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[Feat] support slb connection rebalance in ODP mode (#123)
* [Feat] support slb connection rebalance in ODP mode * [Fix] review
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,122 @@ | ||
| /*- | ||
| * #%L | ||
| * OBKV Table Client Framework | ||
| * %% | ||
| * Copyright (C) 2023 OceanBase | ||
| * %% | ||
| * OBKV Table Client Framework is licensed under Mulan PSL v2. | ||
| * You can use this software according to the terms and conditions of the Mulan PSL v2. | ||
| * You may obtain a copy of Mulan PSL v2 at: | ||
| * http://license.coscl.org.cn/MulanPSL2 | ||
| * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, | ||
| * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, | ||
| * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE. | ||
| * See the Mulan PSL v2 for more details. | ||
| * #L% | ||
| */ | ||
|
|
||
| package obkvrpc | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "github.com/oceanbase/obkv-table-client-go/log" | ||
| "go.uber.org/zap" | ||
| "math" | ||
| "time" | ||
| ) | ||
|
|
||
| type ConnectionLifeCycleMgr struct { | ||
| connPool *ConnectionPool | ||
| maxConnectionAge time.Duration | ||
| lastExpireIdx int | ||
| } | ||
|
|
||
| func (s *ConnectionLifeCycleMgr) String() string { | ||
| return fmt.Sprintf("ConnectionLifeCycleMgr{connPool: %p, maxConnectionAge: %d,lastExpireIdx: %d}", | ||
| s.connPool, s.maxConnectionAge, s.lastExpireIdx) | ||
| } | ||
|
|
||
| func NewConnectionLifeCycleMgr(connPool *ConnectionPool, maxConnectionAge time.Duration) *ConnectionLifeCycleMgr { | ||
| connLifeCycleMgr := &ConnectionLifeCycleMgr{ | ||
| connPool: connPool, | ||
| maxConnectionAge: maxConnectionAge, | ||
| lastExpireIdx: 0, | ||
| } | ||
| return connLifeCycleMgr | ||
| } | ||
|
|
||
| // check and reconnect timeout connections | ||
| func (c *ConnectionLifeCycleMgr) run() { | ||
| if c.connPool == nil { | ||
| log.Error("connection pool is null") | ||
| return | ||
| } | ||
|
|
||
| // 1. get all timeout connections | ||
| expiredConnIds := make([]int, 0, len(c.connPool.connections)) | ||
| for i := 1; i <= len(c.connPool.connections); i++ { | ||
| connection := c.connPool.connections[(i+c.lastExpireIdx)%(len(c.connPool.connections))] | ||
| if !connection.expireTime.IsZero() && connection.expireTime.Before(time.Now()) { | ||
| expiredConnIds = append(expiredConnIds, (i+c.lastExpireIdx)%(len(c.connPool.connections))) | ||
| } | ||
| } | ||
|
|
||
| if len(expiredConnIds) > 0 { | ||
| log.Info(fmt.Sprintf("Find %d expired connections", len(expiredConnIds))) | ||
| for idx, connIdx := range expiredConnIds { | ||
| log.Info(fmt.Sprintf("%d: ip=%s, port=%d", idx, c.connPool.connections[connIdx].option.ip, c.connPool.connections[connIdx].option.port)) | ||
| } | ||
| } | ||
|
|
||
| // 2. mark 30% expired connections as expired | ||
| maxReconnIdx := int(math.Ceil(float64(len(expiredConnIds)) / 3)) | ||
| if maxReconnIdx > 0 { | ||
| c.lastExpireIdx = expiredConnIds[maxReconnIdx-1] | ||
| log.Info(fmt.Sprintf("Begin to refresh expired connections which idx less than %d", maxReconnIdx)) | ||
| } | ||
| for i := 0; i < maxReconnIdx; i++ { | ||
| // no one can get expired connection | ||
| c.connPool.connections[expiredConnIds[i]].isExpired.Store(true) | ||
| } | ||
| defer func() { | ||
| for i := 0; i < maxReconnIdx; i++ { | ||
| c.connPool.connections[expiredConnIds[i]].isExpired.Store(false) | ||
| } | ||
| }() | ||
|
|
||
| // 3. wait all expired connection finished | ||
| time.Sleep(DefaultConnectWaitTime) | ||
| for i := 0; i < maxReconnIdx; i++ { | ||
| pool := c.connPool.connections | ||
| idx := expiredConnIds[i] | ||
| for j := 0; len(pool[idx].pending) > 0; j++ { | ||
| time.Sleep(time.Duration(10) * time.Millisecond) | ||
| if j > 0 && j%100 == 0 { | ||
| log.Info(fmt.Sprintf("Wait too long time for the connection to end,"+ | ||
| "connection idx: %d, ip:%s, port:%d, current connection pending size: %d", | ||
| idx, pool[idx].option.ip, pool[idx].option.port, len(pool[idx].pending))) | ||
| } | ||
|
|
||
| if j > 3000 { | ||
| log.Warn("Wait too much time for the connection to end, stop ConnectionLifeCycleMgr") | ||
| return | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // 4. close and reconnect all expired connections | ||
| ctx, _ := context.WithTimeout(context.Background(), c.connPool.option.connectTimeout) | ||
| for i := 0; i < maxReconnIdx; i++ { | ||
| // close and reconnect | ||
| c.connPool.connections[expiredConnIds[i]].Close() | ||
| _, err := c.connPool.RecreateConnection(ctx, expiredConnIds[i]) | ||
| if err != nil { | ||
| log.Warn("reconnect failed", zap.Error(err)) | ||
| return | ||
| } | ||
| } | ||
| if maxReconnIdx > 0 { | ||
| log.Info(fmt.Sprintf("Finish to refresh expired connections which idx less than %d", maxReconnIdx)) | ||
| } | ||
| } |
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