Re: [lxc-users] Mounts in shared folder not seen in container

[Bertrand NOEL]

Thanks it's working! I had tried rbind but in the command line. I did
not know it was possible to have it in the config.

I will go ask on Libvirt mailing list, because I was trying to get
that using libvirt-lxc, and there does not seem to exist an equivalent
option.


2015-10-05 17:11 GMT+02:00 Serge Hallyn :
> Quoting Bertrand NOEL (bertrand.noel...@gmail.com):
>> Hi,
>> I share a folder from host to container. That folder contains mounts.
>> Below is a simple usecase of what I do.
>>
>> # On host
>> mkdir -p /shared/mount1
>> mount some.iso /shared/mount1
>>
>> # In the config of my container
>> lxc.mount.entry = /shared shared none bind 0 0
>>
>> # On the host
>> tree /shared
>> /shared/
>>  └── mount1
>>   └── file
>>
>> # On the container
>> tree /shared
>> /shared/
>>  └── mount1
>>
>> I do see the folder and the subfolders, but not the contents of the mounts.
>> Is it expected behaviour? How can I share a folder containing mounts?
>>
>> If I share the mount directly, and not its containing folder
>> (lxc.mount.entry = /shared/mount1 shared/mount1 none bind 0 0), it
>> works - I can see the files.
>> But I have lots of mount points, and they could change.
>>
>> I have read that webpage [1] and discussions on this mailing list [2]
>> about sharing mounts. It works, but only for mounts mounted *after*
>> the container has started.
>
> You want rbind (recursive bind), just bind is only the mount itself.
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[lxc-users] Mounts in shared folder not seen in container

[Bertrand NOEL]

Hi,
I share a folder from host to container. That folder contains mounts.
Below is a simple usecase of what I do.

# On host
mkdir -p /shared/mount1
mount some.iso /shared/mount1

# In the config of my container
lxc.mount.entry = /shared shared none bind 0 0

# On the host
tree /shared
/shared/
 └── mount1
  └── file

# On the container
tree /shared
/shared/
 └── mount1

I do see the folder and the subfolders, but not the contents of the mounts.
Is it expected behaviour? How can I share a folder containing mounts?

If I share the mount directly, and not its containing folder
(lxc.mount.entry = /shared/mount1 shared/mount1 none bind 0 0), it
works - I can see the files.
But I have lots of mount points, and they could change.

I have read that webpage [1] and discussions on this mailing list [2]
about sharing mounts. It works, but only for mounts mounted *after*
the container has started.

System is Ubuntu 14.04.3, with LXC 1.0.7

[1] https://s3hh.wordpress.com/2011/09/22/sharing-mounts-with-a-container/
[2] 
https://lists.linuxcontainers.org/pipermail/lxc-users/2014-February/006168.html
[2] https://lists.linuxcontainers.org/pipermail/lxc-users/2014-March/006337.html
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Re: [lxc-users] Mounts in shared folder not seen in container

[Serge Hallyn]

Quoting Bertrand NOEL (bertrand.noel...@gmail.com):
> Hi,
> I share a folder from host to container. That folder contains mounts.
> Below is a simple usecase of what I do.
> 
> # On host
> mkdir -p /shared/mount1
> mount some.iso /shared/mount1
> 
> # In the config of my container
> lxc.mount.entry = /shared shared none bind 0 0
> 
> # On the host
> tree /shared
> /shared/
>  └── mount1
>   └── file
> 
> # On the container
> tree /shared
> /shared/
>  └── mount1
> 
> I do see the folder and the subfolders, but not the contents of the mounts.
> Is it expected behaviour? How can I share a folder containing mounts?
> 
> If I share the mount directly, and not its containing folder
> (lxc.mount.entry = /shared/mount1 shared/mount1 none bind 0 0), it
> works - I can see the files.
> But I have lots of mount points, and they could change.
> 
> I have read that webpage [1] and discussions on this mailing list [2]
> about sharing mounts. It works, but only for mounts mounted *after*
> the container has started.

You want rbind (recursive bind), just bind is only the mount itself.
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