Use env GITEA_RUNNER_REGISTRATION_TOKEN as global runner token (#32946)

Fix #23703

When Gitea starts, it reads GITEA_RUNNER_REGISTRATION_TOKEN
or GITEA_RUNNER_REGISTRATION_TOKEN_FILE to add registration token.

services/actions/init.go

@@ -4,23 +4,68 @@
 package actions
 
 import (
+	"context"
+	"errors"
+	"fmt"
+	"os"
+	"strings"
+
+	actions_model "code.gitea.io/gitea/models/actions"
 	"code.gitea.io/gitea/modules/graceful"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/queue"
 	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/util"
 	notify_service "code.gitea.io/gitea/services/notify"
 )
 
-func Init() {
+func initGlobalRunnerToken(ctx context.Context) error {
+	// use the same env name as the runner, for consistency
+	token := os.Getenv("GITEA_RUNNER_REGISTRATION_TOKEN")
+	tokenFile := os.Getenv("GITEA_RUNNER_REGISTRATION_TOKEN_FILE")
+	if token != "" && tokenFile != "" {
+		return errors.New("both GITEA_RUNNER_REGISTRATION_TOKEN and GITEA_RUNNER_REGISTRATION_TOKEN_FILE are set, only one can be used")
+	}
+	if tokenFile != "" {
+		file, err := os.ReadFile(tokenFile)
+		if err != nil {
+			return fmt.Errorf("unable to read GITEA_RUNNER_REGISTRATION_TOKEN_FILE: %w", err)
+		}
+		token = strings.TrimSpace(string(file))
+	}
+	if token == "" {
+		return nil
+	}
+
+	if len(token) < 32 {
+		return errors.New("GITEA_RUNNER_REGISTRATION_TOKEN must be at least 32 random characters")
+	}
+
+	existing, err := actions_model.GetRunnerToken(ctx, token)
+	if err != nil && !errors.Is(err, util.ErrNotExist) {
+		return fmt.Errorf("unable to check existing token: %w", err)
+	}
+	if existing != nil {
+		if !existing.IsActive {
+			log.Warn("The token defined by GITEA_RUNNER_REGISTRATION_TOKEN is already invalidated, please use the latest one from web UI")
+		}
+		return nil
+	}
+	_, err = actions_model.NewRunnerTokenWithValue(ctx, 0, 0, token)
+	return err
+}
+
+func Init(ctx context.Context) error {
 	if !setting.Actions.Enabled {
-		return
+		return nil
 	}
 
 	jobEmitterQueue = queue.CreateUniqueQueue(graceful.GetManager().ShutdownContext(), "actions_ready_job", jobEmitterQueueHandler)
 	if jobEmitterQueue == nil {
-		log.Fatal("Unable to create actions_ready_job queue")
+		return errors.New("unable to create actions_ready_job queue")
 	}
 	go graceful.GetManager().RunWithCancel(jobEmitterQueue)
 
 	notify_service.RegisterNotifier(NewNotifier())
+	return initGlobalRunnerToken(ctx)
 }

services/actions/init_test.go

@@ -0,0 +1,80 @@
+// Copyright 2024 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package actions
+
+import (
+	"os"
+	"testing"
+
+	actions_model "code.gitea.io/gitea/models/actions"
+	"code.gitea.io/gitea/models/db"
+	"code.gitea.io/gitea/models/unittest"
+	"code.gitea.io/gitea/modules/util"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestMain(m *testing.M) {
+	unittest.MainTest(m, &unittest.TestOptions{
+		FixtureFiles: []string{"action_runner_token.yml"},
+	})
+	os.Exit(m.Run())
+}
+
+func TestInitToken(t *testing.T) {
+	assert.NoError(t, unittest.PrepareTestDatabase())
+
+	t.Run("NoToken", func(t *testing.T) {
+		_, _ = db.Exec(db.DefaultContext, "DELETE FROM action_runner_token")
+		t.Setenv("GITEA_RUNNER_REGISTRATION_TOKEN", "")
+		t.Setenv("GITEA_RUNNER_REGISTRATION_TOKEN_FILE", "")
+		err := initGlobalRunnerToken(db.DefaultContext)
+		require.NoError(t, err)
+		notEmpty, err := db.IsTableNotEmpty(&actions_model.ActionRunnerToken{})
+		require.NoError(t, err)
+		assert.False(t, notEmpty)
+	})
+
+	t.Run("EnvToken", func(t *testing.T) {
+		tokenValue, _ := util.CryptoRandomString(32)
+		t.Setenv("GITEA_RUNNER_REGISTRATION_TOKEN", tokenValue)
+		t.Setenv("GITEA_RUNNER_REGISTRATION_TOKEN_FILE", "")
+		err := initGlobalRunnerToken(db.DefaultContext)
+		require.NoError(t, err)
+		token := unittest.AssertExistsAndLoadBean(t, &actions_model.ActionRunnerToken{Token: tokenValue})
+		assert.True(t, token.IsActive)
+
+		// init with the same token again, should not create a new token
+		err = initGlobalRunnerToken(db.DefaultContext)
+		require.NoError(t, err)
+		token2 := unittest.AssertExistsAndLoadBean(t, &actions_model.ActionRunnerToken{Token: tokenValue})
+		assert.Equal(t, token.ID, token2.ID)
+		assert.True(t, token.IsActive)
+	})
+
+	t.Run("EnvFileToken", func(t *testing.T) {
+		tokenValue, _ := util.CryptoRandomString(32)
+		f := t.TempDir() + "/token"
+		_ = os.WriteFile(f, []byte(tokenValue), 0o644)
+		t.Setenv("GITEA_RUNNER_REGISTRATION_TOKEN", "")
+		t.Setenv("GITEA_RUNNER_REGISTRATION_TOKEN_FILE", f)
+		err := initGlobalRunnerToken(db.DefaultContext)
+		require.NoError(t, err)
+		token := unittest.AssertExistsAndLoadBean(t, &actions_model.ActionRunnerToken{Token: tokenValue})
+		assert.True(t, token.IsActive)
+
+		// if the env token is invalidated by another new token, then it shouldn't be active anymore
+		_, err = actions_model.NewRunnerToken(db.DefaultContext, 0, 0)
+		require.NoError(t, err)
+		token = unittest.AssertExistsAndLoadBean(t, &actions_model.ActionRunnerToken{Token: tokenValue})
+		assert.False(t, token.IsActive)
+	})
+
+	t.Run("InvalidToken", func(t *testing.T) {
+		t.Setenv("GITEA_RUNNER_REGISTRATION_TOKEN", "abc")
+		err := initGlobalRunnerToken(db.DefaultContext)
+		assert.ErrorContains(t, err, "must be at least")
+	})
+}