Bug 1756342

If the user wants to re-run the step on purpose, they will have to first remove a flag file which prevents the re-run. The error message on 2nd run looks like:

TASK [tripleo-transfer : fail if flag file exists] *****************************
Thursday 26 September 2019  03:51:11 -0400 (0:00:00.635)       0:01:02.822 **** 
fatal: [undercloud -> 192.168.24.12]: FAILED! => {"changed": false, "msg": "Data transfer to '/var/lib/mysql' was prevented by flag file existence. This means the transfer was attempted before and another one would overwrite the data. If this is desired, remove the flag file at '/var/lib/tripleo/transfer-flags/var-lib-mysql' and re-run the data transfer.\n"}

Working in tht:
(undercloud) [stack@undercloud-0 ~]$ rpm -qa | grep tripleo-heat-templates
openstack-tripleo-heat-templates-10.6.2-0.20191202200455.41d9f8a.el8ost.noarch


TASK [tripleo-transfer : fetch the archive] ************************************
changed: [undercloud -> 192.168.24.23] => {"changed": true, "checksum": "ac50f0405a30a4fb2491f34adb4fd6ecfa027fe7", "dest": "/var/lib/mistral/tripleo-transfer/controller-0/v
ar/lib/mysql.tar.gz", "md5sum": "2f5a8d07f9f15b6cacc6e594837b6b40", "remote_checksum": "ac50f0405a30a4fb2491f34adb4fd6ecfa027fe7", "remote_md5sum": null}
Friday 13 December 2019  05:15:57 -0500 (0:00:11.198)       0:04:04.495 ******* 


TASK [tripleo-transfer : remove tempfile] **************************************
changed: [undercloud -> 192.168.24.23] => {"changed": true, "path": "/tmp/ansible.tripleo-transfer.Q415OA", "state": "absent"}
Friday 13 December 2019  05:15:58 -0500 (0:00:00.593)       0:04:05.089 ******* 

TASK [tripleo-transfer : check flag file existence in destination host] ********
ok: [undercloud -> 192.168.24.16] => {"changed": false, "stat": {"atime": 1576198890.726, "attr_flags": "", "attributes": [], "block_size": 4096, "blocks": 0, "charset": "bi
nary", "checksum": "da39a3ee5e6b4b0d3255bfef95601890afd80709", "ctime": 1576198890.726, "dev": 64514, "device_type": 0, "executable": false, "exists": true, "gid": 0, "gr_name": "root", "inode": 92730831, "isblk": false, "ischr": false, "isdir": false, "isfifo": false, "isgid": false, "islnk": false, "isreg": true, "issock": false, "isuid": fal
se, "mimetype": "inode/x-empty", "mode": "0644", "mtime": 1576198890.726, "nlink": 1, "path": "/var/lib/tripleo/transfer-flags/var-lib-mysql", "pw_name": "root", "readable":
 true, "rgrp": true, "roth": true, "rusr": true, "size": 0, "uid": 0, "version": "366940920", "wgrp": false, "woth": false, "writeable": true, "wusr": true, "xgrp": false, "xoth": false, "xusr": false}}
Friday 13 December 2019  05:15:58 -0500 (0:00:00.892)       0:04:05.981 ******* 

TASK [tripleo-transfer : fail if flag file exists] *****************************
fatal: [undercloud -> 192.168.24.16]: FAILED! => {"changed": false, "msg": "Data transfer to '/var/lib/mysql' was prevented by flag file existence. This means the transfer was attempted before and another one would overwrite the data. If this is desired, remove the flag file at '/var/lib/tripleo/transfer-flags/var-lib-mysql' and re-run the data
 transfer.\n"}

NO MORE HOSTS LEFT *************************************************************

PLAY RECAP *********************************************************************

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Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2020:0643