d8714e64e4
* Rename middleware to plugin first pass; mostly used 'sed', few spots where I manually changed text. This still builds a coredns binary. * fmt error * Rename AddMiddleware to AddPlugin * Readd AddMiddleware to remain backwards compat
73 lines
1.2 KiB
Go
73 lines
1.2 KiB
Go
package health
|
|
|
|
import (
|
|
"net"
|
|
"time"
|
|
|
|
"github.com/coredns/coredns/core/dnsserver"
|
|
"github.com/coredns/coredns/plugin"
|
|
|
|
"github.com/mholt/caddy"
|
|
)
|
|
|
|
func init() {
|
|
caddy.RegisterPlugin("health", caddy.Plugin{
|
|
ServerType: "dns",
|
|
Action: setup,
|
|
})
|
|
}
|
|
|
|
func setup(c *caddy.Controller) error {
|
|
addr, err := healthParse(c)
|
|
if err != nil {
|
|
return plugin.Error("health", err)
|
|
}
|
|
|
|
h := &health{Addr: addr}
|
|
|
|
c.OnStartup(func() error {
|
|
for he := range healthers {
|
|
m := dnsserver.GetConfig(c).Handler(he)
|
|
if x, ok := m.(Healther); ok {
|
|
h.h = append(h.h, x)
|
|
}
|
|
}
|
|
return nil
|
|
})
|
|
|
|
c.OnStartup(func() error {
|
|
h.poll()
|
|
go func() {
|
|
for {
|
|
<-time.After(1 * time.Second)
|
|
h.poll()
|
|
}
|
|
}()
|
|
return nil
|
|
})
|
|
|
|
c.OnStartup(h.Startup)
|
|
c.OnFinalShutdown(h.Shutdown)
|
|
|
|
// Don't do AddMiddleware, as health is not *really* a plugin just a separate webserver running.
|
|
return nil
|
|
}
|
|
|
|
func healthParse(c *caddy.Controller) (string, error) {
|
|
addr := ""
|
|
for c.Next() {
|
|
args := c.RemainingArgs()
|
|
|
|
switch len(args) {
|
|
case 0:
|
|
case 1:
|
|
addr = args[0]
|
|
if _, _, e := net.SplitHostPort(addr); e != nil {
|
|
return "", e
|
|
}
|
|
default:
|
|
return "", c.ArgErr()
|
|
}
|
|
}
|
|
return addr, nil
|
|
}
|