problem with amulet and ssh

[Nicolás Pace]

This problem can be eluded by removing the ~/.ssh/known_hosts and
/root/.ssh/known_hosts files.

Regards,

On Fri, Feb 13, 2015 at 3:12 PM, Marco Ceppi <marco.ceppi at canonical.com>
wrote:

> Thanks Nicolás for brining this to our attention and Stuart for shedding
> light on how deep this bug runs. While it's true we're kind of tied to
> doing what Juju does, that doesn't mean we can't look at ways to alleviate
> this in Amulet to avoid tests to prevent them from failing.
>
> On Fri, Feb 13, 2015 at 12:38 PM, Stuart Bishop <
> stuart.bishop at canonical.com> wrote:
>
>> On 13 February 2015 at 09:42, Nicolás Pace <nicopace at gmail.com> wrote:
>> > Hi guys,
>> > I'm having a problem with amulet.
>> > i implemented a test with this chunk of code inside:
>> >
>> > logstash_indexer_agent = d.sentry.unit['logstash-indexer/0']
>> > curl_response = logstash_indexer_agent.run("curl
>> > http://127.0.0.1:9200/index/_search?size=1")[0]
>> > print(curl_response)
>> >
>> > that print is throwing this:
>> > http://paste.ubuntu.com/10197382/
>> >
>> > I found a fixed bug that appears to be similar to this one:
>> > https://bugs.launchpad.net/ubuntu-ci-services-itself/+bug/1283198
>> >
>> > Any idea what could it be?
>>
>> Good timing. This one bit me enough times today that I linked the
>> original bug from 2011 to Amulet.
>> https://bugs.launchpad.net/juju/+bug/802117.
>>
>> What is happening is juju pollutes both ~/.ssh/known_hosts and
>> ~root/.ssh/known_hosts with provisioned host keys and they are never
>> cleaned up. When the IP addresses gets recycled, which seems to happen
>> a few times a day recently, all sorts of things start randomly
>> failing. Particularly test suites that need to 'juju ssh' or 'juju
>> run' stuff automatically.
>>
>> The simple fix is having juju pass an option to ssh to not use the
>> user's known_hosts files, instead a file specific to the environment.
>> Extra points for having juju clean out keys when machines are
>> destroyed.
>>
>> --
>> Stuart Bishop <stuart.bishop at canonical.com>
>>
>> --
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>>
>
>


-- 
Ing. Nicolás Pace
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