ssh module was pausing input for the
entire websocket while doing the simple 'write' operation.
Change to background the actual
logon processing,
rather than blocking what should be a fairly trivial write operation.
Main difference from EL8 is different grub strategy. To cope, capture
the uuid of new /boot and manipulate the
stub grub.cfg with the right uuid.
In EL8, the efi has the main grub, EL9 changes to have /boot host the 'real' grub,
causing us to have to modify the stub grub.
For one, remove 'non-voting' members from being leaders.
Large number of leader candidates create long delays for
converging on a valid organization. Further, some treat 'non-voting'
more roughly, inducing the worst case convergence scenario of unclean
shutdown of leader.
Convergence now happens fairly quickly for collectives with large
number of non-voting members.
During initial DB transfer, the leader would be tied up unreasonably
long handling the jsonification of a large configuration. Offload to a worker
process to allow the leader to continue operation while this intensive, rare
operation occurs.
Reliably run a reassimilation procedure for the lifetime of the leader.
This allows orphaned members to be prompted to join the correct leader.
Serialize the onboarding of a connecting member, and have redundancy more gracefully
paused. This avoids excessive waiting in lock and more deterministic timing
with respect to timeout expectations by the connecting system.
When udev is populating the disk hierarchy, it can be a long time
before the 'by-label' is specifically ready.
Wait for that specific entry to come along before continuing to
check if there's an identity image.
Unfortunately, python being python, ansible may elect to install under a
different python runtime than confluent.
In such a case, hope that the ansible python can work.
Remove eventlet as a hard requirement, as
that is unlikely to be in ansible python.
This leaves msgpack, which is unavoidable, for now. But if it's in ansible python,
it's fine.
