[202205][db_migrator] Add migration of FLEX_COUNTER_DELAY_STATUS during 1911->2205 upgrade + fast-reboot. Add UT. #2870
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What I did
Add migration of
FLEX_COUNTER_DELAY_STATUS
attribute of config_dbFLEX_COUNTER_TABLE
during theSONiC to SONiC upgrade + fast-reboot
from older versions201911 -> 202205
.This change is required for the
fast-reboot
procedure because without it the counters will be created during the init flow which will waste a lot of resources and cause data plane degradation of more than 30 seconds.How I did it
Modify the
db_migrator.py
.How to verify it
Add UT.
Previous command output (if the output of a command-line utility has changed)
New command output (if the output of a command-line utility has changed)