func initiailizeMonitoring() {
defer log.Infoln("Initializing autonomic monitoring")
ch_aut_err := chn.GetAutonomicErrChannel()
enableLogReading = cfg.GetAgentAutonomic().EnableLogReading
mtr.Initialize(srv.List())
// Start log reader if needed
if enableLogReading {
lgr.StartLogReader()
log.WithField("logreader", enableLogReading).Debugln("Log reading is enabled")
}
// Get the list of containers (running or not) to monitor
containers, err := container.Docker().Client.ListContainers(true, false, "")
if err != nil {
log.WithField("err", err).Debugln("Error monitoring containers")
ch_aut_err <- err
}
// Start the monitor for each configured service
for _, c := range containers {
info, _ := container.Docker().Client.InspectContainer(c.Id)
status := getContainerStatus(info)
service, err := srv.GetServiceByImage(c.Image)
if err != nil {
log.WithFields(log.Fields{
"err": err,
"image": c.Image,
}).Warningln("Error monitoring service")
} else {
e := evt.Event{
Service: service.Name,
Image: c.Image,
Instance: c.Id,
Status: status,
}
evt.HandleCreateEvent(e)
evt.HanldeStartEvent(e)
mtr.AddInstance(c.Id)
if _, ok := instBuffer[c.Id]; !ok {
instBuffer[c.Id] = instanceMetricBuffer{
cpuInst: utils.BuildBuffer(c_B_SIZE),
cpuSys: utils.BuildBuffer(c_B_SIZE),
}
}
container.Docker().Client.StartMonitorStats(c.Id, statCallBack, ch_mnt_stats_err)
if status == enum.PENDING && enableLogReading {
startMonitorLog(c.Id)
}
}
}
}
// Events are: attach, commit, copy, create, destroy, die, exec_create, exec_start, export, kill, oom, pause, rename, resize, restart, start, stop, top, unpause, update
func eventCallback(event *dockerclient.Event, ec chan error, args ...interface{}) {
log.Debugln("Received event")
// By now we do not handle events with type != container
if event.Type != "container" {
log.WithField("type", event.Type).Debugln("Received event with type different from 'container'")
return
}
service, err := srv.GetServiceByImage(event.From)
if err != nil {
log.WithFields(log.Fields{
"err": err,
"event": event,
}).Warnln("Cannot handle event")
return
}
e := evt.Event{
Service: service.Name,
Image: event.From,
Instance: event.ID,
Type: event.Type,
}
switch event.Status {
case "create":
log.WithField("image", e.Image).Debugln("Received create signal")
evt.HandleCreateEvent(e)
container.Docker().Client.StartMonitorStats(e.Instance, statCallBack, ch_mnt_stats_err)
case "start":
log.WithField("image", e.Image).Debugln("Received start signal")
if _, ok := instBuffer[e.Instance]; !ok {
instBuffer[e.Instance] = instanceMetricBuffer{
cpuInst: utils.BuildBuffer(c_B_SIZE),
cpuSys: utils.BuildBuffer(c_B_SIZE),
}
}
e.Status = enum.PENDING
evt.HanldeStartEvent(e)
mtr.AddInstance(e.Instance)
if enableLogReading {
startMonitorLog(event.ID)
}
case "stop":
log.WithField("image", e.Image).Debugln("Received stop signal")
case "kill":
log.WithField("image", e.Image).Debugln("Received kill signal")
case "die":
log.WithField("image", e.Image).Debugln("Received die signal")
delete(instBuffer, e.Instance)
mtr.RemoveInstance(e.Instance)
evt.HandleStopEvent(e)
case "destroy":
log.WithField("id", e.Instance).Debugln("Received destroy signal")
evt.HandleRemoveEvent(e)
default:
log.WithFields(log.Fields{
"err": "event not handled",
"event": event.Status,
"image": event.From,
}).Debugln("Received unknown signal")
}
log.Debugln("Event handled")
}