On 06/09/2021 11:33 am, Paco Xu wrote:
Hi,
I am not quite familiar with the bug report process of `DF` or os.
The Problem
- DF shows incorrect disk usage which include disk usage of a mounted path
The Scenario
We run a registry with docker and the data dir is mounted from NFS or local
disk. The docker is using device-mapper.
DF result & du result
When registry is busy pulling images, there is no big files in registry
container, but the `df -h` shows 7.8 G as below(Sometime 9G the below
screenshot 8.5G)
```
[root@10-23-15-8 ~]# df -h | grep
/var/lib/docker/devicemapper/mnt/a0ba326c248009e14e9650c84818fdb45af904338bdc90e7d786a584f63ed47e
/dev/dm-10 10G 7.8G 2.3G 78%
/var/lib/docker/devicemapper/mnt/a0ba326c248009e14e9650c84818fdb45af904338bdc90e7d786a584f63ed47e
```
The /var/lib/registry/docker is mounted
```
{
"Type": "bind",
"Source": "/var/local/dce/registry",
"Destination": "/var/lib/registry",
"Mode": "rw",
"RW": true,
"Propagation": "rprivate"
}
```
[文本 描述已自动生成]
And at the time, I run `du`.
```
[root@10-23-15-8 ~]# du -h
/var/lib/docker/devicemapper/mnt/a0ba326c248009e14e9650c84818fdb45af904338bdc90e7d786a584f63ed47e
| tail -n 1
478M
/var/lib/docker/devicemapper/mnt/a0ba326c248009e14e9650c84818fdb45af904338bdc90e7d786a584f63ed47e
```
The du details shows that `df -h` is not correct.
The expected behavior
When it became normal, the disk usage is about 400~500M.
```
[root@10-23-15-8 ~]# df -h | grep
/var/lib/docker/devicemapper/mnt/a0ba326c248009e14e9650c84818fdb45af904338bdc90e7d786a584f63ed47e
/dev/dm-10 10G 478M 9.5G 6%
/var/lib/docker/devicemapper/mnt/a0ba326c248009e14e9650c84818fdb45af904338bdc90e7d786a584f63ed47e
```
No matter what happened, the `df -h` should not take `mounted path
./var/lib/registry/docker` into account.
Further Information
I searched in stackoverflow and other place and only find some issues about `df
and du show different` problem. I am not sure which is my case. Thanks.
Best regards,
Paco
________________________________
本邮件及附件含 DaoCloud
保密信息，仅限发送给上面地址中列出的个人或群组，禁止任何其他人以任何形式使用本邮件中的信息。若误收本邮件，请务必通知发送人并直接删去，不得使用、传播或复制本邮件。
du -hx perhaps?
--
Chris Elvidge
5 Ebor Park, Appleton Roebuck, York. YO23 7DZ.
Tel (Mob): +447443472958 mailto:celvi...@outlook.com
Calle Padre Raimundo Codesal 1, Vélez-Málaga, 29700, España
