// scale a node down a certain number of instances
func (operation *ScaleOperation) ScaleDownNumber(logger log.Log, instances libs.Instances, number int) int {
count := 0
instancesOrder := []string{}
for _, instanceId := range instances.InstancesOrder() {
instancesOrder = append([]string{instanceId}, instancesOrder...)
}
InstanceScaleReturn:
for _, instanceId := range instancesOrder {
if instance, ok := instances.Instance(instanceId); ok {
client := instance.Client()
if !client.IsRunning() {
continue InstanceScaleReturn
}
logger.Info("Node Scaling down. Stopping instance :" + instanceId)
client.Stop(logger, operation.force, operation.timeout)
if operation.removeStopped {
client.Remove(logger, operation.force)
}
count++
if count >= number {
return count
}
}
}
return count
}
// scale a node up a certain number of instances
func (operation *ScaleOperation) ScaleUpNumber(logger log.Log, instances libs.Instances, number int) int {
count := 0
instancesOrder := instances.InstancesOrder()
InstanceScaleReturn:
for _, instanceId := range instancesOrder {
if instance, ok := instances.Instance(instanceId); ok {
client := instance.Client()
if client.IsRunning() {
continue InstanceScaleReturn
} else if !client.HasContainer() {
// create a new container for this instance
client.Create(logger, []string{}, false)
}
logger.Info("Node Scaling up. Starting instance :" + instanceId)
client.Start(logger, false)
count++
if count >= number {
return count
}
}
}
return count
}