metrics: Total amount of connections to the service

The existing metric 'gitaly_connections_total' exists
on a package level (the global metric) and used for
both praefect and gitaly services. With this change
we address both those problems: the metric now are
local to the service and a new metric introduced
specially for praefect following the same naming
pattern as all other praefect-related metrics.

The content of the connectioncounter package moved
into a starter package as it makes no sense to have
it separately.

Change: added

1 files changed, 0 insertions, 37 deletions

diff --git a/internal/connectioncounter/connectioncounter.go b/internal/connectioncounter/connectioncounter.go
deleted file mode 100644
index 4c58fceff..000000000
--- a/internal/connectioncounter/connectioncounter.go
+++ /dev/null
@@ -1,37 +0,0 @@
-package connectioncounter
-
-import (
-	"net"
-
-	"github.com/prometheus/client_golang/prometheus"
-	"github.com/prometheus/client_golang/prometheus/promauto"
-)
-
-var connTotal = promauto.NewCounterVec(
-	prometheus.CounterOpts{
-		Name: "gitaly_connections_total",
-		Help: "Total number of connections accepted by this Gitaly process",
-	},
-	[]string{"type"},
-)
-
-// New returns a listener which increments a prometheus counter on each
-// accepted connection. Use cType to specify the connection type, this is
-// a prometheus label.
-func New(cType string, l net.Listener) net.Listener {
-	return &countingListener{
-		cType:    cType,
-		Listener: l,
-	}
-}
-
-type countingListener struct {
-	net.Listener
-	cType string
-}
-
-func (cl *countingListener) Accept() (net.Conn, error) {
-	conn, err := cl.Listener.Accept()
-	connTotal.WithLabelValues(cl.cType).Inc()
-	return conn, err
-}