/
manager.go
267 lines (242 loc) · 6.73 KB
/
manager.go
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// Copyright 2022 PingCAP, 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,
// See the License for the specific language governing permissions and
// limitations under the License.
package upstream
import (
"context"
"strings"
"sync"
"time"
"github.com/benbjohnson/clock"
"github.com/pingcap/log"
"github.com/pingcap/tiflow/cdc/model"
cerror "github.com/pingcap/tiflow/pkg/errors"
"github.com/pingcap/tiflow/pkg/etcd"
"github.com/pingcap/tiflow/pkg/orchestrator"
"github.com/pingcap/tiflow/pkg/security"
pd "github.com/tikv/pd/client"
"go.uber.org/atomic"
"go.uber.org/zap"
)
// testUpstreamID is a pseudo upstreamID for now. It will be removed in the future.
const testUpstreamID uint64 = 0
// tickInterval is the minimum interval that upstream manager to check upstreams
var tickInterval = 3 * time.Minute
// CaptureTopologyCfg stores the information of the capture topology.
type CaptureTopologyCfg struct {
*model.CaptureInfo
// GCServiceID identify the cdc cluster gc service id
GCServiceID string
SessionTTL int64
}
// Manager manages all upstream.
type Manager struct {
// upstreamID map to *Upstream.
ups *sync.Map
// all upstream should be spawn from this ctx.
ctx context.Context
// Only use in Close().
cancel func()
// lock this mutex when add or delete a value of Manager.ups.
mu sync.Mutex
defaultUpstream *Upstream
lastTickTime atomic.Time
initUpstreamFunc func(context.Context, *Upstream, CaptureTopologyCfg) error
captureCfg CaptureTopologyCfg
}
// NewManager creates a new Manager.
// ctx will be used to initialize upstream spawned by this Manager.
func NewManager(ctx context.Context, cfg CaptureTopologyCfg) *Manager {
ctx, cancel := context.WithCancel(ctx)
return &Manager{
ups: new(sync.Map),
ctx: ctx,
cancel: cancel,
initUpstreamFunc: initUpstream,
captureCfg: cfg,
}
}
// NewManager4Test returns a Manager for unit test.
func NewManager4Test(pdClient pd.Client) *Manager {
up := NewUpstream4Test(pdClient)
res := &Manager{
ups: new(sync.Map), ctx: context.Background(),
defaultUpstream: up,
cancel: func() {},
captureCfg: CaptureTopologyCfg{
GCServiceID: etcd.GcServiceIDForTest(),
},
}
up.isDefaultUpstream = true
res.ups.Store(testUpstreamID, up)
return res
}
// AddDefaultUpstream add the default upstream
func (m *Manager) AddDefaultUpstream(
pdEndpoints []string,
conf *security.Credential,
pdClient pd.Client,
etcdClient *etcd.Client,
) (*Upstream, error) {
// use the pdClient and etcdClient pass from cdc server as the default upstream
// to reduce the creation times of pdClient to make cdc server more stable
up := &Upstream{
PdEndpoints: pdEndpoints,
SecurityConfig: conf,
PDClient: pdClient,
etcdCli: etcdClient,
isDefaultUpstream: true,
status: uninit,
wg: new(sync.WaitGroup),
clock: clock.New(),
}
if err := m.initUpstreamFunc(m.ctx, up, m.captureCfg); err != nil {
return nil, err
}
m.defaultUpstream = up
m.ups.Store(up.ID, up)
log.Info("default upstream is added", zap.Uint64("id", up.ID))
return up, nil
}
// GetDefaultUpstream returns the default upstream
func (m *Manager) GetDefaultUpstream() (*Upstream, error) {
if m.defaultUpstream == nil {
return nil, cerror.ErrUpstreamNotFound
}
return m.defaultUpstream, nil
}
func (m *Manager) add(upstreamID uint64,
pdEndpoints []string, conf *security.Credential,
) *Upstream {
m.mu.Lock()
defer m.mu.Unlock()
v, ok := m.ups.Load(upstreamID)
if ok {
up := v.(*Upstream)
up.resetIdleTime()
return up
}
securityConf := &security.Credential{}
if conf != nil {
securityConf = &security.Credential{
CAPath: conf.CAPath,
CertPath: conf.CertPath,
KeyPath: conf.KeyPath,
CertAllowedCN: conf.CertAllowedCN,
}
}
up := newUpstream(pdEndpoints, securityConf)
m.ups.Store(upstreamID, up)
go func() {
err := m.initUpstreamFunc(m.ctx, up, m.captureCfg)
up.err.Store(err)
}()
up.resetIdleTime()
log.Info("new upstream is added", zap.Uint64("id", up.ID))
return up
}
// AddUpstream adds an upstream and init it.
func (m *Manager) AddUpstream(info *model.UpstreamInfo) *Upstream {
return m.add(info.ID,
strings.Split(info.PDEndpoints, ","),
&security.Credential{
CAPath: info.CAPath,
CertPath: info.CertPath,
KeyPath: info.KeyPath,
CertAllowedCN: info.CertAllowedCN,
})
}
// Get gets a upstream by upstreamID.
func (m *Manager) Get(upstreamID uint64) (*Upstream, bool) {
v, ok := m.ups.Load(upstreamID)
if !ok {
return nil, false
}
up := v.(*Upstream)
return up, true
}
// Close closes all upstreams.
// Please make sure it will only be called once when capture exits.
func (m *Manager) Close() {
m.cancel()
m.ups.Range(func(k, v interface{}) bool {
v.(*Upstream).Close()
m.ups.Delete(k)
return true
})
}
// Visit on each upstream, return error on the first
func (m *Manager) Visit(visitor func(up *Upstream) error) error {
var err error
m.ups.Range(func(k, v interface{}) bool {
err = visitor(v.(*Upstream))
return err == nil
})
return err
}
// Tick checks and frees upstream that have not been used
// for a long time to save resources.
// It's a thread-safe method.
func (m *Manager) Tick(ctx context.Context,
globalState *orchestrator.GlobalReactorState,
) error {
if time.Since(m.lastTickTime.Load()) < tickInterval {
return nil
}
activeUpstreams := make(map[uint64]struct{})
for _, cf := range globalState.Changefeeds {
if cf != nil && cf.Info != nil {
activeUpstreams[cf.Info.UpstreamID] = struct{}{}
}
}
m.mu.Lock()
defer m.mu.Unlock()
var err error
m.ups.Range(func(k, v interface{}) bool {
select {
case <-ctx.Done():
err = ctx.Err()
return false
default:
}
id := k.(uint64)
up := v.(*Upstream)
if up.isDefaultUpstream {
return true
}
// remove failed upstream
if up.Error() != nil {
log.Warn("upstream init failed, remove it from manager",
zap.Uint64("id", up.ID),
zap.Error(up.Error()))
go up.Close()
m.ups.Delete(id)
return true
}
_, ok := activeUpstreams[id]
if ok {
return true
}
up.trySetIdleTime()
log.Info("no active changefeed found, try to close upstream",
zap.Uint64("id", up.ID))
if up.shouldClose() {
log.Info("upstream should be closed ,remove it from manager",
zap.Uint64("id", up.ID))
go up.Close()
m.ups.Delete(id)
}
return true
})
m.lastTickTime.Store(time.Now())
return err
}