iso: Enable BTF debug symbols to support eBPF tooling

Makefile

@@ -24,7 +24,7 @@ KIC_VERSION ?= $(shell grep -E "Version =" pkg/drivers/kic/types.go | cut -d \"
 HUGO_VERSION ?= $(shell grep -E "HUGO_VERSION = \"" netlify.toml | cut -d \" -f2)
 
 # Default to .0 for higher cache hit rates, as build increments typically don't require new ISO versions
-ISO_VERSION ?= v1.37.0-1761414747-21797
+ISO_VERSION ?= v1.37.0-1761658712-21800
 
 # Dashes are valid in semver, but not Linux packaging. Use ~ to delimit alpha/beta
 DEB_VERSION ?= $(subst -,~,$(RAW_VERSION))

deploy/iso/minikube-iso/board/minikube/aarch64/linux_aarch64_defconfig

@@ -947,7 +947,7 @@ CONFIG_CMA_SIZE_MBYTES=32
 CONFIG_PRINTK_TIME=y
 CONFIG_DEBUG_KERNEL=y
 CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
-CONFIG_DEBUG_INFO_REDUCED=y
+CONFIG_DEBUG_INFO_BTF=y
 CONFIG_MAGIC_SYSRQ=y
 CONFIG_DEBUG_FS=y
 # CONFIG_SCHED_DEBUG is not set

deploy/iso/minikube-iso/board/minikube/x86_64/linux_x86_64_defconfig

@@ -502,13 +502,17 @@ CONFIG_CRYPTO_USER_API_SKCIPHER=y
 CONFIG_CRYPTO_AES_NI_INTEL=y
 CONFIG_PRINTK_TIME=y
 CONFIG_DEBUG_KERNEL=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
+CONFIG_DEBUG_INFO_BTF=y
 CONFIG_MAGIC_SYSRQ=y
 CONFIG_DEBUG_STACK_USAGE=y
 # CONFIG_SCHED_DEBUG is not set
 CONFIG_SCHEDSTATS=y
 CONFIG_FUNCTION_TRACER=y
 CONFIG_FTRACE_SYSCALLS=y
 CONFIG_BLK_DEV_IO_TRACE=y
+CONFIG_BPF_KPROBE_OVERRIDE=y
 CONFIG_PROVIDE_OHCI1394_DMA_INIT=y
 CONFIG_EARLY_PRINTK_DBGP=y
 CONFIG_DEBUG_BOOT_PARAMS=y
+CONFIG_FUNCTION_ERROR_INJECTION=y

pkg/minikube/download/iso.go

@@ -41,7 +41,7 @@ const fileScheme = "file"
 // DefaultISOURLs returns a list of ISO URL's to consult by default, in priority order
 func DefaultISOURLs() []string {
 	v := version.GetISOVersion()
-	isoBucket := "minikube-builds/iso/21797"
+	isoBucket := "minikube-builds/iso/21800"
 
 	return []string{
 		fmt.Sprintf("https://storage.googleapis.com/%s/minikube-%s-%s.iso", isoBucket, v, runtime.GOARCH),

test/integration/iso_test.go

@@ -23,6 +23,7 @@ import (
 	"fmt"
 	"os/exec"
 	"runtime"
+	"strings"
 	"testing"
 
 	"k8s.io/minikube/pkg/minikube/vmpath"
@@ -99,4 +100,17 @@ func TestISOImage(t *testing.T) {
 			})
 		}
 	})
+
+	t.Run("eBPFSupport", func(t *testing.T) {
+		// Ensure that BTF type information is available (https://github.com/kubernetes/minikube/issues/21788)
+		btfFile := "/sys/kernel/btf/vmlinux"
+		rr, err := Run(t, exec.CommandContext(ctx, Target(), "-p", profile, "ssh", fmt.Sprintf("test -f %s && echo 'OK' || echo 'NOT FOUND'", btfFile)))
+		if err != nil {
+			t.Errorf("failed to verify existence of %q file: args %q: %v", btfFile, rr.Command(), err)
+		}
+
+		if !strings.Contains(rr.Stdout.String(), "OK") {
+			t.Errorf("expected file %q to exist, but it does not. BTF types are required for CO-RE eBPF programs; set CONFIG_DEBUG_INFO_BTF in kernel configuration.", btfFile)
+		}
+	})
 }