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82 lines
2.3 KiB
Go
82 lines
2.3 KiB
Go
package events
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import (
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"github.com/docker/docker/reference"
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"github.com/docker/engine-api/types/events"
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"github.com/docker/engine-api/types/filters"
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)
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// Filter can filter out docker events from a stream
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type Filter struct {
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filter filters.Args
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}
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// NewFilter creates a new Filter
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func NewFilter(filter filters.Args) *Filter {
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return &Filter{filter: filter}
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}
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// Include returns true when the event ev is included by the filters
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func (ef *Filter) Include(ev events.Message) bool {
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return ef.filter.ExactMatch("event", ev.Action) &&
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ef.filter.ExactMatch("type", ev.Type) &&
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ef.matchContainer(ev) &&
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ef.matchVolume(ev) &&
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ef.matchNetwork(ev) &&
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ef.matchImage(ev) &&
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ef.matchLabels(ev.Actor.Attributes)
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}
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func (ef *Filter) matchLabels(attributes map[string]string) bool {
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if !ef.filter.Include("label") {
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return true
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}
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return ef.filter.MatchKVList("label", attributes)
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}
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func (ef *Filter) matchContainer(ev events.Message) bool {
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return ef.fuzzyMatchName(ev, events.ContainerEventType)
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}
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func (ef *Filter) matchVolume(ev events.Message) bool {
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return ef.fuzzyMatchName(ev, events.VolumeEventType)
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}
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func (ef *Filter) matchNetwork(ev events.Message) bool {
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return ef.fuzzyMatchName(ev, events.NetworkEventType)
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}
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func (ef *Filter) fuzzyMatchName(ev events.Message, eventType string) bool {
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return ef.filter.FuzzyMatch(eventType, ev.Actor.ID) ||
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ef.filter.FuzzyMatch(eventType, ev.Actor.Attributes["name"])
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}
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// matchImage matches against both event.Actor.ID (for image events)
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// and event.Actor.Attributes["image"] (for container events), so that any container that was created
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// from an image will be included in the image events. Also compare both
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// against the stripped repo name without any tags.
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func (ef *Filter) matchImage(ev events.Message) bool {
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id := ev.Actor.ID
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nameAttr := "image"
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var imageName string
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if ev.Type == events.ImageEventType {
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nameAttr = "name"
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}
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if n, ok := ev.Actor.Attributes[nameAttr]; ok {
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imageName = n
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}
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return ef.filter.ExactMatch("image", id) ||
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ef.filter.ExactMatch("image", imageName) ||
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ef.filter.ExactMatch("image", stripTag(id)) ||
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ef.filter.ExactMatch("image", stripTag(imageName))
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}
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func stripTag(image string) string {
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ref, err := reference.ParseNamed(image)
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if err != nil {
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return image
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}
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return ref.Name()
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}
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