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
74 lines
1.6 KiB
Go
74 lines
1.6 KiB
Go
package file
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import (
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"os"
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"time"
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)
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// TickTime is clock resolution. By default ticks every second. Handler checks if reloadInterval has been reached on every tick.
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var TickTime = 1 * time.Second
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// Reload reloads a zone when it is changed on disk. If z.NoRoload is true, no reloading will be done.
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func (z *Zone) Reload() error {
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if z.ReloadInterval == 0 {
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return nil
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}
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tick := time.NewTicker(TickTime)
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go func() {
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for {
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select {
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case <-tick.C:
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if z.LastReloaded.Add(z.ReloadInterval).After(time.Now()) {
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//reload interval not reached yet
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continue
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}
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//saving timestamp of last attempted reload
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z.LastReloaded = time.Now()
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zFile := z.File()
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reader, err := os.Open(zFile)
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if err != nil {
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log.Errorf("Failed to open zone %q in %q: %v", z.origin, zFile, err)
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continue
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}
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serial := z.SOASerialIfDefined()
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zone, err := Parse(reader, z.origin, zFile, serial)
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if err != nil {
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if _, ok := err.(*serialErr); !ok {
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log.Errorf("Parsing zone %q: %v", z.origin, err)
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}
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continue
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}
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// copy elements we need
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z.reloadMu.Lock()
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z.Apex = zone.Apex
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z.Tree = zone.Tree
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z.reloadMu.Unlock()
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log.Infof("Successfully reloaded zone %q in %q with serial %d", z.origin, zFile, z.Apex.SOA.Serial)
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z.Notify()
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case <-z.reloadShutdown:
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tick.Stop()
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return
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}
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}
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}()
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return nil
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}
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// SOASerialIfDefined returns the SOA's serial if the zone has a SOA record in the Apex, or
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// -1 otherwise.
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func (z *Zone) SOASerialIfDefined() int64 {
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z.reloadMu.Lock()
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defer z.reloadMu.Unlock()
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if z.Apex.SOA != nil {
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return int64(z.Apex.SOA.Serial)
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}
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return -1
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}
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