[Container-tools] Issue with concurrent docker image pulls

[Lalatendu Mohanty]

On 07/31/2015 07:10 PM, Vincent Batts wrote:
> This race condition is tricky. Unfortunately it's sporadic enough, and 
> IIRC it is only hit when running devicemapper with unsupported 
> loopback files (docker's default for devicemapper). That's been the 
> biggest reason that no one has given this attention.
>

Thanks Vincent. So it seems fixing the vagrant box to use the 
right/recommended storage setup [1] is the way to go forward.

[1] 
https://github.com/LalatenduMohanty/centos7-container-app-vagrant-box/issues/53

> On Thu, Jul 30, 2015 at 7:25 AM, Lalatendu Mohanty 
> <lmohanty at redhat.com <mailto:lmohanty at redhat.com>> wrote:
>
>     Hi,
>
>     Couple of us seeing issue with docker image pulls in the CentOS 7
>     Vagrant box. I spent some time and felt that its a bug in docker
>     1.6.2 and found the issue [1] in docker github repo. It seems the
>     issue is fixed in docker 1.7.1.
>
>     So wanted to throw this information to the list and see if others
>     are also in agreement or have more information about it.
>
>     vagrant at localhost ~]$ docker --version
>     Docker version 1.6.2, build ba1f6c3/1.6.2
>
>     vagrant at localhost ~]$ sudo docker pull centos/httpd
>     latest: Pulling from docker.io/centos/httpd
>     <http://docker.io/centos/httpd>
>     6941bfcbbfca: Pull complete
>     6941bfcbbfca: Download complete
>     41459f052977: Download complete
>     fd44297e2ddb: Error downloading dependent layers
>     06d0d6cc01fc: Download complete
>     1634f53d8d34: Download complete
>     f5d7d1d76e27: Download complete
>     72d3df4bba94: Download complete
>     4617321b355e: Download complete
>     9f74023d48fc: Download complete
>     d3d3700d1c33: Download complete
>     dabbf6687da0: Download complete
>     9c9ec0c21871: Download complete
>     9c9ec0c21871: Error pulling image (latest) from
>     docker.io/centos/httpd <http://docker.io/centos/httpd>, Driver
>     devicemapper failed to create image rootfs
>     fd44297e2ddb050ec4fa9752b7a4e3a8439061991886e2091e7c1f007c906d75:
>     Error running DeviceCreFATA[0109] Error pulling image (latest)
>     from docker.io/centos/httpd <http://docker.io/centos/httpd>,
>     Driver devicemapper failed to create image rootfs
>     fd44297e2ddb050ec4fa9752b7a4e3a8439061991886e2091e7c1f007c906d75:
>     Error running DeviceCreate (createSnapDevice) dm_task_run failed
>
>
>     [1] https://github.com/docker/docker/issues/9718
>
>     Thanks,
>     Lala
>
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