package daemon import ( "strings" "time" "github.com/docker/docker/container" daemonevents "github.com/docker/docker/daemon/events" "github.com/docker/engine-api/types/events" "github.com/docker/engine-api/types/filters" "github.com/docker/libnetwork" ) // 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) } // LogImageEvent generates an event related to an image with only the default attributes. func (daemon *Daemon) LogImageEvent(imageID, refName, action string) { daemon.LogImageEventWithAttributes(imageID, refName, action, map[string]string{}) } // LogImageEventWithAttributes generates an event related to an image with specific given attributes. func (daemon *Daemon) LogImageEventWithAttributes(imageID, refName, action string, attributes map[string]string) { img, err := daemon.GetImage(imageID) if err == nil && img.Config != nil { // image has not been removed yet. // it could be missing if the event is `delete`. copyAttributes(attributes, img.Config.Labels) } if refName != "" { attributes["name"] = refName } actor := events.Actor{ ID: imageID, Attributes: attributes, } daemon.EventsService.Log(action, events.ImageEventType, 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) } // 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 } }