OpenStack host maintenance and upgrade in interaction with application on top of it

Gerrit User 22348 38728f9f5a Update patch set 3 ... Patch Set 3: Verified+1 Build succeeded (check pipeline). - openstack-tox-pep8 https://zuul.opendev.org/t/openstack/build/0f8024f7c0f149609225a21b22d89b03 : SUCCESS in 3m 43s - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/d9e95314bb084d41a4882f4f81960311 : SUCCESS in 3m 45s Patch-set: 3 Tag: autogenerated:zuul:check Label: Verified=+1		2020-04-21 04:35:48 +00:00
0607b6520e9883c74384969510626aa9913d3bb9	Update patch set 2	2020-04-21 04:30:56 +00:00