Add -race flag to Makefile and integration tests; fix data race in CreateTailscaleNodesInUser

.github/workflows/test-integration.yaml

@@ -101,7 +101,7 @@ jobs:
               --volume $PWD/control_logs:/tmp/control \
               --env HEADSCALE_INTEGRATION_POSTGRES=${{env.USE_POSTGRES}} \
               golang:1 \
-                go run gotest.tools/gotestsum@latest -- ./... \
+                go run gotest.tools/gotestsum@latest -- -race ./... \
                   -failfast \
                   -timeout 120m \
                   -parallel 1 \

Makefile

@@ -22,7 +22,7 @@ build:
 dev: lint test build
 
 test:
-	gotestsum -- -short -coverprofile=coverage.out ./...
+	gotestsum -- -short -race -coverprofile=coverage.out ./...
 
 test_integration:
 	docker run \
@@ -33,7 +33,7 @@ test_integration:
 		-v /var/run/docker.sock:/var/run/docker.sock \
 		-v $$PWD/control_logs:/tmp/control \
 		golang:1 \
-		go run gotest.tools/gotestsum@latest -- -failfast ./... -timeout 120m -parallel 8
+		go run gotest.tools/gotestsum@latest -- -race -failfast ./... -timeout 120m -parallel 8
 
 lint:
 	golangci-lint run --fix --timeout 10m

integration/scenario.go

@@ -327,18 +327,22 @@ func (s *Scenario) CreateTailscaleNodesInUser(
 			cert := headscale.GetCert()
 			hostname := headscale.GetHostname()
 
+			s.mu.Lock()
 			opts = append(opts,
 				tsic.WithHeadscaleTLS(cert),
 				tsic.WithHeadscaleName(hostname),
 			)
+			s.mu.Unlock()
 
 			user.createWaitGroup.Go(func() error {
+				s.mu.Lock()
 				tsClient, err := tsic.New(
 					s.pool,
 					version,
 					s.network,
 					opts...,
 				)
+				s.mu.Unlock()
 				if err != nil {
 					return fmt.Errorf(
 						"failed to create tailscale (%s) node: %w",