From 75c01645913f6dcb56b9e221654be584dbf59455 Mon Sep 17 00:00:00 2001
From: Oleksii Kysil <oleksii.kysil@gmail.com>
Date: Tue, 25 Apr 2023 16:17:47 +0300
Subject: [PATCH] PMM-9541 Fix database discover when using socket

When discovering databases and using local socket connection add
trailing "/" to the database name to omit using it as a host for
the connection.
---
 cmd/postgres_exporter/datasource.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/cmd/postgres_exporter/datasource.go b/cmd/postgres_exporter/datasource.go
index 3721e658c..c49f89bb5 100644
--- a/cmd/postgres_exporter/datasource.go
+++ b/cmd/postgres_exporter/datasource.go
@@ -75,7 +75,11 @@ func (e *Exporter) discoverDatabaseDSNs() []string {
 			}
 
 			if dsnURI != nil {
-				dsnURI.Path = databaseName
+				if dsnURI.Host == "" && strings.HasPrefix(dsnURI.Path, "/") {
+					dsnURI.Path = "/" + databaseName
+				} else {
+					dsnURI.Path = databaseName
+				}
 				dsn = dsnURI.String()
 			} else {
 				// replacing one dbname with another is complicated.