RE: [Xen-users] remus failure

[<Takeshi.M@xxxxxxxxxxxxxxx>]

Sorry,
I forgot to attache file.
I will send again.

-----Original Message-----
From: Mori, Takeshi (Takeshi.M@xxxxxxxxxxxxxxx) 
Sent: Tuesday, February 22, 2011 12:41 PM
To: 'Shriram Rajagopalan'
Cc: '<xen-users@xxxxxxxxxxxxxxxxxxx>'; '<todd.deshane@xxxxxxx>'
Subject: RE: [Xen-users] remus failure

Hi Shriram,
Thank you for your advice.

> Is this the xm dmesg output after destroying vm at primary ?
>  That is what I am looking for. 
Sorry,
The "backup_xm_dmesg.txt" file attached to the previous e-mail is without 
destroying vm at primary.
The xm dmesg output after that is in "backup_xm_dmesg_after_destroy.txt" file.
The first message in destroying vm at primary is on the 193rd line.

>> Could you point them out if the mistakes are found in the above environment 
>> and procedure?
> I don't see any. 
Where is the cause of remus problem, if there is no problem in my environment 
and procedure?

> Though I don't understand why you would run with --no-net.
Because I want to cut off process and load unrelated to this problem. 

Is Remus unstable?
Would you tell me the combination running surely Remus about version and 
configuration of Xen, Dom0 OS, and DomU OS?

I will retry to run remus with Xen4.0.0, according to Remus 
Document(<http://nss.cs.ubc.ca/remus/doc.html>).
I hope your advice.

Thanks in advance. 
Best regards.

-----Original Message-----
From: Shriram Rajagopalan [mailto:rshriram@xxxxxxxxx]
Sent: Tuesday, February 22, 2011 1:28 AM
To: Mori, Takeshi (Takeshi.M@xxxxxxxxxxxxxxx)
Cc: <xen-users@xxxxxxxxxxxxxxxxxxx>; <todd.deshane@xxxxxxx>
Subject: Re: [Xen-users] remus failure

On 2011-02-21, at 3:16 AM, <Takeshi.M@xxxxxxxxxxxxxxx> wrote:

> Hi Shriram,
> Thank you for the reply.
> 
>> 1. What kind of workload were you running?
> I was running default processes started with OS in the case of Dom0 and DomU.
> 
>> 2. Are there any debug outputs from xen when restoring the VM?
>>   (you can do "xm dmesg" and you ll know if xen has any complaints) If the 
>> error outputs from xen match with the one I had quoted in the email thread 
>> you refer to, then I would get a clearer picture of how to help you out.
> The result of "xm dmesg" command at primary host is in "primary_xm_dmesg.txt" 
> file attached to this e-mail.
> The result of "xm info" command at primary host is in "primary_xm_info.txt" 
> file.
> The result of "xm dmesg" command at backup host is in "backup_xm_dmesg.txt" 
> file.
Is this the xm dmesg output after destroying vm at primary ?
 That is what I am looking for. 
> The result of "xm info" command at backup host is in "backup_xm_info.txt" 
> file.
> 
> When "xm destroy DomU" command was executed at primary host, the xend log in 
> backup host was created.
> The log is in "backup_xend.log" file.
> When "xm destroy DomU" command was executed at primary host, the rest of log 
> in backup host was created.
> The log is in "backup_all.log" file.
> 
> Details of my environment are as follows.
> - Xen version
>    4.0.2-rc1
> - Dom0 OS
>    Fedora13 64bit(kernel 2.6.32.27-xen)
> - DomU OS
>    CentOS5.4 32bit(kernel 2.6.18.8-xen)
> - kernel config(Dom0)
>    "Dom0_.config" file.
> - kernel config(DomU)
>    "DomU_.config" file.
> - Domain Config File
>    "Guest02" file.
> - xend-config.sxp
>    "xend-config.sxp" file.
> - Hardware
>    Dell PowerEdge T110
>    CPU : Xeon X3470 2.93GHz
>    Memory : 8GB
> 
> The procedure that I did is as follows. 
> 1. Start Dom0 at primary host and backup host. 
> 2. Start DomU at primary host. The DomU's name is Guest02.
> 3. Execute the "remus --no-net Guest02 10.21.35.30" command at primary host. 
> Backup host's IP address is 10.21.35.30.
> 4. Execute the "xm destroy Guest02" command at primary host.
> 
> Could you point them out if the mistakes are found in the above environment 
> and procedure?
> 
I don't see any. Though I don't understand why you would run with --no-net. But 
let's do that once we solve the failover issue. 
Shriram
> Thanks in advance. 
> Best regards.
> 
> -----Original Message-----
> From: Shriram Rajagopalan [mailto:rshriram@xxxxxxxxx]
> Sent: Sunday, February 20, 2011 12:35 PM
> To: Todd Deshane
> Cc: Mori, Takeshi (Takeshi.M@xxxxxxxxxxxxxxx); 
> xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-users] remus failure
> 
> Yes, I had solved that issue (albeit the solution is a hack).
> I need the following info
> 1. What kind of workload were you running?
> 2. Are there any debug outputs from xen when restoring the VM?
>    (you can do "xm dmesg" and you ll know if xen has any complaints) If the 
> error outputs from xen match with the one I had quoted in the email thread 
> you refer to, then I would get a clearer picture of how to help you out.
> 
> cheers
> shriram
> On Sat, Feb 19, 2011 at 5:14 PM, Todd Deshane <todd.deshane@xxxxxxx> wrote:
>> Maybe Shriram has some tips. I just added him to the CC.
>> 
>> On Wed, Feb 16, 2011 at 7:57 AM, ï
> <primary_xm_dmesg.txt>
> <primary_xm_info.txt>
> <backup_xm_dmesg.txt>
> <backup_xm_info.txt>
> <backup_xend.log>
> <backup_all.log>
> <Dom0_.config>
> <DomU_.config>
> <Guest02>
> <xend-config.sxp>

Attachment: backup_xm_dmesg_after_destroy.txt
Description: backup_xm_dmesg_after_destroy.txt

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