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// Package main provides ...
package main
import (
"context"
"errors"
"flag"
"fmt"
"log"
"net"
"os"
"os/exec"
"strconv"
"time"
"github.com/qiniu/api.v7/auth/qbox"
"github.com/qiniu/api.v7/storage"
)
var (
interval time.Duration // 间隔时间
long int // 保留天数
backupDB string // 备份数据库
bucket string // 七牛云空间
domain string // 七牛云域名
accessKey string // 七牛云 AccessKey
secretKey string // 七牛云 SecretKey
err error
inter string
)
func init() {
flag.IntVar(&long, "l", 30, "how many days")
flag.StringVar(&inter, "i", "7d", "how long interval backup, like 7s/7m/7h/7d")
flag.StringVar(&backupDB, "db", "eiblog", "back up which database")
flag.StringVar(&bucket, "b", "", "qiniu bucket, must")
flag.StringVar(&domain, "d", "", "bucket's domain, must")
flag.StringVar(&accessKey, "ak", "", "qiniu AccessKey, must")
flag.StringVar(&secretKey, "sk", "", "qiniu SecretKey, must")
}
func main() {
flag.Parse()
// days
l := os.Getenv("BACKUP_LONG")
if l != "" {
days, err := strconv.Atoi(l)
if err != nil {
panic(err)
}
long = days
}
// interval
i := os.Getenv("BACKUP_INTERVAL")
if i != "" {
inter = i
}
interval, err = parseDuration(inter)
if err != nil {
log.Panic(err)
}
// db
db := os.Getenv("BACKUP_DB")
if db != "" {
backupDB = db
}
// bucket
b := os.Getenv("QINIU_BUCKET")
if b != "" {
bucket = b
}
if bucket == "" {
log.Panic("which bucket do you want to save?")
}
// domain
d := os.Getenv("QINIU_DOMAIN")
if d != "" {
domain = d
}
if domain == "" {
log.Panic("we need the bucket's domain.")
}
// key
ak := os.Getenv("ACCESS_KEY")
sk := os.Getenv("SECRECT_KEY")
if ak != "" || sk != "" {
accessKey = ak
secretKey = sk
}
if accessKey == "" || secretKey == "" {
log.Panic("we need the accessKey and secretKey")
}
// mongodump
ch := make(chan string)
go mongoDump(ch)
go qiniuUpload(ch)
select {}
}
func mongoDump(ch chan string) {
ips, err := net.LookupIP("mongodb")
if err != nil {
log.Panic(err)
}
log.Println(ips)
if len(ips) == 0 {
log.Panic("not found host: mongodb")
}
t := time.NewTicker(interval)
for {
now := <-t.C
ctx, cancel := context.WithTimeout(context.Background(), time.Minute*20)
defer cancel()
cmd := exec.CommandContext(ctx, "mongodump", "-h", ips[0].String()+":27017", "-d", backupDB, "-o", "/tmp")
err = cmd.Run()
if err != nil {
log.Println("mongodump", err)
continue
}
name := fmt.Sprintf("%s-%s.tar.gz", backupDB, now.Format("2006-01-02"))
cmd = exec.CommandContext(ctx, "tar", "czf", name, "/tmp/"+backupDB)
err = cmd.Run()
if err != nil {
log.Println("tar", err)
continue
}
log.Println("created " + name + " success, uploading to qiniu.")
ch <- name
}
}
func qiniuUpload(ch chan string) {
for key := range ch {
mac := qbox.NewMac(accessKey, secretKey)
putPolicy := &storage.PutPolicy{
Scope: bucket,
Expires: 3600,
InsertOnly: 1,
}
upToken := putPolicy.UploadToken(mac)
cfg := &storage.Config{
Zone: &storage.ZoneHuadong,
UseHTTPS: true,
}
// uploader
uploader := storage.NewFormUploader(cfg)
ret := new(storage.PutRet)
putExtra := &storage.PutExtra{}
err := uploader.PutFile(nil, ret, upToken, key, key, putExtra)
if err != nil {
log.Println(err)
continue
}
log.Printf("uploaded %s success!\n", key)
// delete file
bucketManager := storage.NewBucketManager(mac, cfg)
err = bucketManager.DeleteAfterDays(bucket, key, long)
if err != nil {
log.Println(err)
}
}
}
// parse duration
func parseDuration(d string) (time.Duration, error) {
if len(d) == 0 {
return 0, errors.New("incorrect duration input.")
}
length := len(d)
switch d[length-1] {
case 's', 'm', 'h':
return time.ParseDuration(d)
case 'd':
di, err := strconv.Atoi(d[:length-1])
if err != nil {
return 0, err
}
return time.Duration(di) * time.Hour * 24, nil
}
return 0, errors.New("unsupported duration.")
}