Moby: tmp directory permission changed to rwxr-xr-t after changing the root of the Docker runtime

[chengjingtao]

Description of problem:
I have changed /etc/default/docker/ file in order to set the -g with a place having a lot of free space , but when I run container then I found the permission of tmp directory inside container was drwxr-xr-t (Expected to be drwxrwxrwt ). I cannot write anythings if i was a non root user in container.

root@iZ25rwmaxf8Z:~# sudo docker run -ti -h demo ubuntu:14.04 /bin/bash
root@demo:/# ls -la / | grep tmp
drwxr-xr-t   2 root root 4096 Jan 27 04:03 tmp    

Information:
docker version

root@iZ25rwmaxf8Z:~# docker version
Client:
 Version:      1.8.3
 API version:  1.20
 Go version:   go1.4.2
 Git commit:   f4bf5c7
 Built:        Mon Oct 12 05:37:18 UTC 2015
 OS/Arch:      linux/amd64

Server:
 Version:      1.8.3
 API version:  1.20
 Go version:   go1.4.2
 Git commit:   f4bf5c7
 Built:        Mon Oct 12 05:37:18 UTC 2015
 OS/Arch:      linux/amd64

docker info

root@iZ25rwmaxf8Z:~# docker info
Containers: 39
Images: 410
Storage Driver: aufs
 Root Dir: /data/docker/aufs
 Backing Filesystem: extfs
 Dirs: 492
 Dirperm1 Supported: false
Execution Driver: native-0.2
Logging Driver: json-file
Kernel Version: 3.13.0-32-generic
Operating System: Ubuntu 14.04.2 LTS
CPUs: 2
Total Memory: 3.859 GiB
Name: iZ25rwmaxf8Z
ID: 5RQU:CJY4:53CW:ZQOU:RQ6J:GQZN:UCQQ:WMWL:HHMW:XPJW:YTAR:4M2T
WARNING: No swap limit support
root@iZ25rwmaxf8Z:~# 

uname -a

Linux iZ25rwmaxf8Z 3.13.0-32-generic #57-Ubuntu SMP Tue Jul 15 03:51:08 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

environment details: Elastic Compute Service

Additional info
/dev/xvdb1 was mount on /data

root@iZ25rwmaxf8Z:~# fdisk -l

Disk /dev/xvda: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders, total 41943040 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000da36d

    Device Boot      Start         End      Blocks   Id  System
/dev/xvda1   *        2048    41940991    20969472   83  Linux

Disk /dev/xvdb: 107.4 GB, 107374182400 bytes
240 heads, 16 sectors/track, 54613 cylinders, total 209715200 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x025c8f66

    Device Boot      Start         End      Blocks   Id  System
/dev/xvdb1            2048   209715199   104856576   83  Linux

Actual Results:
permission of tmp directory in container is drwxr-xr-t

Expected Results:
permission of tmp directory in container is drwxrwxrwt

Thank you .

[chengjingtao]

Wow ,Sorry. It was my mistake.

I used the wrong copy command cp -rv /var/lib/docker /data when copying old files to new directory. it lost the write permission.
The right command is

cp -rpv /var/lib/docker /data

I will close the issue.