27162032768
77%

Ran 08 Jun 2026 07:46PM UTC

Jobs 2

Files 126

Run time 1min

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Committed 08 Jun 2026 07:34PM UTC coverage: 76.471% (+0.09%) from 76.381%

Build # 27162032768

Build Type

push

github

Committed by

web-flow

Commit Message

fix: auto-detect ipv6 from metadata db hostname (#1027)

## What kind of change does this PR introduce?

Updates runtime config to auto-detect IP version from the metadata DB
hostname, so it can work out of the box for ipv6 hosts, achieving parity
with how we handle tenant DBs, and for someone migrating from pgbouncer
without having them touch new knobs.

## What is the current behavior?

Supavisor couldn't start up when its `DATABASE_URL` pointed at an
IPv6-only hostname (like fly.io's internal dns). It would fail on
`:nxdomain` errors.

The IP version is configurable via the `SUPAVISOR_DB_IP_VERSION` env var
(defaults to ipv4), but ideally can be auto-detected (what this PR aims
to do).

## What is the new behavior?

We already had the necessary helper that we used to resolve tenant DBs.
Reused the same to set for our metadata db as well. I have tested and
verified the behavior on some test deployments on fly.io with a postgres
instance on a `.internal` hostname. It works.

## Additional context

Closes #314

---------

Signed-off-by: Snehil Shah <snehilshah.989@gmail.com>
Co-authored-by: felipe stival <14948182+v0idpwn@users.noreply.github.com>

Coverage Stats

2548 of 3332 relevant lines covered (76.47%)

55219.75 hits per line

Coverage Regressions

Lines	Coverage	∆	File
1	75.82	-1.1%	lib/supavisor/peep_storage.ex
1	88.54	-1.04%	lib/supavisor/monitoring/prom_ex.ex
1	93.85	-1.54%	lib/supavisor/circuit_breaker/sliding_window.ex

Jobs

ID	Job ID	Ran	Files	Coverage
1	run-integration - 27162032768.1	08 Jun 2026 07:46PM UTC	126	41.27	GitHub Action Run
2	run-tests - 27162032768.2	08 Jun 2026 07:48PM UTC	126	75.39	GitHub Action Run

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