mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-01-19 02:48:24 +00:00
add distributed lock manager
This commit is contained in:
chrislu
parent
ee4f7cd636
commit
464a71a373
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@ -460,7 +460,7 @@ message UnlockResponse {
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message Lock {
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string name = 1;
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string renew_token = 2;
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int64 expiration_ns = 3;
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int64 expired_at_ns = 3;
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}
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message TransferLocksRequest {
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repeated Lock locks = 1;
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50
weed/cluster/lock_manager/distributed_lock_manager.go
Normal file
50
weed/cluster/lock_manager/distributed_lock_manager.go
Normal file
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@ -0,0 +1,50 @@
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package lock_manager
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import (
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"github.com/seaweedfs/seaweedfs/weed/pb"
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)
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type DistributedLockManager struct {
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lockManager *LockManager
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}
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func NewDistributedLockManager() *DistributedLockManager {
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return &DistributedLockManager{
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lockManager: NewLockManager(),
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}
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}
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func (dlm *DistributedLockManager) Lock(host pb.ServerAddress, key string, expiredAtNs int64, token string, servers []pb.ServerAddress) (renewToken string, movedTo pb.ServerAddress, err error) {
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server := HashKeyToServer(key, servers)
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if server != host {
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movedTo = server
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return
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}
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renewToken, err = dlm.lockManager.Lock(key, expiredAtNs, token)
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return
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}
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func (dlm *DistributedLockManager) Unlock(host pb.ServerAddress, key string, token string, servers []pb.ServerAddress) (movedTo pb.ServerAddress, err error) {
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server := HashKeyToServer(key, servers)
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if server != host {
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movedTo = server
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return
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}
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_, err = dlm.lockManager.Unlock(key, token)
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return
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}
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// InsertLock is used to insert a lock to a server unconditionally
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// It is used when a server is down and the lock is moved to another server
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func (dlm *DistributedLockManager) InsertLock(key string, expiredAtNs int64, token string) {
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dlm.lockManager.InsertLock(key, expiredAtNs, token)
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}
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func (dlm *DistributedLockManager) SelectNotOwnedLocks(host pb.ServerAddress, servers []pb.ServerAddress) (locks []*Lock) {
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return dlm.lockManager.SelectLocks(func(key string) bool {
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server := HashKeyToServer(key, servers)
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return server != host
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})
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}
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func (dlm *DistributedLockManager) CalculateTargetServer(key string, servers []pb.ServerAddress) pb.ServerAddress {
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return HashKeyToServer(key, servers)
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}
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@ -13,7 +13,7 @@ type LockManager struct {
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}
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type Lock struct {
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Token string
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ExpirationNs int64
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ExpiredAtNs int64
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Key string // only used for moving locks
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}
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@ -25,32 +25,37 @@ func NewLockManager() *LockManager {
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return t
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}
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func (lm *LockManager) Lock(path string, ttlDuration time.Duration, token string) (renewToken string, err error) {
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func (lm *LockManager) Lock(path string, expiredAtNs int64, token string) (renewToken string, err error) {
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lm.locks.Compute(path, func(oldValue *Lock, loaded bool) (newValue *Lock, delete bool) {
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if oldValue != nil {
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now := time.Now()
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if oldValue.ExpirationNs > 0 && oldValue.ExpirationNs < now.UnixNano() {
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if oldValue.ExpiredAtNs > 0 && oldValue.ExpiredAtNs < time.Now().UnixNano() {
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// lock is expired, set to a new lock
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expirationNs := time.Now().Add(ttlDuration).UnixNano()
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return &Lock{Token: token, ExpirationNs: expirationNs}, false
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if token != "" {
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err = fmt.Errorf("lock: non-empty token on an expired lock")
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return nil, false
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} else {
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// new lock
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renewToken = uuid.New().String()
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return &Lock{Token: renewToken, ExpiredAtNs: expiredAtNs}, false
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}
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}
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// not expired
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if oldValue.Token == token {
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expirationNs := time.Now().Add(ttlDuration).UnixNano()
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return &Lock{Token: token, ExpirationNs: expirationNs}, false
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// token matches, renew the lock
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return &Lock{Token: token, ExpiredAtNs: expiredAtNs}, false
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} else {
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err = fmt.Errorf("lock: token mismatch")
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return oldValue, false
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}
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} else {
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expirationNs := time.Now().Add(ttlDuration).UnixNano()
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if token == "" {
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// new lock
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renewToken = uuid.New().String()
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return &Lock{Token: renewToken, ExpirationNs: expirationNs}, false
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return &Lock{Token: renewToken, ExpiredAtNs: expiredAtNs}, false
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} else {
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err = fmt.Errorf("lock: non-empty token on a new lock")
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return nil, false
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}
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return &Lock{Token: token, ExpirationNs: expirationNs}, false
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}
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})
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return
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@ -60,13 +65,13 @@ func (lm *LockManager) Unlock(path string, token string) (isUnlocked bool, err e
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lm.locks.Compute(path, func(oldValue *Lock, loaded bool) (newValue *Lock, delete bool) {
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if oldValue != nil {
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now := time.Now()
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if oldValue.ExpirationNs > 0 && oldValue.ExpirationNs < now.UnixNano() {
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if oldValue.ExpiredAtNs > 0 && oldValue.ExpiredAtNs < now.UnixNano() {
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// lock is expired, delete it
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isUnlocked = true
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return nil, true
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}
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if oldValue.Token == token {
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if oldValue.ExpirationNs <= now.UnixNano() {
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if oldValue.ExpiredAtNs <= now.UnixNano() {
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isUnlocked = true
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return nil, true
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}
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@ -89,7 +94,7 @@ func (lm *LockManager) CleanUp() {
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time.Sleep(1 * time.Minute)
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now := time.Now().UnixNano()
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lm.locks.Range(func(key string, value *Lock) bool {
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if now > value.ExpirationNs {
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if now > value.ExpiredAtNs {
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lm.locks.Delete(key)
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return true
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}
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@ -98,16 +103,16 @@ func (lm *LockManager) CleanUp() {
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}
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}
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// TakeOutLocksByKey takes out locks by key
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// SelectLocks takes out locks by key
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// if keyFn return true, the lock will be taken out
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func (lm *LockManager) TakeOutLocksByKey(keyFn func(key string) bool) (locks []*Lock) {
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func (lm *LockManager) SelectLocks(selectFn func(key string) bool) (locks []*Lock) {
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now := time.Now().UnixNano()
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lm.locks.Range(func(key string, lock *Lock) bool {
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if now > lock.ExpirationNs {
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if now > lock.ExpiredAtNs {
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lm.locks.Delete(key)
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return true
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}
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if keyFn(key) {
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if selectFn(key) {
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lm.locks.Delete(key)
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lock.Key = key
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locks = append(locks, lock)
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@ -116,3 +121,8 @@ func (lm *LockManager) TakeOutLocksByKey(keyFn func(key string) bool) (locks []*
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})
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return
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}
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// InsertLock inserts a lock unconditionally
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func (lm *LockManager) InsertLock(path string, expiredAtNs int64, token string) {
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lm.locks.Store(path, &Lock{Token: token, ExpiredAtNs: expiredAtNs})
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}
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@ -460,7 +460,7 @@ message UnlockResponse {
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message Lock {
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string name = 1;
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string renew_token = 2;
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int64 expiration_ns = 3;
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int64 expired_at_ns = 3;
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}
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message TransferLocksRequest {
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repeated Lock locks = 1;
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@ -3855,7 +3855,7 @@ type Lock struct {
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Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
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RenewToken string `protobuf:"bytes,2,opt,name=renew_token,json=renewToken,proto3" json:"renew_token,omitempty"`
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ExpirationNs int64 `protobuf:"varint,3,opt,name=expiration_ns,json=expirationNs,proto3" json:"expiration_ns,omitempty"`
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ExpiredAtNs int64 `protobuf:"varint,3,opt,name=expired_at_ns,json=expiredAtNs,proto3" json:"expired_at_ns,omitempty"`
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}
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func (x *Lock) Reset() {
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@ -3904,9 +3904,9 @@ func (x *Lock) GetRenewToken() string {
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return ""
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}
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func (x *Lock) GetExpirationNs() int64 {
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func (x *Lock) GetExpiredAtNs() int64 {
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if x != nil {
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return x.ExpirationNs
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return x.ExpiredAtNs
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}
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return 0
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}
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@ -4694,146 +4694,146 @@ var file_filer_proto_rawDesc = []byte{
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0x74, 0x1a, 0x18, 0x2e, 0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e, 0x55, 0x6e, 0x6c,
|
||||
0x6f, 0x63, 0x6b, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22, 0x00, 0x12, 0x52, 0x0a,
|
||||
0x0d, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x66, 0x65, 0x72, 0x4c, 0x6f, 0x63, 0x6b, 0x73, 0x12, 0x1e,
|
||||
0x2e, 0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x66,
|
||||
0x65, 0x72, 0x4c, 0x6f, 0x63, 0x6b, 0x73, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x1f,
|
||||
0x2e, 0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x66,
|
||||
0x65, 0x72, 0x4c, 0x6f, 0x63, 0x6b, 0x73, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22,
|
||||
0x00, 0x42, 0x4f, 0x0a, 0x10, 0x73, 0x65, 0x61, 0x77, 0x65, 0x65, 0x64, 0x66, 0x73, 0x2e, 0x63,
|
||||
0x6c, 0x69, 0x65, 0x6e, 0x74, 0x42, 0x0a, 0x46, 0x69, 0x6c, 0x65, 0x72, 0x50, 0x72, 0x6f, 0x74,
|
||||
0x6f, 0x5a, 0x2f, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x73, 0x65,
|
||||
0x61, 0x77, 0x65, 0x65, 0x64, 0x66, 0x73, 0x2f, 0x73, 0x65, 0x61, 0x77, 0x65, 0x65, 0x64, 0x66,
|
||||
0x73, 0x2f, 0x77, 0x65, 0x65, 0x64, 0x2f, 0x70, 0x62, 0x2f, 0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f,
|
||||
0x70, 0x62, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
|
||||
}
|
||||
|
||||
var (
|
||||
|
|
|
|||
|
|
@ -3,7 +3,6 @@ package weed_server
|
|||
import (
|
||||
"context"
|
||||
"fmt"
|
||||
"github.com/seaweedfs/seaweedfs/weed/cluster/lock_manager"
|
||||
"github.com/seaweedfs/seaweedfs/weed/glog"
|
||||
"github.com/seaweedfs/seaweedfs/weed/pb"
|
||||
"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
|
||||
|
|
@ -18,21 +17,17 @@ func (fs *FilerServer) Lock(ctx context.Context, req *filer_pb.LockRequest) (res
|
|||
if snapshot == nil {
|
||||
resp.Error = "no lock server found"
|
||||
return
|
||||
} else {
|
||||
server := lock_manager.HashKeyToServer(req.Name, snapshot)
|
||||
if server != fs.option.Host {
|
||||
resp.Error = fmt.Sprintf("not the lock server for %s", req.Name)
|
||||
resp.MovedTo = string(server)
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
renewToken, err := fs.dlm.Lock(req.Name, time.Duration(req.SecondsToLock)*time.Second, req.PreviousLockToken)
|
||||
var movedTo pb.ServerAddress
|
||||
expiredAtNs := time.Now().Add(time.Duration(req.SecondsToLock) * time.Second).UnixNano()
|
||||
resp.RenewToken, movedTo, err = fs.dlm.Lock(fs.option.Host, req.Name, expiredAtNs, req.PreviousLockToken, snapshot)
|
||||
|
||||
if err != nil {
|
||||
resp.Error = fmt.Sprintf("%v", err)
|
||||
} else {
|
||||
resp.RenewToken = renewToken
|
||||
}
|
||||
if movedTo != "" {
|
||||
resp.MovedTo = string(movedTo)
|
||||
}
|
||||
|
||||
return resp, nil
|
||||
|
|
@ -46,16 +41,9 @@ func (fs *FilerServer) Unlock(ctx context.Context, req *filer_pb.UnlockRequest)
|
|||
if snapshot == nil {
|
||||
resp.Error = "no lock server found"
|
||||
return
|
||||
} else {
|
||||
server := lock_manager.HashKeyToServer(req.Name, snapshot)
|
||||
if server != fs.option.Host {
|
||||
resp.Error = fmt.Sprintf("not the lock server for %s", req.Name)
|
||||
resp.MovedTo = string(server)
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
_, err = fs.dlm.Unlock(req.Name, req.LockToken)
|
||||
_, err = fs.dlm.Unlock(fs.option.Host, req.Name, req.LockToken, snapshot)
|
||||
if err != nil {
|
||||
resp.Error = fmt.Sprintf("%v", err)
|
||||
}
|
||||
|
|
@ -67,13 +55,8 @@ func (fs *FilerServer) Unlock(ctx context.Context, req *filer_pb.UnlockRequest)
|
|||
// TransferLocks is a grpc handler to handle FilerServer's TransferLocksRequest
|
||||
func (fs *FilerServer) TransferLocks(ctx context.Context, req *filer_pb.TransferLocksRequest) (*filer_pb.TransferLocksResponse, error) {
|
||||
|
||||
now := time.Now()
|
||||
for _, lock := range req.Locks {
|
||||
duration := time.Duration(lock.ExpirationNs - now.UnixNano())
|
||||
if _, err := fs.dlm.Lock(lock.Name, duration, lock.RenewToken); err != nil {
|
||||
glog.Errorf("receive transferred lock %v to %v: %v", lock.Name, fs.option.Host, err)
|
||||
return nil, err
|
||||
}
|
||||
fs.dlm.InsertLock(lock.Name, lock.ExpiredAtNs, lock.RenewToken)
|
||||
}
|
||||
|
||||
return &filer_pb.TransferLocksResponse{}, nil
|
||||
|
|
@ -81,23 +64,20 @@ func (fs *FilerServer) TransferLocks(ctx context.Context, req *filer_pb.Transfer
|
|||
}
|
||||
|
||||
func (fs *FilerServer) OnDlmChangeSnapshot(snapshot []pb.ServerAddress) {
|
||||
locks := fs.dlm.TakeOutLocksByKey(func(key string) bool {
|
||||
server := lock_manager.HashKeyToServer(key, snapshot)
|
||||
return server != fs.option.Host
|
||||
})
|
||||
locks := fs.dlm.SelectNotOwnedLocks(fs.option.Host, snapshot)
|
||||
if len(locks) == 0 {
|
||||
return
|
||||
}
|
||||
|
||||
for _, lock := range locks {
|
||||
server := lock_manager.HashKeyToServer(lock.Key, snapshot)
|
||||
server := fs.dlm.CalculateTargetServer(lock.Key, snapshot)
|
||||
if err := pb.WithFilerClient(false, 0, server, fs.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
|
||||
_, err := client.TransferLocks(context.Background(), &filer_pb.TransferLocksRequest{
|
||||
Locks: []*filer_pb.Lock{
|
||||
{
|
||||
Name: lock.Key,
|
||||
RenewToken: lock.Token,
|
||||
ExpirationNs: lock.ExpirationNs,
|
||||
ExpiredAtNs: lock.ExpiredAtNs,
|
||||
},
|
||||
},
|
||||
})
|
||||
|
|
|
|||
|
|
@ -97,7 +97,7 @@ type FilerServer struct {
|
|||
knownListeners map[int32]int32
|
||||
|
||||
// distributed lock manager
|
||||
dlm *lock_manager.LockManager
|
||||
dlm *lock_manager.DistributedLockManager
|
||||
}
|
||||
|
||||
func NewFilerServer(defaultMux, readonlyMux *http.ServeMux, option *FilerOption) (fs *FilerServer, err error) {
|
||||
|
|
@ -185,7 +185,7 @@ func NewFilerServer(defaultMux, readonlyMux *http.ServeMux, option *FilerOption)
|
|||
fs.filer.Shutdown()
|
||||
})
|
||||
|
||||
fs.dlm = lock_manager.NewLockManager()
|
||||
fs.dlm = lock_manager.NewDistributedLockManager()
|
||||
fs.filer.LockRing.SetTakeSnapshotCallback(fs.OnDlmChangeSnapshot)
|
||||
|
||||
return fs, nil
|
||||
|
|
|
|||
Loading…
Reference in a new issue