minio/cmd/retry-storage_test.go

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/*
* Minio Cloud Storage, (C) 2016, 2017 Minio, Inc.
*
* 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 cmd
import (
"bytes"
"crypto/sha256"
"errors"
"os"
"reflect"
"testing"
"time"
)
// Tests retry storage.
func TestRetryStorage(t *testing.T) {
root, err := newTestConfig(globalMinioDefaultRegion)
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(root)
originalStorageDisks, disks := prepareXLStorageDisks(t)
defer removeRoots(disks)
var storageDisks = make([]StorageAPI, len(originalStorageDisks))
for i := range originalStorageDisks {
retryDisk, ok := originalStorageDisks[i].(*retryStorage)
if !ok {
t.Fatal("storage disk is not *retryStorage type")
}
storageDisks[i] = &retryStorage{
remoteStorage: newNaughtyDisk(retryDisk, map[int]error{
1: errDiskNotFound,
}, nil),
maxRetryAttempts: 1,
retryUnit: time.Millisecond,
retryCap: time.Millisecond * 10,
}
}
// Validate all the conditions for retrying calls.
storageDisks = make([]StorageAPI, len(originalStorageDisks))
for i := range originalStorageDisks {
retryDisk, ok := originalStorageDisks[i].(*retryStorage)
if !ok {
t.Fatal("storage disk is not *retryStorage type")
}
storageDisks[i] = &retryStorage{
remoteStorage: newNaughtyDisk(retryDisk, map[int]error{
1: errDiskNotFound,
}, nil),
maxRetryAttempts: 1,
retryUnit: time.Millisecond,
retryCap: time.Millisecond * 10,
}
}
for _, disk := range storageDisks {
err = disk.Init()
if err != errDiskNotFound {
t.Fatal("Expected errDiskNotFound, got", err)
}
}
for _, disk := range storageDisks {
_, err = disk.DiskInfo()
if err != nil {
t.Fatal(err)
}
}
storageDisks = make([]StorageAPI, len(originalStorageDisks))
for i := range originalStorageDisks {
retryDisk, ok := originalStorageDisks[i].(*retryStorage)
if !ok {
t.Fatal("storage disk is not *retryStorage type")
}
storageDisks[i] = &retryStorage{
remoteStorage: newNaughtyDisk(retryDisk, map[int]error{
1: errDiskNotFound,
}, nil),
maxRetryAttempts: 1,
retryUnit: time.Millisecond,
retryCap: time.Millisecond * 10,
}
}
for _, disk := range storageDisks {
if err = disk.MakeVol("existent"); err != nil {
t.Fatal(err)
}
if _, err = disk.StatVol("existent"); err == errVolumeNotFound {
t.Fatal(err)
}
}
storageDisks = make([]StorageAPI, len(originalStorageDisks))
for i := range originalStorageDisks {
retryDisk, ok := originalStorageDisks[i].(*retryStorage)
if !ok {
t.Fatal("storage disk is not *retryStorage type")
}
storageDisks[i] = &retryStorage{
remoteStorage: newNaughtyDisk(retryDisk, map[int]error{
1: errDiskNotFound,
}, nil),
maxRetryAttempts: 1,
retryUnit: time.Millisecond,
retryCap: time.Millisecond * 10,
}
}
for _, disk := range storageDisks {
if _, err = disk.StatVol("existent"); err == errVolumeNotFound {
t.Fatal(err)
}
}
storageDisks = make([]StorageAPI, len(originalStorageDisks))
for i := range originalStorageDisks {
retryDisk, ok := originalStorageDisks[i].(*retryStorage)
if !ok {
t.Fatal("storage disk is not *retryStorage type")
}
storageDisks[i] = &retryStorage{
remoteStorage: newNaughtyDisk(retryDisk, map[int]error{
1: errDiskNotFound,
}, nil),
maxRetryAttempts: 1,
retryUnit: time.Millisecond,
retryCap: time.Millisecond * 10,
}
}
for _, disk := range storageDisks {
if _, err = disk.ListVols(); err != nil {
t.Fatal(err)
}
}
storageDisks = make([]StorageAPI, len(originalStorageDisks))
for i := range originalStorageDisks {
retryDisk, ok := originalStorageDisks[i].(*retryStorage)
if !ok {
t.Fatal("storage disk is not *retryStorage type")
}
storageDisks[i] = &retryStorage{
remoteStorage: newNaughtyDisk(retryDisk, map[int]error{
1: errDiskNotFound,
}, nil),
maxRetryAttempts: 1,
retryUnit: time.Millisecond,
retryCap: time.Millisecond * 10,
}
}
for _, disk := range storageDisks {
if err = disk.DeleteVol("existent"); err != nil {
t.Fatal(err)
}
if str := disk.String(); str == "" {
t.Fatal("String method for disk cannot be empty.")
}
}
storageDisks = make([]StorageAPI, len(originalStorageDisks))
for i := range originalStorageDisks {
retryDisk, ok := originalStorageDisks[i].(*retryStorage)
if !ok {
t.Fatal("storage disk is not *retryStorage type")
}
storageDisks[i] = &retryStorage{
remoteStorage: newNaughtyDisk(retryDisk, map[int]error{
1: errDiskNotFound,
}, nil),
maxRetryAttempts: 1,
retryUnit: time.Millisecond,
retryCap: time.Millisecond * 10,
}
}
for _, disk := range storageDisks {
if err = disk.MakeVol("existent"); err != nil {
t.Fatal(err)
}
}
storageDisks = make([]StorageAPI, len(originalStorageDisks))
for i := range originalStorageDisks {
retryDisk, ok := originalStorageDisks[i].(*retryStorage)
if !ok {
t.Fatal("storage disk is not *retryStorage type")
}
storageDisks[i] = &retryStorage{
remoteStorage: newNaughtyDisk(retryDisk, map[int]error{
1: errDiskNotFound,
}, nil),
maxRetryAttempts: 1,
retryUnit: time.Millisecond,
retryCap: time.Millisecond * 10,
}
}
for _, disk := range storageDisks {
if err = disk.PrepareFile("existent", "path", 10); err != nil {
t.Fatal(err)
}
}
storageDisks = make([]StorageAPI, len(originalStorageDisks))
for i := range originalStorageDisks {
retryDisk, ok := originalStorageDisks[i].(*retryStorage)
if !ok {
t.Fatal("storage disk is not *retryStorage type")
}
storageDisks[i] = &retryStorage{
remoteStorage: newNaughtyDisk(retryDisk, map[int]error{
1: errDiskNotFound,
}, nil),
maxRetryAttempts: 1,
retryUnit: time.Millisecond,
retryCap: time.Millisecond * 10,
}
}
for _, disk := range storageDisks {
if err = disk.AppendFile("existent", "path", []byte("Hello, World")); err != nil {
t.Fatal(err)
}
}
storageDisks = make([]StorageAPI, len(originalStorageDisks))
for i := range originalStorageDisks {
retryDisk, ok := originalStorageDisks[i].(*retryStorage)
if !ok {
t.Fatal("storage disk is not *retryStorage type")
}
storageDisks[i] = &retryStorage{
remoteStorage: newNaughtyDisk(retryDisk, map[int]error{
1: errDiskNotFound,
}, nil),
maxRetryAttempts: 1,
retryUnit: time.Millisecond,
retryCap: time.Millisecond * 10,
}
}
for _, disk := range storageDisks {
var buf1 []byte
if buf1, err = disk.ReadAll("existent", "path"); err != nil {
t.Fatal(err)
}
if !bytes.Equal(buf1, []byte("Hello, World")) {
t.Fatalf("Expected `Hello, World`, got %s", string(buf1))
}
}
storageDisks = make([]StorageAPI, len(originalStorageDisks))
for i := range originalStorageDisks {
retryDisk, ok := originalStorageDisks[i].(*retryStorage)
if !ok {
t.Fatal("storage disk is not *retryStorage type")
}
storageDisks[i] = &retryStorage{
remoteStorage: newNaughtyDisk(retryDisk, map[int]error{
1: errDiskNotFound,
}, nil),
maxRetryAttempts: 1,
retryUnit: time.Millisecond,
retryCap: time.Millisecond * 10,
}
}
for _, disk := range storageDisks {
var buf2 = make([]byte, 5)
var n int64
if n, err = disk.ReadFile("existent", "path", 7, buf2, nil); err != nil {
t.Fatal(err)
}
if err != nil {
t.Error("Error in ReadFile", err)
}
if n != 5 {
t.Fatalf("Expected 5, got %d", n)
}
if !bytes.Equal(buf2, []byte("World")) {
t.Fatalf("Expected `World`, got %s", string(buf2))
}
}
sha256Hash := func(b []byte) []byte {
k := sha256.Sum256(b)
return k[:]
}
for _, disk := range storageDisks {
var buf2 = make([]byte, 5)
verifier := NewBitrotVerifier(SHA256, sha256Hash([]byte("Hello, World")))
var n int64
if n, err = disk.ReadFile("existent", "path", 7, buf2, verifier); err != nil {
t.Fatal(err)
}
if err != nil {
t.Error("Error in ReadFile with bitrot verification", err)
}
if n != 5 {
t.Fatalf("Expected 5, got %d", n)
}
if !bytes.Equal(buf2, []byte("World")) {
t.Fatalf("Expected `World`, got %s", string(buf2))
}
}
storageDisks = make([]StorageAPI, len(originalStorageDisks))
for i := range originalStorageDisks {
retryDisk, ok := originalStorageDisks[i].(*retryStorage)
if !ok {
t.Fatal("storage disk is not *retryStorage type")
}
storageDisks[i] = &retryStorage{
remoteStorage: newNaughtyDisk(retryDisk, map[int]error{
1: errDiskNotFound,
}, nil),
maxRetryAttempts: 1,
retryUnit: time.Millisecond,
retryCap: time.Millisecond * 10,
}
}
for _, disk := range storageDisks {
if err = disk.RenameFile("existent", "path", "existent", "new-path"); err != nil {
t.Fatal(err)
}
if _, err = disk.StatFile("existent", "new-path"); err != nil {
t.Fatal(err)
}
}
storageDisks = make([]StorageAPI, len(originalStorageDisks))
for i := range originalStorageDisks {
retryDisk, ok := originalStorageDisks[i].(*retryStorage)
if !ok {
t.Fatal("storage disk is not *retryStorage type")
}
storageDisks[i] = &retryStorage{
remoteStorage: newNaughtyDisk(retryDisk, map[int]error{
1: errDiskNotFound,
}, nil),
maxRetryAttempts: 1,
retryUnit: time.Millisecond,
retryCap: time.Millisecond * 10,
}
}
for _, disk := range storageDisks {
if _, err = disk.StatFile("existent", "new-path"); err != nil {
t.Fatal(err)
}
}
storageDisks = make([]StorageAPI, len(originalStorageDisks))
for i := range originalStorageDisks {
retryDisk, ok := originalStorageDisks[i].(*retryStorage)
if !ok {
t.Fatal("storage disk is not *retryStorage type")
}
storageDisks[i] = &retryStorage{
remoteStorage: newNaughtyDisk(retryDisk, map[int]error{
1: errDiskNotFound,
}, nil),
maxRetryAttempts: 1,
retryUnit: time.Millisecond,
retryCap: time.Millisecond * 10,
}
}
for _, disk := range storageDisks {
var entries []string
if entries, err = disk.ListDir("existent", ""); err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(entries, []string{"new-path"}) {
t.Fatalf("Expected []string{\"new-path\"}, got %s", entries)
}
}
storageDisks = make([]StorageAPI, len(originalStorageDisks))
for i := range originalStorageDisks {
retryDisk, ok := originalStorageDisks[i].(*retryStorage)
if !ok {
t.Fatal("storage disk is not *retryStorage type")
}
storageDisks[i] = &retryStorage{
remoteStorage: newNaughtyDisk(retryDisk, map[int]error{
1: errDiskNotFound,
}, nil),
maxRetryAttempts: 1,
retryUnit: time.Millisecond,
retryCap: time.Millisecond * 10,
}
}
for _, disk := range storageDisks {
if err = disk.DeleteFile("existent", "new-path"); err != nil {
t.Fatal(err)
}
if err = disk.DeleteVol("existent"); err != nil {
t.Fatal(err)
}
}
}
// Tests reply storage error transformation.
func TestReplyStorageErr(t *testing.T) {
unknownErr := errors.New("Unknown error")
testCases := []struct {
expectedErr error
err error
}{
{
expectedErr: errDiskNotFound,
err: errDiskNotFoundFromNetError,
},
{
expectedErr: errDiskNotFound,
err: errDiskNotFoundFromRPCShutdown,
},
{
expectedErr: unknownErr,
err: unknownErr,
},
}
for i, testCase := range testCases {
resultErr := retryToStorageErr(testCase.err)
if testCase.expectedErr != resultErr {
t.Errorf("Test %d: Expected %s, got %s", i+1, testCase.expectedErr, resultErr)
}
}
}