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Generate sql_exporter config files with Jsonnet

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There are quite a few benefits to this approach:

- Reduce config duplication
  - The two sql_exporter configs were super similar with just a few
    differences
- Pull SQL queries into standalone files
  - That means we could run a SQL formatter on the file in the future
  - It also means access to syntax highlighting
- In the future, run different queries for different PG versions
  - This is relevant because right now, we have queries that are failing
    on PG 17 due to catalog updates

Signed-off-by: Tristan Partin <tristan@neon.tech>
This commit is contained in:
Tristan Partin
2024-10-15 11:18:38 -05:00
committed by GitHub
parent 614c3aef72
commit cf7a596a15
72 changed files with 635 additions and 457 deletions
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6
compute/etc/sql_exporter/replication_delay_bytes.sql Normal file
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-- We use a GREATEST call here because this calculation can be negative. The
-- calculation is not atomic, meaning after we've gotten the receive LSN, the
-- replay LSN may have advanced past the receive LSN we are using for the
-- calculation.
SELECT GREATEST(0, pg_wal_lsn_diff(pg_last_wal_receive_lsn(), pg_last_wal_replay_lsn())) AS replication_delay_bytes;