552aab723c
* Configurable zone reload interval in file plugin * passing reload config from auto plugin to file plugin. removed noReload property from Zone struct. fixed tests based on short file reload hack
109 lines
2.2 KiB
Go
109 lines
2.2 KiB
Go
package auto
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import (
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"os"
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"path"
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"path/filepath"
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"regexp"
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"github.com/coredns/coredns/plugin/file"
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"github.com/miekg/dns"
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)
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// Walk will recursively walk of the file under l.directory and adds the one that match l.re.
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func (a Auto) Walk() error {
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// TODO(miek): should add something so that we don't stomp on each other.
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toDelete := make(map[string]bool)
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for _, n := range a.Zones.Names() {
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toDelete[n] = true
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}
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filepath.Walk(a.loader.directory, func(path string, info os.FileInfo, err error) error {
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if info == nil || info.IsDir() {
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return nil
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}
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match, origin := matches(a.loader.re, info.Name(), a.loader.template)
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if !match {
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return nil
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}
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if z, ok := a.Zones.Z[origin]; ok {
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// we already have this zone
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toDelete[origin] = false
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z.SetFile(path)
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return nil
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}
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reader, err := os.Open(path)
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if err != nil {
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log.Warningf("Opening %s failed: %s", path, err)
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return nil
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}
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defer reader.Close()
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// Serial for loading a zone is 0, because it is a new zone.
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zo, err := file.Parse(reader, origin, path, 0)
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if err != nil {
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log.Warningf("Parse zone `%s': %v", origin, err)
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return nil
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}
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zo.ReloadInterval = a.loader.ReloadInterval
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zo.Upstream = a.loader.upstream
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zo.TransferTo = a.loader.transferTo
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a.Zones.Add(zo, origin)
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if a.metrics != nil {
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a.metrics.AddZone(origin)
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}
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zo.Notify()
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log.Infof("Inserting zone `%s' from: %s", origin, path)
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toDelete[origin] = false
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return nil
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})
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for origin, ok := range toDelete {
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if !ok {
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continue
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}
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if a.metrics != nil {
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a.metrics.RemoveZone(origin)
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}
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a.Zones.Remove(origin)
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log.Infof("Deleting zone `%s'", origin)
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}
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return nil
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}
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// matches matches re to filename, if is is a match, the subexpression will be used to expand
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// template to an origin. When match is true that origin is returned. Origin is fully qualified.
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func matches(re *regexp.Regexp, filename, template string) (match bool, origin string) {
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base := path.Base(filename)
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matches := re.FindStringSubmatchIndex(base)
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if matches == nil {
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return false, ""
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}
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by := re.ExpandString(nil, template, base, matches)
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if by == nil {
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return false, ""
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}
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origin = dns.Fqdn(string(by))
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return true, origin
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}
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