Code refactor, separate discovery from manager

pkg/service/util.go

@@ -1,9 +1,6 @@
 package service
 
 import (
-	"fmt"
-	"strings"
-
 	"github.com/docker/docker/api/types"
 )
 
@@ -14,38 +11,3 @@ func sumNetworkBytes(networks map[string]types.NetworkStats) (recv int64, send i
 	}
 	return
 }
-
-func shortId(id string) string {
-	const SLEN = 8
-	if len(id) <= SLEN {
-		return id
-	}
-	return id[:SLEN]
-}
-
-func containerShort(c *types.Container) string {
-	var name string
-	if len(c.Names) > 0 {
-		name = trimRootPath(c.Names[0])
-	} else {
-		name = c.Image
-	}
-	return fmt.Sprintf("%s(%s)", name, shortId(c.ID))
-}
-
-func trimRootPath(s string) string {
-	return strings.TrimPrefix(s, "/")
-}
-
-func isRunning(c *types.Container) bool {
-	return c.State == "running"
-}
-
-func strSliceContains(slice []string, s string) bool {
-	for _, item := range slice {
-		if item == s {
-			return true
-		}
-	}
-	return false
-}