coredns/middleware/secondary
Miek Gieben 00f5c7797e mw/kubernetes: remove federation and cidr (#916)
* mw/kubernetes: remove federation and cidr

Remove both as we have a corefile syntax change that handles cidr and
remove federation because that is going to be its own middleware.

* backwards incompat changes

This PR:
* removes cidr from kubernetes (core Corefile feature now)
* removes federation from kubernets (comes back as new middleware)
* [remove autopath - which was already gone, so that already was
  backwards incompat]
* adds `fallthrough` to the *etcd* middleware and makes you enable it.
* Fail on unknown properties
* documentation
* Disable TestHealthCheck as it uses realtime and fails
2017-08-14 08:49:26 +01:00
..
README.md middleware/secondary: multiple fixes (#745) 2017-06-21 23:46:20 -07:00
secondary.go Fix import path github.com/miekg/coredns -> github.com/coredns/coredns (#547) 2017-02-22 06:51:47 +00:00
setup.go mw/kubernetes: remove federation and cidr (#916) 2017-08-14 08:49:26 +01:00
setup_test.go middleware/root: add it (#330) 2016-10-11 20:42:28 +01:00

secondary

secondary enables serving a zone retrieved from a primary server.

Syntax

secondary [ZONES...]
  • ZONES zones it should be authoritative for. If empty, the zones from the configuration block are used. Note that without a remote address to get the zone from, the above is not that useful.

A working syntax would be:

secondary [zones...] {
    transfer from ADDRESS
    transfer to ADDRESS
    upstream ADDRESS...
}
  • transfer from specifies from which address to fetch the zone. It can be specified multiple times; if one does not work, another will be tried.
  • transfer to can be enabled to allow this secondary zone to be transferred again.
  • upstream defines upstream resolvers to be used resolve external names found (think CNAMEs) pointing to external names. This is only really useful when CoreDNS is configured as a proxy, for normal authoritative serving you don't need or want to use this.

Examples

secondary example.org {
    transfer from 10.0.1.1
    transfer from 10.1.2.1
}