/
restore.go
115 lines (96 loc) · 1.96 KB
/
restore.go
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package cmd
import (
"bytes"
"context"
"encoding/gob"
"errors"
"fmt"
"io/ioutil"
"time"
"github.com/urfave/cli"
"go.etcd.io/etcd/clientv3"
"github.com/coreos/etcd/mvcc/mvccpb"
)
func restoreCmd() cli.Command {
return cli.Command{
Name: "restore",
Usage: "restore K/V from file",
Action: restoreAction,
Flags: []cli.Flag{
cli.StringFlag{
Name: "address, a",
Usage: "etcd address",
Value: defaultEtcdAddress,
Required: false,
},
cli.StringFlag{
Name: "file, f",
Usage: "restore from `FILE`",
Required: true,
},
cli.BoolFlag{
Name: "silent, s",
Usage: "verbose mode",
Required: false,
},
},
}
}
func restoreAction(c *cli.Context) error {
address := c.String("address")
if len(address) == 0 {
return errors.New("address shouldn't be empty")
}
file := c.String("file")
if len(file) == 0 {
return errors.New("file shouldn't be empty")
}
silent := c.Bool("silent")
return restore(address, file, !silent)
}
func restore(addr, filename string, print bool) error {
dd, err := readDumpData(filename)
if err != nil {
return err
}
cli, err := clientv3.New(clientv3.Config{
Endpoints: []string{addr},
DialTimeout: 5 * time.Second,
})
if err != nil {
return err
}
defer cli.Close()
ctx := context.Background()
for _, kvB := range dd {
var kv mvccpb.KeyValue
if err := kv.Unmarshal(kvB); err != nil {
return err
}
pCtx, kCancel := context.WithTimeout(ctx, 5*time.Second)
_, err = cli.Put(pCtx, string(kv.Key), string(kv.Value))
kCancel()
if err != nil {
return err
}
if print {
fmt.Println(string(kv.Key))
}
}
return nil
}
func readDumpData(filename string) (dumpData, error) {
b, err := ioutil.ReadFile(filename)
if err != nil {
return nil, err
}
dd := make(dumpData, 0)
var buffer bytes.Buffer
buffer.Write(b)
dec := gob.NewDecoder(&buffer)
err = dec.Decode(&dd)
if err != nil {
return nil, err
}
return dd, nil
}