Just built and installed ansible-1.5-0.git201312162123.fc20.noarch.rpm
ssh-alt Running well except Hitting the following issue:
ignore-errors in loop are failing with ssh_alt
The test I did with ssh_alt during its development was not showing the
issue.
How to reproduce:
have a Play with one task like:
- name: Make sure the following services are turned off
service: name={{ item }} enabled=no state=stopped
with_items: disabled_services_list_var
ignore_errors: True
tags:
- service_disable
and a variable like
disabled_services_list_var:
- 'blk-availability'
- 'certmonger'
- 'cpuspeed'
Note: that certmonger rpm is not installed in the target system
run the play with -c ssh_alt gives:
TASK: [Make sure the following services are turned off]
***********************
changed: [targetsystem] => (item=blk-availability)
fatal: [targetsystem] => SSH Error: data could not be sent to the
remote host. Make sure this host can be reached over ssh
FATAL: all hosts have already failed -- aborting
running without ssh_alt gives:
TASK: [Make sure the following services are turned off]
***********************
changed: [targetsystem] => (item=blk-availability)
failed: [targetsystem] => (item=certmonger) => {"failed": true,
"item": "certmonger"}
msg: cannot find 'service' binary or init script for service, possible
typo in service name?, aborting
...ignoring
ok: [targetsystem] => (item=cpuspeed)
PLAY RECAP
********************************************************************
targetsystem : ok=2 changed=1 unreachable=0 failed=0
2013/12/16 James Tanner <tanner...@gmail.com <mailto:tanner...@gmail.com>>
ssh_alt has been merged in again with numerous fixes:
https://github.com/ansible/ansible/pull/5247
We have seen impressive performance increases from using this
connection method and I would like to thank Jerome Wagner for all
the work he has put into it.
Per Michael’s previous email, please share your results.
On Dec 10, 2013, at 7:25 PM, Michael DeHaan
<mich...@ansibleworks.com <mailto:mich...@ansibleworks.com>> wrote:
Ok this was breaking async, we will get it working shortly!
On Tue, Dec 10, 2013 at 6:52 PM, Michael DeHaan
<mich...@ansibleworks.com <mailto:mich...@ansibleworks.com>> wrote:
Hi all,
A recent discussion on the development list introduced some
great patches from Jerome Wagner, which have streamlined the
number of SSH operations Ansible has to perform for a certain
class of tasks. This makes the ssh implementation even
faster (and especially so with Control Persist on, which we
encourage!).
This works by not transferring files and creating tempdirs in
many situations where a module doesn't require file transfer,
rather, by just pushing the module over the SSH channel and
running it directly without saving it to disk.
It seems to be good for a 40-50% network performance upgrade
in a basic case where some steps require file transfer and
others don't. It may be much more for many playbooks.
It won't be very noticeable if your network is already great,
but if it's not, or you're managing across the open internet,
it's pretty nice.
Naturally, this will do nothing for package update time,
which is where you'll be spending most of your management
cycles in most playbooks anyway.
Rather than directly import this code for testing on the
development branch, we've checked it in temporarily as
"ssh_alt.py". I'd be curious if you had regular playbooks
you used if you could test this version to:
(A) see if there are any errors
(B) what sort of performance differences you see between -c
ssh and -c ssh_alt. (Note: if your playbook has hard coded
the connection in it, please remove the connection: line
before testing, and be sure you are not using accelerate
mode, as this will invalidate the tests).
(C) if possible, what data you get for accelerate mode.
Please don't share local test (127.0.0.1) numbers, and after
we get a few replies, we'll mostly just be interested in
hearing about any errors you might have encountered.
Remember you need to use -c ssh_alt to activate this for now.
Thanks very much and thanks for a very cool patch set Jerome!
--
Michael DeHaan <mich...@ansibleworks.com
<mailto:mich...@ansibleworks.com>>
CTO, AnsibleWorks, Inc.
http://www.ansibleworks.com/
--
Michael DeHaan <mich...@ansibleworks.com
<mailto:mich...@ansibleworks.com>>
CTO, AnsibleWorks, Inc.
http://www.ansibleworks.com/
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