In trying to figure out why I was unable to run
all of the test_migrations tests, I realized we need
to fix and clean up our unicode declarations.
Specifically, the way I found this was my local mysql
install was defaulted to using 4 Byte Unicode characters,
however some of our fields are 255 characters, which do not
fit inside of InnoDB tables.
They do, however fit with the "utf8" storage alias, which is
presently short for UTF8MB3, as opposed to UTF8MB4 which is
what my local database server was configured for. Because this
was in opportunistic tests, I wasn't able to really sort out
what was going on and thought we needed to shorten the fields.
In reality, it turns out we never defined the allocations
table to use UTF8 and Innodb for storage.
Storage engine wise, this is not a big deal, but may mean a
DBA will one day need to dump and reload the allocation table
of a deployment.
Character set wise... It is not great, but there is not a good
way for us to do this programatically. In my opinion, the chance
of an issue being encountered by an operator is unlikely, which
out weighs the risk and impact of dumping the entire table,
deleting the table, recreating the table with the updated schema
and then repopulating the entries. Of course, if operators are not
using allocations, then it really doesn't matter for them.
Along the way, I discovered we had used the "UTF8" type alias,
which may change one day, which would break Ironic. As such,
I've also updated the definitions used to create databases
and updated our documentation.
Recommended reading:
https://docs.sqlalchemy.org/en/14/dialects/mysql.html#unicodehttps://dev.mysql.com/doc/refman/8.0/en/charset-unicode-utf8mb4.html
Story: 2010348
Task: 46492
Change-Id: I4103152489bf61e2d614eaa297da858f7b2112a3
1435a15ce3