pg: support host:port for backwards-compatibility

storage/sql/config.go

@@ -3,6 +3,7 @@ package sql
 import (
 	"database/sql"
 	"fmt"
+	"net"
 	"regexp"
 	"strconv"
 	"strings"
@@ -116,12 +117,24 @@ func (p *Postgres) createDataSourceName() string {
 
 	addParam("connect_timeout", strconv.Itoa(p.ConnectionTimeout))
 
-	if p.Host != "" {
-		addParam("host", dataSourceStr(p.Host))
+	// detect host:port for backwards-compatibility
+	host, port, err := net.SplitHostPort(p.Host)
+	if err != nil {
+		// not host:port, probably unix socket or bare address
+
+		host = p.Host
+
+		if p.Port != 0 {
+			port = strconv.Itoa(int(p.Port))
+		}
 	}
 
-	if p.Port != 0 {
-		addParam("port", strconv.Itoa(int(p.Port)))
+	if host != "" {
+		addParam("host", dataSourceStr(host))
+	}
+
+	if port != "" {
+		addParam("port", port)
 	}
 
 	if p.User != "" {