hack: for kernel, use a pre-built 6.5 mainline build from some ubuntu…

… website

In a local experiment, bpftrace kprobe:vfs_write works with it.

https://kernel.ubuntu.com/mainline/v6.5.11/

.gitignore

@@ -25,5 +25,7 @@ testbin/*
 
 *.qcow2
 neonvm/hack/vmlinuz
+linux-image-unsigned-6.5.11-060511-generic_6.5.11-060511.202311151304_amd64
+linux-image-unsigned-6.5.11-060511-generic_6.5.11-060511.202311151304_amd64.deb
 
 rendered_manifests

Makefile

@@ -239,14 +239,12 @@ endif
 .PHONY: kernel
 kernel: ## Build linux kernel.
 	rm -f neonvm/hack/vmlinuz
-	docker buildx build \
-		--build-arg KERNEL_VERSION=$(VM_KERNEL_VERSION) \
-		--output type=local,dest=neonvm/hack/ \
-		--platform linux/amd64 \
-		--pull \
-		--no-cache \
-		--file neonvm/hack/Dockerfile.kernel-builder \
-		neonvm/hack
+	rm -f linux-image-unsigned-6.5.11-060511-generic_6.5.11-060511.202311151304_amd64.deb
+	rm -rf linux-image-unsigned-6.5.11-060511-generic_6.5.11-060511.202311151304_amd64
+	curl -o linux-image-unsigned-6.5.11-060511-generic_6.5.11-060511.202311151304_amd64.deb  https://kernel.ubuntu.com/mainline/v6.5.11/amd64/linux-image-unsigned-6.5.11-060511-generic_6.5.11-060511.202311151304_amd64.deb
+	mkdir linux-image-unsigned-6.5.11-060511-generic_6.5.11-060511.202311151304_amd64
+	dpkg-deb -x linux-image-unsigned-6.5.11-060511-generic_6.5.11-060511.202311151304_amd64.deb linux-image-unsigned-6.5.11-060511-generic_6.5.11-060511.202311151304_amd64
+	cp linux-image-unsigned-6.5.11-060511-generic_6.5.11-060511.202311151304_amd64/boot/vmlinuz-6.5.11-060511-generic neonvm/hack/vmlinuz
 
 .PHONY: check-local-context
 check-local-context: ## Asserts that the current kubectl context is pointing at k3d or kind, to avoid accidentally applying to prod