Is there documentation on how to handle
# spicedbn
night
02/13/2025, 6:36 AMIs there documentation on how to handle migrations in a multi-cluster spicedb deployment? Any other potential gotchas to running a multi-cluster spicedb?
v
vroldanbet
02/13/2025, 12:08 PMwhen you say multi-cluster, you mean multiple SpiceDB clusters sharing the same underlying database, e.g. a multi-region cockroach?
vroldanbet
02/13/2025, 12:09 PMthe answer is it depends. If there is a multi-phase migration that needs to be run, then the clusters need to be coordinated. There are also migrations that are not multiphase, but that once run in tandem, lead to breaking chances in the schema (e.g. migration X creates new index, migration X+1 drops old index)
vroldanbet
02/13/2025, 12:09 PMmy recommendation: migrate each cluster one spicedb version at a time
vroldanbet
02/13/2025, 12:10 PMand check if the upgrade you are doing does not contain a multiphase migration
n
night
02/13/2025, 5:36 PMWhat do you mean by coordinated?
v
vroldanbet
02/13/2025, 6:21 PMwith coordinated I mean that you can't freely let the clusters upgrade, as one making more progress than the others will potentially impact the clusters with versions behind
vroldanbet
02/13/2025, 6:21 PMso you have to manually move the versions one by one in a coordinated fashion
vroldanbet
02/13/2025, 6:22 PMe.g. the following sequence
update cluster 1 to 1.39
update cluster 2 to 1.39
update cluster 1 to 1.40
update cluster 2 to 1.40
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