Faster eni scaleup

Author: Joseph Chen

pkg/ipamd/ipamd.go

@@ -529,7 +529,8 @@ func (c *IPAMContext) nodeInit() error {
 
 	// On node init, check if datastore pool needs to be increased. If so, attach CIDRs from existing ENIs and attach new ENIs.
 	if !c.disableENIProvisioning && c.isDatastorePoolTooLow() {
-		if err := c.increaseDatastorePool(ctx); err != nil {
+		err := c.increaseDatastorePool(ctx)
+		if err != nil {
 			// Note that the only error currently returned by increaseDatastorePool is an error attaching CIDRs (other than insufficient IPs)
 			podENIErrInc("nodeInit")
 			return errors.New("error while trying to increase datastore pool")
@@ -636,6 +637,10 @@ func (c *IPAMContext) updateIPPoolIfRequired(ctx context.Context) {
 
 	if c.isDatastorePoolTooLow() {
 		c.increaseDatastorePool(ctx)
+		// Speeds up ENI scale up
+		for c.isDatastorePoolTooLow() {
+			c.increaseDatastorePool(ctx)
+		}
 	} else if c.isDatastorePoolTooHigh() {
 		c.decreaseDatastorePool(decreaseIPPoolInterval)
 	}