[CRIU] [PATCH 0/3] p.haul: ssh tunneling, v5

[Pavel Emelyanov]

On 10/31/2014 02:18 PM, Ruslan Kuprieiev wrote:
> On 29.10.2014 11:29, Ruslan Kuprieiev wrote:
>> On 29.10.2014 10:03, Pavel Emelyanov wrote:
>>> On 10/28/2014 01:18 AM, Ruslan Kuprieiev wrote:
>>>> v2, use ssh tunnel by default, enhanced opts handling
>>>> v3, send addr to the client
>>>> v4, use rpc to send socket name
>>>> v5, add --no-ssh option
>>>>
>>>> Ruslan Kuprieiev (3):
>>>>   p.haul: do not use getsockname() as a hash_name, v4
>>>>   p.haul: add --port option to p.haul-service
>>>>   p.haul: use ssh tunneling and controll it with ssh* cmdline opts, v2
>>>>
>>>>  p.haul          | 17 +++++++++++++++--
>>>>  p.haul-service  | 15 ++++++++++++++-
>>>>  p_haul_iters.py |  6 +++---
>>>>  ssh_tunnel.py   | 36 ++++++++++++++++++++++++++++++++++++
>>>>  util.py         | 10 ++++++++++
>>>>  xem_rpc.py      | 53 ++++++++++++++++++++++++++++++++++++++---------------
>>>>  6 files changed, 116 insertions(+), 21 deletions(-)
>>>>  create mode 100644 ssh_tunnel.py
>>>>
>>> I'm still not happy with the fact the spawned ssh with port forwarding
>>> takes time to prepare and we have to retry connecting to it.
>>>
>>> I was today told about the paramiko package -- https://pypi.python.org/pypi/paramiko/
>>> Isn't it better to utilize this one?
>>
>> I've tried to use paramiko, but it is pretty slow and for port forwarding requires
>> writing own local server <https://github.com/paramiko/paramiko/blob/master/demos/forward.py> in python. It is flexible, but it looks like an overkill to me.
>>
> 
> I did some tests on p.haul/test/zdtm and here is what i've got:
> ssh + Popen = ~0.8 sec total.
> paramiko + python server = ~1.5 sec total.

OK. Plz, do one more attempt :) What if we ssh to remote host and launch the p.haul-service
there via this ssh session, not in advance. Would that look nicer in the code?

>>> Another question -- how does this machinery works in qemu? Can you find out?
>>
>> Qemu? Ok, i'll try.
>>
> 
> Couldn't find anything suitable for our case.

How does it work?