fix: use psycopg2 instead of psycopg2-binary to link against system libpq#370
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fix: use psycopg2 instead of psycopg2-binary to link against system libpq#370
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…ibpq psycopg2-binary bundles its own libpq 9.6, which does not support the target_session_attrs connection parameter (requires libpq >= 10). This causes Patroni replicas to log errors every second: psycopg2.ProgrammingError: invalid dsn: invalid connection option "target_session_attrs" The error originates in Patroni's rewind.py check_leader_is_not_in_recovery(), which sets target_session_attrs='read-write' for PG >= 10. Switching to psycopg2 (non-binary) compiles from source against the system's libpq-dev, which fully supports the parameter. libpq-dev is already present via the postgresql-server-dev dependency. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Apr 27, 2026
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psycopg2-binarybundles its ownlibpq 9.6, which does not support thetarget_session_attrsconnection parameter (requireslibpq >= 10).This causes Patroni replicas to log errors every second:
psycopg2.ProgrammingError: invalid dsn: invalid connection option "target_session_attrs"The error originates in Patroni's
rewind.pycheck_leader_is_not_in_recovery(), which setstarget_session_attrs='read-write'forPG >= 10.Switching to
psycopg2(non-binary) compiles from source against the system'slibpq-dev, which fully supports the parameter.libpq-devis already present via thepostgresql-server-devdependency.