use xid to generate nydusd's internal ID

The original ID generation method spawns a string with
lower case, upper case and undersocre, which is too complicated.

Signed-off-by: Changwei Ge <gechangwei@bytedance.com>

go.mod

@@ -12,14 +12,14 @@ require (
 	github.com/docker/cli v20.10.0-beta1.0.20201029214301-1d20b15adc38+incompatible
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da
 	github.com/google/go-containerregistry v0.5.1
-	github.com/google/uuid v1.2.0
 	github.com/hashicorp/go-retryablehttp v0.7.1
 	github.com/opencontainers/go-digest v1.0.0
 	github.com/opencontainers/image-spec v1.0.3-0.20211202183452-c5a74bcca799
 	github.com/pkg/errors v0.9.1
 	github.com/prometheus/client_golang v1.11.1
 	github.com/prometheus/client_model v0.2.0
 	github.com/prometheus/common v0.30.0
+	github.com/rs/xid v1.4.0
 	github.com/sirupsen/logrus v1.8.1
 	github.com/stretchr/testify v1.7.0
 	github.com/urfave/cli/v2 v2.3.0

go.sum

@@ -614,6 +614,8 @@ github.com/prometheus/tsdb v0.7.1/go.mod h1:qhTCs0VvXwvX/y3TZrWD7rabWM+ijKTux40T
 github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6SoW27p1b0cqNHllgS5HIMJraePCO15w5zCzIWYg=
 github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
+github.com/rs/xid v1.4.0 h1:qd7wPTDkN6KQx2VmMBLrpHkiyQwgFXRnkOLacUiaSNY=
+github.com/rs/xid v1.4.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
 github.com/russross/blackfriday/v2 v2.0.1 h1:lPqVAte+HuHNfhJ/0LC98ESWRz8afy9tM/0RK8m9o+Q=
 github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/safchain/ethtool v0.0.0-20190326074333-42ed695e3de8/go.mod h1:Z0q5wiBQGYcxhMZ6gUqHn6pYNLypFAvaL3UvgZLR0U4=

pkg/daemon/idgen.go

@@ -7,13 +7,9 @@
 package daemon
 
 import (
-	"encoding/base64"
-
-	"github.com/google/uuid"
+	"github.com/rs/xid"
 )
 
 func newID() string {
-	id := uuid.New()
-	b := [16]byte(id)
-	return base64.RawURLEncoding.EncodeToString(b[:])
+	return xid.New().String()
 }