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885056b243
The netlink way of creating bridge has problems in older kernels like the one used on RHEL 6 (which is a supported one). So trying to use ioctl method to create bridge so that it works on any version. Signed-off-by: Jana Radhakrishnan <mrjana@docker.com>
49 lines
1.3 KiB
Go
49 lines
1.3 KiB
Go
package bridge
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import (
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"github.com/docker/docker/pkg/parsers/kernel"
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bri "github.com/docker/libcontainer/netlink"
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"github.com/vishvananda/netlink"
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)
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// SetupDevice create a new bridge interface/
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func setupDevice(config *networkConfiguration, i *bridgeInterface) error {
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var setMac bool
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// We only attempt to create the bridge when the requested device name is
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// the default one.
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if config.BridgeName != DefaultBridgeName && !config.AllowNonDefaultBridge {
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return NonDefaultBridgeExistError(config.BridgeName)
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}
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// Set the bridgeInterface netlink.Bridge.
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i.Link = &netlink.Bridge{
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LinkAttrs: netlink.LinkAttrs{
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Name: config.BridgeName,
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},
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}
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// Only set the bridge's MAC address if the kernel version is > 3.3, as it
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// was not supported before that.
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kv, err := kernel.GetKernelVersion()
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if err == nil && (kv.Kernel >= 3 && kv.Major >= 3) {
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setMac = true
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}
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return bri.CreateBridge(config.BridgeName, setMac)
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}
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// SetupDeviceUp ups the given bridge interface.
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func setupDeviceUp(config *networkConfiguration, i *bridgeInterface) error {
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err := netlink.LinkSetUp(i.Link)
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if err != nil {
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return err
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}
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// Attempt to update the bridge interface to refresh the flags status,
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// ignoring any failure to do so.
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if lnk, err := netlink.LinkByName(config.BridgeName); err == nil {
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i.Link = lnk
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}
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return nil
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}
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