890cdb5cab
Small, trivial cleanup: got triggered because I saw a comment on how health plugins polls other plugins which isn't true. * Remove useless newHealth function * healthParse -> parse * Remove useless constants Net deletion of code. Signed-off-by: Miek Gieben <miek@miek.nl>
77 lines
1.5 KiB
Go
77 lines
1.5 KiB
Go
package health
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
"time"
|
|
|
|
"github.com/coredns/coredns/plugin"
|
|
"github.com/coredns/coredns/plugin/metrics"
|
|
|
|
"github.com/mholt/caddy"
|
|
)
|
|
|
|
func init() {
|
|
caddy.RegisterPlugin("health", caddy.Plugin{
|
|
ServerType: "dns",
|
|
Action: 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(func() error {
|
|
metrics.MustRegister(c, HealthDuration)
|
|
return nil
|
|
})
|
|
|
|
c.OnStartup(h.OnStartup)
|
|
c.OnRestart(h.OnRestart)
|
|
c.OnFinalShutdown(h.OnFinalShutdown)
|
|
|
|
// 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
|
|
}
|