ErrPortZero is returned by the resolve machinery when a DNS resolver returns an SRV record with its port set to zero.
var ErrPortZero = errors.New("resolver returned SRV record with port 0")
Instancer yields instances from the named DNS SRV record. The name is resolved on a fixed schedule. Priorities and weights are ignored.
type Instancer struct {
// contains filtered or unexported fields
}
func NewInstancer(
name string,
ttl time.Duration,
logger log.Logger,
) *Instancer
NewInstancer returns a DNS SRV instancer.
func NewInstancerDetailed(
name string,
refresh *time.Ticker,
lookup Lookup,
logger log.Logger,
) *Instancer
NewInstancerDetailed is the same as NewInstancer, but allows users to provide an explicit lookup refresh ticker instead of a TTL, and specify the lookup function instead of using net.LookupSRV.
func (in *Instancer) Deregister(ch chan<- sd.Event)
Deregister implements Instancer.
func (in *Instancer) Register(ch chan<- sd.Event)
Register implements Instancer.
func (in *Instancer) Stop()
Stop terminates the Instancer.
Lookup is a function that resolves a DNS SRV record to multiple addresses. It has the same signature as net.LookupSRV.
type Lookup func(service, proto, name string) (cname string, addrs []*net.SRV, err error)