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Don't name 'eth0' in MASQUERADE rule

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This causes endless loops of adding duplicate rules on machines without "eth0".
This commit is contained in:
Tim Hockin 2015-08-28 22:32:30 -07:00
parent d79f53f73b
commit 1aca401813
1 changed files with 12 additions and 2 deletions
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14
pkg/kubelet/container_bridge.go
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@ -121,13 +121,23 @@ func cbr0CidrCorrect(wantCIDR *net.IPNet) bool {
// TODO(dawnchen): Using pkg/util/iptables
func ensureIPTablesMasqRule() error {
// Check if the MASQUERADE rule exist or not
if err := exec.Command("iptables", "-t", "nat", "-C", "POSTROUTING", "-o", "eth0", "-j", "MASQUERADE", "!", "-d", "10.0.0.0/8").Run(); err == nil {
if err := exec.Command("iptables",
"-t", "nat",
"-C", "POSTROUTING",
"!", "-d", "10.0.0.0/8",
"-m", "addrtype", "!", "--dst-type", "LOCAL",
"-j", "MASQUERADE").Run(); err == nil {
// The MASQUERADE rule exists
return nil
}
glog.Infof("MASQUERADE rule doesn't exist, recreate it")
if err := exec.Command("iptables", "-t", "nat", "-A", "POSTROUTING", "-o", "eth0", "-j", "MASQUERADE", "!", "-d", "10.0.0.0/8").Run(); err != nil {
if err := exec.Command("iptables",
"-t", "nat",
"-A", "POSTROUTING",
"!", "-d", "10.0.0.0/8",
"-m", "addrtype", "!", "--dst-type", "LOCAL",
"-j", "MASQUERADE").Run(); err != nil {
return err
}
return nil