This simplifies the stand-up of a sandbox:

Only 2 main Vagrant calls are now needed (`vagrant up` and `vagrant up machine1`).
This PR only updates the Vagrant Virtualbox setup. The Vagrant Libvirt and Terraform
still need to be updated.

This uses docker-compose as the entry point for standing up the stack and makes the stand-up
of the sandbox more portal. Vagrant and Terraform are only responsible for standing up infrastructure
and then running docker-compose, not for running any glue scripts.

The docker-compose calls out to single-shot services to do all the glue required to get the fully
functional Tinkerbell stack up and running. All the single-shot services are idempotent.
This increases portability and the development iteration loop. This also simplifies the required
steps needed to get a fully functioning sandbox up and running.

This is intended to help people looking to get started by getting them to a provisioned
machine quicker and more easily.

Signed-off-by: Jacob Weinstock <jakobweinstock@gmail.com>

releases/cmd/bump-version/image/image.go

@@ -0,0 +1,24 @@
+package image
+
+import "fmt"
+
+var ErrCommitTooShort = fmt.Errorf("commit to short, it needs at least 8 characters")
+
+type Image struct {
+	name string
+}
+
+// TagFromSha returns an image tag from a commit sha following the
+// convention we have in Tinkerbell
+// Commit: a7e947efc194fb0375f88cccc67f2fde5e0c85c1
+//    -> Tag: sha-a7e947ef
+func TagFromSha(commit string) (string, error) {
+	if len(commit) < 8 {
+		return "", ErrCommitTooShort
+	}
+	return "sha-" + commit[0:8], nil
+}
+
+func NewImage(name string) *Image {
+	return &Image{name: name}
+}

releases/cmd/bump-version/image/image_test.go

@@ -0,0 +1,39 @@
+package image_test
+
+import (
+	"errors"
+	"fmt"
+	"testing"
+
+	"github.com/tinkerbell/sandbox/cmd/bump-version/image"
+)
+
+func TestTagFromSha(t *testing.T) {
+	s := []struct {
+		Err    error
+		Commit string
+		Tag    string
+	}{
+		{
+			Commit: "a7e947efc194fb0375f88cccc67f2fde5e0c85c1",
+			Tag:    "sha-a7e947ef",
+		},
+		{
+			Commit: "0",
+			Err:    image.ErrCommitTooShort,
+		},
+	}
+
+	for _, v := range s {
+		t.Run(fmt.Sprintf("%s -> %s", v.Commit, v.Tag), func(t *testing.T) {
+			tag, err := image.TagFromSha(v.Commit)
+			errors.Is(err, v.Err)
+			if v.Err != err {
+				t.Error(err)
+			}
+			if tag != v.Tag {
+				t.Errorf("expected %s got %s", v.Tag, tag)
+			}
+		})
+	}
+}