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Change kubelet update frequency to 2s, and make it a constant.

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This commit is contained in:
Deyuan Deng
2015-03-13 20:59:25 -04:00
committed by Deyuan Deng
parent 0d5f8dfde1
commit cf548765c9
3 changed files with 27 additions and 24 deletions
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18
pkg/cloudprovider/controller/nodecontroller.go
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@@ -39,8 +39,12 @@ const (
// sync node status in this case, but will monitor node status updated from kubelet. If
// it doesn't receive update for this amount of time, it will start posting node NotReady
// condition. The amount of time when NodeController start evicting pods is controlled
// via flag 'pod_eviction_timeout'.
// via flag 'pod_eviction_timeout'. Note: be cautious when changing nodeMonitorGracePeriod,
// it must work with kubelet.nodeStatusUpdateFrequency.
nodeMonitorGracePeriod = 8 * time.Second
// The constant is used if sync_nodes_status=False, and for node startup. When node
// is just created, e.g. cluster bootstrap or node creation, we give a longer grace period.
nodeStartupGracePeriod = 30 * time.Second
// The constant is used if sync_nodes_status=False. It controls NodeController monitoring
// period, i.e. how often does NodeController check node status posted from kubelet.
// Theoretically, this value should be lower than nodeMonitorGracePeriod.
@@ -412,12 +416,18 @@ func (s *NodeController) MonitorNodeStatus() error {
}
for i := range nodes.Items {
node := &nodes.Items[i]
// Precompute condition times to avoid deep copy of node status (We'll modify node for updating,
// and NodeStatus.Conditions is an array, which makes assignment copy not useful).
// Precompute all condition times to avoid deep copy of node status (We'll modify node for
// updating, and NodeStatus.Conditions is an array, which makes assignment copy not useful).
latestConditionTime := s.latestConditionTime(node, api.NodeReady)
var gracePeriod time.Duration
if latestConditionTime == node.CreationTimestamp {
gracePeriod = nodeStartupGracePeriod
} else {
gracePeriod = nodeMonitorGracePeriod
}
latestFullConditionTime := s.latestConditionTimeWithStatus(node, api.NodeReady, api.ConditionFull)
// Grace period has passed, post node NotReady condition to master, without contacting kubelet.
if util.Now().After(latestConditionTime.Add(nodeMonitorGracePeriod)) {
if util.Now().After(latestConditionTime.Add(gracePeriod)) {
readyCondition := s.getCondition(node, api.NodeReady)
if readyCondition == nil {
node.Status.Conditions = append(node.Status.Conditions, api.NodeCondition{