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Extend MaintenanceWindows parameter usage (#2810)

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Consider maintenance window when migrating master pods and replacing pods (rolling update)
This commit is contained in:
Polina Bungina
2025-01-15 18:04:36 +01:00
committed by GitHub
parent 46d5ebef6d
commit 8522331cf2
11 changed files with 168 additions and 30 deletions
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pkg/cluster/cluster.go
+42 -2
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@@ -1731,18 +1731,58 @@ func (c *Cluster) GetStatus() *ClusterStatus {
return status
}
func (c *Cluster) GetSwitchoverSchedule() string {
var possibleSwitchover, schedule time.Time
now := time.Now().UTC()
for _, window := range c.Spec.MaintenanceWindows {
// in the best case it is possible today
possibleSwitchover = time.Date(now.Year(), now.Month(), now.Day(), window.StartTime.Hour(), window.StartTime.Minute(), 0, 0, time.UTC)
if window.Everyday {
if now.After(possibleSwitchover) {
// we are already past the time for today, try tomorrow
possibleSwitchover = possibleSwitchover.AddDate(0, 0, 1)
}
} else {
if now.Weekday() != window.Weekday {
// get closest possible time for this window
possibleSwitchover = possibleSwitchover.AddDate(0, 0, int((7+window.Weekday-now.Weekday())%7))
} else if now.After(possibleSwitchover) {
// we are already past the time for today, try next week
possibleSwitchover = possibleSwitchover.AddDate(0, 0, 7)
}
}
if (schedule == time.Time{}) || possibleSwitchover.Before(schedule) {
schedule = possibleSwitchover
}
}
return schedule.Format("2006-01-02T15:04+00")
}
// Switchover does a switchover (via Patroni) to a candidate pod
func (c *Cluster) Switchover(curMaster *v1.Pod, candidate spec.NamespacedName) error {
var err error
c.logger.Debugf("switching over from %q to %q", curMaster.Name, candidate)
if !isInMaintenanceWindow(c.Spec.MaintenanceWindows) {
c.logger.Infof("postponing switchover, not in maintenance window")
schedule := c.GetSwitchoverSchedule()
if err := c.patroni.Switchover(curMaster, candidate.Name, schedule); err != nil {
return fmt.Errorf("could not schedule switchover: %v", err)
}
c.logger.Infof("switchover is scheduled at %s", schedule)
return nil
}
c.eventRecorder.Eventf(c.GetReference(), v1.EventTypeNormal, "Switchover", "Switching over from %q to %q", curMaster.Name, candidate)
stopCh := make(chan struct{})
ch := c.registerPodSubscriber(candidate)
defer c.unregisterPodSubscriber(candidate)
defer close(stopCh)
if err = c.patroni.Switchover(curMaster, candidate.Name); err == nil {
if err = c.patroni.Switchover(curMaster, candidate.Name, ""); err == nil {
c.logger.Debugf("successfully switched over from %q to %q", curMaster.Name, candidate)
c.eventRecorder.Eventf(c.GetReference(), v1.EventTypeNormal, "Switchover", "Successfully switched over from %q to %q", curMaster.Name, candidate)
_, err = c.waitForPodLabel(ch, stopCh, nil)