docker build does not preserve xattrs in the generated image #35699
Description
Description
Docker containers do not preserve extended attributes
Steps to reproduce the issue:
- In the build phase, set an extended attribute on a file
- Run the container and check for the existence of said attribute
I pushed a minimal image to the Docker Hub: mterron/xattrs
The Dockerfile for it is inside the image at /Dockerfile so you can build it yourself and reproduce.
Describe the results you received:
Build phase:
# attr -l /path/to/file
Attribute "pax.flags" has a 2 byte value for /path/to/file
Run phase
# attr -l /path/to/file
[empty response]
Describe the results you expected:
When running an image I expect the xattrs to be the same as the ones set during build.
Additional information you deem important (e.g. issue happens only occasionally):
Output of docker version:
Client:
Version: 17.10.0-ce
API version: 1.33
Go version: go1.9.2
Git commit: ba9946cf23
Built: Tue Nov 21 12:38:19 2017
OS/Arch: linux/amd64
Server:
Version: 17.10.0-ce
API version: 1.33 (minimum version 1.12)
Go version: go1.9.2
Git commit: v17.10.0-ce
Built: Tue Nov 21 12:37:42 2017
OS/Arch: linux/amd64
Experimental: false
Output of docker info:
Containers: 4
Running: 3
Paused: 0
Stopped: 1
Images: 47
Server Version: 17.10.0-ce
Storage Driver: overlay2
Backing Filesystem: extfs
Supports d_type: true
Native Overlay Diff: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
Volume: local
Network: bridge host macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file logentries splunk syslog
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 06b9cb35161009dcb7123345749fef02f7cea8e0
runc version: 0351df1c5a66838d0c392b4ac4cf9450de844e2d
init version: 949e6facb77383876aeff8a6944dde66b3089574
Kernel Version: 4.9.65-1-hardened
Operating System: Alpine Linux v3.7
OSType: linux
Architecture: x86_64
CPUs: 2
Total Memory: 3.732GiB
Name: nano
ID:
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Username:
Registry: https://index.docker.io/v1/
Experimental: false
Insecure Registries:
127.0.0.0/8
Live Restore Enabled: true
WARNING: No swap limit support
Additional environment details (AWS, VirtualBox, physical, etc.):
Physical environment