https://bugzilla.redhat.com/show_bug.cgi?id=1192567



--- Comment #2 from Lokesh Mandvekar <[email protected]> ---
(In reply to venkat from comment #0)

> Any Dockerfile can be used to reproduce issue.
> 
> FROM ubuntu
> 
> # Install vnc, xvfb in order to create a 'fake' display and firefox
> RUN ls
> EXPOSE 5900
> CMD    ["uname"]
> 
> 
> Steps to Reproduce:
> 1. Install docker-io as mentioned above
> 2. use above dockerfile or any then run docker build -t "sample" --rm=true .
> 3. 90% it hangs node, session will be lost. 
> 

Could you check if docker-io-1.5.0-1 takes care of this? Certainly works for me
as did 1.4.1-3. 1.5.0-1 is in epel6-testing. If not, please read on..

'any Dockerfile' sounds too vague a term. Could you let me know if your
Dockerfile above is complete? The comment up there sounds like there's an
'apt-get install...' step needed.

Going by the above comment, here's the Dockerfile I assume you'd want to use
(correct me if I'm wrong):
---Dockerfile---
FROM ubuntu
RUN apt-get update
RUN apt-get -y install firefox xvfb vnc4server
RUN ls
EXPOSE 5900
CMD ["uname"]
---Dockerfile---

and docker build with this Dockerfile gives me:
(uses cache to keep output short)
$ sudo docker build .
Sending build context to Docker daemon 2.048 kB
Sending build context to Docker daemon 
Step 0 : FROM ubuntu
 ---> 5ba9dab47459
Step 1 : RUN apt-get update
 ---> Using cache
 ---> ed6085e22647
Step 2 : RUN apt-get -y install firefox xvfb vnc4server
 ---> Using cache
 ---> 207570c0e1ff
Step 3 : RUN ls
 ---> Using cache
 ---> 725817d5b510
Step 4 : EXPOSE 5900
 ---> Using cache
 ---> 31456f34ce1d
Step 5 : CMD uname
 ---> Using cache
 ---> 8d73b2b5a45e
Successfully built 8d73b2b5a45e



My distro and package versions:

$ rpm -q docker-io device-mapper
docker-io-1.5.0-1.el6.x86_64
device-mapper-1.02.90-2.el6_6.1.x86_64

$ cat /etc/centos-release 
CentOS release 6.6 (Final)

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