Squad保留多少个历史版本？
Squad.Spec.RevisionHistoryLimit控制Squad历史版本的数量，默认为10个。
Squad扩容时创建副本是串行，还是并发创建？
Squad通过GameServerSet控制GameServer副本的数量。在增加副本时，是由多个(16) Goroutine并发创建GameServer:
func (c *Controller) addMoreGameServers(gsSet *carrierv1alpha1.GameServerSet, count int) error {
klog.Infof("Adding more gameservers: %v, count: %v", gsSet.Name, count)
return parallelize(newGameServersChannel(count, gsSet), maxCreationParalellism, func(gs *carrierv1alpha1.GameServer) error {
gameservers.ApplyDefaults(gs)
gs, err := c.gameServerGetter.GameServers(gs.Namespace).Create(gs)
if err != nil {
return errors.Wrapf(err, "error creating gameserver for gameserverset %s", gsSet.Name)
}
c.stateCache.forGameServerSet(gsSet).created(gs)
c.recorder.Eventf(gsSet, corev1.EventTypeNormal, "SuccessfulCreate", "Created gameserver: %s", gs.Name)
return nil
})
}
Squad更新时检查DeletableGates
当Squad在缩容删除GameServer地，会检查DeletableGates Condition，只有当所有DeletableGates Condition都会True时（由应用程序控制），才会删除对应的GameServer：
// IsDeletable returns false if the server is currently not deletable
func IsDeletable(gs *carrierv1alpha1.GameServer) bool {
if IsBeforeReady(gs) {
return true
}
condMap := make(map[string]carrierv1alpha1.ConditionStatus, len(gs.Status.Conditions))
for _, condition := range gs.Status.Conditions {
condMap[string(condition.Type)] = condition.Status
}
for _, gate := range gs.Spec.DeletableGates {
if v, ok := condMap[gate]; !ok || v != carrierv1alpha1.ConditionTrue {
return false
}
}
return true
}
同样，Squad支持优雅更新，当Squad做更新删除GameServer时，也会检查DeletableGates Condition。