func NewHTTPBooter(listenAddr net.TCPAddr, ldlinux []byte,
ds datasource.DataSource, webPort int) (*HTTPBooter, error) {
bootMessageVersionedTemplate := strings.Replace(bootMessageTemplate,
"$VERSION", ds.SelfInfo().Version, -1)
bootMessageVersionedTemplate = strings.Replace(bootMessageTemplate,
"$HOST", ds.SelfInfo().IP.String(), -1)
booter := &HTTPBooter{
listenAddr: listenAddr,
ldlinux: ldlinux,
datasource: ds,
webPort: webPort,
bootMessageTemplate: bootMessageVersionedTemplate,
}
return booter, nil
}
// StartDHCP ListenAndServe for dhcp on port 67, binds on interface=ifName if it's
// not empty
func StartDHCP(ifName string, serverIP net.IP, datasource datasource.DataSource) error {
handler := &Handler{
ifName: ifName,
serverIP: serverIP,
datasource: datasource,
bootMessage: fmt.Sprintf("Blacksmith (%s)", datasource.SelfInfo().Version),
}
log.WithFields(log.Fields{
"where": "dhcp.StartDHCP",
"action": "announce",
}).Infof("Listening on %s:67 (interface: %s)", serverIP.String(), ifName)
var err error
if ifName != "" {
err = dhcp4.ListenAndServeIf(ifName, handler)
} else {
err = dhcp4.ListenAndServe(handler)
}
// https://groups.google.com/forum/#!topic/coreos-user/Qbn3OdVtrZU
if len(datasource.ClusterName()) > 50 { // 63 - 12(mac) - 1(.)
log.WithField("where", "dhcp.StartDHCP").Warn(
"Warning: ClusterName is too long. It may break the behaviour of the DHCP clients")
}
rand.Seed(time.Now().UTC().UnixNano())
return err
}