mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
c09aca1ba4
Motivation is as follows: - etcdctl we only depend on clientv3 APIs, no dependencies of bolt, backend, mvcc, file-layout - etcdctl can be officially supported across wide range of versions, while etcdutl is pretty specific to file format at particular version. it's step towards desired modules layout, documented in: https://etcd.io/docs/next/dev-internal/modules/
73 lines
1.9 KiB
Go
73 lines
1.9 KiB
Go
// Copyright 2021 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package etcdutl
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import (
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"fmt"
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"os"
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"time"
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"github.com/spf13/cobra"
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"go.etcd.io/etcd/pkg/v3/cobrautl"
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"go.etcd.io/etcd/server/v3/datadir"
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"go.etcd.io/etcd/server/v3/mvcc/backend"
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)
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var (
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defragDataDir string
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)
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// NewDefragCommand returns the cobra command for "Defrag".
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func NewDefragCommand() *cobra.Command {
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cmd := &cobra.Command{
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Use: "defrag",
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Short: "Defragments the storage of the etcd",
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Run: defragCommandFunc,
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}
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cmd.Flags().StringVar(&defragDataDir, "data-dir", "", "Required. Defragments a data directory not in use by etcd.")
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cmd.MarkFlagRequired("data-dir")
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return cmd
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}
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func defragCommandFunc(cmd *cobra.Command, args []string) {
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err := DefragData(defragDataDir)
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if err != nil {
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cobrautl.ExitWithError(cobrautl.ExitError,
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fmt.Errorf("Failed to defragment etcd data[%s] (%v)", defragDataDir, err))
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}
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}
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func DefragData(dataDir string) error {
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var be backend.Backend
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lg := GetLogger()
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bch := make(chan struct{})
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dbDir := datadir.ToBackendFileName(dataDir)
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go func() {
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defer close(bch)
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cfg := backend.DefaultBackendConfig()
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cfg.Logger = lg
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cfg.Path = dbDir
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be = backend.New(cfg)
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}()
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select {
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case <-bch:
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case <-time.After(time.Second):
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fmt.Fprintf(os.Stderr, "waiting for etcd to close and release its lock on %q. "+
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"To defrag a running etcd instance, omit --data-dir.\n", dbDir)
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<-bch
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}
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return be.Defrag()
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}
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