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Support lvm auto-activation as per https://man7.org/linux/man-pages/man7/lvmautoactivation.7.html. This changes from how Talos previously used to unconditionally tried to activate all volume groups to based on udev events. Fixes: #9300 Signed-off-by: Noel Georgi <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,176 @@ | ||
| // This Source Code Form is subject to the terms of the Mozilla Public | ||
| // License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| // file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
|
|
||
| package block | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "strings" | ||
|
|
||
| "github.com/cosi-project/runtime/pkg/controller" | ||
| "github.com/cosi-project/runtime/pkg/safe" | ||
| "github.com/cosi-project/runtime/pkg/state" | ||
| "github.com/hashicorp/go-multierror" | ||
| "github.com/siderolabs/gen/optional" | ||
| "github.com/siderolabs/go-cmd/pkg/cmd" | ||
| "go.uber.org/zap" | ||
|
|
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| "github.com/siderolabs/talos/pkg/machinery/constants" | ||
| "github.com/siderolabs/talos/pkg/machinery/resources/block" | ||
| runtimeres "github.com/siderolabs/talos/pkg/machinery/resources/runtime" | ||
| "github.com/siderolabs/talos/pkg/machinery/resources/v1alpha1" | ||
| ) | ||
|
|
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| // LVMActivationController activates LVM volumes when they are discovered by the block.DiscoveryController. | ||
| type LVMActivationController struct { | ||
| seenVolumes map[string]struct{} | ||
| activatedVGs map[string]struct{} | ||
| } | ||
|
|
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| // Name implements controller.Controller interface. | ||
| func (ctrl *LVMActivationController) Name() string { | ||
| return "block.LVMActivationController" | ||
| } | ||
|
|
||
| // Inputs implements controller.Controller interface. | ||
| func (ctrl *LVMActivationController) Inputs() []controller.Input { | ||
| return []controller.Input{ | ||
| { | ||
| Namespace: v1alpha1.NamespaceName, | ||
| Type: runtimeres.MountStatusType, | ||
| ID: optional.Some(constants.EphemeralPartitionLabel), | ||
| Kind: controller.InputWeak, | ||
| }, | ||
| { | ||
| Namespace: block.NamespaceName, | ||
| Type: block.DiscoveredVolumeType, | ||
| Kind: controller.InputWeak, | ||
| }, | ||
| } | ||
| } | ||
|
|
||
| // Outputs implements controller.Controller interface. | ||
| func (ctrl *LVMActivationController) Outputs() []controller.Output { | ||
| return nil | ||
| } | ||
|
|
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| // Run implements controller.Controller interface. | ||
| // | ||
| //nolint:gocyclo | ||
| func (ctrl *LVMActivationController) Run(ctx context.Context, r controller.Runtime, logger *zap.Logger) error { | ||
| if ctrl.seenVolumes == nil { | ||
| ctrl.seenVolumes = make(map[string]struct{}) | ||
| } | ||
|
|
||
| if ctrl.activatedVGs == nil { | ||
| ctrl.activatedVGs = make(map[string]struct{}) | ||
| } | ||
|
|
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| for { | ||
| select { | ||
| case <-ctx.Done(): | ||
| return nil | ||
| case <-r.EventCh(): | ||
| } | ||
|
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| if _, err := safe.ReaderGetByID[*runtimeres.MountStatus](ctx, r, constants.EphemeralPartitionLabel); err != nil { | ||
| if state.IsNotFoundError(err) { | ||
| // wait for the mount status to be available | ||
| continue | ||
| } | ||
|
|
||
| return fmt.Errorf("failed to get mount status: %w", err) | ||
| } | ||
|
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| discoveredVolumes, err := safe.ReaderListAll[*block.DiscoveredVolume](ctx, r) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to list discovered volumes: %w", err) | ||
| } | ||
|
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| var multiErr error | ||
|
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| for iterator := discoveredVolumes.Iterator(); iterator.Next(); { | ||
| if _, ok := ctrl.seenVolumes[iterator.Value().Metadata().ID()]; ok { | ||
| continue | ||
| } | ||
|
|
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| if iterator.Value().TypedSpec().Name != "lvm2-pv" { | ||
| ctrl.seenVolumes[iterator.Value().Metadata().ID()] = struct{}{} | ||
|
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| continue | ||
| } | ||
|
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| logger.Info("checking device for LVM volume activation", zap.String("device", iterator.Value().TypedSpec().DevPath)) | ||
|
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| vgName, err := ctrl.checkVGNeedsActivation(ctx, iterator.Value().TypedSpec().DevPath) | ||
| if err != nil { | ||
| multiErr = multierror.Append(multiErr, err) | ||
|
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| continue | ||
| } | ||
|
|
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| if vgName == "" { | ||
| ctrl.seenVolumes[iterator.Value().Metadata().ID()] = struct{}{} | ||
|
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| continue | ||
| } | ||
|
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| if _, ok := ctrl.activatedVGs[vgName]; ok { | ||
| continue | ||
| } | ||
|
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| logger.Info("activating LVM volume", zap.String("name", vgName)) | ||
|
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| // activate the volume group | ||
| if _, err = cmd.RunContext(ctx, | ||
| "/sbin/lvm", | ||
| "vgchange", | ||
| "-aay", | ||
| "--autoactivation", | ||
| "event", | ||
| vgName, | ||
| ); err != nil { | ||
| return fmt.Errorf("failed to activate LVM volume %s: %w", vgName, err) | ||
| } | ||
|
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| ctrl.activatedVGs[vgName] = struct{}{} | ||
| } | ||
|
|
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| if multiErr != nil { | ||
| return multiErr | ||
| } | ||
| } | ||
| } | ||
|
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| // checkVGNeedsActivation checks if the device is part of a volume group and returns the volume group name | ||
| // if it needs to be activated, otherwise it returns an empty string. | ||
| func (ctrl *LVMActivationController) checkVGNeedsActivation(ctx context.Context, devicePath string) (string, error) { | ||
| // first we check if all associated volumes are available | ||
| // https://man7.org/linux/man-pages/man7/lvmautoactivation.7.html | ||
| stdOut, err := cmd.RunContext(ctx, | ||
| "/sbin/lvm", | ||
| "pvscan", | ||
| "--cache", | ||
| "--verbose", | ||
| "--listvg", | ||
| "--checkcomplete", | ||
| "--vgonline", | ||
| "--autoactivation", | ||
| "event", | ||
| "--udevoutput", | ||
| devicePath, | ||
| ) | ||
| if err != nil { | ||
| return "", fmt.Errorf("failed to check if LVM volume backed by device %s needs activation: %w", devicePath, err) | ||
| } | ||
|
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| if strings.HasPrefix(stdOut, "LVM_VG_NAME_INCOMPLETE") { | ||
| return "", nil | ||
| } | ||
|
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| vgName := strings.TrimSuffix(strings.TrimPrefix(strings.TrimSuffix(stdOut, "\n"), "LVM_VG_NAME_COMPLETE='"), "'") | ||
|
|
||
| return vgName, nil | ||
| } |
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