func populateListeningURL() {
host, err := netutil.FullyQualifiedHostname()
if err != nil {
host, err = os.Hostname()
if err != nil {
log.Fatalf("os.Hostname() failed: %v", err)
}
}
ListeningURL = url.URL{
Scheme: "http",
Host: fmt.Sprintf("%v:%v", host, *Port),
Path: "/",
}
}
// bindAddr: the address for the query service advertised by this agent
func (agent *ActionAgent) Start(mysqlPort, vtPort, vtsPort int) error {
var err error
if err = agent.readTablet(); err != nil {
return err
}
// find our hostname as fully qualified, and IP
hostname := *tabletHostname
if hostname == "" {
hostname, err = netutil.FullyQualifiedHostname()
if err != nil {
return err
}
}
ipAddrs, err := net.LookupHost(hostname)
if err != nil {
return err
}
ipAddr := ipAddrs[0]
// Update bind addr for mysql and query service in the tablet node.
f := func(tablet *topo.Tablet) error {
tablet.Hostname = hostname
tablet.IPAddr = ipAddr
if tablet.Portmap == nil {
tablet.Portmap = make(map[string]int)
}
if mysqlPort != 0 {
// only overwrite mysql port if we know it, otherwise
// leave it as is.
tablet.Portmap["mysql"] = mysqlPort
}
tablet.Portmap["vt"] = vtPort
if vtsPort != 0 {
tablet.Portmap["vts"] = vtsPort
} else {
delete(tablet.Portmap, "vts")
}
return nil
}
if err := agent.TopoServer.UpdateTabletFields(agent.Tablet().Alias, f); err != nil {
return err
}
// Reread to get the changes we just made
if err := agent.readTablet(); err != nil {
return err
}
if err = agent.verifyTopology(); err != nil {
return err
}
if err = agent.verifyServingAddrs(); err != nil {
return err
}
oldTablet := &topo.Tablet{}
if err = agent.updateState(context.TODO(), oldTablet, "Start"); err != nil {
log.Warningf("Initial updateState failed, will need a state change before running properly: %v", err)
}
return nil
}