Xen-unstable and Remus

Xen-unstable and Remus

[gilberto nunes]

Hi folks


I would to know if somebody here use remus with xen-unstable...

I deploy two servers with this tools and see some abnormal behavior.

I have this xen HVM:

kernel = "/usr/lib/xen/boot/hvmloader"
device_model = '/usr/lib/xen/bin/qemu-dm'
builder='hvm'
memory = 512
shadow_memory = 16
name = "Windows-2003"
vif=['mac=00:13:3e:37:9f:9e,bridge=xenbr0']
disk=['phy:/dev/drbd0,hda,w', 
'file:/storage/ISOS/win2003-STR2-i386.iso,hdc:cdrom,r']
boot="c"
on_poweroff = 'destroy'
on_reboot = 'restart'
n_crash = 'restart'
sdl=0
vnc=1
vnclisten="0.0.0.0"
stdvga=0
serial='pty'

I success create a vm on server xen-0 (my master node).
I success migrate the vm to xen-1 (my slave node).
I came back successfully vm to xen-0.

When I run remus -i 100 Windows-2003 xen-slave, I see the vm on slave 
node turn paused and vm started on master node.
I see remus continuously send packages to slave node.
But after 3 or 5 minutes, I see the the VM on master node enter in 
suspend mode without any human intervention! :)
I see that state of vm on slave node has change also, to started mode ( 
xm list show a ---b-- state).
After this point, the vm freeze and everything goes to down!!!!

Some details about my enviroment:

Two Dell PowerEdge T300 with 1 GB of memory (I know! It's not enoght) 
and 160 GB of hard disk.
CentOS x86_64 with kernel 2.6.18.8 compile against xen-unstable...
I have a isolated network to performer live migration and remus...

I hope to be clear here....

Thanks for any help








-- 
*Gilberto Nunes Ferreira*
*TI*
*Selbetti Gestão de Documentos*
*Telefone: +55 (47) 3441-6004*
*Celular: +55 (47) 8861-6672*



<><

Re: Xen-unstable and Remus

[gilberto nunes]

HI again

I recompile xen-unstable, and at this time, I have remus running with 
flag --no-net and everything seems good...

I just see that VM on master node change your state between -b----, 
r----- and ---s--, in feel seconds...

I do not know if this is a desired behavior or not...


Thanks a lot

gilberto nunes escreveu:
> Hi folks
>
>
> I would to know if somebody here use remus with xen-unstable...
>
> I deploy two servers with this tools and see some abnormal behavior.
>
> I have this xen HVM:
>
> kernel = "/usr/lib/xen/boot/hvmloader"
> device_model = '/usr/lib/xen/bin/qemu-dm'
> builder='hvm'
> memory = 512
> shadow_memory = 16
> name = "Windows-2003"
> vif=['mac=00:13:3e:37:9f:9e,bridge=xenbr0']
> disk=['phy:/dev/drbd0,hda,w', 
> 'file:/storage/ISOS/win2003-STR2-i386.iso,hdc:cdrom,r']
> boot="c"
> on_poweroff = 'destroy'
> on_reboot = 'restart'
> n_crash = 'restart'
> sdl=0
> vnc=1
> vnclisten="0.0.0.0"
> stdvga=0
> serial='pty'
>
> I success create a vm on server xen-0 (my master node).
> I success migrate the vm to xen-1 (my slave node).
> I came back successfully vm to xen-0.
>
> When I run remus -i 100 Windows-2003 xen-slave, I see the vm on slave 
> node turn paused and vm started on master node.
> I see remus continuously send packages to slave node.
> But after 3 or 5 minutes, I see the the VM on master node enter in 
> suspend mode without any human intervention! :)
> I see that state of vm on slave node has change also, to started mode 
> ( xm list show a ---b-- state).
> After this point, the vm freeze and everything goes to down!!!!
>
> Some details about my enviroment:
>
> Two Dell PowerEdge T300 with 1 GB of memory (I know! It's not enoght) 
> and 160 GB of hard disk.
> CentOS x86_64 with kernel 2.6.18.8 compile against xen-unstable...
> I have a isolated network to performer live migration and remus...
>
> I hope to be clear here....
>
> Thanks for any help
>
>
>
>
>
>
>
>

-- 
*Gilberto Nunes Ferreira*
*TI*
*Selbetti Gestão de Documentos*
*Telefone: +55 (47) 3441-6004*
*Celular: +55 (47) 8861-6672*



<><

Re: Xen-unstable and Remus (It's drive me crazy...)

[gilberto nunes]

Hi again...

Now, I active -i 1000 on remus tool and I have VM on both sides with 
-b---- state!

This is a normal behavior???

thanks


gilberto nunes escreveu:
> HI again
>
> I recompile xen-unstable, and at this time, I have remus running with 
> flag --no-net and everything seems good...
>
> I just see that VM on master node change your state between -b----, 
> r----- and ---s--, in feel seconds...
>
> I do not know if this is a desired behavior or not...
>
>
> Thanks a lot
>
> gilberto nunes escreveu:
>> Hi folks
>>
>>
>> I would to know if somebody here use remus with xen-unstable...
>>
>> I deploy two servers with this tools and see some abnormal behavior.
>>
>> I have this xen HVM:
>>
>> kernel = "/usr/lib/xen/boot/hvmloader"
>> device_model = '/usr/lib/xen/bin/qemu-dm'
>> builder='hvm'
>> memory = 512
>> shadow_memory = 16
>> name = "Windows-2003"
>> vif=['mac=00:13:3e:37:9f:9e,bridge=xenbr0']
>> disk=['phy:/dev/drbd0,hda,w', 
>> 'file:/storage/ISOS/win2003-STR2-i386.iso,hdc:cdrom,r']
>> boot="c"
>> on_poweroff = 'destroy'
>> on_reboot = 'restart'
>> n_crash = 'restart'
>> sdl=0
>> vnc=1
>> vnclisten="0.0.0.0"
>> stdvga=0
>> serial='pty'
>>
>> I success create a vm on server xen-0 (my master node).
>> I success migrate the vm to xen-1 (my slave node).
>> I came back successfully vm to xen-0.
>>
>> When I run remus -i 100 Windows-2003 xen-slave, I see the vm on slave 
>> node turn paused and vm started on master node.
>> I see remus continuously send packages to slave node.
>> But after 3 or 5 minutes, I see the the VM on master node enter in 
>> suspend mode without any human intervention! :)
>> I see that state of vm on slave node has change also, to started mode 
>> ( xm list show a ---b-- state).
>> After this point, the vm freeze and everything goes to down!!!!
>>
>> Some details about my enviroment:
>>
>> Two Dell PowerEdge T300 with 1 GB of memory (I know! It's not enoght) 
>> and 160 GB of hard disk.
>> CentOS x86_64 with kernel 2.6.18.8 compile against xen-unstable...
>> I have a isolated network to performer live migration and remus...
>>
>> I hope to be clear here....
>>
>> Thanks for any help
>>
>>
>>
>>
>>
>>
>>
>>
>

-- 
*Gilberto Nunes Ferreira*
*TI*
*Selbetti Gestão de Documentos*
*Telefone: +55 (47) 3441-6004*
*Celular: +55 (47) 8861-6672*



<><

Re: Xen-unstable and Remus

[Brendan Cully]

On Friday, 18 December 2009 at 11:29, gilberto nunes wrote:
> HI again
> 
> I recompile xen-unstable, and at this time, I have remus running with
> flag --no-net and everything seems good...
> 
> I just see that VM on master node change your state between -b----,
> r----- and ---s--, in feel seconds...
> 
> I do not know if this is a desired behavior or not...

Yes, that's normal. It should go between r (or b) and s at the
interval you've specified with -i (200ms, or 5/sec by default).

Re: Xen-unstable and Remus (It's drive me crazy...)

[Brendan Cully]

On Friday, 18 December 2009 at 11:43, gilberto nunes wrote:
> Hi again...
> 
> Now, I active -i 1000 on remus tool and I have VM on both sides with
> -b---- state!
> 
> This is a normal behavior???

No, that happens if the backup thinks that the primary failed, but it
hasn't. In this case, it's because the primitive heartbeat built into
Remus expects traffic at least every 500ms, so at 1000 it's not
getting it. I'd recommend keeping -i at or below the default of 200
until we make the heartbeat smarter. You could also use something like
linux-HA's STONETH to kill off the primary before unleashing the
backup on the world. Seamless integration with linux-ha is a TODO
item.

Re: Xen-unstable and Remus (It's drive me crazy...)

[gilberto nunes]

Thanks for answers

I get success work withou -i option...

If I put -i flags, with 200 or minor, whatever, remus do not work 
properly....

Do you have any idea when remus go up to production state? Any date??

Thanks again

Brendan Cully escreveu:
> On Friday, 18 December 2009 at 11:43, gilberto nunes wrote:
>   
>> Hi again...
>>
>> Now, I active -i 1000 on remus tool and I have VM on both sides with
>> -b---- state!
>>
>> This is a normal behavior???
>>     
>
> No, that happens if the backup thinks that the primary failed, but it
> hasn't. In this case, it's because the primitive heartbeat built into
> Remus expects traffic at least every 500ms, so at 1000 it's not
> getting it. I'd recommend keeping -i at or below the default of 200
> until we make the heartbeat smarter. You could also use something like
> linux-HA's STONETH to kill off the primary before unleashing the
> backup on the world. Seamless integration with linux-ha is a TODO
> item.
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
>   

-- 
*Gilberto Nunes Ferreira*
*TI*
*Selbetti Gestão de Documentos*
*Telefone: +55 (47) 3441-6004*
*Celular: +55 (47) 8861-6672*



<><

Re: Xen-unstable and Remus (It's drive me crazy...)

[gilberto nunes]

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