The new mechanism
https://review.opendev.org/c/openstack/tripleo-ansible/+/778665
added the following command:
shell: >-
/usr/bin/rsync
-v
--delay-updates
-F
--compress
--archive
--delete
--rsync-path='sudo rsync'
--rsh='ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -i {{ tripleo_transfer_key_location }}'
{{ tripleo_transfer_src_dir_safe }}
{{ tripleo_transfer_dest_user }}@{{ hostvars_dest_host_ip }}:{{ tripleo_transfer_dest_dir_safe }}
This new mechanism calls rsync without passing --checksum. So any file that has the same size/permission and *timestamp* will not be transferred over. Now *timestamp* in this case means 1 second resolution. See also the following rsync option which explains it:
“””
--modify-window=NUM, -@ When comparing two timestamps, rsync treats the timestamps as being equal if they differ by no more than the modify-window value. The default is 0, which matches just integer seconds.
“””
This has shown to be problematic at the very least with the mariadb system transfer where only a partial list of files would be transferred, causing all kinds of data corruption and segfaults in the database being leapped.
Fix proposed to branch: master
Review: https:/