History

Kevin Carter e394318edb Use blockinfile for tripleo-ssh-known-hosts lineinfile combined with with_items was very inefficient for this task. Given that each node's hostkey is added to every other host, it resulted in O(n²) performance. Additional networks per node also worsened the problem. For example, in a 100 node deployment, with 4 networks per node, this task would need to be executed 40,000 times (100 * 100 * 4). Switching to use blockinfile brings the performance back to O(n), and also removes any dependency on the number of networks per node. This change also backports the task layout which improves general performance and functionality of the role. Change-Id: Id51d27f53abf3421c29a11065377e9303ad68d79 (cherry picked from commit 4157d7a5df083a49bfb3b1d1c7cd5f233c1930c4) Signed-off-by: Kevin Carter <kecarter@redhat.com>		2019-09-10 18:08:58 +00:00
..
defaults	Add tripleo-ssh-known-hosts role	2018-01-30 15:31:37 -05:00
handlers	Add tripleo-ssh-known-hosts role	2018-01-30 15:31:37 -05:00
meta	Add tripleo-ssh-known-hosts role	2018-01-30 15:31:37 -05:00
tasks	Use blockinfile for tripleo-ssh-known-hosts	2019-09-10 18:08:58 +00:00
README.md	Add tripleo-ssh-known-hosts role	2018-01-30 15:31:37 -05:00

README.md

tripleo-ssh-known-hosts

An Ansible role to add all SSH host keys to the host level known hosts file on all hosts.

Requirements

This section needs to be documented.

Role variables

ssh_known_hosts: -- Dict of hostname to ssh_known_hosts entries for a given host

Dependencies

None.

Example Playbook

Sample playbook to call the role:

name: Configure SSH known hosts hosts: all roles:
- tripleo-ssh-known-hosts

License

Free software: Apache License (2.0)

Author Information

OpenStack TripleO team