1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
package health
import (
"fmt"
"net"
"time"
"github.com/coredns/caddy"
"github.com/coredns/coredns/plugin"
)
func init() { plugin.Register("health", setup) }
func setup(c *caddy.Controller) error {
addr, lame, err := parse(c)
if err != nil {
return plugin.Error("health", err)
}
h := &health{Addr: addr, stop: make(chan bool), lameduck: lame}
c.OnStartup(h.OnStartup)
c.OnRestart(h.OnFinalShutdown)
c.OnFinalShutdown(h.OnFinalShutdown)
c.OnRestartFailed(h.OnStartup)
// Don't do AddPlugin, as health is not *really* a plugin just a separate webserver running.
return nil
}
func parse(c *caddy.Controller) (string, time.Duration, error) {
addr := ""
dur := time.Duration(0)
for c.Next() {
args := c.RemainingArgs()
switch len(args) {
case 0:
case 1:
addr = args[0]
if _, _, e := net.SplitHostPort(addr); e != nil {
return "", 0, e
}
default:
return "", 0, c.ArgErr()
}
for c.NextBlock() {
switch c.Val() {
case "lameduck":
args := c.RemainingArgs()
if len(args) != 1 {
return "", 0, c.ArgErr()
}
l, err := time.ParseDuration(args[0])
if err != nil {
return "", 0, fmt.Errorf("unable to parse lameduck duration value: '%v' : %v", args[0], err)
}
dur = l
default:
return "", 0, c.ArgErr()
}
}
}
return addr, dur, nil
}
|
