I am trying to connect to postgres database in AWS RDS in a Go program using github.com/jackc/pgx/v5
package, but the following error occurs:
failed to connect to `host=xxxxx.xxxxxxx.us-east-1.rds.amazonaws.com user=golangpg database=golangpg`: server error (FATAL: database "golangpg" does not exist (SQLSTATE 3D000))
exit status 1
Even its explicit that database not exist is the error but I have already created the RDS database and I also can connect to that database through pgAdmin as well. But when I tried to connect in my Go code, I got the above mentioned error.
I have checked the following points
- Security group is allowing all traffic through 5432 port
- Public access is enabled in the RDS
- Able to connect through pgAdmin to the same database.
package database
import (
"context"
"fmt"
"os"
"strconv"
"github.com/jackc/pgx/v5"
"github.com/joho/godotenv"
)
func PGConnection() *pgx.Conn {
envErr := godotenv.Load()
if envErr != nil {
fmt.Println("Error in loading .env file, ", envErr)
}
host := os.Getenv("DB_URL")
port := os.Getenv("DB_PORT")
user := os.Getenv("DB_USERNAME")
password := os.Getenv("DB_PASSWORD")
dbname := os.Getenv("DB_NAME")
portInt, er := strconv.Atoi(port)
if er != nil {
fmt.Println("Error in converting string to number", er)
}
var err error
pgConnString := fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=%s sslmode=require", host, portInt, user, password, dbname)
pgConn, err := pgx.Connect(context.Background(), pgConnString)
if err != nil {
fmt.Printf("Unable to connection to database: n%vn", err)
os.Exit(1)
} else {
fmt.Println("Database connection establised to db ", dbname)
}
return pgConn
}
var Connection *pgx.Conn = PGConnection()
What could be the error here. Even from pgAdmin I can able to create tables but couldn’t connect from my Go code.
2
Answers
Try
database=%s
instead ofdbname=%s
, and pass necessary certs when usingsslmode=require
.The issue is because
database "golangpg" does not exist
in your RDS PostgreSQL host.RDS identifier != database name
Here I re-create your setup:
PostgreSQL RDS
Executed the same code and got the same error:
The reason is
database "golangdb" does not exist
doesn’t exist in my PostgreSQL RDS.Connect to the database host and list the available databases.
This is also why using
dbname := "postgres"
works, because the database exist in the host.Create new database
Retry go code