Re: [HTCondor-users] mount points in docker universe

[Matthias Schnepf <udcqn@xxxxxxxxxxxxxxx>]

On 02/25/2016 06:19 PM, Todd Tannenbaum wrote:
> On 2/25/2016 8:59 AM, Matthias Schnepf wrote:
> > Hello,
> >
> > I want to mount some directories in my docker container (running as
> > Docker universe). It works fine when the path on the host and inside the
> > container are the same.
> >
> > Is there a method to change the mount point inside the container?
> > e.g.:on host: /mnt/storage/ inside docker: /storage/
> >
> > Thanks
> >
> > Matthias
>
> Hi Matthias,
>
> Yes, if I recall correctly HTCondor can change the mount point inside 
> the container.
>
> To implement your example above (e.g.:on host: /mnt/storage/ inside 
> docker: /storage/), I think you could append something like the 
> following in condor_config.local :
>
> DOCKER_VOLUMES = $(DOCKER_VOLUMES) STORAGE
> DOCKER_MOUNT_VOLUMES = $(DOCKER_MOUNT_VOLUMES) STORAGE
> DOCKER_VOLUME_DIR_STORAGE = /mnt/storage:/storage
>
> Warning: the above config is off the top of my head, I didn't 
> personally test it....
>
> The key is the ability to use a colon in DOCKER_VOLUME_DIR_xxxx knob 
> to specify both host and container mount points.
> See details from the development ticket for this feature at:
>   https://htcondor-wiki.cs.wisc.edu/index.cgi/tktview?tn=5308
>
> It looks to me like the HTCondor Manual documentation on this feature 
> is not yet 100% complete; for instance I didn't see it mention the 
> ability to have different host and container mount points.  We will 
> make a documentation ticket to correct this for future releases of the 
> HTCondor Manual.
>
> Hope the above helps.
>
> Todd

Hi Todd,

I tested it with

DOCKER_VOLUMES = STORAGE
DOCKER_MOUNT_VOLUMES = STORAGE
DOCKER_VOLUME_DIR_STORAGE = /mnt/storage:/storage

and it works fine.

Thanks a lot

Matthias