ITQC/containernetworking-plugins
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Merge pull request #175.

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This commit is contained in:
Stefan Junker 2016-05-19 12:07:30 +02:00
commit 74790e55ef
2 changed files with 14 additions and 6 deletions
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2
Documentation/bridge.md
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@ -19,6 +19,7 @@ If the bridge is missing, the plugin will create one on first use and, if gatewa
"bridge": "mynet0",
"isGateway": true,
"ipMasq": true,
"hairpinMode": true,
"ipam": {
"type": "host-local",
"subnet": "10.10.0.0/16"
@ -34,4 +35,5 @@ If the bridge is missing, the plugin will create one on first use and, if gatewa
* `isGateway` (boolean, optional): assign an IP address to the bridge. Defaults to false.
* `ipMasq` (boolean, optional): set up IP Masquerade on the host for traffic originating from this network and destined outside of it. Defaults to false.
* `mtu` (integer, optional): explicitly set MTU to the specified value. Defaults to the value chosen by the kernel.
* `hairpinMode` (boolean, optional): set hairpin mode for interfaces on the bridge. Defaults to false.
* `ipam` (dictionary, required): IPAM configuration to be used for this network.

18
plugins/main/bridge/bridge.go
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@ -36,10 +36,11 @@ const defaultBrName = "cni0"
type NetConf struct {
types.NetConf
BrName string `json:"bridge"`
IsGW bool `json:"isGateway"`
IPMasq bool `json:"ipMasq"`
MTU int `json:"mtu"`
BrName string `json:"bridge"`
IsGW bool `json:"isGateway"`
IPMasq bool `json:"ipMasq"`
MTU int `json:"mtu"`
HairpinMode bool `json:"hairpinMode"`
}
func init() {
@ -123,7 +124,7 @@ func ensureBridge(brName string, mtu int) (*netlink.Bridge, error) {
return br, nil
}
func setupVeth(netns string, br *netlink.Bridge, ifName string, mtu int) error {
func setupVeth(netns string, br *netlink.Bridge, ifName string, mtu int, hairpinMode bool) error {
var hostVethName string
err := ns.WithNetNSPath(netns, false, func(hostNS *os.File) error {
@ -151,6 +152,11 @@ func setupVeth(netns string, br *netlink.Bridge, ifName string, mtu int) error {
return fmt.Errorf("failed to connect %q to bridge %v: %v", hostVethName, br.Attrs().Name, err)
}
// set hairpin mode
if err = netlink.LinkSetHairpin(hostVeth, hairpinMode); err != nil {
return fmt.Errorf("failed to setup hairpin mode for %v: %v", hostVethName, err)
}
return nil
}
@ -180,7 +186,7 @@ func cmdAdd(args *skel.CmdArgs) error {
return err
}
if err = setupVeth(args.Netns, br, args.IfName, n.MTU); err != nil {
if err = setupVeth(args.Netns, br, args.IfName, n.MTU, n.HairpinMode); err != nil {
return err
}