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I'm running into problems when using pgstac with separate reader and writer hosts (in my case an Aurora cluster). Search endpoints return an error similar to the following:
cannot execute SELECT FOR UPDATE in a read-only transaction
Ported from stac-utils/stac-fastapi#370.
Original Issue:
I'm running into problems when using pgstac with separate reader and writer hosts (in my case an Aurora cluster). Search endpoints return an error similar to the following:
The issue appears to be that the SQL functions defined by pgstac for searching perform operations that require write access (select for update, create temp table, etc). But, the search endpoints connect to the DB through the
readpool
https://github.com/stac-utils/stac-fastapi/blob/5dc8e0eb63d9cc07663968ed5ed9505e753bf298/stac_fastapi/pgstac/stac_fastapi/pgstac/core.py#L119-L120
This is not a problem when a single host is used for both read and write, as in the docker compose yaml. https://github.com/stac-utils/stac-fastapi/blob/5dc8e0eb63d9cc07663968ed5ed9505e753bf298/docker-compose.yml#L47-L48
When
POSTGRES_HOST_READER
points to a host that is truly read-only, however, this becomes a problem.The text was updated successfully, but these errors were encountered: