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fix(compute_ctl): reload config before applying spec (#12551)

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## Problem

If we have catalog update AND a pageserver migration batched in a single
spec, we will not be able to apply the spec (running the SQL) because
the compute is not attached to the right pageserver and we are not able
to read anything if we don't pick up the latest pageserver connstring.
This is not a case for now because cplane always schedules shard split /
pageserver migrations with `skip_pg_catalog_updates` (I suppose).

Context:
https://databricks.slack.com/archives/C09254R641L/p1752163559259399?thread_ts=1752160163.141149&cid=C09254R641L

With this fix, backpressure will likely not be able to affect
reconfigurations.

## Summary of changes

Do `pg_reload_conf` before we apply specs in SQL.

---------

Signed-off-by: Alex Chi Z <chi@neon.tech>
This commit is contained in:
Alex Chi Z.
2025-07-10 14:02:54 -04:00
committed by GitHub
parent dcdfe80bf0
commit 13b5e7b26f
1 changed files with 3 additions and 2 deletions
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5
compute_tools/src/compute.rs
View File

@@ -1805,6 +1805,8 @@ impl ComputeNode {
tls_config,
)?;
self.pg_reload_conf()?;
if !spec.skip_pg_catalog_updates {
let max_concurrent_connections = spec.reconfigure_concurrency;
// Temporarily reset max_cluster_size in config
@@ -1824,10 +1826,9 @@ impl ComputeNode {
Ok(())
})?;
self.pg_reload_conf()?;
}
self.pg_reload_conf()?;
let unknown_op = "unknown".to_string();
let op_id = spec.operation_uuid.as_ref().unwrap_or(&unknown_op);
info!(