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GCE provider: Create TargetPool with 200 instances, then update with rest

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Tested with 2000 nodes, this actually meets the GCE API specifications
(which is nutty). Previous PR (#25178) was based on a mistaken
understanding of a poorly documented set of limitations, and even
poorer testing, for which I am embarassed.
This commit is contained in:
Zach Loafman 2016-06-21 18:09:31 -07:00
parent ebc65f1dd3
commit f63ac1962c
1 changed files with 27 additions and 3 deletions
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30
pkg/cloudprovider/providers/gce/gce.go
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@ -69,6 +69,9 @@ const (
// are iterated through to prevent infinite loops if the API
// were to continuously return a nextPageToken.
maxPages = 25
// Target Pool creation is limited to 200 instances.
maxTargetPoolCreateInstances = 200
)
// GCECloud is an implementation of Interface, LoadBalancer and Instances for Google Compute Engine.
@ -537,7 +540,7 @@ func (gce *GCECloud) EnsureLoadBalancer(apiService *api.Service, hostNames []str
affinityType := apiService.Spec.SessionAffinity
serviceName := types.NamespacedName{Namespace: apiService.Namespace, Name: apiService.Name}
glog.V(2).Infof("EnsureLoadBalancer(%v, %v, %v, %v, %v, %v, %v)", loadBalancerName, gce.region, loadBalancerIP, portStr, hosts, serviceName, apiService.Annotations)
glog.V(2).Infof("EnsureLoadBalancer(%v, %v, %v, %v, %v, %v, %v)", loadBalancerName, gce.region, loadBalancerIP, portStr, hostNames, serviceName, apiService.Annotations)
// Check if the forwarding rule exists, and if so, what its IP is.
fwdRuleExists, fwdRuleNeedsUpdate, fwdRuleIP, err := gce.forwardingRuleNeedsUpdate(loadBalancerName, gce.region, loadBalancerIP, ports)
@ -706,10 +709,27 @@ func (gce *GCECloud) EnsureLoadBalancer(apiService *api.Service, hostNames []str
// Once we've deleted the resources (if necessary), build them back up (or for
// the first time if they're new).
if tpNeedsUpdate {
if err := gce.createTargetPool(loadBalancerName, serviceName.String(), gce.region, hosts, affinityType); err != nil {
createInstances := hosts
if len(hosts) > maxTargetPoolCreateInstances {
createInstances = createInstances[:maxTargetPoolCreateInstances]
}
if err := gce.createTargetPool(loadBalancerName, serviceName.String(), gce.region, createInstances, affinityType); err != nil {
return nil, fmt.Errorf("failed to create target pool %s: %v", loadBalancerName, err)
}
glog.V(4).Infof("EnsureLoadBalancer(%v(%v)): created target pool", loadBalancerName, serviceName)
if len(hosts) <= maxTargetPoolCreateInstances {
glog.V(4).Infof("EnsureLoadBalancer(%v(%v)): created target pool", loadBalancerName, serviceName)
} else {
glog.V(4).Infof("EnsureLoadBalancer(%v(%v)): created initial target pool (now updating with %d hosts)", loadBalancerName, serviceName, len(hosts)-maxTargetPoolCreateInstances)
created := sets.NewString()
for _, host := range createInstances {
created.Insert(host.makeComparableHostPath())
}
if err := gce.updateTargetPool(loadBalancerName, created, hosts); err != nil {
return nil, fmt.Errorf("failed to update target pool %s: %v", loadBalancerName, err)
}
}
}
if tpNeedsUpdate || fwdRuleNeedsUpdate {
if err := gce.createForwardingRule(loadBalancerName, serviceName.String(), gce.region, ipAddress, ports); err != nil {
@ -1155,6 +1175,10 @@ func (gce *GCECloud) UpdateLoadBalancer(service *api.Service, hostNames []string
existing.Insert(hostURLToComparablePath(instance))
}
return gce.updateTargetPool(loadBalancerName, existing, hosts)
}
func (gce *GCECloud) updateTargetPool(loadBalancerName string, existing sets.String, hosts []*gceInstance) error {
var toAdd []*compute.InstanceReference
var toRemove []*compute.InstanceReference
for _, host := range hosts {