Move *proxy* to external (#2651)

* Move *proxy* to external

move the proxy plugin into coredns/proxy and remove it as a default
plugin. Link the proxy to deprecated in plugin.cfg

coredns/proxy doesn't compile because of the vendoring :(

Signed-off-by: Miek Gieben <miek@miek.nl>

* Add github.com/coredns/proxy

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

1 files changed, 0 insertions, 36 deletions

diff --git a/plugin/proxy/metrics.go b/plugin/proxy/metrics.go
deleted file mode 100644
index 0bea5ae4b..000000000
--- a/plugin/proxy/metrics.go
+++ /dev/null
@@ -1,36 +0,0 @@
-package proxy
-
-import (
-	"github.com/coredns/coredns/plugin"
-
-	"github.com/prometheus/client_golang/prometheus"
-)
-
-// Metrics the proxy plugin exports.
-var (
-	RequestCount = prometheus.NewCounterVec(prometheus.CounterOpts{
-		Namespace: plugin.Namespace,
-		Subsystem: "proxy",
-		Name:      "request_count_total",
-		Help:      "Counter of requests made per protocol, proxy protocol, family and upstream.",
-	}, []string{"server", "proto", "proxy_proto", "family", "to"})
-	RequestDuration = prometheus.NewHistogramVec(prometheus.HistogramOpts{
-		Namespace: plugin.Namespace,
-		Subsystem: "proxy",
-		Name:      "request_duration_seconds",
-		Buckets:   plugin.TimeBuckets,
-		Help:      "Histogram of the time (in seconds) each request took.",
-	}, []string{"server", "proto", "proxy_proto", "family", "to"})
-)
-
-// familyToString returns the string form of either 1, or 2. Returns
-// empty string is not a known family
-func familyToString(f int) string {
-	if f == 1 {
-		return "1"
-	}
-	if f == 2 {
-		return "2"
-	}
-	return ""
-}