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package libpod
import (
"os"
"github.com/containers/libpod/libpod/events"
"github.com/hpcloud/tail"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
// newContainerEvent creates a new event based on a container
func (c *Container) newContainerEvent(status events.Status) {
e := events.NewEvent(status)
e.ID = c.ID()
e.Name = c.Name()
e.Image = c.config.RootfsImageName
e.Type = events.Container
if err := e.Write(c.runtime.config.EventsLogFilePath); err != nil {
logrus.Errorf("unable to write event to %s", c.runtime.config.EventsLogFilePath)
}
}
// newContainerExitedEvent creates a new event for a container's death
func (c *Container) newContainerExitedEvent(exitCode int32) {
e := events.NewEvent(events.Exited)
e.ID = c.ID()
e.Name = c.Name()
e.Image = c.config.RootfsImageName
e.Type = events.Container
e.ContainerExitCode = int(exitCode)
if err := e.Write(c.runtime.config.EventsLogFilePath); err != nil {
logrus.Errorf("unable to write event to %s", c.runtime.config.EventsLogFilePath)
}
}
// newPodEvent creates a new event for a libpod pod
func (p *Pod) newPodEvent(status events.Status) {
e := events.NewEvent(status)
e.ID = p.ID()
e.Name = p.Name()
e.Type = events.Pod
if err := e.Write(p.runtime.config.EventsLogFilePath); err != nil {
logrus.Errorf("unable to write event to %s", p.runtime.config.EventsLogFilePath)
}
}
// newVolumeEvent creates a new event for a libpod volume
func (v *Volume) newVolumeEvent(status events.Status) {
e := events.NewEvent(status)
e.Name = v.Name()
e.Type = events.Volume
if err := e.Write(v.runtime.config.EventsLogFilePath); err != nil {
logrus.Errorf("unable to write event to %s", v.runtime.config.EventsLogFilePath)
}
}
// Events is a wrapper function for everyone to begin tailing the events log
// with options
func (r *Runtime) Events(fromStart, stream bool, options []events.EventFilter, eventChannel chan *events.Event) error {
t, err := r.getTail(fromStart, stream)
if err != nil {
return err
}
for line := range t.Lines {
event, err := events.NewEventFromString(line.Text)
if err != nil {
return err
}
switch event.Type {
case events.Image, events.Volume, events.Pod, events.Container:
// no-op
default:
return errors.Errorf("event type %s is not valid in %s", event.Type.String(), r.GetConfig().EventsLogFilePath)
}
include := true
for _, filter := range options {
include = include && filter(event)
}
if include {
eventChannel <- event
}
}
close(eventChannel)
return nil
}
func (r *Runtime) getTail(fromStart, stream bool) (*tail.Tail, error) {
reopen := true
seek := tail.SeekInfo{Offset: 0, Whence: os.SEEK_END}
if fromStart || !stream {
seek.Whence = 0
reopen = false
}
return tail.TailFile(r.config.EventsLogFilePath, tail.Config{ReOpen: reopen, Follow: stream, Location: &seek})
}
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