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Merge pull request #37949 from selansen/master

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Fix for default-addr-pool-mask-length param max value check
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Sebastiaan van Stijn 2018-10-04 22:00:42 +02:00 • committed by GitHub
commit 192ff56d87
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1 changed files with 6 additions and 1 deletions
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7
daemon/cluster/listen_addr.go
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@ -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 {