plugin/kubernetes: make glog log to standard output
Jump through all the hoops to make this work.
@@ -2,7 +2,9 @@ package kubernetes
import (
"errors"
+ "flag"
"fmt"
+ "os"
"strconv"
"strings"
"time"
@@ -19,6 +21,13 @@ import (
)
func init() {
+ // Kubernetes plugin uses the kubernetes library, which uses glog (ugh), we must set this *flag*,
+ // so we don't log to the filesystem, which can fill up and crash CoreDNS indirectly by calling os.Exit().
+ // We also set: os.Stderr = os.Stdout in the setup function below so we output to standard out; as we do for
+ // all CoreDNS logging. We can't do *that* in the init function, because we, when starting, also barf some
+ // things to stderr.
+ flag.Set("logtostderr", "true")
+
caddy.RegisterPlugin("kubernetes", caddy.Plugin{
ServerType: "dns",
Action: setup,
@@ -26,6 +35,9 @@ func init() {
}
func setup(c *caddy.Controller) error {
+ // See comment in the init function.
+ os.Stderr = os.Stdout
+
k, err := kubernetesParse(c)
if err != nil {
return plugin.Error("kubernetes", err)
