Re: [MirageOS-devel] Cannot deploy a Unikernel to a XenServer pool running XS 6.2

[Jon Ludlam <jjl25@xxxxxxxxx>]

On 22/10/14 14:13, Dave Scott wrote:
>> On 22 Oct 2014, at 14:09, Jon Ludlam <jjl25@xxxxxxxxx> wrote:
>>
>> On 22/10/14 03:13, Sergio Visinoni wrote:
>>
>>> For issue #2, the log line you posted is probably a failure in the cleanup 
>>> following the actual root cause. We can try to repro locally tomorrow, but 
>>> it may be worth taking a bugtool 
>>> (http://support.citrix.com/article/CTX125372) which could help diagnose it.
>>>
>>> I see, thanks for clarifying. It's totally non trivial to understand XAPI 
>>> log messages for someone that is not familiar with the internals, that I've 
>>> just naively looked for "error" lines.
>>> I've generated the report, and it's almost 57MB. Is there a way I can send 
>>> it to you without using the ML? I have both size and confidentiality issues 
>>> with doing so. I'm in CDT timezone, I will probably be in IRC/#mirage in 
>>> the afternoon CET. Feel free to contact me there for details.
>> OK, will try to be around later.
>>>  
>>>
>>> In the meantime, for a single host pool, you could just copy the unikernel 
>>> directly onto the XenServer. Something like:
>>>
>>> ssh root@xenserver mkdir /boot/guest
>>> scp unikernel.xen root@xenserver:/boot/guest
>>>
>>> Just to clarify: the single host pool scenario is working perfectly both in 
>>> 6.2 (with latest patches) and Creedence beta 3.
>>> The problem only shows up in a multi-host pool running 6.2 (hotfixes up to 
>>> SP1).
>>>
>> Apologies, I misunderstood. The workaround will be fine in a pool so long as 
>> you copy the kernel onto each host into /boot/guest/.
>>
>> We'll try to repro today to see what the problem may be.
> From the description of the symptom (works single host but not in a pool) my 
> guess would be that xe-unikernel-upload is failing to respond to an HTTP 
> redirect from xapi.
>
> Perhaps rather than looking at the logs, it would be better to run something 
> like
>
>   strace -s 1000 xe-unikernel-upload …
>
> — this should capture the network traffic. Or use plain http and capture with 
> tcpdump/wireshark.
>
> Cheers,
> Dave
The error mentioned SSL write error - is there an option to have SSL
turned off for ease of debugging?

Jon


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