tidb util 源码
tidb util 代码
文件路径：/br/pkg/conn/util/util.go
// Copyright 2020 PingCAP, Inc. Licensed under Apache-2.0.
package util
import (
"context"
"github.com/pingcap/errors"
"github.com/pingcap/kvproto/pkg/metapb"
berrors "github.com/pingcap/tidb/br/pkg/errors"
"github.com/pingcap/tidb/util/engine"
pd "github.com/tikv/pd/client"
)
// StoreBehavior is the action to do in GetAllTiKVStores when a non-TiKV
// store (e.g. TiFlash store) is found.
type StoreBehavior uint8
const (
// ErrorOnTiFlash causes GetAllTiKVStores to return error when the store is
// found to be a TiFlash node.
ErrorOnTiFlash StoreBehavior = 0
// SkipTiFlash causes GetAllTiKVStores to skip the store when it is found to
// be a TiFlash node.
SkipTiFlash StoreBehavior = 1
// TiFlashOnly caused GetAllTiKVStores to skip the store which is not a
// TiFlash node.
TiFlashOnly StoreBehavior = 2
)
// GetAllTiKVStores returns all TiKV stores registered to the PD client. The
// stores must not be a tombstone and must never contain a label `engine=tiflash`.
func GetAllTiKVStores(
ctx context.Context,
pdClient pd.Client,
storeBehavior StoreBehavior,
) ([]*metapb.Store, error) {
// get all live stores.
stores, err := pdClient.GetAllStores(ctx, pd.WithExcludeTombstone())
if err != nil {
return nil, errors.Trace(err)
}
// filter out all stores which are TiFlash.
j := 0
for _, store := range stores {
isTiFlash := false
if engine.IsTiFlash(store) {
if storeBehavior == SkipTiFlash {
continue
} else if storeBehavior == ErrorOnTiFlash {
return nil, errors.Annotatef(berrors.ErrPDInvalidResponse,
"cannot restore to a cluster with active TiFlash stores (store %d at %s)", store.Id, store.Address)
}
isTiFlash = true
}
if !isTiFlash && storeBehavior == TiFlashOnly {
continue
}
stores[j] = store
j++
}
return stores[:j], nil
}
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