Re: [ovirt-devel] Snapshots & clone support from datastore

[Deepak Jagtap]

Thanks Allon!


Best Regards,

Deepak


From: Allon Mureinik 
Sent: Tuesday, June 6, 2017 2:43:17 PM
To: Deepak Jagtap
Cc: devel@ovirt.org
Subject: Re: [ovirt-devel] Snapshots & clone support from datastore

Unfortunately, there's no such integration point at the moment.

On Tue, Jun 6, 2017 at 5:57 AM, Deepak Jagtap 
> wrote:

Hey Guys,


I am newbie to ovirt, and wanted to confirm whats the best way to leverage 
snapshot, clone features

provided by the datastore filesystem.

I have a btrfs datastore exported and wanted use btrfs snapshots for vm 
snapshot & clones.

Does ovirt offers any hooks/APIs so that image snapshots are created by the 
filesystem?


Thanks & Regards,

Deepak



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Re: [ovirt-devel] Snapshots & clone support from datastore

[Allon Mureinik]

Unfortunately, there's no such integration point at the moment.

On Tue, Jun 6, 2017 at 5:57 AM, Deepak Jagtap 
wrote:

> Hey Guys,
>
>
> I am newbie to ovirt, and wanted to confirm whats the best way to leverage
> snapshot, clone features
>
> provided by the datastore filesystem.
>
> I have a btrfs datastore exported and wanted use btrfs snapshots for vm
> snapshot & clones.
>
> Does ovirt offers any hooks/APIs so that image snapshots are created by
> the filesystem?
>
>
> Thanks & Regards,
>
> Deepak
>
>
>
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Re: [ovirt-devel] [ovirt-system-tests] ssh to an oVirt VM in Lago

[Yaniv Kaul]

On Tue, Jun 6, 2017 at 11:26 AM, Milan Zamazal  wrote:

> Valentina Makarova  writes:
>
> > I may use a pakamiko only like this :
> > https://github.com/vmakarova/ovirt-system-tests/commit/
> > 3e9e5ce697da7e0567aaad8397fa886469bc5ae3
> > Lago also use pakamiko, so there is not new dependencies.
> >
> > Is this a good way?
>
> If we don't have higher level means to access VMs via ssh in
> Lago/Ovirt-System-Tests (do we?) then I'd say using paramiko is fine.
>
> > And few more questions about tests and ovirt network.
> >
> > 1) This address of vm0 192.168.201.213. What is this addres? Why it is
> > ip of 'vm0'?  What gave it to vm0 and how the user may to understand
> > that the address would be that?  There is not this ip in virsh
> > net-list and net-dumpxml
>
> It's probably obtained from DHCP, it's in the DHCP range specified in
> LagoInitFile (*.100-*.254).
>
> > 2) In test vm_run (004_basic_sanity) we configure interface eth0 on
> > vm0 with ip 192.168.200.200.  But this interface is unreacheble from
> > engine-host.And when I ask vm0 'ip address' via ssh, there is not
> > interface eth1 there. What for does test add it, if it does not work?
> > Should it work?  And why test finished successful if eth0 was not
> > configured according a start_params?
>
> Good questions.  The complex setup in vm_run looks somewhat mysterious.
> But we should be able to use the Yaniv's suggestion:
>
> > 2017-05-31 23:06 GMT+03:00 Yaniv Kaul :
>
> [...]
>
> >> We can add a fake entry in Lago init file just as we do for
> hosted-engine.
> >> Most importantly, it'll create a MAC to IP address mapping in libvirt's
> >> DHCP.
> >> Of course, then we need to use this MAC.
>
> If I understand it correctly:
>
> - We can create a fake VM in LagoInitFile.  How do we specify it's fake,
>   is it the vm-provider entry?
>

Not sure, but here's the example of hosted-engine VM:
  __ENGINE__:
vm-provider: ssh
vm-type: ovirt-engine
distro: el7
service_provider: systemd
ssh-password: 123456
nics:
  - net: __LAGO_NET__
ip: 192.168.200.99
metadata:
  ovirt-engine-password: 123



>
> - If we assign IP to that VM, the mapping for DHCP is automatically
>   created, and the MAC address is determined by lago.utils.ipv4_to_mac.
>

Or use static IP mapping - see above.


>
> - Then we can specify `nics' parameter to params.VM constructor or to
>   add a NIC to the VM as in add_nic test (but I'm not sure sshd would be
>   available on it in that case).
>

I'd hope so...
Y.


>
> Thanks,
> Milan
>
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Re: [ovirt-devel] [ovirt-system-tests] ssh to an oVirt VM in Lago

[Milan Zamazal]

Valentina Makarova  writes:

> I may use a pakamiko only like this :
> https://github.com/vmakarova/ovirt-system-tests/commit/
> 3e9e5ce697da7e0567aaad8397fa886469bc5ae3
> Lago also use pakamiko, so there is not new dependencies.
>
> Is this a good way?

If we don't have higher level means to access VMs via ssh in
Lago/Ovirt-System-Tests (do we?) then I'd say using paramiko is fine.

> And few more questions about tests and ovirt network.
>
> 1) This address of vm0 192.168.201.213. What is this addres? Why it is
> ip of 'vm0'?  What gave it to vm0 and how the user may to understand
> that the address would be that?  There is not this ip in virsh
> net-list and net-dumpxml

It's probably obtained from DHCP, it's in the DHCP range specified in
LagoInitFile (*.100-*.254).

> 2) In test vm_run (004_basic_sanity) we configure interface eth0 on
> vm0 with ip 192.168.200.200.  But this interface is unreacheble from
> engine-host.And when I ask vm0 'ip address' via ssh, there is not
> interface eth1 there. What for does test add it, if it does not work?
> Should it work?  And why test finished successful if eth0 was not
> configured according a start_params?

Good questions.  The complex setup in vm_run looks somewhat mysterious.
But we should be able to use the Yaniv's suggestion:

> 2017-05-31 23:06 GMT+03:00 Yaniv Kaul :

[...]

>> We can add a fake entry in Lago init file just as we do for hosted-engine.
>> Most importantly, it'll create a MAC to IP address mapping in libvirt's
>> DHCP.
>> Of course, then we need to use this MAC.

If I understand it correctly:

- We can create a fake VM in LagoInitFile.  How do we specify it's fake,
  is it the vm-provider entry?

- If we assign IP to that VM, the mapping for DHCP is automatically
  created, and the MAC address is determined by lago.utils.ipv4_to_mac.

- Then we can specify `nics' parameter to params.VM constructor or to
  add a NIC to the VM as in add_nic test (but I'm not sure sshd would be
  available on it in that case).

Thanks,
Milan
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[ovirt-devel] Snapshots & clone support from datastore

[Deepak Jagtap]

Hey Guys,


I am newbie to ovirt, and wanted to confirm whats the best way to leverage 
snapshot, clone features

provided by the datastore filesystem.

I have a btrfs datastore exported and wanted use btrfs snapshots for vm 
snapshot & clones.

Does ovirt offers any hooks/APIs so that image snapshots are created by the 
filesystem?


Thanks & Regards,

Deepak


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Re: [ovirt-devel] [ovirt-system-tests] ssh to an oVirt VM in Lago

[Valentina Makarova]

Thank you all for your advice!

Now I can ping 192.168.201.213 succesfully, I can get SPICE-connection.
And I want to know your opinion about way to get connection via some test.

I may use a pakamiko only like this :
https://github.com/vmakarova/ovirt-system-tests/commit/
3e9e5ce697da7e0567aaad8397fa886469bc5ae3
Lago also use pakamiko, so there is not new dependencies.

Is this a good way?

Or, may something using lago be better?
For example using lago.ssh.get_ssh_client() as a wrapper like this:
https://github.com/vmakarova/ovirt-system-tests/commit/
855dbdf379730d55daf51851052d71daa45d9a09

Or Is there better way to do this?


And few more questions about tests and ovirt network.

1) This address of vm0 192.168.201.213. What is this addres? Why it is ip
of 'vm0'?
What gave it to vm0 and how the user may to understand that the address
would be that?
There is not this ip in  virsh net-list  and net-dumpxml

2) In test vm_run (004_basic_sanity) we configure interface eth0 on vm0
with ip 192.168.200.200.
But this interface is unreacheble from engine-host.And when I ask vm0 'ip
address' via ssh,
there is not interface eth1 there. What for does test add it, if it does
not work? Should it work?
And why test finished successful if eth0 was not configured according a
start_params?


Sincerely,
Valentina Makarova

2017-05-31 23:06 GMT+03:00 Yaniv Kaul :

>
>
> On Wed, May 31, 2017 at 11:10 AM, Milan Zamazal 
> wrote:
>
>> Nadav Goldin  writes:
>>
>> > I would start first by making sure the VM is booting properly using
>> > SPICE from the GUI, when the tests ends, you should be able to log
>> > into the Engine GUI(run 'lago ovirt status' inside your deployment
>> > directory to get the link, the directory should be something like
>> > ovirt-system-tests/deployment-SUITE-NAME). Then in the GUI, start the
>> > VM and click on 'console', the username/password should be
>> > root/123456.
>>
>> It's actually "cirros"/"cubswin:)".
>>
>> > If it is booting properly - first would be to check if it even gets an
>> > IP(my guess is not - I'm not even sure if dhcp is running in that
>> > layer, maybe we should setup one..).
>>
>> Yes, it should get everything, it's possible to log in there via ssh on
>> my setup.
>>
>> Valentina Makarova  writes:
>>
>> > And a second question is about ssh to this vm connection from my
>> laptop's
>> > console.
>> > According run_vm test from  004_basic_sanity.py (
>> > https://github.com/oVirt/ovirt-system-tests/blob/master/
>> basic-suite-master/test-scenarios/004_basic_sanity.py#L385
>> > ) vm0 should contain interface with ip 192.168.200.200, but ping this
>> from
>> > engine (192.168.200.4) Destination Host Unreachable. And 'ping vm0'
>> defined
>> > vm0 as 192.168.201.213 and also couldn't reach vm0.
>>
>> 192.168.201.213 should be working, I can both ping and ssh the
>> corresponding IP on my computer.  Do you run Lago directly on your
>> computer or in a VM?  If you run it on your computer, can't it conflict
>> with another network in your environment?  Maybe checking from inside
>> the VM as described by Nadav can help.
>>
>
> We can add a fake entry in Lago init file just as we do for hosted-engine.
> Most importantly, it'll create a MAC to IP address mapping in libvirt's
> DHCP.
> Of course, then we need to use this MAC.
> I somehow remember doing this at some point but never completing the task
> :(
> Y.
>
>
>>
>> > And in webadmin (https://engine/ovirt-engine/webadmin/#vms) IP Address
>> > field is empty.
>>
>> This is OK, I think ovirt-guest-agent must be installed and running in
>> the VM to report the IP address.  If it is not then the information is
>> missing in the UI but that doesn't mean the network is not working.
>>
>> Regards,
>> Milan
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