Fix for default-addr-pool-mask-length param max value check
We check for max value for -default-addr-pool-mask-length param as 32.
But There won't be enough addresses on the  overlay network. Hence we are
keeping it 29 so that we would be having atleast 8 addresses in /29 network.
@@ -99,7 +99,12 @@ func validateDefaultAddrPool(defaultAddrPool []string, size uint32) error {
if size == 0 {
size = 24
}
- if size > 32 {
+ // We allow max value as 29. We can have 8 IP addresses for max value 29
+ // If we allow 30, then we will get only 4 IP addresses. But with latest
+ // libnetwork LB scale implementation, we use total of 4 IP addresses for internal use.
+ // Hence keeping 29 as max value, we will have 8 IP addresses. This will be
+ // smallest subnet that can be used in overlay network.
+ if size > 29 {
return fmt.Errorf("subnet size is out of range: %d", size)
}
for i := range defaultAddrPool {
