c961acbb6e
Respond to notifies and allow a secondary to follow the SOA parameters to update a zone from a primary. Also sprinkle it with logging. Also extend monitoring to include qtype in more metrics.
72 lines
1.7 KiB
Go
72 lines
1.7 KiB
Go
package setup
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import (
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"github.com/miekg/coredns/middleware"
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"github.com/miekg/coredns/middleware/file"
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"github.com/miekg/coredns/middleware/secondary"
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)
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// Secondary sets up the secondary middleware.
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func Secondary(c *Controller) (middleware.Middleware, error) {
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zones, err := secondaryParse(c)
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if err != nil {
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return nil, err
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}
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// Add startup functions to retrieve the zone and keep it up to date.
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for _, n := range zones.Names {
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if len(zones.Z[n].TransferFrom) > 0 {
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c.Startup = append(c.Startup, func() error {
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err := zones.Z[n].TransferIn()
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return err
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})
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c.Startup = append(c.Startup, func() error {
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go func() {
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zones.Z[n].Update()
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}()
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return nil
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})
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}
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}
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return func(next middleware.Handler) middleware.Handler {
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return secondary.Secondary{file.File{Next: next, Zones: zones}}
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}, nil
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}
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func secondaryParse(c *Controller) (file.Zones, error) {
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z := make(map[string]*file.Zone)
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names := []string{}
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for c.Next() {
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if c.Val() == "secondary" {
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// secondary [origin]
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origins := []string{c.ServerBlockHosts[c.ServerBlockHostIndex]}
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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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for i, _ := range origins {
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origins[i] = middleware.Host(origins[i]).Normalize()
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z[origins[i]] = file.NewZone(origins[i])
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names = append(names, origins[i])
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}
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for c.NextBlock() {
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t, f, e := parseTransfer(c)
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if e != nil {
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return file.Zones{}, e
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}
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for _, origin := range origins {
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if t != "" {
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z[origin].TransferTo = append(z[origin].TransferTo, t)
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}
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if f != "" {
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z[origin].TransferFrom = append(z[origin].TransferFrom, f)
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}
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}
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}
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}
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}
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return file.Zones{Z: z, Names: names}, nil
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}
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