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checker_kv_hash.go
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/
checker_kv_hash.go
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// Copyright 2018 The etcd Authors
//
// 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,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package tester
import (
"fmt"
"time"
"github.com/coreos/etcd/functional/rpcpb"
"go.uber.org/zap"
)
const retries = 7
type kvHashChecker struct {
ctype rpcpb.Checker
clus *Cluster
}
func newKVHashChecker(clus *Cluster) Checker {
return &kvHashChecker{
ctype: rpcpb.Checker_KV_HASH,
clus: clus,
}
}
func (hc *kvHashChecker) checkRevAndHashes() (err error) {
var (
revs map[string]int64
hashes map[string]int64
)
// retries in case of transient failure or etcd cluster has not stablized yet.
for i := 0; i < retries; i++ {
revs, hashes, err = hc.clus.getRevisionHash()
if err != nil {
hc.clus.lg.Warn(
"failed to get revision and hash",
zap.Int("retries", i),
zap.Error(err),
)
} else {
sameRev := getSameValue(revs)
sameHashes := getSameValue(hashes)
if sameRev && sameHashes {
return nil
}
hc.clus.lg.Warn(
"retrying; etcd cluster is not stable",
zap.Int("retries", i),
zap.Bool("same-revisions", sameRev),
zap.Bool("same-hashes", sameHashes),
zap.String("revisions", fmt.Sprintf("%+v", revs)),
zap.String("hashes", fmt.Sprintf("%+v", hashes)),
)
}
time.Sleep(time.Second)
}
if err != nil {
return fmt.Errorf("failed revision and hash check (%v)", err)
}
return fmt.Errorf("etcd cluster is not stable: [revisions: %v] and [hashes: %v]", revs, hashes)
}
func (hc *kvHashChecker) Type() rpcpb.Checker {
return hc.ctype
}
func (hc *kvHashChecker) EtcdClientEndpoints() []string {
return hc.clus.EtcdClientEndpoints()
}
func (hc *kvHashChecker) Check() error {
return hc.checkRevAndHashes()
}