Re: [Qemu-devel] Cryptic errors from PIP install if missing openssl-devel

["Lukáš Doktor" <ldoktor@redhat.com>]

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Dne 03. 09. 19 v 17:56 Lukáš Doktor napsal(a):
> Dne 03. 09. 19 v 17:47 Cleber Rosa napsal(a):
>> On Tue, Sep 03, 2019 at 05:22:48PM +0200, Philippe Mathieu-Daudé wrote:
>>> On 9/3/19 5:08 PM, Cleber Rosa wrote:
>>>> On Thu, Aug 29, 2019 at 11:46:15AM +0200, Philippe Mathieu-Daudé wrote:
>>>>>
>>>>> class avocado.utils.ssh.Session(address, credentials)
>>>>>
>>>>>   Parameters:	
>>>>>
>>>>>     credentials (tuple)
>>>>>          username and path to a key for authentication purposes
>>>>>
>>>>> The current test uses username + password.
>>>>> Can we use this credentials with the Avocado module?
>>>>> (The image used is prebuilt).
>>>>>
>>>>
>>>> I'm working on adding password based authentication.  To keep the API
>>>> the same, I'm thinking of checking if the second credential item is an
>>>> existing file, if it is, assume one containing a key.  If not, assume
>>>> it's a password.
>>>
>>> Why not use a dictionary? Keys would be explicit.
>>>
>>
>> Now it's clear that a dict would've been the best option from the
>> beginning, but I was wrongly optimistic, and biased by the
>> "avocado.utils.vmimage" + "avocado.utils.cloudinit" combination, that
>> we'd only have to deal with key based auth.
>>
>> So the question now is really how to evolve the API, either breaking
>> the current version or not.  At this time, I'd try to keep the API
>> unchanged, given that it still feels logical that the tuple is about
>> credentials, just that the second item can be either a path to a key
>> or password.
>>
>> Thoughts?
>> - Cleber.
>>
> 
> How old is this feature? I guess it's not yet widely used so it's probably better to change it now than suffer the consequences when hundreds of people rely on it...
> 
> Regards,
> Lukáš
> 
> PS: My favorited solution would be:
> 
>     with Session(addr=(hostname, port), username="user", key="/path/to/key", password="pass"):
>         ...

... actually I'd even avoid the use of tuple and simply add `addr=hostname, port=None, username...`. (basically the way it's in Avocado-vt, it works well there with some additional options ;-) )

Regards,
Lukáš

> 
> 
>>>> This should make the use simple in the case of keys:
>>>>
>>>>   with Session(('hostname', port),
>>>>                ('username', '/path/to/key')) as session:
>>>>       session.cmd('cmd')
>>>>
>>>> And passwords:
>>>>
>>>>   with Session(('hostname', port),
>>>>                ('username', 'p@ssw0rD')) as session:
>>>>       session.cmd('cmd')
>>>>
>>>> It's being tracked here:
>>>>   https://trello.com/c/uetpIgML/1517-avocadoutilssh-implement-password-based-auth
>>>>
>>>> I'll try to have it in Avocado's 72.0 release due next week.
>>>>
>>>> Let me know how that sounds, and thanks for the feedback.
>>>> - Cleber.
>>>>
> 
> 



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