Anis Elleuch e4b51235f8
upgrade: Split in two steps to ensure a stable retry (#15396)
Currently, if one server in a distributed setup fails to upgrade 
due to any reasons, it is not possible to upgrade again unless 
nodes are restarted.

To fix this, split the upgrade process into two steps :

- download the new binary on all servers
- If successful, overwrite the old binary with the new one
2022-07-25 17:49:47 -07:00
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