0b35d4d28f
* Add reload directive * gofmt * Fix default jitter and error message * remove unneeded call to NextArg, add a couple negative setup tests * Review feedback
72 lines
1.1 KiB
Go
72 lines
1.1 KiB
Go
package reload
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import (
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"math/rand"
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"sync"
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"time"
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"github.com/coredns/coredns/plugin"
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"github.com/mholt/caddy"
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)
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func init() {
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caddy.RegisterPlugin("reload", caddy.Plugin{
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ServerType: "dns",
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Action: setup,
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})
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}
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var r *reload
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var once sync.Once
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func setup(c *caddy.Controller) error {
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c.Next() // 'reload'
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args := c.RemainingArgs()
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if len(args) > 2 {
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return plugin.Error("reload", c.ArgErr())
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}
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i := defaultInterval
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if len(args) > 0 {
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d, err := time.ParseDuration(args[0])
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if err != nil {
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return err
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}
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i = d
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}
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j := defaultJitter
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if len(args) > 1 {
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d, err := time.ParseDuration(args[1])
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if err != nil {
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return err
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}
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j = d
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}
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if j > i/2 {
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j = i / 2
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}
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jitter := time.Duration(rand.Int63n(j.Nanoseconds()) - (j.Nanoseconds() / 2))
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i = i + jitter
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r = &reload{interval: i, quit: make(chan bool)}
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once.Do(func() {
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caddy.RegisterEventHook("reload", hook)
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})
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c.OnFinalShutdown(func() error {
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r.quit <- true
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return nil
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})
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return nil
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}
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const (
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defaultInterval = 30 * time.Second
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defaultJitter = 15 * time.Second
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)
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