[lxc-users] Setting up containers with multiple logical volumes

[Joshua Schaeffer]

Okay, I think it's all figured out.  I made the change you suggested to 
my test container and it mounted my LV to /mnt successfully in the 
container.  I then took another look at my other container and it looks 
like I had a bad lxc.mount.entry entry (knew it had to be something 
simple). I had:

root at reaver:~# cat /var/lib/lxc/ldap_baneling/config | grep lxc.mount.entry
lxc.mount.entry                     = proc         
/var/lib/lxc/dns_defiler/rootfs/proc         proc     
    nodev,noexec,nosuid    0      0
lxc.mount.entry                     = devpts 
/var/lib/lxc/dns_defiler/rootfs/dev/pts    devptsdefaults00
lxc.mount.entry                     = sysfs 
/var/lib/lxc/dns_defiler/rootfs/syssysfsdefaults0 0
lxc.mount.entry             = /mnt/lxc/ldap/tmp     
/var/lib/lxc/ldap_baneling/rootfs/tmpnonedefaults             00

I'm not sure where I pulled "none" from for the fstype, but when you 
mentioned that you didn't specify that in your config line either it 
made me check mine (mine is xfs not ext4 but the point is the same).  I 
also changed thefile system line to "/dev/vg_lxc1/lv_ldap_tmp1" and 
changed the mount point to just "tmp". Now I have:

lxc.mount.entry                         = proc                           
proc        proc nodev,noexec,nosuid    0    0
lxc.mount.entry                         = devpts                         
dev/pts    devpts defaults        0    0
lxc.mount.entry                         = sysfs                          
sys        sysfs defaults        0    0
lxc.mount.entry                         = /dev/vg_lxc1/lv_ldap_var1      
var        xfs    defaults     0    0
lxc.mount.entry                         = /dev/vg_lxc1/lv_ldap_tmp1      
tmp               xfs defaults        0    0

Everything seems to be working correctly now. Thanks for all your help,
Josh

On 02/17/2014 10:30 PM, Serge Hallyn wrote:
> Quoting Serge Hallyn (serge.hallyn at ubuntu.com):
>> Quoting Joshua Schaeffer (jschaeffer0922 at gmail.com):
>>> Yes it failed to start:
>>>
>>> 1. lxc-create -n testme1 -t debian
>>> 2. root at reaver:~# cat /var/lib/lxc/testme1/config | grep lxc.mount.entry
>>>      lxc.mount.entry = proc proc proc nodev,noexec,nosuid 0 0
>>>      lxc.mount.entry = sysfs sys sysfs defaults  0 0
>>>      lxc.mount.entry = /dev/vg_lxc1/lv_ldap_tmp1 lv_ldap
>>> defaults,create=dir 0 0
>> Wait a sec.  I mistyped.  There's no fstype in there :)
>>
>> That should be
>>
>>      lxc.mount.entry = /dev/vg_lxc1/lv_ldap_tmp1 lv_ldap ext4 defaults,create=dir 0 0
>>
>> or whatever fstype it is in place of ext4.  Sorry.
> Actually I see that will fail too, because 'create=dir' has a
> slight problem.  We need to remove create=dir from the mount
> options which we pass along to the mount syscall.
>
> so for the sake of testing just do
>
>      lxc.mount.entry = /dev/vg_lxc1/lv_ldap_tmp1 mnt ext4 defaults 0 0
>
> -serge

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