func GetServiceInstanceStatus(name string, instance string) enum.Status {
service, err := getServiceBy("name", name)
if err != nil {
log.WithField("service", name).Errorln("Cannot get service instance status: service unknown")
return enum.UNKNOWN
}
switch {
case utils.ContainsString(service.Instances.Pending, instance):
return enum.PENDING
case utils.ContainsString(service.Instances.Running, instance):
return enum.RUNNING
case utils.ContainsString(service.Instances.Stopped, instance):
return enum.STOPPED
case utils.ContainsString(service.Instances.Paused, instance):
return enum.PAUSED
default:
return enum.UNKNOWN
}
}
func (p *scaleinCreator) computeWeight(name string, clusterData data.Shared) float64 {
service, _ := srv.GetServiceByName(name)
inst_run := len(service.Instances.Running)
inst_pen := len(service.Instances.Pending)
if inst_run < 1 {
return 0.0
}
baseServices := cfg.GetNodeConstraints().BaseServices
if (inst_pen+inst_run) <= 1 && utils.ContainsString(baseServices, name) {
return 0.0
}
policy := cfg.GetPolicy().Scalein
metrics := policy.Metrics
analytics := policy.Analytics
threshold := policy.Threshold
weights := []float64{}
for _, metric := range metrics {
if value, ok := clusterData.Service[name].Data.BaseShared[metric]; ok {
weights = append(weights, p.computeMetricWeight(value, threshold))
}
}
for _, analytic := range analytics {
if value, ok := clusterData.Service[name].Data.UserShared[analytic]; ok {
weights = append(weights, p.computeMetricWeight(value, threshold))
}
}
policyValue := utils.Mean(weights)
return policyValue
}
func (p *swapCreator) computeWeight(running string, candidate string, clusterData data.Shared) float64 {
srv_run, _ := srv.GetServiceByName(running)
srv_cand, _ := srv.GetServiceByName(candidate)
nRun := len(srv_run.Instances.Running)
baseServices := cfg.GetNodeConstraints().BaseServices
if utils.ContainsString(baseServices, running) && nRun < 2 {
return 0.0
}
// If the service has the resources to start without stopping the other
// there is no reason to swap them
if res.AvailableResourcesService(candidate) > 0 {
return 0.0
}
// TODO now this works only with homogeneous containers
// and taking into account only the CPUs. This is not a
// a good thing, so in the feuture the swap policy should
// be able to compare the resources needed by each containers
// and evaulte if it is possible to swap a container with
// more than one that is active, in order to obtain
// the requested amount of resources.
if srv_run.Docker.CPUnumber != srv_cand.Docker.CPUnumber {
return 0.0
}
runShared := clusterData.Service[running]
candShared := clusterData.Service[candidate]
policy := cfg.GetPolicy().Swap
metrics := policy.Metrics
analytics := policy.Analytics
threshold := policy.Threshold
weights := []float64{}
candValue := 0.0
runValue := 0.0
for _, metric := range metrics {
if value, ok := candShared.Data.BaseShared[metric]; ok {
candValue = value
} else {
candValue = -1.0
}
if value, ok := runShared.Data.BaseShared[metric]; ok {
runValue = value
} else {
runValue = -1.0
}
if candValue != -1.0 && runValue != -1.0 {
delta := candValue - runValue
weight := math.Min(1.0, delta/threshold)
weights = append(weights, weight)
} else {
log.WithFields(log.Fields{
"metric": metric,
"running": running,
"candidate": candidate,
}).Warnln("Cannot compare services: metric not present in both services")
}
}
for _, analytic := range analytics {
if value, ok := candShared.Data.UserShared[analytic]; ok {
candValue = value
} else {
candValue = -1.0
}
if value, ok := runShared.Data.UserShared[analytic]; ok {
runValue = value
} else {
runValue = -1.0
}
if candValue != -1.0 && runValue != -1.0 {
delta := candValue - runValue
weight := math.Min(1.0, delta/threshold)
weights = append(weights, weight)
} else {
log.WithFields(log.Fields{
"analytic": analytic,
"running": running,
"candidate": candidate,
}).Warnln("Cannot compare services: analytic not present in both services")
}
}
policyValue := math.Max(0.0, utils.Mean(weights))
return policyValue
}