Build: Fix running e2e tests for Cypress with Dagger (#116105)

pkg/build/e2e/README.md

@@ -0,0 +1,20 @@
+## Build artifacts
+
+Put the resulting tar in your `grafana` OSS path:
+```sh
+go -C grafana run ./pkg/build/cmd artifacts -a targz:enterprise:linux/amd64 --alpine-base=alpine:3.22 --tag-format='{{ .version }}-{{ .buildID }}-{{ .arch }}' --grafana-dir="${PWD}/grafana" --enterprise-dir="${PWD}/grafana-enterprise"
+```
+
+Also build the e2e test runner:
+```sh
+GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -o ./e2e-runner ./e2e/
+```
+
+And then `chmod +x ./e2e-runner`.
+
+## Running tests
+
+Reporting tests with Image Renderer:
+```sh
+go run ./pkg/build/e2e --suite=e2e/extensions/enterprise/smtp-suite --license=e2e/extensions/enterprise/license.jwt --image-renderer
+```

pkg/build/e2e/main.go

@@ -138,6 +138,10 @@ func run(ctx context.Context, cmd *cli.Command) error {
 	}
 
 	if code != 0 {
+		if stdout, _ := c.Stdout(ctx); len(stdout) > 0 {
+			log.Printf("e2e test suite stdout:\n%s", stdout)
+		}
+
 		return fmt.Errorf("e2e tests failed with exit code %d", code)
 	}
 

pkg/build/e2e/run.go

@@ -8,10 +8,10 @@ import (
 
 func RunSuite(d *dagger.Client, svc *dagger.Service, src *dagger.Directory, cache *dagger.CacheVolume, suite, runnerFlags string) *dagger.Container {
 	command := fmt.Sprintf(
-		"./e2e-runner cypress --start-grafana=false --cypress-video"+
+		"./e2e-runner cypress --browser=electron --start-grafana=false --cypress-video"+
 			" --grafana-base-url http://grafana:3001 --suite %s %s", suite, runnerFlags)
 
-	return WithYarnCache(WithGrafanaFrontend(d.Container().From("cypress/included:13.1.0"), src), cache).
+	return WithYarnCache(WithGrafanaFrontend(d.Container().From("cypress/included:14.3.2"), src), cache).
 		WithWorkdir("/src").
 		WithServiceBinding("grafana", svc).
 		WithExec([]string{"yarn", "install", "--immutable"}).

pkg/build/e2e/service.go

@@ -99,13 +99,15 @@ func GrafanaService(ctx context.Context, d *dagger.Client, opts GrafanaServiceOp
 	}
 
 	if opts.StartImageRenderer {
-		container = container.WithEnvVariable("START_IMAGE_RENDERER", "true").
-			WithExec([]string{"apt-get", "update"}).
-			WithExec([]string{"apt-get", "install", "-y", "ca-certificates"})
+		imageRendererSvc := d.Container().From("grafana/grafana-image-renderer:" + opts.ImageRendererVersion).
+			WithExposedPort(8081).
+			AsService()
 
-		if opts.ImageRendererVersion != "" {
-			container = container.WithEnvVariable("IMAGE_RENDERER_VERSION", opts.ImageRendererVersion)
-		}
+		container = container.WithServiceBinding("image-renderer", imageRendererSvc).
+			WithExec([]string{"apt-get", "update"}).
+			WithExec([]string{"apt-get", "install", "-y", "ca-certificates"}).
+			WithEnvVariable("GF_RENDERING_CALLBACK_URL", "http://grafana:3001/").
+			WithEnvVariable("GF_RENDERING_SERVER_URL", "http://image-renderer:8081/render")
 	}
 
 	// We add all GF_ environment variables to allow for overriding Grafana configuration.