Backup PGSQL in a container using Golang docker SDK - docker

Question

On host machine I have docker-compose stack that have a service called
transactions-db
its a PostgreSQL container
I want to create a backup service using Golang to be able to create .sql to be used for restores later on
docker-compose.yml for backup service
version: "3.8"
services:
backup-service:
build:
context: .
dockerfile: Dockerfile
image: backup-service
container_name: backup-service
volumes:
- .:/app
- /var/run/docker.sock:/var/run/docker.sock
main.go
package main
import (
"context"
"fmt"
"os"
)
func main () {
result, err := ExecuteCommandOnContainer(context.Background(), ConnectToDocker(), "transactions-db")
if err != nil {
fmt.Println(err)
os.Exit(1)
}
fmt.Println(result.ExitCode)
}
docker.go
package main
import (
"context"
"fmt"
"github.com/docker/docker/api/types"
"github.com/docker/docker/client"
)
func ConnectToDocker() *client.Client {
cli, err := client.NewClientWithOpts()
if err != nil {
fmt .Println(err)
}
return cli
}
func ExecuteCommandOnContainer(ctx context.Context, cli *client.Client, containerID string) (types.ContainerExecInspect, error) {
command := []string{"pg_dumpall", "-c", "-U", "user", "|", "gzip", ">", "backup/tr.sql"}
execConfig := types.ExecConfig{
Tty: true,
AttachStdin: true,
AttachStderr: true,
AttachStdout: true,
Cmd: command,
}
create, err := cli.ContainerExecCreate(ctx, containerID, execConfig)
if err != nil {
fmt .Println(err)
}
inspect, err := cli.ContainerExecInspect(ctx, create.ID)
if err != nil {
fmt .Println(err)
}
return inspect, nil
}
basically nothing happens when I run this code. I only get the following:
backup-service | 0
backup-service exited with code 0
I tried to normally run: go run .
I've also tried using my docker-compose up
same result
note: I've tested listing container it works but when trying to execute a command nothing