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Support utilities

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This commit is contained in:
Bowei Du 2018-01-04 23:21:53 -08:00
parent 78c8249cb3
commit 6894e3d32b
2 changed files with 364 additions and 0 deletions
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167
pkg/cloudprovider/providers/gce/cloud/utils.go Normal file
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/*
Copyright 2017 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package cloud
import (
"encoding/json"
"fmt"
"strings"
"k8s.io/kubernetes/pkg/cloudprovider/providers/gce/cloud/meta"
)
const (
gaPrefix = "https://www.googleapis.com/compute/v1/"
alphaPrefix = "https://www.googleapis.com/compute/alpha/"
betaPrefix = "https://www.googleapis.com/compute/beta/"
)
var (
allPrefixes = []string{gaPrefix, alphaPrefix, betaPrefix}
)
// ResourceID identifies a GCE resource as parsed from compute resource URL.
type ResourceID struct {
ProjectID string
Resource string
Key *meta.Key
}
// Equal returns true if two resource IDs are equal.
func (r *ResourceID) Equal(other *ResourceID) bool {
if r.ProjectID != other.ProjectID || r.Resource != other.Resource {
return false
}
if r.Key != nil && other.Key != nil {
return *r.Key == *other.Key
}
if r.Key == nil && other.Key == nil {
return true
}
return false
}
// ParseResourceURL parses resource URLs of the following formats:
//
// projects/<proj>/global/<res>/<name>
// projects/<proj>/regions/<region>/<res>/<name>
// projects/<proj>/zones/<zone>/<res>/<name>
// [https://www.googleapis.com/compute/<ver>]/projects/<proj>/global/<res>/<name>
// [https://www.googleapis.com/compute/<ver>]/projects/<proj>/regions/<region>/<res>/<name>
// [https://www.googleapis.com/compute/<ver>]/projects/<proj>/zones/<zone>/<res>/<name>
func ParseResourceURL(url string) (*ResourceID, error) {
errNotValid := fmt.Errorf("%q is not a valid resource URL", url)
// Remove the "https://..." prefix if present
for _, prefix := range allPrefixes {
if strings.HasPrefix(url, prefix) {
if len(url) < len(prefix) {
return nil, errNotValid
}
url = url[len(prefix):]
break
}
}
parts := strings.Split(url, "/")
if len(parts) < 2 || parts[0] != "projects" {
return nil, errNotValid
}
ret := &ResourceID{ProjectID: parts[1]}
if len(parts) == 2 {
ret.Resource = "projects"
return ret, nil
}
if len(parts) < 4 {
return nil, errNotValid
}
if len(parts) == 4 {
switch parts[2] {
case "regions":
ret.Resource = "regions"
ret.Key = meta.GlobalKey(parts[3])
return ret, nil
case "zones":
ret.Resource = "zones"
ret.Key = meta.GlobalKey(parts[3])
return ret, nil
default:
return nil, errNotValid
}
}
switch parts[2] {
case "global":
if len(parts) != 5 {
return nil, errNotValid
}
ret.Resource = parts[3]
ret.Key = meta.GlobalKey(parts[4])
return ret, nil
case "regions":
if len(parts) != 6 {
return nil, errNotValid
}
ret.Resource = parts[4]
ret.Key = meta.RegionalKey(parts[5], parts[3])
return ret, nil
case "zones":
if len(parts) != 6 {
return nil, errNotValid
}
ret.Resource = parts[4]
ret.Key = meta.ZonalKey(parts[5], parts[3])
return ret, nil
}
return nil, errNotValid
}
func copyViaJSON(dest, src interface{}) error {
bytes, err := json.Marshal(src)
if err != nil {
return err
}
return json.Unmarshal(bytes, dest)
}
// SelfLink returns the self link URL for the given object.
func SelfLink(ver meta.Version, project, resource string, key meta.Key) string {
var prefix string
switch ver {
case meta.VersionAlpha:
prefix = alphaPrefix
case meta.VersionBeta:
prefix = betaPrefix
case meta.VersionGA:
prefix = gaPrefix
default:
prefix = "invalid-prefix"
}
switch key.Type() {
case meta.Zonal:
return fmt.Sprintf("%sprojects/%s/zones/%s/%s/%s", prefix, project, key.Zone, resource, key.Name)
case meta.Regional:
return fmt.Sprintf("%sprojects/%s/regions/%s/%s/%s", prefix, project, key.Region, resource, key.Name)
case meta.Global:
return fmt.Sprintf("%sprojects/%s/%s/%s", prefix, project, resource, key.Name)
}
return "invalid-self-link"
}

197
pkg/cloudprovider/providers/gce/cloud/utils_test.go Normal file
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/*
Copyright 2017 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package cloud
import (
"errors"
"testing"
"k8s.io/kubernetes/pkg/cloudprovider/providers/gce/cloud/meta"
)
func TestParseResourceURL(t *testing.T) {
t.Parallel()
for _, tc := range []struct {
in string
r *ResourceID
}{
{
"https://www.googleapis.com/compute/v1/projects/some-gce-project",
&ResourceID{"some-gce-project", "projects", nil},
},
{
"https://www.googleapis.com/compute/v1/projects/some-gce-project/regions/us-central1",
&ResourceID{"some-gce-project", "regions", meta.GlobalKey("us-central1")},
},
{
"https://www.googleapis.com/compute/v1/projects/some-gce-project/zones/us-central1-b",
&ResourceID{"some-gce-project", "zones", meta.GlobalKey("us-central1-b")},
},
{
"https://www.googleapis.com/compute/v1/projects/some-gce-project/global/operations/operation-1513289952196-56054460af5a0-b1dae0c3-9bbf9dbf",
&ResourceID{"some-gce-project", "operations", meta.GlobalKey("operation-1513289952196-56054460af5a0-b1dae0c3-9bbf9dbf")},
},
{
"https://www.googleapis.com/compute/alpha/projects/some-gce-project/regions/us-central1/addresses/my-address",
&ResourceID{"some-gce-project", "addresses", meta.RegionalKey("my-address", "us-central1")},
},
{
"https://www.googleapis.com/compute/v1/projects/some-gce-project/zones/us-central1-c/instances/instance-1",
&ResourceID{"some-gce-project", "instances", meta.ZonalKey("instance-1", "us-central1-c")},
},
{
"projects/some-gce-project",
&ResourceID{"some-gce-project", "projects", nil},
},
{
"projects/some-gce-project/regions/us-central1",
&ResourceID{"some-gce-project", "regions", meta.GlobalKey("us-central1")},
},
{
"projects/some-gce-project/zones/us-central1-b",
&ResourceID{"some-gce-project", "zones", meta.GlobalKey("us-central1-b")},
},
{
"projects/some-gce-project/global/operations/operation-1513289952196-56054460af5a0-b1dae0c3-9bbf9dbf",
&ResourceID{"some-gce-project", "operations", meta.GlobalKey("operation-1513289952196-56054460af5a0-b1dae0c3-9bbf9dbf")},
},
{
"projects/some-gce-project/regions/us-central1/addresses/my-address",
&ResourceID{"some-gce-project", "addresses", meta.RegionalKey("my-address", "us-central1")},
},
{
"projects/some-gce-project/zones/us-central1-c/instances/instance-1",
&ResourceID{"some-gce-project", "instances", meta.ZonalKey("instance-1", "us-central1-c")},
},
} {
r, err := ParseResourceURL(tc.in)
if err != nil {
t.Errorf("ParseResourceURL(%q) = %+v, %v; want _, nil", tc.in, r, err)
continue
}
if !r.Equal(tc.r) {
t.Errorf("ParseResourceURL(%q) = %+v, nil; want %+v, nil", tc.in, r, tc.r)
}
}
// Malformed URLs.
for _, tc := range []string{
"",
"/",
"/a",
"/a/b",
"/a/b/c",
"/a/b/c/d",
"/a/b/c/d/e",
"/a/b/c/d/e/f",
"https://www.googleapis.com/compute/v1/projects/some-gce-project/global",
"projects/some-gce-project/global",
"projects/some-gce-project/global/foo/bar/baz",
"projects/some-gce-project/zones/us-central1-c/res",
"projects/some-gce-project/zones/us-central1-c/res/name/extra",
"https://www.googleapis.com/compute/gamma/projects/some-gce-project/global/addresses/name",
} {
r, err := ParseResourceURL(tc)
if err == nil {
t.Errorf("ParseResourceURL(%q) = %+v, %v, want _, error", tc, r, err)
}
}
}
type A struct {
A, B, C string
}
type B struct {
A, B, D string
}
type E struct{}
func (*E) MarshalJSON() ([]byte, error) {
return nil, errors.New("injected error")
}
func TestCopyVisJSON(t *testing.T) {
t.Parallel()
var b B
srcA := &A{"aa", "bb", "cc"}
err := copyViaJSON(&b, srcA)
if err != nil {
t.Errorf(`copyViaJSON(&b, %+v) = %v, want nil`, srcA, err)
} else {
expectedB := B{"aa", "bb", ""}
if b != expectedB {
t.Errorf("b == %+v, want %+v", b, expectedB)
}
}
var a A
srcB := &B{"aaa", "bbb", "ccc"}
err = copyViaJSON(&a, srcB)
if err != nil {
t.Errorf(`copyViaJSON(&a, %+v) = %v, want nil`, srcB, err)
} else {
expectedA := A{"aaa", "bbb", ""}
if a != expectedA {
t.Errorf("a == %+v, want %+v", a, expectedA)
}
}
if err := copyViaJSON(&a, &E{}); err == nil {
t.Errorf("copyViaJSON(&a, &E{}) = nil, want error")
}
}
func TestSelfLink(t *testing.T) {
t.Parallel()
for _, tc := range []struct{
ver meta.Version
project string
resource string
key meta.Key
want string
}{
{
meta.VersionAlpha,
"proj1",
"addresses",
*meta.RegionalKey("key1", "us-central1"),
"https://www.googleapis.com/compute/alpha/projects/proj1/regions/us-central1/addresses/key1",
},
{
meta.VersionBeta,
"proj3",
"disks",
*meta.ZonalKey("key2", "us-central1-b"),
"https://www.googleapis.com/compute/beta/projects/proj3/zones/us-central1-b/disks/key2",
},
{
meta.VersionGA,
"proj4",
"urlMaps",
*meta.GlobalKey("key3"),
"https://www.googleapis.com/compute/v1/projects/proj4/urlMaps/key3",
},
}{
if link := SelfLink(tc.ver, tc.project, tc.resource, tc.key); link != tc.want {
t.Errorf("SelfLink(%v, %q, %q, %v) = %v, want %q", tc.ver, tc.project, tc.resource, tc.key, link, tc.want)
}
}
}