144 lines
3 KiB
Go
144 lines
3 KiB
Go
package file
|
|
|
|
import (
|
|
"errors"
|
|
"os"
|
|
"path/filepath"
|
|
"time"
|
|
|
|
"github.com/coredns/caddy"
|
|
"github.com/coredns/coredns/core/dnsserver"
|
|
"github.com/coredns/coredns/plugin"
|
|
"github.com/coredns/coredns/plugin/pkg/upstream"
|
|
"github.com/coredns/coredns/plugin/transfer"
|
|
)
|
|
|
|
func init() { plugin.Register("file", setup) }
|
|
|
|
func setup(c *caddy.Controller) error {
|
|
zones, err := fileParse(c)
|
|
if err != nil {
|
|
return plugin.Error("file", err)
|
|
}
|
|
|
|
f := File{Zones: zones}
|
|
// get the transfer plugin, so we can send notifies and send notifies on startup as well.
|
|
c.OnStartup(func() error {
|
|
t := dnsserver.GetConfig(c).Handler("transfer")
|
|
if t == nil {
|
|
return nil
|
|
}
|
|
f.transfer = t.(*transfer.Transfer) // if found this must be OK.
|
|
go func() {
|
|
for _, n := range zones.Names {
|
|
f.transfer.Notify(n)
|
|
}
|
|
}()
|
|
return nil
|
|
})
|
|
|
|
c.OnRestartFailed(func() error {
|
|
t := dnsserver.GetConfig(c).Handler("transfer")
|
|
if t == nil {
|
|
return nil
|
|
}
|
|
go func() {
|
|
for _, n := range zones.Names {
|
|
f.transfer.Notify(n)
|
|
}
|
|
}()
|
|
return nil
|
|
})
|
|
|
|
for _, n := range zones.Names {
|
|
z := zones.Z[n]
|
|
c.OnShutdown(z.OnShutdown)
|
|
c.OnStartup(func() error {
|
|
z.StartupOnce.Do(func() { z.Reload(f.transfer) })
|
|
return nil
|
|
})
|
|
}
|
|
|
|
dnsserver.GetConfig(c).AddPlugin(func(next plugin.Handler) plugin.Handler {
|
|
f.Next = next
|
|
return f
|
|
})
|
|
|
|
return nil
|
|
}
|
|
|
|
func fileParse(c *caddy.Controller) (Zones, error) {
|
|
z := make(map[string]*Zone)
|
|
names := []string{}
|
|
|
|
config := dnsserver.GetConfig(c)
|
|
|
|
var openErr error
|
|
reload := 1 * time.Minute
|
|
|
|
for c.Next() {
|
|
// file db.file [zones...]
|
|
if !c.NextArg() {
|
|
return Zones{}, c.ArgErr()
|
|
}
|
|
fileName := c.Val()
|
|
|
|
origins := plugin.OriginsFromArgsOrServerBlock(c.RemainingArgs(), c.ServerBlockKeys)
|
|
if !filepath.IsAbs(fileName) && config.Root != "" {
|
|
fileName = filepath.Join(config.Root, fileName)
|
|
}
|
|
|
|
reader, err := os.Open(filepath.Clean(fileName))
|
|
if err != nil {
|
|
openErr = err
|
|
}
|
|
|
|
for i := range origins {
|
|
z[origins[i]] = NewZone(origins[i], fileName)
|
|
if openErr == nil {
|
|
reader.Seek(0, 0)
|
|
zone, err := Parse(reader, origins[i], fileName, 0)
|
|
if err != nil {
|
|
return Zones{}, err
|
|
}
|
|
z[origins[i]] = zone
|
|
}
|
|
names = append(names, origins[i])
|
|
}
|
|
|
|
for c.NextBlock() {
|
|
switch c.Val() {
|
|
case "reload":
|
|
t := c.RemainingArgs()
|
|
if len(t) < 1 {
|
|
return Zones{}, errors.New("reload duration value is expected")
|
|
}
|
|
d, err := time.ParseDuration(t[0])
|
|
if err != nil {
|
|
return Zones{}, plugin.Error("file", err)
|
|
}
|
|
reload = d
|
|
case "upstream":
|
|
// remove soon
|
|
c.RemainingArgs()
|
|
|
|
default:
|
|
return Zones{}, c.Errf("unknown property '%s'", c.Val())
|
|
}
|
|
}
|
|
|
|
for i := range origins {
|
|
z[origins[i]].ReloadInterval = reload
|
|
z[origins[i]].Upstream = upstream.New()
|
|
}
|
|
}
|
|
|
|
if openErr != nil {
|
|
if reload == 0 {
|
|
// reload hasn't been set make this a fatal error
|
|
return Zones{}, plugin.Error("file", openErr)
|
|
}
|
|
log.Warningf("Failed to open %q: trying again in %s", openErr, reload)
|
|
}
|
|
return Zones{Z: z, Names: names}, nil
|
|
}
|