spicedb migrations are intended to be
# spicedby
yetitwo
11/15/2023, 5:04 PMspicedb migrations are intended to be backwards-compatible, right? like i should be able to run the migrations for a new spicedb version against a cluster running my old spicedb version without breaking anything?
v
vroldanbet
11/15/2023, 5:15 PMactually no, some migrations are not backward compatible, and there is no testing in place to make sure it is backward compatible
y
yetitwo
11/15/2023, 5:15 PM🤔
yetitwo
11/15/2023, 5:15 PMis that a part of why the operator is recommended?
yetitwo
11/15/2023, 5:15 PMit'll walk as needed?
yetitwo
11/15/2023, 5:16 PMi just broke our testing env because we run our deploy of a new version of spicedb right before running the associated migrations, but our migration step broke 😛
v
vroldanbet
11/15/2023, 5:16 PMyeah this is all coded into the operator, but not because of backward compatibility
y
yetitwo
11/15/2023, 5:16 PMgotcha
yetitwo
11/15/2023, 5:16 PMbleh
yetitwo
11/15/2023, 5:16 PMhopefully we get onto k8s soon -_-
v
vroldanbet
11/15/2023, 5:16 PMit's there just to orchestrate multi.phase migrations
vroldanbet
11/15/2023, 5:17 PMand if you migrate the database, and run an older spicedb, spicedb won't come up healthy
vroldanbet
11/15/2023, 5:17 PMbecause each version expects a specific datastore schema version
y
yetitwo
11/15/2023, 5:30 PMhmm... interesting
yetitwo
11/15/2023, 5:30 PMso the operator also takes care of failed deploys and rolling them back as necessary?
j
Joey
11/15/2023, 5:49 PMit won't rollout if the migration fails
Joey
11/15/2023, 5:49 PMit keeps the existing cluster running
y
yetitwo
11/15/2023, 5:57 PMright - i'm thinking of the case where the migration runs but the deploy doesn't for whatever reason
yetitwo
11/15/2023, 5:58 PMlike does the operator run
migrate <tag>j
Joey
11/15/2023, 6:15 PMit uses the version container
Joey
11/15/2023, 6:16 PMand runs 4 phase migrations if need be
Joey
11/15/2023, 6:16 PMI think your question is: how does this not break the existing running cluster?
Joey
11/15/2023, 6:16 PMthe answer is: if a migration can break the cluster, its run 4 phase
Joey
11/15/2023, 6:16 PMwith each phase being immediately back compat with the previous phase
Joey
11/15/2023, 6:16 PMbut only immediately back compat
Joey
11/15/2023, 6:17 PMand the operator will handle each phase
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