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

[Joshua Schaeffer]

I'm trying to figure out how to create an LXC using multiple LVM logical 
volumes.  I'd like to dohave the root filesystem of the LXC on its own 
LV, the /var directory of the LXC on its own LV, and the /tmp directory 
of the LXC on its own LV. Here is what I've done sofaron the host:

=====================================
root at reaver:~# vgdisplay vg_lxc1
   --- Volume group ---
   VG Name               vg_lxc1
   System ID
   Format                lvm2
   Metadata Areas        1
   Metadata Sequence No  21
   VG Access             read/write
   VG Status             resizable
   MAX LV                0
   Cur LV                4
   Open LV               3
   Max PV                0
   Cur PV                1
   Act PV                1
   VG Size               261.70 GiB
   PE Size               4.00 MiB
   Total PE              66994
   Alloc PE / Size       11264 / 44.00 GiB
   Free  PE / Size       55730 / 217.70 GiB
   VG UUID Zb2ume-1Ty9-s8Ze-NEZc-7Vee-A3h7-A2IvGd
=====================================

=====================================
root at reaver:~# lvdisplay vg_lxc1
   --- Logical volume ---
   LV Path /dev/vg_lxc1/lv_ldap_var1
   LV Name                lv_ldap_var1
   VG Name                vg_lxc1
   LV UUID VfCZgf-ZOGA-lJgn-GFO8-fOAd-IMzl-QF32aY
   LV Write Access        read/write
   LV Creation host, time reaver, 2013-11-30 13:46:11 -0700
   LV Status              available
   # open                 1
   LV Size                10.00 GiB
   Current LE             2560
   Segments               1
   Allocation             inherit
   Read ahead sectors     auto
   - currently set to     256
   Block device           254:3

   --- Logical volume ---
   LV Path /dev/vg_lxc1/lv_ldap_tmp1
   LV Name                lv_ldap_tmp1
   VG Name                vg_lxc1
   LV UUID GDru3y-oLJB-Iv06-tjv3-wHuq-p8Fi-xBUscf
   LV Write Access        read/write
   LV Creation host, time reaver, 2013-11-30 13:46:16 -0700
   LV Status              available
   # open                 1
   LV Size                4.00 GiB
   Current LE             1024
   Segments               1
   Allocation             inherit
   Read ahead sectors     auto
   - currently set to     256
   Block device           254:4

   --- Logical volume ---
   LV Path /dev/vg_lxc1/lv_ldap_root1
   LV Name                lv_ldap_root1
   VG Name                vg_lxc1
   LV UUID u1tAUH-t7CB-tEdp-M84c-H93p-9CEn-7xXzAM
   LV Write Access        read/write
   LV Creation host, time reaver, 2014-02-10 20:19:30 -0700
   LV Status              available
   # open                 1
   LV Size                10.00 GiB
   Current LE             2560
   Segments               1
   Allocation             inherit
   Read ahead sectors     auto
   - currently set to     256
   Block device           254:2
=====================================

I manually created the LV's that I would use for /tmp (lv_ldap_tmp1) and 
/var (lv_ldap_var1), but the LV for the rootfs (lv_ldap_root1) I created 
using the lxc-create command:

=====================================
lxc-create -n ldap_baneling -t debian -B lvm --vgname vg_lxc1 --lvname 
lv_ldap_root1 --fstype xfs --fssize 10G
=====================================

This seems to work correctly for the rootfs, but I can't seem to get the 
container to use the /var and /tmp LV's.  This is what I've changed in 
my container's config file:

=====================================
lxc.mount.entry    = /var/lib/lxc/ldap_baneling/rootfs/var 
/var/lib/lxc/ldap_baneling/rootfs/var    none    bind    0    0
lxc.mount.entry    = /var/lib/lxc/ldap_baneling/rootfs/tmp 
/var/lib/lxc/ldap_baneling/rootfs/tmp    none    bind    0    0
=====================================

I've mounted the LV's under their respective directories. However, when 
I run df /var or df /tmp under the container it appears that that those 
directories are still mounted under the rootfs.  Am I just going about 
this incorrectly?  Any direction would be appreciated.

Thanks,
Josh
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.linuxcontainers.org/pipermail/lxc-users/attachments/20140211/547feb13/attachment.html>