Vagrant mounting /var/lib/docker?

[Joe Brockmeier]

Hey all,

Any Vagrant wizards around? I'd like to figure out how to mount a
directory on my local host as /var/lib/docker for the Atomic Vagrant
boxen - so users don't have to worry about other ways of expanding the
storage to putter around with Atomic and running containers.

Mounting the directory works fine, but I get errors around missing
files/directories when trying to pull a docker image. It may be what I'm
wanting to do is overly complex, but thought I'd see if anybody had
suggestions...

Best,

jzb
-- 
Joe Brockmeier | Project Atomic Doer of Things
jzb(a)redhat.com | http://community.redhat.com/
Twitter: @jzb  | http://dissociatedpress.net/

[Ryan Brown]

On 03/17/2015 11:29 AM, Joe Brockmeier wrote:
>  Hey all,
>  
>  Any Vagrant wizards around? I'd like to figure out how to mount a
>  directory on my local host as /var/lib/docker for the Atomic Vagrant
>  boxen - so users don't have to worry about other ways of expanding the
>  storage to putter around with Atomic and running containers.
>  
>  Mounting the directory works fine, but I get errors around missing
>  files/directories when trying to pull a docker image. It may be what I'm
>  wanting to do is overly complex, but thought I'd see if anybody had
>  suggestions... 
It's likely something to do with how vagrant is mounting the folder.
What provider are you using? The standard `synced_folder` has a couple
different backends (NFS, smb, etc) so it may be specific to certain
providers.

I think the easiest way to punt would be to offer a sparse image (though
what format is a whole other discussion).

-- 
Ryan Brown / Software Engineer, Openstack / Red Hat, Inc.

[Joe Brockmeier]

On 03/17/2015 11:44 AM, Ryan Brown wrote:
> > > 
> > > Any Vagrant wizards around? I'd like to figure out how to mount a
> > > directory on my local host as /var/lib/docker for the Atomic Vagrant
> > > boxen - so users don't have to worry about other ways of expanding the
> > > storage to putter around with Atomic and running containers.
> > > 
> > > Mounting the directory works fine, but I get errors around missing
> > > files/directories when trying to pull a docker image. It may be what I'm
> > > wanting to do is overly complex, but thought I'd see if anybody had
> > > suggestions...
>  It's likely something to do with how vagrant is mounting the folder.
>  What provider are you using? The standard `synced_folder` has a couple
>  different backends (NFS, smb, etc) so it may be specific to certain
>  providers. 
Using rsync.

I'll circle back to this later, but if anybody else has ideas, feel free
to share.

Best,

jzb
-- 
Joe Brockmeier | Project Atomic Doer of Things
jzb(a)redhat.com | http://community.redhat.com/
Twitter: @jzb  | http://dissociatedpress.net/

[Colin Walters]

On Tue, Mar 17, 2015, at 11:29 AM, Joe Brockmeier wrote:
>  Hey all,
>  
>  Any Vagrant wizards around? I'd like to figure out how to mount a
>  directory on my local host as /var/lib/docker for the Atomic Vagrant
>  boxen - so users don't have to worry about other ways of expanding the
>  storage to putter around with Atomic and running containers 
It doesn't really work to sync content into /var/lib/docker behind the
daemon's back.

Running a local caching registry is one option (say on a "master" box,
and configuring nodes to pull from it it).  That saves you download
time, but not storage.

It would also be possible to use something like Ceph/Gluster to
store images between VMs (patches for Docker exist), but then you
lose the LVM copy-on-write.  Overlayfs would solve this
by allowing per-node writes to stay in the machine's storage pool,
while drawing read-only data from elsewhere.