Podman and libpod bindings

go.mod

module example.com

go 1.14

require (
	github.com/containers/libpod v1.9.3 // indirect
	github.com/containers/podman/v2 v2.1.1 // indirect
)

main.go

package main

import (
	"context"
	"fmt"
	"os"

	"github.com/containers/podman/v2/pkg/bindings"
	"github.com/containers/podman/v2/pkg/bindings/containers"
	"github.com/containers/podman/v2/pkg/bindings/images"
	"github.com/containers/podman/v2/pkg/domain/entities"
	"github.com/containers/podman/v2/pkg/specgen"
)

func main() {
	fmt.Println("Looking for a postgreSQL running container...")
	dbDockerName := "postgres"
	// Connection to podman API
	sock_dir := os.Getenv("XDG_RUNTIME_DIR")
	socket := "unix:" + sock_dir + "/podman/podman.sock"
	connText, err := bindings.NewConnection(context.Background(), socket)
	if err != nil {
		fmt.Println(err)
		os.Exit(1)
	}

	// Container list
	var latestContainers = 3
	containerLatestList, err := containers.List(connText, nil, nil, &latestContainers, nil, nil)
	if err != nil {
		fmt.Println(err)
		os.Exit(1)
	}

	var cont_id string

	for cont := 0; cont <= len(containerLatestList)-1; cont++ {
		if containerLatestList[cont].Names[0] == dbDockerName {
			cont_id = containerLatestList[cont].ID
			fmt.Printf("Found container with name postgres: %s\n", cont_id)
		}
	}

	if cont_id == "" {
		// Pull Postgres image
		rawImage := "docker.io/library/postgres:12.3-alpine"
		fmt.Println("Pulling Postgres image...")
		_, err = images.Pull(connText, rawImage, entities.ImagePullOptions{})
		if err != nil {
			fmt.Println(err)
			os.Exit(1)
		}

		s := specgen.NewSpecGenerator(rawImage, false)
		s.Name = dbDockerName
		s.Terminal = true
		s.Env = map[string]string{
			"POSTGRES_PASSWORD": "admin",
			"POSTGRES_USER":     "admin",
		}
		_, err := containers.CreateWithSpec(connText, s)
		if err != nil {
			fmt.Println(err)
			os.Exit(1)
		}
	}

	// Container start
	fmt.Println("Starting Postgres container...")
	err = containers.Start(connText, dbDockerName, nil)
	if err != nil {
		fmt.Println(err)
		os.Exit(1)
	}

	// Container inspect
	ctrData, err := containers.Inspect(connText, dbDockerName, nil)
	if err != nil {
		fmt.Println(err)
		os.Exit(1)
	}
	fmt.Printf("Container uses image %s\n", ctrData.ImageName)
	fmt.Printf("Container running status is %s\n", ctrData.State.Status)
}