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proxy/userspace: honor listen IP address as host IP if given

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Allows the proxier to be used on an interface that's not the default route,
otherwise hostIP gets set to the default route interface even if that's
not what the user intended.

If listen IP isn't given, falls back to previous behavior.
This commit is contained in:
Dan Williams 2017-07-07 11:17:17 -05:00
parent a9bf44101b
commit 8a58f62fe0
1 changed files with 9 additions and 3 deletions
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12
pkg/proxy/userspace/proxier.go
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@ -166,9 +166,15 @@ func NewCustomProxier(loadBalancer LoadBalancer, listenIP net.IP, iptables iptab
return nil, ErrProxyOnLocalhost
}
hostIP, err := utilnet.ChooseHostInterface()
if err != nil {
return nil, fmt.Errorf("failed to select a host interface: %v", err)
// If listenIP is given, assume that is the intended host IP. Otherwise
// try to find a suitable host IP address from network interfaces.
var err error
hostIP := listenIP
if hostIP.Equal(net.IPv4zero) {
hostIP, err = utilnet.ChooseHostInterface()
if err != nil {
return nil, fmt.Errorf("failed to select a host interface: %v", err)
}
}
err = setRLimit(64 * 1000)