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member.go
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member.go
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// 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 etcd
import (
"context"
"fmt"
"github.com/cosi-project/runtime/pkg/controller"
"github.com/cosi-project/runtime/pkg/resource"
"github.com/cosi-project/runtime/pkg/safe"
"github.com/cosi-project/runtime/pkg/state"
"github.com/siderolabs/gen/optional"
"go.uber.org/zap"
pkgetcd "github.com/aenix-io/talm/internal/pkg/etcd"
"github.com/siderolabs/talos/pkg/machinery/resources/etcd"
"github.com/siderolabs/talos/pkg/machinery/resources/v1alpha1"
)
// MemberController updates information about the local etcd member.
type MemberController struct {
GetLocalMemberIDFunc func(ctx context.Context) (uint64, error)
}
// Name implements controller.Controller interface.
func (ctrl *MemberController) Name() string {
return "etcd.MemberController"
}
const etcdServiceID = "etcd"
// Inputs implements controller.Controller interface.
func (ctrl *MemberController) Inputs() []controller.Input {
return []controller.Input{
{
Namespace: v1alpha1.NamespaceName,
Type: v1alpha1.ServiceType,
ID: optional.Some(etcdServiceID),
Kind: controller.InputStrong,
},
}
}
// Outputs implements controller.Controller interface.
func (ctrl *MemberController) Outputs() []controller.Output {
return []controller.Output{
{
Type: etcd.MemberType,
Kind: controller.OutputExclusive,
},
}
}
// Run implements controller.Controller interface.
//
//nolint:gocyclo
func (ctrl *MemberController) Run(ctx context.Context, r controller.Runtime, logger *zap.Logger) error {
for {
select {
case <-ctx.Done():
return nil
case <-r.EventCh():
}
m := etcd.NewMember(etcd.NamespaceName, etcd.LocalMemberID)
etcdService, err := safe.ReaderGet[*v1alpha1.Service](ctx, r, v1alpha1.NewService(etcdServiceID).Metadata())
if err != nil && !state.IsNotFoundError(err) {
return fmt.Errorf("error getting etcd service resource: %w", err)
}
updateMemberID := etcdService != nil && etcdService.Metadata().Phase() == resource.PhaseRunning && etcdService.TypedSpec().Healthy
if updateMemberID {
var memberID uint64
memberID, err = ctrl.getLocalMemberID(ctx)
if err != nil {
return fmt.Errorf("error getting etcd local member ID: %w", err)
}
if err = safe.WriterModify(ctx, r, m, func(status *etcd.Member) error {
status.TypedSpec().MemberID = etcd.FormatMemberID(memberID)
return nil
}); err != nil {
return fmt.Errorf("error updating etcd member resource: %w", err)
}
} else {
if err = r.Destroy(ctx, m.Metadata()); err != nil && !state.IsNotFoundError(err) {
return fmt.Errorf("error destroying etcd member resource: %w", err)
}
}
r.ResetRestartBackoff()
}
}
// getLocalMemberID gets the etcd member ID of the local node.
func (ctrl *MemberController) getLocalMemberID(ctx context.Context) (uint64, error) {
if ctrl.GetLocalMemberIDFunc != nil {
return ctrl.GetLocalMemberIDFunc(ctx)
}
client, err := pkgetcd.NewLocalClient(ctx)
if err != nil {
return 0, err
}
defer client.Close() //nolint:errcheck
return client.GetMemberID(ctx)
}