CI: Split enterprise2 pipelines (#57997)

* Add publishimages_enterprise2.go file

* Add push.go

* Modify build files

* Modify starlark files

* Remove promotion pipeline

* Remove unused args

* Handle tag for custom events

pkg/build/docker/build.go

@@ -85,6 +85,11 @@ func BuildImage(version string, arch config.Architecture, grafanaDir string, use
 	var additionalDockerRepo string
 	var tags []string
 	var imageFileBase string
+	var dockerEnterprise2Repo string
+	if repo, ok := os.LookupEnv("DOCKER_ENTERPRISE2_REPO"); ok {
+		dockerEnterprise2Repo = repo
+	}
+
 	switch edition {
 	case config.EditionOSS:
 		dockerRepo = "grafana/grafana-image-tags"
@@ -94,6 +99,10 @@ func BuildImage(version string, arch config.Architecture, grafanaDir string, use
 		dockerRepo = "grafana/grafana-enterprise-image-tags"
 		imageFileBase = "grafana-enterprise"
 		editionStr = "-enterprise"
+	case config.EditionEnterprise2:
+		dockerRepo = dockerEnterprise2Repo
+		imageFileBase = "grafana-enterprise2"
+		editionStr = "-enterprise2"
 	default:
 		return []string{}, fmt.Errorf("unrecognized edition %s", edition)
 	}

pkg/build/docker/push.go

@@ -0,0 +1,62 @@
+package docker
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"os/exec"
+	"time"
+)
+
+const (
+	tries     = 3
+	sleepTime = 30
+)
+
+func PushImage(newImage string) error {
+	var err error
+	for i := 0; i < tries; i++ {
+		log.Printf("push attempt #%d...", i+1)
+		var out []byte
+		cmd := exec.Command("docker", "push", newImage)
+		cmd.Dir = "."
+		out, err = cmd.CombinedOutput()
+		if err != nil {
+			log.Printf("output: %s", out)
+			log.Printf("sleep for %d, before retrying...", sleepTime)
+			time.Sleep(sleepTime * time.Second)
+		} else {
+			log.Printf("Successfully pushed %s!", newImage)
+			break
+		}
+	}
+	if err != nil {
+		return fmt.Errorf("error pushing images to DockerHub: %q", err)
+	}
+	return nil
+}
+
+func PushManifest(manifest string) error {
+	log.Printf("Pushing Docker manifest %s...", manifest)
+
+	var err error
+	for i := 0; i < tries; i++ {
+		log.Printf("push attempt #%d...", i+1)
+		var out []byte
+		cmd := exec.Command("docker", "manifest", "push", manifest)
+		cmd.Env = append(os.Environ(), "DOCKER_CLI_EXPERIMENTAL=enabled")
+		out, err = cmd.CombinedOutput()
+		if err != nil {
+			log.Printf("output: %s", out)
+			log.Printf("sleep for %d, before retrying...", sleepTime)
+			time.Sleep(sleepTime * time.Second)
+		} else {
+			log.Printf("Successful manifest push! %s", string(out))
+			break
+		}
+	}
+	if err != nil {
+		return fmt.Errorf("failed to push manifest, err: %w", err)
+	}
+	return nil
+}