Handle signals, code cleanup, easier labels

pkg/service/labels.go

@@ -0,0 +1,53 @@
+package service
+
+import (
+	"strconv"
+	"strings"
+	"time"
+	"traefik-lazyload/pkg/config"
+
+	"github.com/docker/docker/api/types"
+	"github.com/sirupsen/logrus"
+)
+
+func labelOrDefault(ct *types.Container, sublabel, dflt string) (string, bool) {
+	if val, ok := ct.Labels[config.SubLabel(sublabel)]; ok {
+		return val, true
+	}
+	return dflt, false
+}
+
+func labelOrDefaultArr(ct *types.Container, sublabel string) ([]string, bool) {
+	if val, ok := ct.Labels[config.SubLabel(sublabel)]; ok {
+		return strings.Split(val, ","), true
+	}
+	return []string{}, false
+}
+
+func labelOrDefaultInt(ct *types.Container, sublabel string, dflt int) (int, bool) {
+	s, ok := labelOrDefault(ct, sublabel, "")
+	if !ok {
+		return dflt, false
+	}
+
+	if val, err := strconv.Atoi(s); err != nil {
+		logrus.Warnf("Unable to parse %s on %s: %v. Using default of %d", sublabel, containerShort(ct), err, dflt)
+		return dflt, false
+	} else {
+		return val, true
+	}
+}
+
+func labelOrDefaultDuration(ct *types.Container, sublabel string, dflt time.Duration) (time.Duration, bool) {
+	s, ok := labelOrDefault(ct, sublabel, "")
+	if !ok {
+		return dflt, false
+	}
+
+	if val, err := time.ParseDuration(s); err != nil {
+		logrus.Warnf("Unable to parse %s on %s: %v. Using default of %s", sublabel, containerShort(ct), err, dflt.String())
+		return dflt, false
+	} else {
+		return val, true
+	}
+}