[one-users] Save As and Detach option
Ruben S. Montero
rsmontero at opennebula.org
Tue Nov 27 04:58:19 PST 2012
Hi,
Just to add a few considerations:
1.- Save_as images are not created on the datastore, just an ID is
generated as a placeholder for the new image (this is the fstype: save_as).
So, it is normal that no image (actual path) is created after a save_as
operation, and the state is supposed to be locked (waiting for the real
image) as reported. I do not see any issue here.
2.- The save_as image is moved to the final destination when the VM is
shutdown, shutdown means onevm shutdown (delete or stop will not move the
image, for example). Could you send the output vm.log of the image after
the shutdown. You should look for messages about a MVDS command.
Cheers
Ruben
On Tue, Nov 27, 2012 at 12:41 PM, Roberto Rosende Dopazo
<rrosende at cesga.es>wrote:
> Hi,
>
> El 27/11/12 11:50, Javier Fontan escribió:
>
> Hi,
>>
>> I'm struggling to understand the situation you are describing. Correct
>> me if I am wrong.
>>
>> You mention dom0. Are you using Xen? If that is true disregard what I
>> said about changing dynamic_ownership parameter in libvirt as Xen
>> drivers do not use libvirt for hypervisor communication.
>>
> It's kvm image and dynamic_ownership was wrong because I misunderstood and
> put it to 1, now is 0 and owner and group is not changed.
> But option save as still doesn't work, I tried it directly from frontend
> shell instead SunStone and I got that:
>
>
> [grid at cloud ~]$ onevm show 138
> VIRTUAL MACHINE 138 INFORMATION
> ID : 138
> NAME : one-138
> USER : emi
> GROUP : oneadmin
> STATE : ACTIVE
> LCM_STATE : RUNNING
> RESCHED : No
> HOST : nubacesga-01-4
> START TIME : 11/27 11:34:32
> END TIME : -
> DEPLOY ID : one-138
>
> VIRTUAL MACHINE MONITORING
> USED MEMORY : 0K
> NET_RX : 0K
> USED CPU : 0
> NET_TX : 0K
>
> PERMISSIONS
> OWNER : um-
> GROUP : ---
> OTHER : ---
>
> VIRTUAL MACHINE TEMPLATE
> CPU="1"
> DISK=[
> BUS="virtio",
> CLONE="YES",
> CLUSTER_ID="100",
> DATASTORE="GRID EMC",
> DATASTORE_ID="100",
> DEV_PREFIX="hd",
> DISK_ID="0",
> DRIVER="qcow2",
> IMAGE="GRID SL6_emi_cream_orig",
> IMAGE_ID="11",
> READONLY="NO",
> SAVE="NO",
> SOURCE="/var/lib/one/**datastores/100/**3dfef6d01e7e624f13ef13698ed047**
> 10",
> TARGET="hda",
> TM_MAD="shared",
> TYPE="FILE" ]
> DISK=[
> DEV_PREFIX="hd",
> DISK_ID="1",
> SIZE="1024",
> TARGET="hdb",
> TYPE="swap" ]
> GRAPHICS=[
> KEYMAP="es",
> LISTEN="0.0.0.0",
> PORT="6038",
> TYPE="vnc" ]
> MEMORY="2512"
> NAME="one-138"
> NIC=[
> BRIDGE="virbrPUBLIC",
> CLUSTER_ID="100",
> IP="193.144.35.36",
> MAC="02:00:c1:90:23:24",
> MODEL="e1000",
> NETWORK="red-193.144.35",
> NETWORK_ID="0",
> VLAN="NO" ]
> OS=[
> ROOT="hda1" ]
> PRODUCT="EMI-test"
> REQUIREMENTS="CLUSTER_ID = 100"
> TEMPLATE_ID="6"
> VCPU="1"
> VMID="138"
>
> VIRTUAL MACHINE HISTORY
> SEQ HOST REASON START TIME PROLOG_TIME
> 0 nubacesga-01-4 none 11/27 11:34:56 0d 00h01m09s 0d 00h00m22s
>
>
>
>
> [grid at cloud ~]$ onevm saveas 138 0 changes01
> Image ID: 31
>
>
>
> [grid at cloud ~]$ oneimage list
> ID USER GROUP NAME DATASTORE SIZE TYPE PER STAT RVMS
> [...]
> 31 grid oneadmin changes01 GRID EMC 2.2G OS No lock 0
>
>
> [grid at cloud ~]$ oneimage show 31
> IMAGE 31 INFORMATION
> ID : 31
> NAME : changes01
> USER : grid
> GROUP : oneadmin
> DATASTORE : GRID EMC
> TYPE : OS
> REGISTER TIME : 11/27 11:36:26
> PERSISTENT : No
> SOURCE : /var/lib/one/datastores/100/**
> 08cee146d8bff43c6c61794f1ba947**d3
> FSTYPE : save_as
> SIZE : 2.2G
> STATE : lock
> RUNNING_VMS : 0
>
> PERMISSIONS
> OWNER : um-
> GROUP : ---
> OTHER : ---
>
> IMAGE TEMPLATE
> DEV_PREFIX="hd"
> SAVED_DISK_ID="0"
> SAVED_IMAGE_ID="11"
> SAVED_VM_ID="138"
> SAVE_AS="YES"
>
>
>
> From onevm help I understood that now it's supposed I have the file :
>
> saveas <vmid> <diskid> <img_name>
> Sets the specified VM disk to be saved in a new Image. The Image is
> created immediately, but the contents are saved only if the VM is
> shut down gracefully (i.e., using 'onevm shutdown' and not
> 'onevm delete')
>
>
> But it does not exist:
> [grid at cloud ~]$ file /var/lib/one/datastores/100/**
> 08cee146d8bff43c6c61794f1ba947**d3
> /var/lib/one/datastores/100/**08cee146d8bff43c6c61794f1ba947**d3: cannot
> open `/var/lib/one/datastores/100/**08cee146d8bff43c6c61794f1ba947**d3'
> (No such file or directory)
>
> After a shutdown file still does not exist but image is marked as READY
>
> [grid at cloud ~]$ oneimage list
> ID USER GROUP NAME DATASTORE SIZE TYPE PER STAT RVMS
> [...]
> 31 grid oneadmin changes01 GRID EMC 2.2G OS No rdy 0
>
>
> And file doesn't exists anyway, from oned.log
> 492501-Tue Nov 27 11:36:26 2012 [ReM][D]: Req:5808 UID:0 AclInfo invoked
> 492502-Tue Nov 27 11:36:26 2012 [ReM][D]: Req:5808 UID:0 AclInfo result
> SUCCESS, "<ACL_POOL><ACL><ID>0..."
> 492503-Tue Nov 27 11:36:26 2012 [ReM][D]: Req:4608 UID:2
> VirtualMachineSaveDisk invoked, 138, 0, "changes01", ""
> 492504-Tue Nov 27 11:36:26 2012 [ImM][I]: Creating disk at of 2216Mb
> (type: save_as)
> 492505-Tue Nov 27 11:36:26 2012 [ReM][D]: Req:4608 UID:2
> VirtualMachineSaveDisk result SUCCESS, 31
> 492506-Tue Nov 27 11:36:26 2012 [ImG][D]: Message received: LOG I 31
> ExitCode: 0
> 492507-
> 492508-Tue Nov 27 11:36:26 2012 [ImM][I]: ExitCode: 0
> 492509:Tue Nov 27 11:36:26 2012 [ImG][D]: Message received: MKFS SUCCESS
> 31 /var/lib/one/datastores/100/**08cee146d8bff43c6c61794f1ba947**d3
> 492510-
>
>
> Cheers,
> Roberto
>
>
>
>
> First line I see in the in the log file seems seriously broken:
>>
>> 426622-Mon Nov 26 14:06:42 2012 [ImM][I]: Creating disk at of 2216Mb
>> (type: save_as)
>>
>> It's not saying where it is creating the image (source in OpenNebula
>> parlance) and give an strange type. Could you please send us the VM
>> and Image templates from onevm and oneimage show? Maybe I am missing
>> something and other developers could help me here.
>>
>> I also see this line that says the image was created:
>>
>> 426627:Mon Nov 26 14:06:42 2012 [ImG][D]: Message received: MKFS
>> SUCCESS 25 /var/lib/one/datastores/100/**a3e076f377a855dc76f44ac373c9b0**
>> ca
>>
>> But you are telling me that the image does not exist. Are you checking
>> the hypervisor node or the frontend?
>>
>> More comments inline
>>
>>
>> On Mon, Nov 26, 2012 at 2:33 PM, Roberto Rosende Dopazo
>> <rrosende at cesga.es> wrote:
>>
>>> [...]
>>> After delete machine image state is showed as READY in Sunstone.
>>> In dom0 deployment dir and file are still present and disk files disk.0
>>> and
>>> disk.1 have their user and group changed to root.root and image file
>>> doesn't
>>> exist
>>> A new file appears
>>> # file /var/lib/one/datastores/0/123/**checkpoint
>>> /var/lib/one/datastores/0/123/**checkpoint: data
>>>
>> This is really strange. After EPILOG (the state that comes after
>> successful shutdown, delete or cancel) the VM directory in the system
>> datastore is deleted, so those files should not be there. Also, then
>> only way OpeNebula tells Xen to create checkpoint is on SAVE, STOP or
>> MIGRATE. Are you sure that you have deleted the VM? It looks to me
>> that the image was suspended or stopped. Bear in mind that save_as is
>> not done in that state.
>>
>> Also with root.root but 666 file permission and in this case directory
>>> and
>>> files of this machine are never deleted from running datastore
>>>
>> The non deletion of images is consistent my the SAVE/STOP theory.
>>
>> Cheers
>>
>> --
>> Javier Fontán Muiños
>> Project Engineer
>> OpenNebula - The Open Source Toolkit for Data Center Virtualization
>> www.OpenNebula.org | jfontan at opennebula.org | @OpenNebula
>>
>
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>
--
Ruben S. Montero, PhD
Project co-Lead and Chief Architect
OpenNebula - The Open Source Solution for Data Center Virtualization
www.OpenNebula.org | rsmontero at opennebula.org | @OpenNebula
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