144 lines
2.9 KiB
Go
144 lines
2.9 KiB
Go
package file
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import (
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"os"
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"path/filepath"
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"time"
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"github.com/coredns/coredns/core/dnsserver"
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"github.com/coredns/coredns/plugin"
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"github.com/coredns/coredns/plugin/pkg/parse"
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"github.com/coredns/coredns/plugin/pkg/upstream"
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"github.com/caddyserver/caddy"
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)
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func init() { plugin.Register("file", setup) }
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func setup(c *caddy.Controller) error {
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zones, err := fileParse(c)
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if err != nil {
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return plugin.Error("file", err)
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}
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// Add startup functions to notify the master(s).
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for _, n := range zones.Names {
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z := zones.Z[n]
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c.OnStartup(func() error {
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z.StartupOnce.Do(func() {
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if len(z.TransferTo) > 0 {
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z.Notify()
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}
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z.Reload()
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})
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return nil
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})
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}
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for _, n := range zones.Names {
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z := zones.Z[n]
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c.OnShutdown(z.OnShutdown)
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}
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dnsserver.GetConfig(c).AddPlugin(func(next plugin.Handler) plugin.Handler {
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return File{Next: next, Zones: zones}
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})
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return nil
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}
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func fileParse(c *caddy.Controller) (Zones, error) {
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z := make(map[string]*Zone)
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names := []string{}
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config := dnsserver.GetConfig(c)
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var openErr error
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reload := 1 * time.Minute
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for c.Next() {
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// file db.file [zones...]
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if !c.NextArg() {
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return Zones{}, c.ArgErr()
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}
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fileName := c.Val()
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origins := make([]string, len(c.ServerBlockKeys))
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copy(origins, c.ServerBlockKeys)
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args := c.RemainingArgs()
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if len(args) > 0 {
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origins = args
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}
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if !filepath.IsAbs(fileName) && config.Root != "" {
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fileName = filepath.Join(config.Root, fileName)
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}
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reader, err := os.Open(fileName)
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if err != nil {
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openErr = err
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}
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for i := range origins {
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origins[i] = plugin.Host(origins[i]).Normalize()
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z[origins[i]] = NewZone(origins[i], fileName)
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if openErr == nil {
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reader.Seek(0, 0)
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zone, err := Parse(reader, origins[i], fileName, 0)
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if err == nil {
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z[origins[i]] = zone
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} else {
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return Zones{}, err
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}
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}
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names = append(names, origins[i])
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}
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t := []string{}
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var e error
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for c.NextBlock() {
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switch c.Val() {
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case "transfer":
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t, _, e = parse.Transfer(c, false)
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if e != nil {
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return Zones{}, e
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}
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case "reload":
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d, err := time.ParseDuration(c.RemainingArgs()[0])
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if err != nil {
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return Zones{}, plugin.Error("file", err)
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}
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reload = d
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case "upstream":
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// remove soon
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c.RemainingArgs()
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default:
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return Zones{}, c.Errf("unknown property '%s'", c.Val())
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}
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for _, origin := range origins {
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if t != nil {
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z[origin].TransferTo = append(z[origin].TransferTo, t...)
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}
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}
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}
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}
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for origin := range z {
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z[origin].ReloadInterval = reload
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z[origin].Upstream = upstream.New()
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}
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if openErr != nil {
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if reload == 0 {
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// reload hasn't been set make this a fatal error
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return Zones{}, plugin.Error("file", openErr)
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}
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log.Warningf("Failed to open %q: trying again in %s", openErr, reload)
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}
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return Zones{Z: z, Names: names}, nil
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}
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