How to make mounted disks visible to TKL container

[jfontana]

Hi,

After searching for a while, I have figured out how to make a mounted disk visible to the virtual machines (qm).

If I'm not mistaken, what you would do is:


qm set <vmid> --ide1 /dev/sdc2

I have a couple of TKL (TurnKey Linux) containers, though, that I would like to connect to some of the disks that I have mounted. How does one do this? I would really appreciate it if someone could help me.

Josep M.

 

[tom]

AW: How to make mounted disks visible to TKL container

try bind mounts. (search forum)

 

[jfontana]

Re: AW: How to make mounted disks visible to TKL container

Hi Tom,

Thanks very much for your response. I found some information on bind mounts but I'm afraid I'm not able to figure out how to implement this. What I found is the following but it is not clear to me what I have to substitute for the stuff in the claudators. Is there any documentation where this would be explained in some more detail? Is there any reference manual where I could find out for instance what ${DST} is? I imagine ${VE_CONFFILE} is some sort of configuration file but where do I go to find out which file this refers to? Buying the commercial support subscription would be the only way I could have access to some comprehensive documentation? It is fair enough and I can totally understand people working on this project have to support themselves. I'm just an individual, not a company, though, and my usage of Proxmox is stil very limited to justify this commitment. I'm using Proxmox to try to build a home server with different modular components.


CTID=777 cat << EOF > /etc/vz/conf/${CTID}.mount #!/bin/bash . /etc/vz/vz.conf . ${VE_CONFFILE} SRC=/mnt/disk DST=/mnt/disk if [ ! -e ${VE_ROOT}${DST} ]; then mkdir -p ${VE_ROOT}${DST}; fi mount -n -t simfs ${SRC} ${VE_ROOT}${DST} -o ${SRC} EOF chmod +x /etc/vz/conf/${CTID}.mount

If you want read-only mount, add -r option to mount command.

 

[tom]

Re: AW: How to make mounted disks visible to TKL container

search this forum and see http://wiki.openvz.org/Bind_mounts

 

[jfontana]

Re: AW: How to make mounted disks visible to TKL container

Hi again,

I tried to follow the instructions I found on binding mounts but I'm having a very strange problem.

Following the instructions I found here (http://forum.proxmox.com/threads/6265-mount-bind-mounted-harddrive), I was going to create the following file:

/etc/vz/conf/106.mount

I logged in as root just in case anybody wonders but when I try to save the file, I get the following message:

[ Error writing 106.conf: File exists ]

As far as I can tell, though, the file does NOT exist. At least not in that particular directory. Does anybody have any idea as to why this could be happening?

Thanks,

JM

 

[dietmar]

Re: AW: How to make mounted disks visible to TKL container

As far as I can tell, though, the file does NOT exist. At least not in that particular directory.

The file exists on another node in the cluster, or a KVM with that ID already exists.

 

[jfontana]

Re: AW: How to make mounted disks visible to TKL container

OK. Yes. You are right. I found it in:

/etc/qemu-server

Thanks very much.

Now I have 106.conf with the following contents:


ide1: /dev/sdb
ide2: /dev/sdc

These are my two additional hard drives. Just having done this is enough to be able to access them from the VM? Do I have to mount them once inside the VM?
I looked through the forums and I found that you should be able to assign these drives by doing:

$ qm set 106 -ide2 /dev/sdc

When I do this, though, I get an error message saying "unable to change media type". Looking through the forums I see other people got this error message (http://forum.proxmox.com/threads/9451-Adding-Multiple-Physical-Disks-to-VM) but
I see no solution. What am I doing wrong?

JM

 

[dietmar]

Re: AW: How to make mounted disks visible to TKL container

$ qm set 106 -ide2 /dev/sdc

When I do this, though, I get an error message saying "unable to change media type".

Drive ide2 is already configured, but as cdrom? If so, remove it first.

 

[jfontana]

Re: AW: How to make mounted disks visible to TKL container

Thanks Detmar.
I wasn't understanding the syntax of the qm command properly. I thought the -ide# was not the new -ide# I was assigning to the physical drive but the -ide# that had been assigned to the virtual disk of the VM itself. When I did 'qm config 106' I saw the following:

ide2: local:iso/ubuntu-12.04-desktop-amd64.iso,media=cdrom

Since I had installed Ubuntu in that VM I thought that -ide# was the one I had to use with the 'qm set' command. The instructions I had read were not really clear as to what -ide# was. I'm not the only one confused, I saw in the forums that other people had had exactly this problem.

After a bit of trying I noticed that in fact I could choose any number as long as it wasn't -ide2. So I managed to assign two different physical disks by simply assigning one to -ide1 and the other to -ide3, thus skipping -ide2.

JM