Esempio n. 1
0
// qos compares pods by QoS (BestEffort < Burstable < Guaranteed)
func qosComparator(p1, p2 *api.Pod) int {
	qosP1 := qos.GetPodQos(p1)
	qosP2 := qos.GetPodQos(p2)
	// its a tie
	if qosP1 == qosP2 {
		return 0
	}
	// if p1 is best effort, we know p2 is burstable or guaranteed
	if qosP1 == qos.BestEffort {
		return -1
	}
	// we know p1 and p2 are not besteffort, so if p1 is burstable, p2 must be guaranteed
	if qosP1 == qos.Burstable {
		if qosP2 == qos.Guaranteed {
			return -1
		}
		return 1
	}
	// ok, p1 must be guaranteed.
	return 1
}
Esempio n. 2
0
// Admit rejects a pod if its not safe to admit for node stability.
func (m *managerImpl) Admit(attrs *lifecycle.PodAdmitAttributes) lifecycle.PodAdmitResult {
	m.RLock()
	defer m.RUnlock()
	if len(m.nodeConditions) == 0 {
		return lifecycle.PodAdmitResult{Admit: true}
	}
	notBestEffort := qos.BestEffort != qos.GetPodQos(attrs.Pod)
	if notBestEffort {
		return lifecycle.PodAdmitResult{Admit: true}
	}
	glog.Warningf("Failed to admit pod %v - %s", format.Pod(attrs.Pod), "node has conditions: %v", m.nodeConditions)
	// we reject all best effort pods until we are stable.
	return lifecycle.PodAdmitResult{
		Admit:   false,
		Reason:  reason,
		Message: message,
	}
}
Esempio n. 3
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// Determine if a pod is scheduled with best-effort QoS
func isPodBestEffort(pod *api.Pod) bool {
	return qos.GetPodQos(pod) == qos.BestEffort
}