settings.yaml file?

Sure, here it is

[root@karthik-vm cluster-api]# tilt version
v0.35.0, built 2025-06-13


[root@karthik-vm cluster-api]# git log --oneline
c28b41336 (HEAD -> main, origin/main, origin/HEAD) Merge pull request #12382 from mboersma/fix-capz-link
59b0f3fec Merge pull request #12357 from Tomy2e/scaleway
4f54ba085 Fix broken link to CAPZ prerequisites
1efdb87b2 ⚠️ Drop unnecessary fields from contract-versioned object references (#12356)

[root@karthik-vm cluster-api]# tilt up --stream=true
Tilt started on http://localhost:10350/
v0.35.0, built 2025-06-13
WARNING: Error loading config file: /root/.docker/config.json: : read /root/.docker/config.json: is a directory
WARNING: Error loading config file: /root/.docker/config.json: : read /root/.docker/config.json: is a directory

Initial Build
Loading Tiltfile at: /root/cluster-api/Tiltfile
local: command -v kubectl || true
local: docker version || podman version
local: go env GOOS
 → linux
local: go env GOARCH
 → amd64
local: kubectl get cm -n kube-public local-registry-hosting || true
ERROR: Traceback (most recent call last):
  /root/cluster-api/Tiltfile:46:13: in <toplevel>
Error in fail: default_registry is required when not using a local registry, please add it to your tilt-settings.yaml/json


[root@karthik-vm cluster-api]# cat tilt-settings.yaml
enable_providers:
- kubevirt
- kubeadm-bootstrap
- kubeadm-control-plane
provider_repos:
# Path to a local clone of CAPK (replace with actual path)
- ../cluster-api-provider-kubevirt
kustomize_substitutions:
  # CAPK needs access to the containerd socket (replace with actual path)
  CRI_PATH: "/var/run/containerd/containerd.sock"
  KUBERNETES_VERSION: "v1.30.1"
  # An example - replace with an appropriate container disk image for the desired k8s version
  NODE_VM_IMAGE_TEMPLATE: "quay.io/capk/ubuntu-2204-container-disk:v1.30.1"
# Allow deploying CAPK workload clusters from the Tilt UI (optional)
template_dirs:
  kubevirt:
  - ../cluster-api-provider-kubevirt/templates

Looks like the error you're getting is because there is some problem with the wiring of the local container registry:

When I follow your instructions I do indeed get the error.

Please try the following:

make kind-cluster-kubevirt
make tilt-up

Works for me.

Looks like the error you're getting is because there is some problem with the wiring of the local container registry:

cluster-api/Tiltfile

Lines 43 to 46 in 4852b67

	usingLocalRegistry = str(local(kubectl_cmd + " get cm -n kube-public local-registry-hosting || true", quiet = True))
	if not usingLocalRegistry:
	if settings.get("default_registry", "") == "":
	fail("default_registry is required when not using a local registry, please add it to your tilt-settings.yaml/json")

When I follow your instructions I do indeed get the error.

Please try the following:

make kind-cluster-kubevirt
make tilt-up

Works for me.

True that, but even with it I hit the issue. Even I can see the result

# kubectl get cm -n kube-public local-registry-hosting
NAME                     DATA   AGE
local-registry-hosting   1      31m

Not sure what should I do with this PR, should I close it?

Looks like the error you're getting is because there is some problem with the wiring of the local container registry:

cluster-api/Tiltfile

Lines 43 to 46 in 4852b67

	usingLocalRegistry = str(local(kubectl_cmd + " get cm -n kube-public local-registry-hosting || true", quiet = True))
	if not usingLocalRegistry:
	if settings.get("default_registry", "") == "":
	fail("default_registry is required when not using a local registry, please add it to your tilt-settings.yaml/json")

When I follow your instructions I do indeed get the error.
Please try the following:

make kind-cluster-kubevirt
make tilt-up

Works for me.

True that, but even with it I hit the issue. Even I can see the result

# kubectl get cm -n kube-public local-registry-hosting
NAME                     DATA   AGE
local-registry-hosting   1      31m

So you get an error from tilt even though you shouldn't because the ConfigMap exists?

And it looks like not everyone is getting this issue? (I don't get it with regular make tilt-up (I'm not using kube virt))

I think I wouldn't change the documentation if we don't know why it only fails in some cases. Maybe you can do some further debugging of the kubectl command that is run to check if the ConfigMap exists. Maybe there's an error there

/close

Tried just now and able to see all the controllers are up, Not sure what was causing the issue earlier, Closing this. Sorry and Thank you.

@Karthik-K-N: Closed this PR.

Perfect. All good, no worries