Running Postgres in GitHub Actions to test my Go API - postgresql

Question

I've set up a GitHub workflow to start a Postgres instance inside a docker container. I then execute my web API to simply prove it connects. This satisfies the workflow.
My workflow
name: Build
on:
push:
branches: [ main ]
pull_request:
branches: [ main ]
jobs:
build:
runs-on: ubuntu-latest
services:
postgres:
image: postgres:10.8
env:
POSTGRES_USER: test
POSTGRES_PASSWORD: test
POSTGRES_DB: test
POSTGRES_PORT: 5432
ports:
- 5432/tcp
options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
steps:
- uses: actions/checkout#v2
- name: Set up Go
uses: actions/setup-go#v2
with:
go-version: 1.15
- name: Run
env:
# These are the expected envs in my code
DB_HOST: localhost
DB_USER: test
DB_PASSWORD: test
DB_NAME: test
DB_PORT: 5432
DB_DIALECT: postgres
PORT: 8080
run: make run
For brevity I've trimmed irrelavent bits of code out, this is my database package:
// Config Model
type Config struct {
Host string
Name string
User string
Password string
Port string
Dialect string
}
// Open a new connection to a database
func Open(c Config) (*gorm.DB, error) {
dsn := fmt.Sprintf("host=%s port=%s dbname=%s password=%s user=%s sslmode=disable",
c.Host,
c.Port,
c.Name,
c.Password,
c.User,
)
db, err := gorm.Open(postgres.New(postgres.Config{
DriverName: c.Dialect,
DSN: dsn,
}), &gorm.Config{})
if err != nil {
return nil, fmt.Errorf("sql.Open: %v", err)
}
return db, nil
}
And this is called from my main package
func main() {
// Create Database Configuration
dbConfig := database.Config{
Host: os.Getenv("DB_HOST"),
Name: os.Getenv("DB_NAME"),
User: os.Getenv("DB_USER"),
Port: os.Getenv("DB_PORT"),
Password: os.Getenv("DB_PASSWORD"),
Dialect: os.Getenv("DB_DIALECT"),
}
// Connect to database
db, err := database.Open(dbConfig)
if err != nil {
log.Fatalf("failed to connect to database: %s", err)
}
}
The code fails to connect during the workflow with the given error:
go run -ldflags "-X main.Version=afc0042" cmd/api/main.go
2021/02/10 09:55:12 Running Version: afc0042
2021/02/10 09:55:12 failed to connect to database: sql.Open: dial tcp [::1]:5432: connect: connection refused
2021/02/10 09:55:12 /home/runner/work/database/database.go:32
[error] failed to initialize database, got error dial tcp [::1]:5432: connect: connection refused

Answer 1

you can use localhost when only you are trying to connect your server locally but as docker is not local in your machine so you can't use localhost except you are inside docker container.
try with port forward.
ports:
- 5432:5432 //update this one