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kubelet: allow specifying dual-stack node IPs on bare metal

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Discussion is ongoing about how to best handle dual-stack with clouds
and autodetected IPs, but there is at least agreement that people on
bare metal ought to be able to specify two explicit IPs on dual-stack
hosts, so allow that.
This commit is contained in:
Dan Winship
2020-09-29 20:47:24 -04:00
parent 2680095414
commit 75242fce7a
10 changed files with 136 additions and 23 deletions
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4
pkg/kubelet/kubelet_network_linux.go
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@@ -35,9 +35,9 @@ func (kl *Kubelet) initNetworkUtil() {
exec := utilexec.New()
// At this point in startup we don't know the actual node IPs, so we configure dual stack iptables
// rules if the node _might_ be dual-stack, and single-stack based on requested nodeIP otherwise.
// rules if the node _might_ be dual-stack, and single-stack based on requested nodeIPs[0] otherwise.
maybeDualStack := utilfeature.DefaultFeatureGate.Enabled(features.IPv6DualStack)
ipv6Primary := kl.nodeIP != nil && utilnet.IsIPv6(kl.nodeIP)
ipv6Primary := kl.nodeIPs != nil && utilnet.IsIPv6(kl.nodeIPs[0])
var iptClients []utiliptables.Interface
if maybeDualStack || !ipv6Primary {