package daemon // import "github.com/docker/docker/daemon" import ( "context" "strconv" "strings" "time" "github.com/docker/docker/api/types/events" "github.com/docker/docker/api/types/filters" "github.com/docker/docker/container" daemonevents "github.com/docker/docker/daemon/events" "github.com/docker/docker/libnetwork" swarmapi "github.com/docker/swarmkit/api" gogotypes "github.com/gogo/protobuf/types" "github.com/sirupsen/logrus" ) var ( clusterEventAction = map[swarmapi.WatchActionKind]string{ swarmapi.WatchActionKindCreate: "create", swarmapi.WatchActionKindUpdate: "update", swarmapi.WatchActionKindRemove: "remove", } ) // LogContainerEvent generates an event related to a container with only the default attributes. func (daemon *Daemon) LogContainerEvent(container *container.Container, action string) { daemon.LogContainerEventWithAttributes(container, action, map[string]string{}) } // LogContainerEventWithAttributes generates an event related to a container with specific given attributes. func (daemon *Daemon) LogContainerEventWithAttributes(container *container.Container, action string, attributes map[string]string) { copyAttributes(attributes, container.Config.Labels) if container.Config.Image != "" { attributes["image"] = container.Config.Image } attributes["name"] = strings.TrimLeft(container.Name, "/") actor := events.Actor{ ID: container.ID, Attributes: attributes, } daemon.EventsService.Log(action, events.ContainerEventType, actor) } // LogPluginEvent generates an event related to a plugin with only the default attributes. func (daemon *Daemon) LogPluginEvent(pluginID, refName, action string) { daemon.LogPluginEventWithAttributes(pluginID, refName, action, map[string]string{}) } // LogPluginEventWithAttributes generates an event related to a plugin with specific given attributes. func (daemon *Daemon) LogPluginEventWithAttributes(pluginID, refName, action string, attributes map[string]string) { attributes["name"] = refName actor := events.Actor{ ID: pluginID, Attributes: attributes, } daemon.EventsService.Log(action, events.PluginEventType, actor) } // LogVolumeEvent generates an event related to a volume. func (daemon *Daemon) LogVolumeEvent(volumeID, action string, attributes map[string]string) { actor := events.Actor{ ID: volumeID, Attributes: attributes, } daemon.EventsService.Log(action, events.VolumeEventType, actor) } // LogNetworkEvent generates an event related to a network with only the default attributes. func (daemon *Daemon) LogNetworkEvent(nw libnetwork.Network, action string) { daemon.LogNetworkEventWithAttributes(nw, action, map[string]string{}) } // LogNetworkEventWithAttributes generates an event related to a network with specific given attributes. func (daemon *Daemon) LogNetworkEventWithAttributes(nw libnetwork.Network, action string, attributes map[string]string) { attributes["name"] = nw.Name() attributes["type"] = nw.Type() actor := events.Actor{ ID: nw.ID(), Attributes: attributes, } daemon.EventsService.Log(action, events.NetworkEventType, actor) } // LogDaemonEventWithAttributes generates an event related to the daemon itself with specific given attributes. func (daemon *Daemon) LogDaemonEventWithAttributes(action string, attributes map[string]string) { if daemon.EventsService != nil { if info := daemon.SystemInfo(); info.Name != "" { attributes["name"] = info.Name } actor := events.Actor{ ID: daemon.id, Attributes: attributes, } daemon.EventsService.Log(action, events.DaemonEventType, actor) } } // SubscribeToEvents returns the currently record of events, a channel to stream new events from, and a function to cancel the stream of events. func (daemon *Daemon) SubscribeToEvents(since, until time.Time, filter filters.Args) ([]events.Message, chan interface{}) { ef := daemonevents.NewFilter(filter) return daemon.EventsService.SubscribeTopic(since, until, ef) } // UnsubscribeFromEvents stops the event subscription for a client by closing the // channel where the daemon sends events to. func (daemon *Daemon) UnsubscribeFromEvents(listener chan interface{}) { daemon.EventsService.Evict(listener) } // copyAttributes guarantees that labels are not mutated by event triggers. func copyAttributes(attributes, labels map[string]string) { if labels == nil { return } for k, v := range labels { attributes[k] = v } } // ProcessClusterNotifications gets changes from store and add them to event list func (daemon *Daemon) ProcessClusterNotifications(ctx context.Context, watchStream chan *swarmapi.WatchMessage) { for { select { case <-ctx.Done(): return case message, ok := <-watchStream: if !ok { logrus.Debug("cluster event channel has stopped") return } daemon.generateClusterEvent(message) } } } func (daemon *Daemon) generateClusterEvent(msg *swarmapi.WatchMessage) { for _, event := range msg.Events { if event.Object == nil { logrus.Errorf("event without object: %v", event) continue } switch v := event.Object.GetObject().(type) { case *swarmapi.Object_Node: daemon.logNodeEvent(event.Action, v.Node, event.OldObject.GetNode()) case *swarmapi.Object_Service: daemon.logServiceEvent(event.Action, v.Service, event.OldObject.GetService()) case *swarmapi.Object_Network: daemon.logNetworkEvent(event.Action, v.Network, event.OldObject.GetNetwork()) case *swarmapi.Object_Secret: daemon.logSecretEvent(event.Action, v.Secret, event.OldObject.GetSecret()) case *swarmapi.Object_Config: daemon.logConfigEvent(event.Action, v.Config, event.OldObject.GetConfig()) default: logrus.Warnf("unrecognized event: %v", event) } } } func (daemon *Daemon) logNetworkEvent(action swarmapi.WatchActionKind, net *swarmapi.Network, oldNet *swarmapi.Network) { attributes := map[string]string{ "name": net.Spec.Annotations.Name, } eventTime := eventTimestamp(net.Meta, action) daemon.logClusterEvent(action, net.ID, "network", attributes, eventTime) } func (daemon *Daemon) logSecretEvent(action swarmapi.WatchActionKind, secret *swarmapi.Secret, oldSecret *swarmapi.Secret) { attributes := map[string]string{ "name": secret.Spec.Annotations.Name, } eventTime := eventTimestamp(secret.Meta, action) daemon.logClusterEvent(action, secret.ID, "secret", attributes, eventTime) } func (daemon *Daemon) logConfigEvent(action swarmapi.WatchActionKind, config *swarmapi.Config, oldConfig *swarmapi.Config) { attributes := map[string]string{ "name": config.Spec.Annotations.Name, } eventTime := eventTimestamp(config.Meta, action) daemon.logClusterEvent(action, config.ID, "config", attributes, eventTime) } func (daemon *Daemon) logNodeEvent(action swarmapi.WatchActionKind, node *swarmapi.Node, oldNode *swarmapi.Node) { name := node.Spec.Annotations.Name if name == "" && node.Description != nil { name = node.Description.Hostname } attributes := map[string]string{ "name": name, } eventTime := eventTimestamp(node.Meta, action) // In an update event, display the changes in attributes if action == swarmapi.WatchActionKindUpdate && oldNode != nil { if node.Spec.Availability != oldNode.Spec.Availability { attributes["availability.old"] = strings.ToLower(oldNode.Spec.Availability.String()) attributes["availability.new"] = strings.ToLower(node.Spec.Availability.String()) } if node.Role != oldNode.Role { attributes["role.old"] = strings.ToLower(oldNode.Role.String()) attributes["role.new"] = strings.ToLower(node.Role.String()) } if node.Status.State != oldNode.Status.State { attributes["state.old"] = strings.ToLower(oldNode.Status.State.String()) attributes["state.new"] = strings.ToLower(node.Status.State.String()) } // This handles change within manager role if node.ManagerStatus != nil && oldNode.ManagerStatus != nil { // leader change if node.ManagerStatus.Leader != oldNode.ManagerStatus.Leader { if node.ManagerStatus.Leader { attributes["leader.old"] = "false" attributes["leader.new"] = "true" } else { attributes["leader.old"] = "true" attributes["leader.new"] = "false" } } if node.ManagerStatus.Reachability != oldNode.ManagerStatus.Reachability { attributes["reachability.old"] = strings.ToLower(oldNode.ManagerStatus.Reachability.String()) attributes["reachability.new"] = strings.ToLower(node.ManagerStatus.Reachability.String()) } } } daemon.logClusterEvent(action, node.ID, "node", attributes, eventTime) } func (daemon *Daemon) logServiceEvent(action swarmapi.WatchActionKind, service *swarmapi.Service, oldService *swarmapi.Service) { attributes := map[string]string{ "name": service.Spec.Annotations.Name, } eventTime := eventTimestamp(service.Meta, action) if action == swarmapi.WatchActionKindUpdate && oldService != nil { // check image if x, ok := service.Spec.Task.GetRuntime().(*swarmapi.TaskSpec_Container); ok { containerSpec := x.Container if y, ok := oldService.Spec.Task.GetRuntime().(*swarmapi.TaskSpec_Container); ok { oldContainerSpec := y.Container if containerSpec.Image != oldContainerSpec.Image { attributes["image.old"] = oldContainerSpec.Image attributes["image.new"] = containerSpec.Image } } else { // This should not happen. logrus.Errorf("service %s runtime changed from %T to %T", service.Spec.Annotations.Name, oldService.Spec.Task.GetRuntime(), service.Spec.Task.GetRuntime()) } } // check replicated count change if x, ok := service.Spec.GetMode().(*swarmapi.ServiceSpec_Replicated); ok { replicas := x.Replicated.Replicas if y, ok := oldService.Spec.GetMode().(*swarmapi.ServiceSpec_Replicated); ok { oldReplicas := y.Replicated.Replicas if replicas != oldReplicas { attributes["replicas.old"] = strconv.FormatUint(oldReplicas, 10) attributes["replicas.new"] = strconv.FormatUint(replicas, 10) } } else { // This should not happen. logrus.Errorf("service %s mode changed from %T to %T", service.Spec.Annotations.Name, oldService.Spec.GetMode(), service.Spec.GetMode()) } } if service.UpdateStatus != nil { if oldService.UpdateStatus == nil { attributes["updatestate.new"] = strings.ToLower(service.UpdateStatus.State.String()) } else if service.UpdateStatus.State != oldService.UpdateStatus.State { attributes["updatestate.old"] = strings.ToLower(oldService.UpdateStatus.State.String()) attributes["updatestate.new"] = strings.ToLower(service.UpdateStatus.State.String()) } } } daemon.logClusterEvent(action, service.ID, "service", attributes, eventTime) } func (daemon *Daemon) logClusterEvent(action swarmapi.WatchActionKind, id, eventType string, attributes map[string]string, eventTime time.Time) { actor := events.Actor{ ID: id, Attributes: attributes, } jm := events.Message{ Action: clusterEventAction[action], Type: eventType, Actor: actor, Scope: "swarm", Time: eventTime.UTC().Unix(), TimeNano: eventTime.UTC().UnixNano(), } daemon.EventsService.PublishMessage(jm) } func eventTimestamp(meta swarmapi.Meta, action swarmapi.WatchActionKind) time.Time { var eventTime time.Time switch action { case swarmapi.WatchActionKindCreate: eventTime, _ = gogotypes.TimestampFromProto(meta.CreatedAt) case swarmapi.WatchActionKindUpdate: eventTime, _ = gogotypes.TimestampFromProto(meta.UpdatedAt) case swarmapi.WatchActionKindRemove: // There is no timestamp from store message for remove operations. // Use current time. eventTime = time.Now() } return eventTime }