func createCBR0(wantCIDR *net.IPNet) error {
// recreate cbr0 with wantCIDR
if err := exec.Command("brctl", "addbr", "cbr0").Run(); err != nil {
glog.Error(err)
return err
}
if err := exec.Command("ip", "addr", "add", wantCIDR.String(), "dev", "cbr0").Run(); err != nil {
glog.Error(err)
return err
}
if err := exec.Command("ip", "link", "set", "dev", "cbr0", "mtu", "1460", "up").Run(); err != nil {
glog.Error(err)
return err
}
// restart docker
// For now just log the error. The containerRuntime check will catch docker failures.
// TODO (dawnchen) figure out what we should do for rkt here.
if util.UsingSystemdInitSystem() {
if err := exec.Command("systemctl", "restart", "docker").Run(); err != nil {
glog.Error(err)
}
} else {
if err := exec.Command("service", "docker", "restart").Run(); err != nil {
glog.Error(err)
}
}
glog.V(2).Info("Recreated cbr0 and restarted docker")
return nil
}
func createCBR0(wantCIDR *net.IPNet, babysitDaemons bool) error {
// recreate cbr0 with wantCIDR
if err := exec.Command("brctl", "addbr", "cbr0").Run(); err != nil {
glog.Error(err)
return err
}
if err := exec.Command("ip", "addr", "add", wantCIDR.String(), "dev", "cbr0").Run(); err != nil {
glog.Error(err)
return err
}
if err := exec.Command("ip", "link", "set", "dev", "cbr0", "mtu", "1460", "up").Run(); err != nil {
glog.Error(err)
return err
}
// Stop docker so that babysitter process can restart it again with proper configurations and
// checkpoint file (https://github.com/docker/docker/issues/18283). It is safe to kill docker
// process here since CIDR can be changed only once for a given node object, and node is marked
// as NotReady until the docker daemon is restarted with the newly configured custom bridge.
// TODO (dawnchen): Remove this once corrupted checkpoint issue is fixed.
//
// For now just log the error. The containerRuntime check will catch docker failures.
// TODO (dawnchen) figure out what we should do for rkt here.
if babysitDaemons {
if err := exec.Command("pkill", "-KILL", "docker").Run(); err != nil {
glog.Error(err)
}
} else if util.UsingSystemdInitSystem() {
if err := exec.Command("systemctl", "restart", "docker").Run(); err != nil {
glog.Error(err)
}
} else {
if err := exec.Command("service", "docker", "restart").Run(); err != nil {
glog.Error(err)
}
}
glog.V(2).Info("Recreated cbr0 and restarted docker")
return nil
}