From 5e0d07b5e1a22264f5b47ff1b0262b6165aff245 Mon Sep 17 00:00:00 2001
From: Mike Reiche <mike.reiche@ewerk.com>
Date: Tue, 6 Jun 2023 19:15:52 +0200
Subject: [PATCH] Added `PGUSER` hint for `pg_upgrade` in troubleshooting
 section.

---
 README.md | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/README.md b/README.md
index 071340e..9b2d6f3 100644
--- a/README.md
+++ b/README.md
@@ -111,3 +111,12 @@ $ docker logs --tail 100 postgres-upgrade-testing
 $ # can now safely remove "$OLD"
 $ sudo rm -rf "$OLD"
 ```
+
+## Troubleshooting
+
+### Wrong default user
+Symptom: `connection to server on socket "/var/lib/postgresql/.s.PGSQL.50432" failed: FATAL:  role "postgres" does not exist`
+
+Symptom: `database user "postgres" is not the install user`
+
+Solution: Pass your PostgreSQL init user at `docker run -e PGUSER="your-init-user"`