forked from pingcap/tidb
/
advancer_env.go
139 lines (124 loc) · 4.37 KB
/
advancer_env.go
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// Copyright 2022 PingCAP, Inc. Licensed under Apache-2.0.
package streamhelper
import (
"context"
"time"
logbackup "github.com/pingcap/kvproto/pkg/logbackuppb"
pd "github.com/tikv/pd/client"
"github.com/twotigers93/tidb/br/pkg/utils"
"github.com/twotigers93/tidb/config"
"github.com/twotigers93/tidb/util/engine"
clientv3 "go.etcd.io/etcd/client/v3"
"google.golang.org/grpc"
"google.golang.org/grpc/keepalive"
)
const (
logBackupServiceID = "log-backup-coordinator"
logBackupSafePointTTL = 24 * time.Hour
)
// Env is the interface required by the advancer.
type Env interface {
// The region scanner provides the region information.
TiKVClusterMeta
// LogBackupService connects to the TiKV, so we can collect the region checkpoints.
LogBackupService
// StreamMeta connects to the metadata service (normally PD).
StreamMeta
}
// PDRegionScanner is a simple wrapper over PD
// to adapt the requirement of `RegionScan`.
type PDRegionScanner struct {
pd.Client
}
// Updates the service GC safe point for the cluster.
// Returns the minimal service GC safe point across all services.
// If the arguments is `0`, this would remove the service safe point.
func (c PDRegionScanner) BlockGCUntil(ctx context.Context, at uint64) (uint64, error) {
return c.UpdateServiceGCSafePoint(ctx, logBackupServiceID, int64(logBackupSafePointTTL.Seconds()), at)
}
// RegionScan gets a list of regions, starts from the region that contains key.
// Limit limits the maximum number of regions returned.
func (c PDRegionScanner) RegionScan(ctx context.Context, key, endKey []byte, limit int) ([]RegionWithLeader, error) {
rs, err := c.Client.ScanRegions(ctx, key, endKey, limit)
if err != nil {
return nil, err
}
rls := make([]RegionWithLeader, 0, len(rs))
for _, r := range rs {
rls = append(rls, RegionWithLeader{
Region: r.Meta,
Leader: r.Leader,
})
}
return rls, nil
}
func (c PDRegionScanner) Stores(ctx context.Context) ([]Store, error) {
res, err := c.Client.GetAllStores(ctx, pd.WithExcludeTombstone())
if err != nil {
return nil, err
}
r := make([]Store, 0, len(res))
for _, re := range res {
if !engine.IsTiFlash(re) {
r = append(r, Store{
BootAt: uint64(re.StartTimestamp),
ID: re.GetId(),
})
}
}
return r, nil
}
// clusterEnv is the environment for running in the real cluster.
type clusterEnv struct {
clis *utils.StoreManager
*AdvancerExt
PDRegionScanner
}
// GetLogBackupClient gets the log backup client.
func (t clusterEnv) GetLogBackupClient(ctx context.Context, storeID uint64) (logbackup.LogBackupClient, error) {
var cli logbackup.LogBackupClient
err := t.clis.WithConn(ctx, storeID, func(cc *grpc.ClientConn) {
cli = logbackup.NewLogBackupClient(cc)
})
if err != nil {
return nil, err
}
return cli, nil
}
// CliEnv creates the Env for CLI usage.
func CliEnv(cli *utils.StoreManager, etcdCli *clientv3.Client) Env {
return clusterEnv{
clis: cli,
AdvancerExt: &AdvancerExt{MetaDataClient: *NewMetaDataClient(etcdCli)},
PDRegionScanner: PDRegionScanner{cli.PDClient()},
}
}
// TiDBEnv creates the Env by TiDB config.
func TiDBEnv(pdCli pd.Client, etcdCli *clientv3.Client, conf *config.Config) (Env, error) {
tconf, err := conf.GetTiKVConfig().Security.ToTLSConfig()
if err != nil {
return nil, err
}
return clusterEnv{
clis: utils.NewStoreManager(pdCli, keepalive.ClientParameters{
Time: time.Duration(conf.TiKVClient.GrpcKeepAliveTime) * time.Second,
Timeout: time.Duration(conf.TiKVClient.GrpcKeepAliveTimeout) * time.Second,
}, tconf),
AdvancerExt: &AdvancerExt{MetaDataClient: *NewMetaDataClient(etcdCli)},
PDRegionScanner: PDRegionScanner{Client: pdCli},
}, nil
}
type LogBackupService interface {
// GetLogBackupClient gets the log backup client.
GetLogBackupClient(ctx context.Context, storeID uint64) (logbackup.LogBackupClient, error)
}
// StreamMeta connects to the metadata service (normally PD).
// It provides the global checkpoint information.
type StreamMeta interface {
// Begin begins listen the task event change.
Begin(ctx context.Context, ch chan<- TaskEvent) error
// UploadV3GlobalCheckpointForTask uploads the global checkpoint to the meta store.
UploadV3GlobalCheckpointForTask(ctx context.Context, taskName string, checkpoint uint64) error
// ClearV3GlobalCheckpointForTask clears the global checkpoint to the meta store.
ClearV3GlobalCheckpointForTask(ctx context.Context, taskName string) error
}