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Cherry-pick: Implement notifies for transfer plugin (#3972) (#4142)

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* Implement notifies for transfer plugin (#3972)

* Fix notifies in transfer plugin

Signed-off-by: Miek Gieben <miek@miek.nl>

* Make it compile

Signed-off-by: Miek Gieben <miek@miek.nl>

* Port more plugins

Signed-off-by: Miek Gieben <miek@miek.nl>

* golint

Signed-off-by: Miek Gieben <miek@miek.nl>

* Fix tests

Signed-off-by: Miek Gieben <miek@miek.nl>

* Fix notifies in transfer plugin

Signed-off-by: Miek Gieben <miek@miek.nl>

* Make it compile

Signed-off-by: Miek Gieben <miek@miek.nl>

* Port more plugins

Signed-off-by: Miek Gieben <miek@miek.nl>

* golint

Signed-off-by: Miek Gieben <miek@miek.nl>

* Fix tests

Signed-off-by: Miek Gieben <miek@miek.nl>

* Fix tests

Signed-off-by: Miek Gieben <miek@miek.nl>

* really fix test

Signed-off-by: Miek Gieben <miek@miek.nl>

* Implement ixfr fallback and unify file and auto for transfering

Signed-off-by: Miek Gieben <miek@miek.nl>

* Add transfer tests

copied and modified from #3452

Signed-off-by: Miek Gieben <miek@miek.nl>

* Test correct selection of plugin

Signed-off-by: Miek Gieben <miek@miek.nl>

* add upstream back in

Signed-off-by: Miek Gieben <miek@miek.nl>

* Implement ixfr fallback and unify file and auto for transfering

Signed-off-by: Miek Gieben <miek@miek.nl>

* fix test

Signed-off-by: Miek Gieben <miek@miek.nl>

* properly merge

Signed-off-by: Miek Gieben <miek@miek.nl>

* Remove plugin/kubernetes/setup_transfer_test.go

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

Co-authored-by: Miek Gieben <miek@miek.nl>
This commit is contained in:
Yong Tang
2020-09-24 11:30:39 -07:00
committed by GitHub
parent 279194f2e4
commit 9798dd067f
42 changed files with 705 additions and 986 deletions
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47
plugin/file/notify.go
View File

@@ -1,10 +1,8 @@
package file
import (
"fmt"
"net"
"github.com/coredns/coredns/plugin/pkg/rcode"
"github.com/coredns/coredns/request"
"github.com/miekg/dns"
@@ -33,48 +31,3 @@ func (z *Zone) isNotify(state request.Request) bool {
}
return false
}
// Notify will send notifies to all configured TransferTo IP addresses.
func (z *Zone) Notify() {
go notify(z.origin, z.TransferTo)
}
// notify sends notifies to the configured remote servers. It will try up to three times
// before giving up on a specific remote. We will sequentially loop through "to"
// until they all have replied (or have 3 failed attempts).
func notify(zone string, to []string) error {
m := new(dns.Msg)
m.SetNotify(zone)
c := new(dns.Client)
for _, t := range to {
if t == "*" {
continue
}
if err := notifyAddr(c, m, t); err != nil {
log.Error(err.Error())
}
}
log.Infof("Sent notifies for zone %q to %v", zone, to)
return nil
}
func notifyAddr(c *dns.Client, m *dns.Msg, s string) error {
var err error
code := dns.RcodeServerFailure
for i := 0; i < 3; i++ {
ret, _, err := c.Exchange(m, s)
if err != nil {
continue
}
code = ret.Rcode
if code == dns.RcodeSuccess {
return nil
}
}
if err != nil {
return fmt.Errorf("notify for zone %q was not accepted by %q: %q", m.Question[0].Name, s, err)
}
return fmt.Errorf("notify for zone %q was not accepted by %q: rcode was %q", m.Question[0].Name, s, rcode.ToString(code))
}