loadbalance

README

loadbalance

loadbalance acts as a round-robin DNS loadbalancer by randomizing A and AAAA records in the message. See Wikipedia about the pros and cons on this setup.

It will take care to sort any CNAMEs before any address records.

Syntax

loadbalance [policy]

• policy is how to balance, the default is "round_robin"

Examples

loadbalance round_robin

Documentation

Overview

Package loadbalance is middleware for rewriting responses to do "load balancing"

Index

• type RoundRobin
  • func (rr RoundRobin) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, error)
• type RoundRobinResponseWriter
  • func NewRoundRobinResponseWriter(w dns.ResponseWriter) *RoundRobinResponseWriter
  • func (r *RoundRobinResponseWriter) Hijack()
  • func (r *RoundRobinResponseWriter) Write(buf []byte) (int, error)
  • func (r *RoundRobinResponseWriter) WriteMsg(res *dns.Msg) error

Types

type RoundRobin

type RoundRobin struct {
	Next middleware.Handler
}

RoundRobin is middleware to rewrite responses for "load balancing".

func (RoundRobin) ServeDNS

func (rr RoundRobin) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, error)

ServeDNS implements the middleware.Handler interface.

type RoundRobinResponseWriter

type RoundRobinResponseWriter struct {
	dns.ResponseWriter
}

func NewRoundRobinResponseWriter

func NewRoundRobinResponseWriter(w dns.ResponseWriter) *RoundRobinResponseWriter

func (*RoundRobinResponseWriter) Hijack

func (r *RoundRobinResponseWriter) Hijack()

func (*RoundRobinResponseWriter) Write

func (r *RoundRobinResponseWriter) Write(buf []byte) (int, error)

Should we pack and unpack here to fiddle with the packet... Not likely.

func (*RoundRobinResponseWriter) WriteMsg

func (r *RoundRobinResponseWriter) WriteMsg(res *dns.Msg) error