[ansible-project] How do I know pipelining is turned on?

[Yuri Niyazov]

I am trying to provision a machine on EC2 (I am provisioning it to be a
management node for a larger fleet of machines, this is why it has Vagrant
and Ansible installed on it)

https://github.com/yn/provisioner


If I understand correctly, then the following line:

ansible.raw_arguments = ['-e pipelining=True']

should reduce the number of operations that ansible performs.

AFAICT the number of operations is the same with that line and without, and
the output log between the two provisions looks identical, except for
different temporary filenames and time-date differences.

I double checked, and the machine that I am provisioning doesn't have
"requiretty" in the /etc/sudoers file. You can test it yourself, the AMI is
public.

Any help is appreciated!

[Brian Coca]

No idea what ansible.raw_arguments = ['-e pipelining=True'] does, but
setting pipeline to true in the ansible.cfg enables it ONLY for
connection plugins that support it.

This setting is not intended to have ansible execute less operations,
just allows it to use a streaming pipe instead of having to scp/sftp
everything over.

[Yuri Niyazov]

I created a github gist: https://gist.github.com/yn/4efebad9d72835318ab1

In it, you will see the results of executing two ansible-playbook commands:

ansible-playbook --user=ubuntu --connection=ssh --limit='p2'
--inventory-file=/Users/yn/code/mine/provisioner/.vagrant/provisioners/ansible/inventory
-vvvv -e pipelining=False playbook.yml

and

ansible-playbook --user=ubuntu --connection=ssh --limit='p2'
--inventory-file=/Users/yn/code/mine/provisioner/.vagrant/provisioners/ansible/inventory
-vvvv -e pipelining=True playbook.yml

If I understand the documentation correctly, the -e option allows one to
override the configuration variables from ansible.cfg on the command line.

The outputs look identical except for various IDs that are generated
randomly. How does one know if ansible is using the streaming pipe or not?

[Brian Coca]

wrong, -e is 'extra vars', it does not override configurations, it
overrides variable values, pipelining is not a variable value.

[Yuri Niyazov]

thanks!

Post by Brian Coca
wrong, -e is 'extra vars', it does not override configurations, it
overrides variable values, pipelining is not a variable value.
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Brian Coca
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