mirror of
https://github.com/siderolabs/talos.git
synced 2025-10-11 07:31:18 +02:00
1df841bb54
Use a global instance, handle loading/saving META in global context.
Deprecate legacy syslinux ADV, provide an easier interface for
consumers.
Expose META as resources.
Fix the bootloader revert process (it was completely broken for quite a
while :sad:).
This is a first step which mostly does preparation work, real changes
will come in the next PRs:
* add APIs to write to META
* consume META keys for platform network config for `metal`
* custom key for URL `${code}`
Signed-off-by: Andrey Smirnov <andrey.smirnov@talos-systems.com>
115 lines
2.3 KiB
Go
115 lines
2.3 KiB
Go
// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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package main
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import (
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"context"
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"log"
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"os"
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"github.com/siderolabs/go-blockdevice/blockdevice/probe"
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"github.com/siderolabs/talos/internal/app/machined/pkg/runtime/v1alpha1/bootloader/grub"
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"github.com/siderolabs/talos/internal/pkg/meta"
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"github.com/siderolabs/talos/internal/pkg/mount"
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"github.com/siderolabs/talos/pkg/machinery/constants"
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)
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func revertBootloader() {
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if err := revertBootloadInternal(); err != nil {
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log.Printf("failed to revert bootloader: %s", err)
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}
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}
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//nolint:gocyclo
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func revertBootloadInternal() error {
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metaState, err := meta.New(context.Background(), nil)
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if err != nil {
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if os.IsNotExist(err) {
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// no META, no way to revert
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return nil
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}
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return err
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}
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label, ok := metaState.ReadTag(meta.Upgrade)
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if !ok {
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return nil
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}
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if label == "" {
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if _, err = metaState.DeleteTag(context.Background(), meta.Upgrade); err != nil {
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return err
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}
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return metaState.Flush()
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}
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log.Printf("reverting failed upgrade, switching to %q", label)
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// attempt to mount BOOT partition directly without using other code paths, as they rely on Runtime
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dev, err := probe.GetDevWithPartitionName(constants.BootPartitionLabel)
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if os.IsNotExist(err) {
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// no BOOT partition???
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return nil
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}
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if err != nil {
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return err
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}
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defer dev.Close() //nolint:errcheck
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mp, err := mount.SystemMountPointForLabel(dev.BlockDevice, constants.BootPartitionLabel)
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if err != nil {
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return err
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}
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if mp == nil {
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return nil
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}
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alreadyMounted, err := mp.IsMounted()
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if err != nil {
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return err
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}
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if !alreadyMounted {
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if err = mp.Mount(); err != nil {
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return err
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}
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defer mp.Unmount() //nolint:errcheck
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}
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conf, err := grub.Read(grub.ConfigPath)
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if err != nil {
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return err
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}
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if conf == nil {
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return nil
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}
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bootEntry, err := grub.ParseBootLabel(label)
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if err != nil {
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return err
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}
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if conf.Default != bootEntry {
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conf.Default, conf.Fallback = bootEntry, conf.Default
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if err = conf.Write(grub.ConfigPath); err != nil {
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return err
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}
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}
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if _, err = metaState.DeleteTag(context.Background(), meta.Upgrade); err != nil {
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return err
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}
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return metaState.Flush()
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}
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