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Merge pull request #1396 from mrjana/lb

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Add a narrower SNAT rule for LB egress
This commit is contained in:
Santhosh Manohar 2016-08-15 16:17:39 -07:00 • committed by GitHub
commit 2ff23178a0
1 changed files with 8 additions and 2 deletions
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10
libnetwork/service_linux.go
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@ -647,7 +647,7 @@ func invokeFWMarker(path string, vip net.IP, fwMark uint32, ingressPorts []*Port
cmd := &exec.Cmd{
Path: reexec.Self(),
Args: append([]string{"fwmarker"}, path, vip.String(), fmt.Sprintf("%d", fwMark), addDelOpt, ingressPortsFile, eIP.IP.String()),
Args: append([]string{"fwmarker"}, path, vip.String(), fmt.Sprintf("%d", fwMark), addDelOpt, ingressPortsFile, eIP.String()),
Stdout: os.Stdout,
Stderr: os.Stderr,
}
@ -719,7 +719,13 @@ func fwMarker() {
}
if addDelOpt == "-A" {
ruleParams := strings.Fields(fmt.Sprintf("-m ipvs --ipvs -j SNAT --to-source %s", os.Args[6]))
eIP, subnet, err := net.ParseCIDR(os.Args[6])
if err != nil {
logrus.Errorf("Failed to parse endpoint IP %s: %v", os.Args[6], err)
os.Exit(9)
}
ruleParams := strings.Fields(fmt.Sprintf("-m ipvs --ipvs -d %s -j SNAT --to-source %s", subnet, eIP))
if !iptables.Exists("nat", "POSTROUTING", ruleParams...) {
rule := append(strings.Fields("-t nat -A POSTROUTING"), ruleParams...)
rules = append(rules, rule)