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write checkpoint only when allocated devices updated.

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This commit is contained in:
chenyw1990
2020-10-15 21:20:15 +08:00
parent 28b46be97b
commit 009d46f834
1 changed files with 8 additions and 2 deletions
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10
pkg/kubelet/cm/devicemanager/manager.go
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@@ -833,6 +833,7 @@ func (m *ManagerImpl) allocateContainerResources(pod *v1.Pod, container *v1.Cont
podUID := string(pod.UID) podUID := string(pod.UID)
contName := container.Name contName := container.Name
allocatedDevicesUpdated := false allocatedDevicesUpdated := false
needsUpdateCheckpoint := false
// Extended resources are not allowed to be overcommitted. // Extended resources are not allowed to be overcommitted.
// Since device plugin advertises extended resources, // Since device plugin advertises extended resources,
// therefore Requests must be equal to Limits and iterating // therefore Requests must be equal to Limits and iterating
@@ -858,6 +859,8 @@ func (m *ManagerImpl) allocateContainerResources(pod *v1.Pod, container *v1.Cont
continue continue
} }
needsUpdateCheckpoint = true
startRPCTime := time.Now() startRPCTime := time.Now()
// Manager.Allocate involves RPC calls to device plugin, which // Manager.Allocate involves RPC calls to device plugin, which
// could be heavy-weight. Therefore we want to perform this operation outside // could be heavy-weight. Therefore we want to perform this operation outside
@@ -906,8 +909,11 @@ func (m *ManagerImpl) allocateContainerResources(pod *v1.Pod, container *v1.Cont
m.mutex.Unlock() m.mutex.Unlock()
} }
// Checkpoints device to container allocation information. if needsUpdateCheckpoint {
return m.writeCheckpoint() return m.writeCheckpoint()
}
return nil
} }
// GetDeviceRunContainerOptions checks whether we have cached containerDevices // GetDeviceRunContainerOptions checks whether we have cached containerDevices