br-ent increase backup report error ,when storage with 2 path

[jinyingsunny]

增量备份报错如下：

{"level":"fatal","msg":"upload storage failed incremental upload source to s3://test-qa/BACKUP_2024_02_02_09_39_48/data/1/5/wal failed:rpc error: code = Unknown desc = local path: /usr/local/nebula/data1/storage/nebula/1/5/checkpoints/BACKUP_2024_02_02_09_39_48/wal does not exist,\nincremental upload source to s3://test-qa/BACKUP_2024_02_02_09_39_48/data/1/8/wal failed:rpc error: code = Unknown desc = local path: /usr/local/nebula/data1/storage/nebula/1/8/checkpoints/BACKUP_2024_02_02_09_39_48/wal does not exist,\nincremental upload source to s3://test-qa/BACKUP_2024_02_02_09_39_48/data/1/86/wal

增量备份命令：基于全量备份BACKUP_2024_02_02_09_34_46，做增量备份，且存储到S3

./br-ent-3.7.0-linux-amd64 backup incr --meta "nebulav-metad-0.nebulav-metad-headless.nebula.svc.cluster.local:9559" --base "BACKUP_2024_02_02_09_34_46" --storage "s3://test-qa"  --s3.access_key "minio" --s3.secret_key "minio123" --s3.region "us-west-2" --s3.endpoint "http://192.168.8.202:32000"

storage有两块盘，支持lia两块盘的功能是operator-1.8的新需求，配置如下：

查看gflag运行时：

sh-4.2# curl localhost:19779/flags |grep data_path
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  6996  100  6996    0     0  3829k      0 --:--:-- --:--:-- --:--:-- 6832k
data_path="data/storage,data1/storage"

Your Environments (required)

operator镜像：reg.vesoft-inc.com/cloud-dev/nebula-operator:snap-1.30

nebula-ent-3.5镜像：reg.vesoft-inc.com/rc/nebula-tools-ent:v3.5.0

br-ent：https://github.com/vesoft-inc/br-ent/releases/tag/v3.7.0

How To Reproduce(required)

Steps to reproduce the behavior:

配置storage2块盘，先做全量备份，再做增量备份。

Expected behavior

increase backup success.

[MegaByte875]

#434

[jinyingsunny]

checked by snap-1.35，succeed.