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fix: add upgrade errata for arm64/zboot kernels

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Fixes #8854

Talos 1.8.0 instroduces EFI ZBoot compression, and kexec from 1.7.0 to
compressed kernel doesn't work.

Signed-off-by: Andrey Smirnov <andrey.smirnov@siderolabs.com>
This commit is contained in:
Andrey Smirnov 2024-06-03 20:10:24 +04:00
parent 9a23d846c1
commit 82d9cd3229
No known key found for this signature in database
GPG Key ID: FE042E3D4085A811
2 changed files with 37 additions and 9 deletions
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44
cmd/installer/pkg/install/errata.go
View File

@ -5,10 +5,14 @@
package install
import (
"bytes"
"compress/gzip"
"context"
"fmt"
"io"
"log"
"os"
"runtime"
"time"
"google.golang.org/grpc"
@ -23,17 +27,41 @@ import (
"github.com/siderolabs/talos/pkg/machinery/role"
)
// errataBTF handles the case when kexec from pre-BTF kernel to BTF enabled kernel always fails.
//
// This applies to upgrades of Talos < 1.3.0 to Talos >= 1.3.0.
func errataBTF() {
_, err := os.Stat("/sys/kernel/btf/vmlinux")
if err == nil {
// BTF is enabled, nothing to do
// errataArm64ZBoot handles the case when upgrading from Talos < 1.8.0 on arm64 to compressed kernel.
func errataArm64ZBoot() {
if runtime.GOARCH != "arm64" {
return
}
log.Printf("disabling kexec due to upgrade to the BTF enabled kernel")
oldConfig, err := os.OpenFile("/proc/config.gz", os.O_RDONLY, 0)
if err != nil {
log.Printf("failed to open /proc/config.gz: %s", err)
return
}
defer oldConfig.Close() //nolint:errcheck
r, err := gzip.NewReader(oldConfig)
if err != nil {
log.Printf("failed to read /proc/config.gz: %s", err)
return
}
contents, err := io.ReadAll(r)
if err != nil {
log.Printf("failed to read /proc/config.gz: %s", err)
return
}
if bytes.Contains(contents, []byte("CONFIG_ARM64_ZBOOT=y")) {
// nothing to do
return
}
log.Printf("disabling kexec due to upgrade to the compressed kernel")
if err = pkgkernel.WriteParam(&kernel.Param{
Key: "proc.sys.kernel.kexec_load_disabled",

2
cmd/installer/pkg/install/install.go
View File

@ -228,7 +228,7 @@ func NewInstaller(ctx context.Context, cmdline *procfs.Cmdline, mode Mode, opts
//
//nolint:gocyclo,cyclop
func (i *Installer) Install(ctx context.Context, mode Mode) (err error) {
errataBTF()
errataArm64ZBoot()
if mode == ModeUpgrade {
if err = i.errataNetIfnames(); err != nil {