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Fix instance not found issues when an Azure Node is recreated in a short time

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This commit is contained in:
Pengfei Ni 2020-07-22 10:47:33 +08:00
parent 98814409ba
commit 358885660d
2 changed files with 15 additions and 6 deletions
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7
staging/src/k8s.io/legacy-cloud-providers/azure/azure_vmss.go
View File

@ -283,6 +283,13 @@ func (ss *scaleSet) getVmssVMByInstanceID(resourceGroup, scaleSetName, instanceI
if found && vm != nil {
return vm, nil
}
if found && vm == nil {
klog.V(2).Infof("Couldn't find VMSS VM with scaleSetName %q and instanceID %q, refreshing the cache if it is expired", scaleSetName, instanceID)
vm, found, err = getter(azcache.CacheReadTypeDefault)
if err != nil {
return nil, err
}
}
if !found || vm == nil {
return nil, cloudprovider.InstanceNotFound
}

14
staging/src/k8s.io/legacy-cloud-providers/azure/azure_vmss_cache.go
View File

@ -154,6 +154,11 @@ func (ss *scaleSet) gcVMSSVMCache() error {
// newVMSSVirtualMachinesCache instanciates a new VMs cache for VMs belonging to the provided VMSS.
func (ss *scaleSet) newVMSSVirtualMachinesCache(resourceGroupName, vmssName, cacheKey string) (*azcache.TimedCache, error) {
if ss.Config.VmssVirtualMachinesCacheTTLInSeconds == 0 {
ss.Config.VmssVirtualMachinesCacheTTLInSeconds = vmssVirtualMachinesCacheTTLDefaultInSeconds
}
vmssVirtualMachinesCacheTTL := time.Duration(ss.Config.VmssVirtualMachinesCacheTTLInSeconds) * time.Second
getter := func(key string) (interface{}, error) {
localCache := &sync.Map{} // [nodeName]*vmssVirtualMachinesEntry
@ -212,9 +217,9 @@ func (ss *scaleSet) newVMSSVirtualMachinesCache(resourceGroupName, vmssName, cac
// add old missing cache data with nil entries to prevent aggressive
// ARM calls during cache invalidation
for name, vmEntry := range oldCache {
// if the nil cache entry has existed for 15 minutes in the cache
// if the nil cache entry has existed for vmssVirtualMachinesCacheTTL in the cache
// then it should not be added back to the cache
if vmEntry.virtualMachine == nil && time.Since(vmEntry.lastUpdate) > 15*time.Minute {
if vmEntry.virtualMachine == nil && time.Since(vmEntry.lastUpdate) > vmssVirtualMachinesCacheTTL {
klog.V(5).Infof("ignoring expired entries from old cache for %s", name)
continue
}
@ -238,10 +243,7 @@ func (ss *scaleSet) newVMSSVirtualMachinesCache(resourceGroupName, vmssName, cac
return localCache, nil
}
if ss.Config.VmssVirtualMachinesCacheTTLInSeconds == 0 {
ss.Config.VmssVirtualMachinesCacheTTLInSeconds = vmssVirtualMachinesCacheTTLDefaultInSeconds
}
return azcache.NewTimedcache(time.Duration(ss.Config.VmssVirtualMachinesCacheTTLInSeconds)*time.Second, getter)
return azcache.NewTimedcache(vmssVirtualMachinesCacheTTL, getter)
}
func (ss *scaleSet) deleteCacheForNode(nodeName string) error {