Kaniko step fails on Minikube with IncrementalPackager

[nicolaferraro]

Context:

• Minikube v1.4.0
• Kubernetes v1.16.0
• Knative Serving + Eventing 0.9
• Knative demo
• Deployng feed.groovy works
• Deploying splitter.groovy fails using IncrementalPackager

camel-k-kit-bm681ss85ojj9bdddrf0-builder builder {"level":"info","ts":1569489172.0693874,"logger":"camel-k.builder","msg":"step done in 0.004488 seconds","step":"github.com/apache/camel-k/pkg/builder/IncrementalPackager","phase":30,"kit":"kit-bm681ss85ojj9bdddrf0"}
camel-k-kit-bm681ss85ojj9bdddrf0-builder builder {"level":"info","ts":1569489172.069422,"logger":"camel-k.builder","msg":"executing step","step":"github.com/apache/camel-k/pkg/builder/kaniko/Publisher","phase":40,"kit":"kit-bm681ss85ojj9bdddrf0"}
camel-k-kit-bm681ss85ojj9bdddrf0-builder builder {"level":"info","ts":1569489172.0694778,"logger":"camel-k.builder","msg":"step failed with error: open /workspace/builder-713355563/package/context/Dockerfile: no such file or directory","step":"github.com/apache/camel-k/pkg/builder/kaniko/Publisher","phase":40,"kit":"kit-bm681ss85ojj9bdddrf0"}

I've tried switching to StandardPackager instead of IncrementalPackager and it seems to work. Any hint @astefanutti ?

[nicolaferraro]

I've seen some "Invalid manifest" errors that I cannot replicate. Can be that, perhaps, the new minikube/kube version ships an improved docker registry with some metadata that is not interpreted by kaniko 0.9 and we have to upgrade it?

But I can't explain why the error is in the -builder pod and not in the Kaniko one (today...).