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Add check for IPv6 '::' when calculating kube-proxy's node IP

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kube-proxy currently checks for a bind address of 0.0.0.0 (IPv4 all-zeros)
when calculating kube-proxy's node IP, but it does not check for
an address of '::' (IPv6 all-zeros). For either of those all-zeros
addresses, the node IP should be determined based on the hostname,
rather than using the address directly.

Also added a helpful log message when the kube-proxy protocol is
determined to be IPv6.

fixes #52613
This commit is contained in:
Dane LeBlanc
2017-09-17 13:42:09 -04:00
parent e381a737fe
commit 6d71eb590b
3 changed files with 59 additions and 9 deletions
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2
pkg/proxy/userspace/proxier.go
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@@ -942,7 +942,7 @@ func iptablesFlush(ipt iptables.Interface) error {
var zeroIPv4 = net.ParseIP("0.0.0.0")
var localhostIPv4 = net.ParseIP("127.0.0.1")
var zeroIPv6 = net.ParseIP("::0")
var zeroIPv6 = net.ParseIP("::")
var localhostIPv6 = net.ParseIP("::1")
// Build a slice of iptables args that are common to from-container and from-host portal rules.