From 8b95db66d10ff187d23531d85cb8d34b1fa639bb Mon Sep 17 00:00:00 2001 From: Pasha Sviderski Date: Mon, 22 Jun 2026 19:47:35 +1000 Subject: [PATCH] feat(machine): sync machine arch, daemon and docker versions to store, sync machine info on schedule --- internal/machine/api/pb/machine.pb.go | 463 ++++++++++++++------------ internal/machine/api/pb/machine.proto | 8 +- internal/machine/cluster.go | 124 +++++-- internal/machine/docker/service.go | 67 ++++ internal/machine/machine.go | 41 ++- internal/machine/machine_info_test.go | 3 +- internal/machine/store/store.go | 3 +- 7 files changed, 448 insertions(+), 261 deletions(-) diff --git a/internal/machine/api/pb/machine.pb.go b/internal/machine/api/pb/machine.pb.go index 149d050c..52ff1211 100644 --- a/internal/machine/api/pb/machine.pb.go +++ b/internal/machine/api/pb/machine.pb.go @@ -32,8 +32,14 @@ type MachineInfo struct { Name string `protobuf:"bytes,2,opt,name=name,proto3" json:"name,omitempty"` Network *NetworkConfig `protobuf:"bytes,3,opt,name=network,proto3" json:"network,omitempty"` PublicIp *IP `protobuf:"bytes,4,opt,name=public_ip,json=publicIp,proto3" json:"public_ip,omitempty"` - // Operating system hostname of the machine. + // Operating system hostname. Hostname string `protobuf:"bytes,5,opt,name=hostname,proto3" json:"hostname,omitempty"` + // CPU architecture. + Arch string `protobuf:"bytes,6,opt,name=arch,proto3" json:"arch,omitempty"` + // Version of the machine daemon (uncloudd). + DaemonVersion string `protobuf:"bytes,7,opt,name=daemon_version,json=daemonVersion,proto3" json:"daemon_version,omitempty"` + // Version of the Docker engine running on the machine. Could be empty if unable to get. + DockerVersion string `protobuf:"bytes,8,opt,name=docker_version,json=dockerVersion,proto3" json:"docker_version,omitempty"` } func (x *MachineInfo) Reset() { @@ -103,6 +109,27 @@ func (x *MachineInfo) GetHostname() string { return "" } +func (x *MachineInfo) GetArch() string { + if x != nil { + return x.Arch + } + return "" +} + +func (x *MachineInfo) GetDaemonVersion() string { + if x != nil { + return x.DaemonVersion + } + return "" +} + +func (x *MachineInfo) GetDockerVersion() string { + if x != nil { + return x.DockerVersion + } + return "" +} + type NetworkConfig struct { state protoimpl.MessageState sizeCache protoimpl.SizeCache @@ -1251,7 +1278,7 @@ var file_internal_machine_api_pb_machine_proto_rawDesc = []byte{ 0x74, 0x61, 0x6d, 0x70, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a, 0x24, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x61, 0x6c, 0x2f, 0x6d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x2f, 0x61, 0x70, 0x69, 0x2f, 0x70, 0x62, 0x2f, 0x63, 0x6f, 0x6d, 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Could be empty if unable to get. + string docker_version = 8; } message NetworkConfig { diff --git a/internal/machine/cluster.go b/internal/machine/cluster.go index 2a2a374c..b162f75f 100644 --- a/internal/machine/cluster.go +++ b/internal/machine/cluster.go @@ -26,8 +26,13 @@ import ( "github.com/psviderski/unregistry" "golang.org/x/sync/errgroup" "google.golang.org/grpc" + "google.golang.org/protobuf/proto" ) +// machineSyncInterval is how often the machine info is republished to the cluster store to recover from +// failed synchronous syncs. +const machineSyncInterval = 60 * time.Second + // clusterController is the main controller for the machine that is a cluster member. It manages components such as // the WireGuard network, API server listening the WireGuard network, Corrosion service, Docker network and containers, // and others. @@ -44,10 +49,14 @@ type clusterController struct { corroService corroservice.Service // corrosionDir is the disk path that holds the Corrosion config and data. // TODO: remove in 0.22 assuming all pre 0.20 clusters upgraded their pre-v1 Corrosion. - corrosionDir string - dockerCtrl *docker.Controller + corrosionDir string + dockerService *docker.Service + dockerCtrl *docker.Controller // dockerReady is signalled when Docker is configured and ready for containers. dockerReady chan<- struct{} + + // syncMachineTrigger requests to sync the machine info to the cluster store. + syncMachineTrigger chan struct{} // clusterReady is signalled when the cluster controller has finished initializing all components. clusterReady chan<- struct{} caddyconfigCtrl *caddyconfig.Controller @@ -87,23 +96,25 @@ func newClusterController( endpointChanges := wgnet.WatchEndpoints() return &clusterController{ - machine: machine, - state: machine.state, - store: store, - wgnet: wgnet, - endpointChanges: endpointChanges, - server: server, - corroService: corroService, - corrosionDir: corrosionDir, - dockerCtrl: docker.NewController(machine.state.ID, dockerService, store), - dockerReady: dockerReady, - clusterReady: clusterReady, - caddyconfigCtrl: caddyfileCtrl, - dnsServer: dnsServer, - dnsResolver: dnsResolver, - unregistry: unregistry, - metricsServer: metricsServer, - stopped: make(chan struct{}), + machine: machine, + state: machine.state, + store: store, + wgnet: wgnet, + endpointChanges: endpointChanges, + server: server, + corroService: corroService, + corrosionDir: corrosionDir, + dockerService: dockerService, + dockerCtrl: docker.NewController(machine.state.ID, dockerService, store), + dockerReady: dockerReady, + syncMachineTrigger: make(chan struct{}, 1), + clusterReady: clusterReady, + caddyconfigCtrl: caddyfileCtrl, + dnsServer: dnsServer, + dnsResolver: dnsResolver, + unregistry: unregistry, + metricsServer: metricsServer, + stopped: make(chan struct{}), }, nil } @@ -194,12 +205,6 @@ func (cc *clusterController) Run(ctx context.Context) error { return err } - // Republish this machine's info from local state (the source of truth) to the cluster store. This keeps the - // store consistent with the actual machine state on every start. - if err = cc.syncMachineInfo(ctx); err != nil { - return fmt.Errorf("sync machine info to cluster store: %w", err) - } - errGroup.Go(func() error { slog.Info("Starting metrics server.") if err := cc.metricsServer.Run(ctx); err != nil { @@ -225,6 +230,11 @@ func (cc *clusterController) Run(ctx context.Context) error { return nil }) + // Keep the machine info in the cluster store in sync with the actual machine state (the source of truth). + errGroup.Go(func() error { + return cc.runMachineSync(ctx) + }) + // Synchronise Docker containers to the cluster store. errGroup.Go(func() error { slog.Info("Watching Docker containers and syncing them to cluster store.") @@ -494,15 +504,66 @@ func (cc *clusterController) waitKnownMissingChanges(ctx context.Context) error } } -// syncMachineInfo republishes this machine's info from local state to the cluster store. The local state is the -// source of truth for the machine's own MachineInfo. -func (cc *clusterController) syncMachineInfo(ctx context.Context) error { +// runMachineSync keeps this machine's info in the cluster store in sync with the local state and the Docker engine +// version. Call RequestMachineSync to trigger an immediate sync. +func (cc *clusterController) runMachineSync(ctx context.Context) error { + // Backfill legacy local state from the cluster store once before the first sync. if err := cc.backfillMachineState(ctx); err != nil { - return err + return fmt.Errorf("backfill machine state: %w", err) } - info := cc.machine.Info() - if err := cc.store.UpdateMachine(ctx, info); err != nil { + if err := cc.syncMachineInfo(ctx); err != nil { + slog.Error("Failed to sync machine info to cluster store.", "err", err) + } + + ticker := time.NewTicker(machineSyncInterval) + defer ticker.Stop() + dockerRestarted := cc.dockerService.WatchDaemonRestart(ctx) + + for { + select { + case <-ctx.Done(): + return nil + case <-ticker.C: // Scheduled periodic sync. + case <-cc.syncMachineTrigger: // Immediate sync request. + case <-dockerRestarted: // Docker daemon restarted -- engine version may have changed. + } + + if err := cc.syncMachineInfo(ctx); err != nil { + slog.Error("Failed to sync machine info to cluster store.", "err", err) + } + } +} + +// RequestMachineSync triggers an immediate sync of this machine's info to the cluster store. +// It never blocks and coalesces with any already pending sync. +func (cc *clusterController) RequestMachineSync() { + select { + case cc.syncMachineTrigger <- struct{}{}: + default: + } +} + +// syncMachineInfo republishes this machine's info from local state to the cluster store, skipping the +// write if the info is unchanged since the last successful write. +func (cc *clusterController) syncMachineInfo(ctx context.Context) error { + publishedInfo, err := cc.store.GetMachine(ctx, cc.state.ID) + if err != nil { + return fmt.Errorf("get machine from store: %w", err) + } + + info := cc.machine.Info(ctx) + // Info leaves the Docker engine version empty when the engine is unavailable. Keep the previously + // published version in that case rather than overwriting it with an empty value. + if info.DockerVersion == "" { + info.DockerVersion = publishedInfo.DockerVersion + } + + if proto.Equal(info, publishedInfo) { + return nil + } + + if err = cc.store.UpdateMachine(ctx, info); err != nil { if errors.Is(err, store.ErrMachineNotFound) { // This should not happen but let's try to recreate it. if createErr := cc.store.CreateMachine(ctx, info); createErr != nil { @@ -519,6 +580,7 @@ func (cc *clusterController) syncMachineInfo(ctx context.Context) error { // backfillMachineState backfills legacy local state that predates local ownership of endpoints/public IP // (implemented in 0.20) from the cluster store. +// TODO: remove after releasing 0.22. func (cc *clusterController) backfillMachineState(ctx context.Context) error { cc.state.mu.Lock() defer cc.state.mu.Unlock() diff --git a/internal/machine/docker/service.go b/internal/machine/docker/service.go index 076da678..41099a71 100644 --- a/internal/machine/docker/service.go +++ b/internal/machine/docker/service.go @@ -12,7 +12,9 @@ import ( "strings" "time" + "github.com/cenkalti/backoff/v4" "github.com/docker/docker/api/types/container" + "github.com/docker/docker/api/types/events" "github.com/docker/docker/api/types/filters" "github.com/docker/docker/api/types/image" "github.com/docker/docker/client" @@ -40,6 +42,71 @@ func NewService(client *client.Client, db *sqlx.DB) *Service { } } +// WatchDaemonRestart watches the Docker engine and signals on the returned channel whenever the daemon +// becomes reachable again after a disconnect, which typically indicates a restart. +func (s *Service) WatchDaemonRestart(ctx context.Context) <-chan struct{} { + // Buffering as a pending signal is enough for the consumer to react to a restart. + ch := make(chan struct{}, 1) + + go func() { + defer close(ch) + + boff := backoff.WithContext(backoff.NewExponentialBackOff( + backoff.WithInitialInterval(1*time.Second), + backoff.WithMaxInterval(30*time.Second), + backoff.WithMaxElapsedTime(0), + ), ctx) + + // firstConnect tracks the initial connection so it is not reported as a restart. + firstConnect := true + + watch := func() error { + // Confirm the daemon is reachable. While it is down this fails and is retried with backoff. + if _, err := s.Client.Ping(ctx); err != nil { + firstConnect = false + return fmt.Errorf("ping Docker daemon: %w", err) + } + // Reset the backoff after a successful connection so the next reconnect retries quickly. + boff.Reset() + + if firstConnect { + firstConnect = false + } else { + // The daemon became reachable again after a disconnect. It likely restarted. + slog.Debug("Docker daemon reconnected.") + select { + case ch <- struct{}{}: + default: + } + } + + // Subscribe to daemon events and block until the stream breaks (daemon stopped/restarting) or + // the context is done. Filter to non-existent events to not receive any events. + eventCh, errCh := s.Client.Events(ctx, events.ListOptions{ + Filters: filters.NewArgs(filters.Arg("type", "invalid")), + }) + for { + select { + case <-ctx.Done(): + return nil + case <-eventCh: + // This shouldn't emit anything but drain just in case. We only care about the stream lifecycle. + case streamErr := <-errCh: + if ctx.Err() != nil { + return nil + } + return fmt.Errorf("docker event stream closed: %w", streamErr) + } + } + } + + // Retry watching the engine until the context is cancelled. + _ = backoff.Retry(watch, boff) + }() + + return ch +} + // InspectServiceContainer inspects a Docker container and retrieves its associated ServiceSpec // from the machine database, returning a complete ServiceContainer. func (s *Service) InspectServiceContainer(ctx context.Context, nameOrID string) (api.ServiceContainer, error) { diff --git a/internal/machine/machine.go b/internal/machine/machine.go index a070b87c..2594ceed 100644 --- a/internal/machine/machine.go +++ b/internal/machine/machine.go @@ -11,6 +11,7 @@ import ( "os" "os/user" "path/filepath" + "runtime" "slices" "strconv" "strings" @@ -38,6 +39,7 @@ import ( "github.com/psviderski/uncloud/internal/machine/network" "github.com/psviderski/uncloud/internal/machine/store" "github.com/psviderski/uncloud/internal/secret" + "github.com/psviderski/uncloud/internal/version" "github.com/psviderski/uncloud/pkg/api" "github.com/psviderski/unregistry" "github.com/siderolabs/grpc-proxy/proxy" @@ -1018,7 +1020,18 @@ func (m *Machine) Token(_ context.Context, _ *emptypb.Empty) (*pb.TokenResponse, } // Info returns the machine configuration and runtime details. -func (m *Machine) Info() *pb.MachineInfo { +func (m *Machine) Info(ctx context.Context) *pb.MachineInfo { + // Best-effort fetch of the Docker engine version. It stays empty if the engine is unavailable. + var dockerVersion string + if m.dockerService != nil { + v, err := m.dockerService.Client.ServerVersion(ctx) + if err != nil { + slog.Debug("Failed to get Docker engine version.", "err", err) + } else { + dockerVersion = v.Version + } + } + m.state.mu.RLock() defer m.state.mu.RUnlock() @@ -1030,25 +1043,29 @@ func (m *Machine) Info() *pb.MachineInfo { } info := &pb.MachineInfo{ - Id: m.state.ID, - Name: m.state.Name, - Hostname: hostname, + Id: m.state.ID, + Name: m.state.Name, Network: &pb.NetworkConfig{ Subnet: pb.NewIPPrefix(m.state.Network.Subnet), ManagementIp: pb.NewIP(m.state.Network.ManagementIP), Endpoints: endpoints, PublicKey: m.state.Network.PublicKey, }, + Hostname: hostname, + Arch: runtime.GOARCH, + DaemonVersion: version.String(), + DockerVersion: dockerVersion, } if m.state.PublicIP.IsValid() { info.PublicIp = pb.NewIP(m.state.PublicIP) } + return info } // Deprecated: use InspectMachine instead. -func (m *Machine) Inspect(_ context.Context, _ *emptypb.Empty) (*pb.MachineInfo, error) { - return m.Info(), nil +func (m *Machine) Inspect(ctx context.Context, _ *emptypb.Empty) (*pb.MachineInfo, error) { + return m.Info(ctx), nil } func (m *Machine) InspectMachine(ctx context.Context, _ *emptypb.Empty) (*pb.InspectMachineResponse, error) { @@ -1069,7 +1086,7 @@ func (m *Machine) InspectMachine(ctx context.Context, _ *emptypb.Empty) (*pb.Ins Machines: []*pb.MachineDetails{ { // Metadata is injected by the gRPC proxy. - Machine: m.Info(), + Machine: m.Info(ctx), StoreVersion: storeVersion, Rtts: rtts, }, @@ -1089,13 +1106,13 @@ func (m *Machine) UpdateMachine(ctx context.Context, req *pb.UpdateMachineReques } m.mu.RLock() - defer m.mu.RUnlock() - - info := m.Info() - if err := m.store.UpdateMachine(ctx, info); err != nil { - return nil, status.Errorf(codes.Internal, "sync machine to cluster store: %v", err) + clusterCtrl := m.clusterCtrl + m.mu.RUnlock() + if clusterCtrl != nil { + clusterCtrl.RequestMachineSync() } + info := m.Info(ctx) slog.Info("Machine configuration updated.", "id", info.Id, "name", info.Name) return &pb.UpdateMachineResponse{Machine: info}, nil } diff --git a/internal/machine/machine_info_test.go b/internal/machine/machine_info_test.go index de5083a5..283e99c1 100644 --- a/internal/machine/machine_info_test.go +++ b/internal/machine/machine_info_test.go @@ -1,6 +1,7 @@ package machine import ( + "context" "net/netip" "testing" @@ -63,7 +64,7 @@ func TestMachineInfo(t *testing.T) { t.Parallel() m := &Machine{state: tt.state} - info := m.Info() + info := m.Info(context.Background()) assert.Equal(t, tt.state.ID, info.Id) assert.Equal(t, tt.state.Name, info.Name) diff --git a/internal/machine/store/store.go b/internal/machine/store/store.go index e95049d1..0ba235aa 100644 --- a/internal/machine/store/store.go +++ b/internal/machine/store/store.go @@ -290,7 +290,8 @@ func (s *Store) SubscribeMachines(ctx context.Context) ([]*pb.MachineInfo, <-cha } var m pb.MachineInfo - if err = protojson.Unmarshal([]byte(mJSON), &m); err != nil { + protojsonParser := protojson.UnmarshalOptions{DiscardUnknown: true} + if err = protojsonParser.Unmarshal([]byte(mJSON), &m); err != nil { return nil, nil, fmt.Errorf("unmarshal machine info: %w", err) } machines = append(machines, &m)