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raft_log_test.go
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raft_log_test.go
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// Copyright 2018-2020 The NATS 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 server
import (
"bytes"
"fmt"
"os"
"path/filepath"
"reflect"
"strings"
"sync"
"testing"
"github.com/hashicorp/raft"
"github.com/nats-io/nats-streaming-server/stores"
)
func createTestRaftLog(t tLogger, sync bool, trailingLogs int) *raftLog {
if err := os.MkdirAll(defaultRaftLog, os.ModeDir+os.ModePerm); err != nil {
stackFatalf(t, "Unable to create raft log directory: %v", err)
}
fileName := filepath.Join(defaultRaftLog, raftLogFile)
store, err := newRaftLog(testLogger, fileName, sync, trailingLogs, false, stores.CryptoCipherAutoSelect, nil)
if err != nil {
stackFatalf(t, "Error creating store: %v", err)
}
return store
}
func TestRaftLogDeleteRange(t *testing.T) {
cleanupRaftLog(t)
defer cleanupRaftLog(t)
// No sync (will check that conn's NoSync value is correct after a recreating the file)
store := createTestRaftLog(t, false, 0)
defer store.Close()
// Store in dbConf bucket
k1 := []byte("1")
if err := store.SetUint64(k1, 1); err != nil {
t.Fatalf("Error on set: %v", err)
}
k2 := []byte("2")
if err := store.SetUint64(k2, 2); err != nil {
t.Fatalf("Error on set: %v", err)
}
// Store in dbLogs bucket
var logs []*raft.Log
for i := 0; i < 10; i++ {
log := &raft.Log{
Index: uint64(i + 1),
Term: 1,
Data: []byte(fmt.Sprintf("log%d", (i + 1))),
}
logs = append(logs, log)
if err := store.StoreLog(log); err != nil {
t.Fatalf("Error on store log: %v", err)
}
}
// Call DeleteRange 1..5 and make sure we have all the conf entries
// and the 5 last logs
if err := store.DeleteRange(1, 5); err != nil {
t.Fatalf("Error on delete range: %v", err)
}
if v, err := store.GetUint64(k1); v != 1 || err != nil {
t.Fatalf("Error on get of key k1: %v - %v", v, err)
}
if v, err := store.GetUint64(k2); v != 2 || err != nil {
t.Fatalf("Error on get of key k2: %v - %v", v, err)
}
// Logs 1 to 5 should not exist
for i := 1; i <= 5; i++ {
var log *raft.Log
if err := store.GetLog(uint64(i), log); err == nil {
t.Fatalf("Expected log %v to not exist", (i + 1))
}
}
// Logs 6 to 10 should exist
if first, err := store.FirstIndex(); first != 6 || err != nil {
t.Fatalf("Unexpected first index: %v - %v", first, err)
}
if last, err := store.LastIndex(); last != 10 || err != nil {
t.Fatalf("Unexpected last index: %v - %v", last, err)
}
for i := 6; i <= 10; i++ {
log := &raft.Log{}
if err := store.GetLog(uint64(i), log); err != nil {
t.Fatalf("Error on GetLog for index %v: %v", i, err)
}
if !reflect.DeepEqual(log, logs[i-1]) {
t.Fatalf("Unexpected log at index %v: %v", i, log)
}
}
// Delete just one element
if err := store.DeleteRange(6, 6); err != nil {
t.Fatalf("Error on delete: %v", err)
}
// Keys should still be present
if v, err := store.GetUint64(k1); v != 1 || err != nil {
t.Fatalf("Error on get of key k1: %v - %v", v, err)
}
if v, err := store.GetUint64(k2); v != 2 || err != nil {
t.Fatalf("Error on get of key k2: %v - %v", v, err)
}
// Logs 7 to 10 should exist
if first, err := store.FirstIndex(); first != 7 || err != nil {
t.Fatalf("Unexpected first index: %v - %v", first, err)
}
if last, err := store.LastIndex(); last != 10 || err != nil {
t.Fatalf("Unexpected last index: %v - %v", last, err)
}
for i := 7; i <= 10; i++ {
log := &raft.Log{}
if err := store.GetLog(uint64(i), log); err != nil {
t.Fatalf("Error on GetLog: %v", err)
}
if !reflect.DeepEqual(log, logs[i-1]) {
t.Fatalf("Unexpected log at index %v: %v", i, log)
}
}
// Check close:
if err := store.Close(); err != nil {
t.Fatalf("Error on close: %v", err)
}
}
func TestRaftLogEncodeDecodeLogs(t *testing.T) {
cleanupRaftLog(t)
defer cleanupRaftLog(t)
store := createTestRaftLog(t, false, 0)
defer store.Close()
total := 50000
logs := make([]*raft.Log, 0, total)
for i := 0; i < total; i++ {
log := &raft.Log{
Index: uint64(i + 1),
Term: 1,
Data: []byte(fmt.Sprintf("%d", (i + 1))),
}
logs = append(logs, log)
}
encoded := make([][]byte, 0, total)
for _, l := range logs {
b, err := store.encodeRaftLog(l)
if err != nil {
t.Fatalf("Error encoding: %v", err)
}
encoded = append(encoded, b)
}
decoded := make([]*raft.Log, 0, total)
for _, e := range encoded {
var l raft.Log
if err := store.decodeRaftLog(e, &l); err != nil {
t.Fatalf("Error decoding: %v", err)
}
decoded = append(decoded, &l)
}
for i, d := range decoded {
if !reflect.DeepEqual(d, logs[i]) {
t.Fatalf("Wrong decoding at index %v. Expected %v, got %v", i+1, logs[i], d)
}
}
errCh := make(chan error, 1)
// Perform concurrent encoding...
wg := sync.WaitGroup{}
encode := func(wg *sync.WaitGroup, min, max int) {
defer wg.Done()
for i := min; i < max; i++ {
l := logs[i]
if _, err := store.encodeRaftLog(l); err != nil {
select {
case errCh <- fmt.Errorf("Error during encoding: %v", err):
return
default:
}
}
}
}
wg.Add(4)
go encode(&wg, 0, total/4)
go encode(&wg, total/4, 2*(total/4))
go encode(&wg, 2*(total/4), 3*(total/4))
go encode(&wg, 3*(total/4), total)
wg.Wait()
// Concurrent decoding...
decode := func(wg *sync.WaitGroup, min, max int) {
defer wg.Done()
for i := min; i < max; i++ {
e := encoded[i]
var l raft.Log
if err := store.decodeRaftLog(e, &l); err != nil {
select {
case errCh <- fmt.Errorf("Error during decoding: %v", err):
return
default:
}
}
}
}
wg.Add(4)
go decode(&wg, 0, total/4)
go decode(&wg, total/4, 2*(total/4))
go decode(&wg, 2*(total/4), 3*(total/4))
go decode(&wg, 3*(total/4), total)
wg.Wait()
select {
case e := <-errCh:
t.Fatal(e.Error())
default:
}
}
func TestRaftLogWithEncryption(t *testing.T) {
cleanupRaftLog(t)
defer cleanupRaftLog(t)
store := createTestRaftLog(t, false, 0)
defer store.Close()
// Plain text log
store.StoreLog(&raft.Log{Index: 1, Term: 1, Type: raft.LogCommand, Data: []byte("abcd")})
// Log with marker that says AES but content is not encrypted
store.StoreLog(&raft.Log{Index: 2, Term: 1, Type: raft.LogCommand, Data: []byte{stores.CryptoCodeAES, 'a', 'b', 'c', 'd'}})
store.RLock()
fileName := store.fileName
store.RUnlock()
store.Close()
// Re-open as encrypted store
store, err := newRaftLog(testLogger, fileName, false, 0, true, stores.CryptoCipherAES, []byte("testkey"))
if err != nil {
t.Fatalf("Error opening store: %v", err)
}
defer store.Close()
// Attempt to get the log, it should be ok
rl := &raft.Log{}
if err := store.GetLog(uint64(1), rl); err != nil {
t.Fatalf("Error getting log: %v", err)
}
if string(rl.Data) != "abcd" {
t.Fatalf("Expected %q, got %q", "abcd", rl.Data)
}
// Attempt to get the log, it should fail
rl = &raft.Log{}
if err := store.GetLog(uint64(2), rl); err == nil || !strings.Contains(err.Error(), "trying") {
t.Fatalf("Expected error about trying to decrypt data that is not, got %v", err)
}
store.Close()
cleanupRaftLog(t)
if err := os.MkdirAll(defaultRaftLog, os.ModeDir+os.ModePerm); err != nil {
t.Fatalf("Unable to create raft log directory: %v", err)
}
fileName = filepath.Join(defaultRaftLog, raftLogFile)
key := []byte("testkey")
store, err = newRaftLog(testLogger, fileName, false, 0, true, stores.CryptoCipherAES, key)
if err != nil {
t.Fatalf("Error creating store: %v", err)
}
defer store.Close()
if string(key) == "testkey" {
t.Fatalf("Key should have been erased")
}
expected := []*raft.Log{
{
Type: raft.LogCommand,
Index: 1,
Term: 1,
Data: []byte("msg1"),
},
{
Type: raft.LogCommand,
Index: 2,
Term: 1,
Data: []byte("msg2"),
},
{
Type: raft.LogCommand,
Index: 3,
Term: 1,
Data: []byte("msg3"),
},
}
if err := store.StoreLogs(expected); err != nil {
t.Fatalf("Error storing logs")
}
for i := 0; i < len(expected); i++ {
log := &raft.Log{}
if err := store.GetLog(uint64(i+1), log); err != nil {
t.Fatalf("Error getting log: %v", err)
}
if !reflect.DeepEqual(log, expected[i]) {
t.Fatalf("Expected %v, got %v", expected[i], log)
}
}
store.Close()
// Re-open with using env variable
os.Unsetenv(stores.CryptoStoreEnvKeyName)
defer os.Unsetenv(stores.CryptoStoreEnvKeyName)
if err := os.Setenv(stores.CryptoStoreEnvKeyName, "testkey"); err != nil {
t.Fatalf("Unable to set environment variable: %v", err)
}
store, err = newRaftLog(testLogger, fileName, false, 0, true, stores.CryptoCipherAES, nil)
if err != nil {
t.Fatalf("Error creating store: %v", err)
}
defer store.Close()
log := &raft.Log{}
if err := store.GetLog(uint64(1), log); err != nil {
t.Fatalf("Error getting log: %v", err)
}
if string(log.Data) != "msg1" {
t.Fatalf("Expected %q, got %q", "msg1", log.Data)
}
store.Close()
// Ensure that env key override config by providing a wrong key
// and notice that we have correct decrypt.
store, err = newRaftLog(testLogger, fileName, false, 0, true, stores.CryptoCipherAES, []byte("wrongkey"))
if err != nil {
t.Fatalf("Error creating store: %v", err)
}
defer store.Close()
log = &raft.Log{}
if err := store.GetLog(uint64(1), log); err != nil {
t.Fatalf("Error getting log: %v", err)
}
if string(log.Data) != "msg1" {
t.Fatalf("Expected %q, got %q", "msg1", log.Data)
}
store.Close()
// Now unset env variable and re-open with wrong key
os.Unsetenv(stores.CryptoStoreEnvKeyName)
store, err = newRaftLog(testLogger, fileName, false, 0, true, stores.CryptoCipherAES, []byte("wrongkey"))
if err != nil {
t.Fatalf("Error creating store: %v", err)
}
defer store.Close()
log = &raft.Log{}
if err := store.GetLog(uint64(1), log); err == nil || !strings.Contains(err.Error(), "authentication") {
t.Fatalf("Expected error about auth failure, got %v", err)
}
store.Close()
// Re-open with encryption but no key, this should fail.
store, err = newRaftLog(testLogger, fileName, false, 0, true, stores.CryptoCipherAES, nil)
if err == nil || !strings.Contains(err.Error(), stores.ErrCryptoStoreRequiresKey.Error()) {
if store != nil {
store.Close()
}
t.Fatalf("Expected error about missing key, got %v", err)
}
}
func TestRaftLogMultipleCiphers(t *testing.T) {
cleanupRaftLog(t)
defer cleanupRaftLog(t)
if err := os.MkdirAll(defaultRaftLog, os.ModeDir+os.ModePerm); err != nil {
t.Fatalf("Unable to create raft log directory: %v", err)
}
fileName := filepath.Join(defaultRaftLog, raftLogFile)
store, err := newRaftLog(testLogger, fileName, false, 0, false, stores.CryptoCipherAutoSelect, nil)
if err != nil {
t.Fatalf("Error creating store: %v", err)
}
defer store.Close()
payloads := [][]byte{
[]byte("this is a plain text message"),
[]byte("this is a message encrypted with AES cipher"),
[]byte("this is a message encrypted with CHACHA cipher"),
}
if err := store.StoreLog(&raft.Log{Index: 1, Term: 1, Type: raft.LogCommand, Data: payloads[0]}); err != nil {
t.Fatalf("Error storing log: %v", err)
}
store.Close()
storeWithEncryption := func(t *testing.T, encryptionCipher string, payloadIdx int) {
t.Helper()
store, err := newRaftLog(testLogger, fileName, false, 0, true, encryptionCipher, []byte("mykey"))
if err != nil {
t.Fatalf("Error creating store: %v", err)
}
defer store.Close()
if err := store.StoreLog(&raft.Log{Index: uint64(payloadIdx + 1), Term: 1, Type: raft.LogCommand, Data: payloads[payloadIdx]}); err != nil {
t.Fatalf("Error storing log: %v", err)
}
store.Close()
}
storeWithEncryption(t, stores.CryptoCipherAES, 1)
storeWithEncryption(t, stores.CryptoCipherChaChaPoly, 2)
// Now re-open with any cipher, use the auto-select one.
// We should be able to get all 3 messages correctly.
store, err = newRaftLog(testLogger, fileName, false, 0, true, stores.CryptoCipherAutoSelect, []byte("mykey"))
if err != nil {
t.Fatalf("Error creating store: %v", err)
}
defer store.Close()
for i := 0; i < 3; i++ {
l := &raft.Log{}
if err := store.GetLog(uint64(i+1), l); err != nil {
t.Fatalf("Error getting log: %v", err)
}
if !bytes.Equal(l.Data, payloads[i]) {
t.Fatalf("Expected message %q, got %q", payloads[i], l.Data)
}
}
}
func TestRaftLogChannelID(t *testing.T) {
cleanupRaftLog(t)
defer cleanupRaftLog(t)
store := createTestRaftLog(t, false, 0)
defer store.Close()
storeID := func(name string, id uint64) {
t.Helper()
if err := store.SetChannelID(name, id); err != nil {
t.Fatalf("Error storing channel ID: %v", err)
}
}
getID := func(name string, expected uint64) {
t.Helper()
if id, err := store.GetChannelID(name); err != nil || id != expected {
t.Fatalf("Expected ID for %q to be %v, got %v (err=%v)", name, expected, id, err)
}
}
deleteID := func(name string) {
t.Helper()
if err := store.DeleteChannelID(name); err != nil {
t.Fatalf("Error deleting channel %q id: %v", name, err)
}
}
// Store different channels
storeID("foo", 1)
storeID("bar", 2)
// Get returns what is expected
getID("foo", 1)
getID("bar", 2)
// Get for unknown channel returns 0, no error
getID("baz", 0)
// Update the ID
storeID("foo", 3)
// Check that new value is returned
getID("foo", 3)
// Delete a channel
deleteID("bar")
// and make sure that its ID is now returned as empty but no error
getID("bar", 0)
// Try to delete a channel that does not exist should not report an error
deleteID("baz")
store.Close()
store = createTestRaftLog(t, false, 0)
defer store.Close()
// Make sure that last ID is returned
getID("foo", 3)
// Recreate this channel with new ID
storeID("bar", 4)
// ID is as expected
getID("bar", 4)
// Delete all channels
deleteID("foo")
deleteID("bar")
store.Close()
store = createTestRaftLog(t, false, 0)
defer store.Close()
// No ID returned
getID("foo", 0)
getID("bar", 0)
getID("baz", 0)
}
func TestRaftLogCache(t *testing.T) {
cleanupRaftLog(t)
defer cleanupRaftLog(t)
store := createTestRaftLog(t, false, 0)
defer store.Close()
store.setCacheSize(10)
store.RLock()
lc := len(store.cache)
cs := store.cacheSize
store.RUnlock()
if lc != 10 {
t.Fatalf("Expected cache len to be 10, got %v", lc)
}
if cs != 10 {
t.Fatalf("Expected cacheSize to be 10, got %v", cs)
}
l1 := &raft.Log{Index: 1, Data: []byte("msg1")}
if err := store.StoreLog(l1); err != nil {
t.Fatalf("Error on store: %v", err)
}
l2 := &raft.Log{Index: 2, Data: []byte("msg2")}
l3 := &raft.Log{Index: 3, Data: []byte("msg3")}
if err := store.StoreLogs([]*raft.Log{l2, l3}); err != nil {
t.Fatalf("Error on store: %v", err)
}
store.RLock()
cl1 := store.cache[1%10]
cl2 := store.cache[2%10]
cl3 := store.cache[3%10]
store.RUnlock()
if cl1 == nil || cl2 == nil || cl3 == nil || cl1.Index != 1 || cl2.Index != 2 || cl3.Index != 3 {
t.Fatalf("Wrong content: l1=%v l2=%v l3=%v", cl1, cl2, cl3)
}
l11 := &raft.Log{Index: 11, Data: []byte("msg11")}
if err := store.StoreLog(l11); err != nil {
t.Fatalf("Error on store: %v", err)
}
var cl11 raft.Log
if err := store.GetLog(11, &cl11); err != nil || cl11.Index != 11 || string(cl11.Data) != "msg11" {
t.Fatalf("Unexpected err=%v msg=%v", err, cl11)
}
if err := store.DeleteRange(1, 2); err != nil {
t.Fatalf("Error on delete range: %v", err)
}
var err error
store.RLock()
lc = len(store.cache)
cs = store.cacheSize
for _, l := range store.cache {
if l != nil {
err = fmt.Errorf("Log still in cache: %v", l)
break
}
}
store.RUnlock()
if lc != 10 {
t.Fatalf("Expected cache len to be 10, got %v", lc)
}
if cs != 10 {
t.Fatalf("Expected cacheSize to be 10, got %v", cs)
}
if err != nil {
t.Fatal(err.Error())
}
// Now cause encoding to fail so that storelog fails and
// we check that log was not cached.
store.Lock()
store.conn.Close()
store.Unlock()
l4 := &raft.Log{Index: 4, Data: []byte("msg4")}
if err := store.StoreLog(l4); err == nil {
t.Fatal("Expected error on store")
}
store.RLock()
cl4 := store.cache[4%10]
store.RUnlock()
if cl4 != nil {
t.Fatalf("Expected log 4 not to be cached, got %v", cl4)
}
}