// IPAddr returns the IP address for this instance
func (mysqld *Mysqld) IPAddr() string {
addr, err := netutil.ResolveIpAddr(mysqld.Addr())
if err != nil {
panic(err) // should never happen
}
return addr
}
// resolveZkAddr takes a comma-separated list of host:post addresses,
// and resolves the host to replace it with the IP address.
// If a resolution fails, the host is skipped.
// If no host can be resolved, an error is returned.
// This is different fromt he zookeeper C library, that insists on resolving
// *all* hosts before it starts.
func resolveZkAddr(zkAddr string) (string, error) {
parts := strings.Split(zkAddr, ",")
resolved := make([]string, 0, len(parts))
for _, part := range parts {
if r, err := netutil.ResolveIpAddr(part); err != nil {
log.Infof("cannot resolve %v, will not use it: %v", part, err)
} else {
resolved = append(resolved, r)
}
}
if len(resolved) == 0 {
return "", fmt.Errorf("no valid address found in %v", zkAddr)
}
return strings.Join(resolved, ","), nil
}
// bindAddr: the address for the query service advertised by this agent
func (agent *ActionAgent) Start(bindAddr, secureAddr, mysqlAddr string) error {
var err error
if err = agent.readTablet(); err != nil {
return err
}
if err = agent.resolvePaths(); err != nil {
return err
}
bindAddr, err = netutil.ResolveAddr(bindAddr)
if err != nil {
return err
}
if secureAddr != "" {
secureAddr, err = netutil.ResolveAddr(secureAddr)
if err != nil {
return err
}
}
mysqlAddr, err = netutil.ResolveAddr(mysqlAddr)
if err != nil {
return err
}
mysqlIpAddr, err := netutil.ResolveIpAddr(mysqlAddr)
if err != nil {
return err
}
// Update bind addr for mysql and query service in the tablet node.
f := func(tablet *topo.Tablet) error {
tablet.Addr = bindAddr
tablet.SecureAddr = secureAddr
tablet.MysqlAddr = mysqlAddr
tablet.MysqlIpAddr = mysqlIpAddr
return nil
}
if err := agent.ts.UpdateTabletFields(agent.Tablet().Alias(), f); err != nil {
return err
}
// Reread in case there were changes
if err := agent.readTablet(); err != nil {
return err
}
hostname, err := os.Hostname()
if err != nil {
return fmt.Errorf("agent.Start: cannot get hostname: %v", err)
}
data := fmt.Sprintf("host:%v\npid:%v\n", hostname, os.Getpid())
if err := agent.ts.CreateTabletPidNode(agent.tabletAlias, data, agent.done); err != nil {
return err
}
if err = agent.verifyTopology(); err != nil {
return err
}
if err = agent.verifyServingAddrs(); err != nil {
return err
}
oldTablet := &topo.Tablet{}
agent.runChangeCallbacks(oldTablet, "Start")
go agent.actionEventLoop()
return nil
}