date:20191023

Re: [libvirt-users] Reg: Adding "edu" device using XML file

2019-10-23 Thread bharath paulraj

Hello Han,

Thanks for your suggestions. I will check it out.

Regards,
Bharath

On Thu, Oct 24, 2019 at 6:17 AM Han Han  wrote:

>
>
> On Wed, Oct 23, 2019 at 4:27 PM bharath paulraj 
> wrote:
>
>> Hello Han,
>>
>> Thanks for the response. The XML option with qemu:commandline works if
>> the device is added during the VM creation. But I would like to hot-plug
>> the device to the running VM. I can add the device using the command line
>> 
>>
>> But I would like to add the device using the XML file, like > attach-device VM-Name xmlfile.xml>. If the XML support is not provided in
>> libvirt, Is there a document or pointers available to show how to add new
>> device in libvirt xml code?
>>
>> ASAIK there is no development guide for adding new device in libvirt xml
> code.
> Maybe you can refer to former watchdog device patch series:
> https://www.redhat.com/archives/libvir-list/2009-October/msg00564.html
> https://www.redhat.com/archives/libvir-list/2017-September/msg00078.html
>
>> Thanks,
>> Bharath
>>
>> On Wed, Oct 23, 2019 at 12:57 PM Han Han  wrote:
>>
>>>
>>>
>>> On Tue, Oct 22, 2019 at 5:41 PM bharath paulraj 
>>> wrote:
>>>
 Hi Team,

 I am exploring "edu" device in QEMU to add my own custom device. I am
 able to add the device using the command line. Would it be possible to add
 the device using XML file through libvirt?

>>> Hello, edu device is not implemented to libvirt xml. However you can use
>>> it via custom device in libvirt:
>>> Just define a domain like following:
>>> 
>>> ...
>>>  
>>>
>>> 
>>>  
>>> 
>>>
>>> More reference: https://libvirt.org/drvqemu.html#qemucommand
>>>


>>> --
 Regards,
 Bharath
 ___
 libvirt-users mailing list
 libvirt-users@redhat.com
 https://www.redhat.com/mailman/listinfo/libvirt-users
>>>
>>>
>>>
>>> --
>>> Best regards,
>>> ---
>>> Han Han
>>> Quality Engineer
>>> Redhat.
>>>
>>> Email: h...@redhat.com
>>> Phone: +861065339333
>>>
>>
>>
>> --
>> Regards,
>> Bharath
>>
>
>
> --
> Best regards,
> ---
> Han Han
> Quality Engineer
> Redhat.
>
> Email: h...@redhat.com
> Phone: +861065339333
>


-- 
Regards,
Bharath
___
libvirt-users mailing list
libvirt-users@redhat.com
https://www.redhat.com/mailman/listinfo/libvirt-users

Re: [libvirt-users] Reg: Adding "edu" device using XML file

2019-10-23 Thread Han Han

On Wed, Oct 23, 2019 at 4:27 PM bharath paulraj 
wrote:

> Hello Han,
>
> Thanks for the response. The XML option with qemu:commandline works if the
> device is added during the VM creation. But I would like to hot-plug the
> device to the running VM. I can add the device using the command line
> 
>
> But I would like to add the device using the XML file, like  attach-device VM-Name xmlfile.xml>. If the XML support is not provided in
> libvirt, Is there a document or pointers available to show how to add new
> device in libvirt xml code?
>
> ASAIK there is no development guide for adding new device in libvirt xml
code.
Maybe you can refer to former watchdog device patch series:
https://www.redhat.com/archives/libvir-list/2009-October/msg00564.html
https://www.redhat.com/archives/libvir-list/2017-September/msg00078.html

> Thanks,
> Bharath
>
> On Wed, Oct 23, 2019 at 12:57 PM Han Han  wrote:
>
>>
>>
>> On Tue, Oct 22, 2019 at 5:41 PM bharath paulraj 
>> wrote:
>>
>>> Hi Team,
>>>
>>> I am exploring "edu" device in QEMU to add my own custom device. I am
>>> able to add the device using the command line. Would it be possible to add
>>> the device using XML file through libvirt?
>>>
>> Hello, edu device is not implemented to libvirt xml. However you can use
>> it via custom device in libvirt:
>> Just define a domain like following:
>> 
>> ...
>>  
>>
>> 
>>  
>> 
>>
>> More reference: https://libvirt.org/drvqemu.html#qemucommand
>>
>>>
>>>
>> --
>>> Regards,
>>> Bharath
>>> ___
>>> libvirt-users mailing list
>>> libvirt-users@redhat.com
>>> https://www.redhat.com/mailman/listinfo/libvirt-users
>>
>>
>>
>> --
>> Best regards,
>> ---
>> Han Han
>> Quality Engineer
>> Redhat.
>>
>> Email: h...@redhat.com
>> Phone: +861065339333
>>
>
>
> --
> Regards,
> Bharath
>


-- 
Best regards,
---
Han Han
Quality Engineer
Redhat.

Email: h...@redhat.com
Phone: +861065339333
___
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libvirt-users@redhat.com
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Re: [libvirt-users] Confused setting up a "Virtual Server Hosting" config

2019-10-23 Thread Paul O'Rorke

Brilliant! Thanks Laine.

I really appreciate the help.

you could also avoid setting up the bridge and just use macvtap bridge
mode as you say you've done on your own network. The only limitation
of that is that it doesn't permit direct communication between the
host and the guests. If that limitation is okay with you, then that's
fine.

How does the performance of a bridge on the host (Ubuntu bridge-utils)
typically compare to a macvtap bridge? Is there an expected performance
advantage of one over the other? I was hoping for better performance
out of the macvtap bridge.

Time to buy some extra IPs it seems...

Most appreciated Laine.

*Paul O'Rorke*
*Tracker Software Products (Canada) Limited *
www.tracker-software.com
Tel: +1 (250) 324 1621
Fax: +1 (250) 324 1623

Support:
http://www.tracker-software.com/support
Download latest Releases
http://www.tracker-software.com/downloads/

On 2019-10-23 9:44 a.m., Laine Stump wrote:

On 10/23/19 12:43 AM, Paul O'Rorke wrote:

Hi list,

Can anyone advise me on the correct/best set up for Virtual Server
Hosting?

I have a guest in my server room wish to migrate to dedicated server
I rented in an offsite in a data centre. I rented a box with one NIC
and one public IP. I installed KVM on it and a guest. (both Ubuntu
18.04 LTS server edition). I am struggling to get the networking right.

Essentially I want the "Virtual Server Hosting" config mentioned here:
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html-single/virtualization_administration_guide/index#sub-sect-routed-mode

I have not had any luck setting that up. It is listed in the
"Routed" section but the graphic says the virtual switch should be in
bridged mode.

I also tried using macvtap, and since I have only one guest was
expecting to be able to just use the host IP

No, you will need one IP for the host, and one IP for the guest in
either bridged mode or for macvtap.

but it looks like the data centre have restricted packets to the MAC
address of the host NIC.

Yes, there is that restriction too. Usually hosting providers will
lock down the MAC addresses they allow through ports, in order to
prevent hostile clients from doing MAC spoofing to capture other
clients' traffice.

When

set up I can ping the public IP (it is both eh host and the guest?)

No. An IP address refers to one entity. It can be the host or the
guest, but not both.

but
not their gateway. Should a macvtap not be presenting the MAC
address of the host NIC to the router and thus allowing packets from
the guest?

No, that is not what macvtap does. It creates a virtual NIC (macvtap
device) that is connected directly to the physical NIC, and traffic
from that device is injected directly into the output queue of the
physical device, MAC address and all.

I clearly have a lack of understanding of how this is working and how
it is meant to work. When I tried the same thing on mt
hardware/network I can create myltiple guests that all use the
macvtap interface and I have no problems getting connectivity to the
outside world.

Because on your own network you have no MAC address locking on your
switch port, and have multiple IP addresses available (one for each
guest) from the local DHCP server.

Before I approach the data centre about this I want to be sure I
understand what I am doing. I ultimately want to host a mail server
and several different web servers as guests all behind this one
host. I would alias their public IPs to the host NIC and use
IPtables to route traffic based on destination IP.

The only reason you would want iptables to be involved is if you were
limited to only 1 IP address for the host + all the guests. In that
case you could use *port* forwarding to cause incoming traffic to the
host on particular TCP ports to be forwarded to different guests:

https://wiki.libvirt.org/page/Networking#Forwarding_Incoming_Connections

Does that make sense? Can anyone suggest the right way to achieve this?

No, not really :-)

If you can only get a single IP address, then you'll need to look at
the above link. If you can get the hosting provider to sell you extra
IP addresses / MAC addresses (usually extra IPs cost money but MAC
addresses are free, they just want to know what they are - you will
need one *of each* for each guest), then you should put a bridge on
your host's ethernet, and connect all the guests to that bridge,
configuring each with its unique IP address / MAC address / default
route info given to you by the hosting provider. You can use this as a
reference to configure the host and guests:

https://wiki.libvirt.org/page/Networking#Debian.2FUbuntu_Bridging

(you could also avoid setting

Re: [libvirt-users] Confused setting up a "Virtual Server Hosting" config

2019-10-23 Thread Laine Stump

On 10/23/19 12:43 AM, Paul O'Rorke wrote:

Hi list,

Can anyone advise me on the correct/best set up for Virtual Server Hosting?

I have a guest in my server room wish to migrate to dedicated server I
rented in an offsite in a data centre. I rented a box with one NIC and
one public IP. I installed KVM on it and a guest. (both Ubuntu 18.04
LTS server edition). I am struggling to get the networking right.

I have not had any luck setting that up. It is listed in the "Routed"
section but the graphic says the virtual switch should be in bridged mode.

I also tried using macvtap, and since I have only one guest was
expecting to be able to just use the host IP

No, you will need one IP for the host, and one IP for the guest in
either bridged mode or for macvtap.

but it looks like the data
centre have restricted packets to the MAC address of the host NIC.

Yes, there is that restriction too. Usually hosting providers will lock
down the MAC addresses they allow through ports, in order to prevent
hostile clients from doing MAC spoofing to capture other clients' traffice.

When

set up I can ping the public IP (it is both eh host and the guest?)

No. An IP address refers to one entity. It can be the host or the guest,
but not both.

but
not their gateway. Should a macvtap not be presenting the MAC address
of the host NIC to the router and thus allowing packets from the guest?

No, that is not what macvtap does. It creates a virtual NIC (macvtap
device) that is connected directly to the physical NIC, and traffic from
that device is injected directly into the output queue of the physical
device, MAC address and all.

I clearly have a lack of understanding of how this is working and how it
is meant to work. When I tried the same thing on mt hardware/network I
can create myltiple guests that all use the macvtap interface and I have
no problems getting connectivity to the outside world.

Because on your own network you have no MAC address locking on your
switch port, and have multiple IP addresses available (one for each
guest) from the local DHCP server.

Before I approach the data centre about this I want to be sure I
understand what I am doing. I ultimately want to host a mail server
and several different web servers as guests all behind this one host. I
would alias their public IPs to the host NIC and use IPtables to route
traffic based on destination IP.

The only reason you would want iptables to be involved is if you were
limited to only 1 IP address for the host + all the guests. In that case
you could use *port* forwarding to cause incoming traffic to the host on
particular TCP ports to be forwarded to different guests:

https://wiki.libvirt.org/page/Networking#Forwarding_Incoming_Connections

Does that make sense? Can anyone suggest the right way to achieve this?

No, not really :-)

If you can only get a single IP address, then you'll need to look at the
above link. If you can get the hosting provider to sell you extra IP
addresses / MAC addresses (usually extra IPs cost money but MAC
addresses are free, they just want to know what they are - you will need
one *of each* for each guest), then you should put a bridge on your
host's ethernet, and connect all the guests to that bridge, configuring
each with its unique IP address / MAC address / default route info given
to you by the hosting provider. You can use this as a reference to
configure the host and guests:

https://wiki.libvirt.org/page/Networking#Debian.2FUbuntu_Bridging

(you could also avoid setting up the bridge and just use macvtap bridge
mode as you say you've done on your own network. The only limitation of
that is that it doesn't permit direct communication between the host and
the guests. If that limitation is okay with you, then that's fine.)

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Re: [libvirt-users] Reg: Adding "edu" device using XML file

2019-10-23 Thread bharath paulraj

Hello Han,

Thanks for the response. The XML option with qemu:commandline works if the
device is added during the VM creation. But I would like to hot-plug the
device to the running VM. I can add the device using the command line

But I would like to add the device using the XML file, like . If the XML support is not provided in
libvirt, Is there a document or pointers available to show how to add new
device in libvirt xml code?

Thanks,
Bharath

On Wed, Oct 23, 2019 at 12:57 PM Han Han  wrote:

>
>
> On Tue, Oct 22, 2019 at 5:41 PM bharath paulraj 
> wrote:
>
>> Hi Team,
>>
>> I am exploring "edu" device in QEMU to add my own custom device. I am
>> able to add the device using the command line. Would it be possible to add
>> the device using XML file through libvirt?
>>
> Hello, edu device is not implemented to libvirt xml. However you can use
> it via custom device in libvirt:
> Just define a domain like following:
> 
> ...
>  
>
> 
>  
> 
>
> More reference: https://libvirt.org/drvqemu.html#qemucommand
>
>>
>>
> --
>> Regards,
>> Bharath
>> ___
>> libvirt-users mailing list
>> libvirt-users@redhat.com
>> https://www.redhat.com/mailman/listinfo/libvirt-users
>
>
>
> --
> Best regards,
> ---
> Han Han
> Quality Engineer
> Redhat.
>
> Email: h...@redhat.com
> Phone: +861065339333
>

-- 
Regards,
Bharath
___
libvirt-users mailing list
libvirt-users@redhat.com
https://www.redhat.com/mailman/listinfo/libvirt-users

Re: [libvirt-users] Reg: Adding "edu" device using XML file

2019-10-23 Thread Han Han

On Tue, Oct 22, 2019 at 5:41 PM bharath paulraj 
wrote:

> Hi Team,
>
> I am exploring "edu" device in QEMU to add my own custom device. I am able
> to add the device using the command line. Would it be possible to add the
> device using XML file through libvirt?
>
Hello, edu device is not implemented to libvirt xml. However you can use it
via custom device in libvirt:
Just define a domain like following:

...
 
   

 


More reference: https://libvirt.org/drvqemu.html#qemucommand

>
>
-- 
> Regards,
> Bharath
> ___
> libvirt-users mailing list
> libvirt-users@redhat.com
> https://www.redhat.com/mailman/listinfo/libvirt-users



-- 
Best regards,
---
Han Han
Quality Engineer
Redhat.

Email: h...@redhat.com
Phone: +861065339333
___
libvirt-users mailing list
libvirt-users@redhat.com
https://www.redhat.com/mailman/listinfo/libvirt-users

Re: [libvirt-users] Reg: Adding "edu" device using XML file

Re: [libvirt-users] Reg: Adding "edu" device using XML file

Re: [libvirt-users] Confused setting up a "Virtual Server Hosting" config

Re: [libvirt-users] Confused setting up a "Virtual Server Hosting" config

Re: [libvirt-users] Reg: Adding "edu" device using XML file

Re: [libvirt-users] Reg: Adding "edu" device using XML file

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