Hi Vincent, could you share a sample of the playbook you're running as well
as the results of running it with -f1, -f2 and -f4? That should determine
if the playbook is indeed being serialized at some point.
Do note, however, if you're doing something like this:
- local_action: ec2 ...
with_items:
- ...
- ...
- ...
you will see serialized performance. This is caused by the fact that each
pass through with_* loops must complete on all hosts before the next loop
begins, and with local_action you'd only be executing on a single host
(localhost), so this would constrain the playbook to a serial-like
performance.
Thanks!
On Mon, Sep 29, 2014 at 9:44 AM, Vincent Janelle <[email protected]>
wrote:
> Not sure how I'd send you a copy of /dev/null, unless ansible is
> attempting to parse the contents of ~/.ssh/known_hosts outside of ssh.
>
> On Monday, 29 September 2014 07:39:20 UTC-7, Michael DeHaan wrote:
>>
>> Any chance I can get a copy of your known_hosts file?
>>
>> Off list would be preferred.
>>
>> I'm not sure that's it, but I suspect it could be.
>>
>>
>>
>> On Mon, Sep 29, 2014 at 10:35 AM, Vincent Janelle <[email protected]>
>> wrote:
>>
>>> Just an update at Michael's request - seeing the exact same situations,
>>> with ec2.
>>>
>>> Setting this environment variable fixes this.
>>>
>>> On Thursday, 12 September 2013 15:34:33 UTC-7, Michael Blakeley wrote:
>>>>
>>>> On Thursday, September 12, 2013 3:21:23 PM UTC-7, James Cammarata wrote:
>>>>>
>>>>> I believe the initial iteration through the hosts is single-threaded,
>>>>> as that occurs before the forks are created, however can you demonstrate
>>>>> that your configuration is causing single-threaded behavior after the
>>>>> forks
>>>>> are running?
>>>>>
>>>>
>>>> Yes, I think so. I observe single-threading for every command
>>>> throughout long playbooks. Setting ANSIBLE_HOST_KEY_CHECKING=no resolves
>>>> that.
>>>>
>>>> Does the output from this single command help?
>>>>
>>>> $ ansible -i ec2.py tag_Name_test -f 9 -a date
>>>> ec2-54-200-43-114.us-west-2.compute.amazonaws.com | success | rc=0 >>
>>>> Thu Sep 12 21:23:33 UTC 2013
>>>> ec2-54-200-40-223.us-west-2.compute.amazonaws.com | success | rc=0 >>
>>>> Thu Sep 12 21:23:35 UTC 2013
>>>> ec2-54-200-33-219.us-west-2.compute.amazonaws.com | success | rc=0 >>
>>>> Thu Sep 12 21:23:36 UTC 2013
>>>> ec2-54-200-40-249.us-west-2.compute.amazonaws.com | success | rc=0 >>
>>>> Thu Sep 12 21:23:38 UTC 2013
>>>> ec2-54-200-43-44.us-west-2.compute.amazonaws.com | success | rc=0 >>
>>>> Thu Sep 12 21:23:40 UTC 2013
>>>> ec2-54-200-43-42.us-west-2.compute.amazonaws.com | success | rc=0 >>
>>>> Thu Sep 12 21:23:42 UTC 2013
>>>> ec2-54-200-40-224.us-west-2.compute.amazonaws.com | success | rc=0 >>
>>>> Thu Sep 12 21:23:41 UTC 2013
>>>> ec2-54-200-42-181.us-west-2.compute.amazonaws.com | success | rc=0 >>
>>>> Thu Sep 12 21:23:43 UTC 2013
>>>> ec2-54-200-42-164.us-west-2.compute.amazonaws.com | success | rc=0 >>
>>>> Thu Sep 12 21:23:44 UTC 2013
>>>>
>>>> With ANSIBLE_HOST_KEY_CHECKING=no, the results return much more quickly
>>>> and all nine hosts display the same time (within 1-2 sec anyway).
>>>>
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