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# ⚠️ Breaking Many deprecated queue config options are removed (actually, they should have been removed in 1.18/1.19). If you see the fatal message when starting Gitea: "Please update your app.ini to remove deprecated config options", please follow the error messages to remove these options from your app.ini. Example: ``` 2023/05/06 19:39:22 [E] Removed queue option: `[indexer].ISSUE_INDEXER_QUEUE_TYPE`. Use new options in `[queue.issue_indexer]` 2023/05/06 19:39:22 [E] Removed queue option: `[indexer].UPDATE_BUFFER_LEN`. Use new options in `[queue.issue_indexer]` 2023/05/06 19:39:22 [F] Please update your app.ini to remove deprecated config options ``` Many options in `[queue]` are are dropped, including: `WRAP_IF_NECESSARY`, `MAX_ATTEMPTS`, `TIMEOUT`, `WORKERS`, `BLOCK_TIMEOUT`, `BOOST_TIMEOUT`, `BOOST_WORKERS`, they can be removed from app.ini. # The problem The old queue package has some legacy problems: * complexity: I doubt few people could tell how it works. * maintainability: Too many channels and mutex/cond are mixed together, too many different structs/interfaces depends each other. * stability: due to the complexity & maintainability, sometimes there are strange bugs and difficult to debug, and some code doesn't have test (indeed some code is difficult to test because a lot of things are mixed together). * general applicability: although it is called "queue", its behavior is not a well-known queue. * scalability: it doesn't seem easy to make it work with a cluster without breaking its behaviors. It came from some very old code to "avoid breaking", however, its technical debt is too heavy now. It's a good time to introduce a better "queue" package. # The new queue package It keeps using old config and concept as much as possible. * It only contains two major kinds of concepts: * The "base queue": channel, levelqueue, redis * They have the same abstraction, the same interface, and they are tested by the same testing code. * The "WokerPoolQueue", it uses the "base queue" to provide "worker pool" function, calls the "handler" to process the data in the base queue. * The new code doesn't do "PushBack" * Think about a queue with many workers, the "PushBack" can't guarantee the order for re-queued unhandled items, so in new code it just does "normal push" * The new code doesn't do "pause/resume" * The "pause/resume" was designed to handle some handler's failure: eg: document indexer (elasticsearch) is down * If a queue is paused for long time, either the producers blocks or the new items are dropped. * The new code doesn't do such "pause/resume" trick, it's not a common queue's behavior and it doesn't help much. * If there are unhandled items, the "push" function just blocks for a few seconds and then re-queue them and retry. * The new code doesn't do "worker booster" * Gitea's queue's handlers are light functions, the cost is only the go-routine, so it doesn't make sense to "boost" them. * The new code only use "max worker number" to limit the concurrent workers. * The new "Push" never blocks forever * Instead of creating more and more blocking goroutines, return an error is more friendly to the server and to the end user. There are more details in code comments: eg: the "Flush" problem, the strange "code.index" hanging problem, the "immediate" queue problem. Almost ready for review. TODO: * [x] add some necessary comments during review * [x] add some more tests if necessary * [x] update documents and config options * [x] test max worker / active worker * [x] re-run the CI tasks to see whether any test is flaky * [x] improve the `handleOldLengthConfiguration` to provide more friendly messages * [x] fine tune default config values (eg: length?) ## Code coverage: ![image](https://user-images.githubusercontent.com/2114189/236620635-55576955-f95d-4810-b12f-879026a3afdf.png)
254 lines
8.0 KiB
Go
254 lines
8.0 KiB
Go
// Copyright 2021 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package unittest
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import (
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"context"
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"fmt"
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"log"
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"os"
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"path/filepath"
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"strings"
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"testing"
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"code.gitea.io/gitea/models/db"
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system_model "code.gitea.io/gitea/models/system"
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"code.gitea.io/gitea/modules/auth/password/hash"
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"code.gitea.io/gitea/modules/base"
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"code.gitea.io/gitea/modules/git"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/storage"
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"code.gitea.io/gitea/modules/util"
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"github.com/stretchr/testify/assert"
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"xorm.io/xorm"
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"xorm.io/xorm/names"
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)
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// giteaRoot a path to the gitea root
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var (
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giteaRoot string
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fixturesDir string
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)
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// FixturesDir returns the fixture directory
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func FixturesDir() string {
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return fixturesDir
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}
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func fatalTestError(fmtStr string, args ...interface{}) {
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_, _ = fmt.Fprintf(os.Stderr, fmtStr, args...)
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os.Exit(1)
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}
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// InitSettings initializes config provider and load common setttings for tests
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func InitSettings(extraConfigs ...string) {
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setting.Init(&setting.Options{
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AllowEmpty: true,
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ExtraConfig: strings.Join(extraConfigs, "\n"),
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})
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if err := setting.PrepareAppDataPath(); err != nil {
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log.Fatalf("Can not prepare APP_DATA_PATH: %v", err)
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}
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// register the dummy hash algorithm function used in the test fixtures
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_ = hash.Register("dummy", hash.NewDummyHasher)
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setting.PasswordHashAlgo, _ = hash.SetDefaultPasswordHashAlgorithm("dummy")
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}
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// TestOptions represents test options
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type TestOptions struct {
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GiteaRootPath string
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FixtureFiles []string
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SetUp func() error // SetUp will be executed before all tests in this package
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TearDown func() error // TearDown will be executed after all tests in this package
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}
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// MainTest a reusable TestMain(..) function for unit tests that need to use a
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// test database. Creates the test database, and sets necessary settings.
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func MainTest(m *testing.M, testOpts *TestOptions) {
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setting.SetCustomPathAndConf("", "", "")
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InitSettings()
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var err error
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giteaRoot = testOpts.GiteaRootPath
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fixturesDir = filepath.Join(testOpts.GiteaRootPath, "models", "fixtures")
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var opts FixturesOptions
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if len(testOpts.FixtureFiles) == 0 {
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opts.Dir = fixturesDir
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} else {
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for _, f := range testOpts.FixtureFiles {
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if len(f) != 0 {
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opts.Files = append(opts.Files, filepath.Join(fixturesDir, f))
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}
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}
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}
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if err = CreateTestEngine(opts); err != nil {
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fatalTestError("Error creating test engine: %v\n", err)
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}
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setting.AppURL = "https://try.gitea.io/"
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setting.RunUser = "runuser"
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setting.SSH.User = "sshuser"
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setting.SSH.BuiltinServerUser = "builtinuser"
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setting.SSH.Port = 3000
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setting.SSH.Domain = "try.gitea.io"
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setting.Database.Type = "sqlite3"
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setting.Repository.DefaultBranch = "master" // many test code still assume that default branch is called "master"
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repoRootPath, err := os.MkdirTemp(os.TempDir(), "repos")
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if err != nil {
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fatalTestError("TempDir: %v\n", err)
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}
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setting.RepoRootPath = repoRootPath
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appDataPath, err := os.MkdirTemp(os.TempDir(), "appdata")
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if err != nil {
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fatalTestError("TempDir: %v\n", err)
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}
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setting.AppDataPath = appDataPath
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setting.AppWorkPath = testOpts.GiteaRootPath
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setting.StaticRootPath = testOpts.GiteaRootPath
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setting.GravatarSource = "https://secure.gravatar.com/avatar/"
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setting.Attachment.Storage.Path = filepath.Join(setting.AppDataPath, "attachments")
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setting.LFS.Storage.Path = filepath.Join(setting.AppDataPath, "lfs")
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setting.Avatar.Storage.Path = filepath.Join(setting.AppDataPath, "avatars")
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setting.RepoAvatar.Storage.Path = filepath.Join(setting.AppDataPath, "repo-avatars")
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setting.RepoArchive.Storage.Path = filepath.Join(setting.AppDataPath, "repo-archive")
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setting.Packages.Storage.Path = filepath.Join(setting.AppDataPath, "packages")
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setting.Actions.Storage.Path = filepath.Join(setting.AppDataPath, "actions_log")
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setting.Git.HomePath = filepath.Join(setting.AppDataPath, "home")
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setting.IncomingEmail.ReplyToAddress = "incoming+%{token}@localhost"
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if err = storage.Init(); err != nil {
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fatalTestError("storage.Init: %v\n", err)
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}
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if err = system_model.Init(db.DefaultContext); err != nil {
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fatalTestError("models.Init: %v\n", err)
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}
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if err = util.RemoveAll(repoRootPath); err != nil {
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fatalTestError("util.RemoveAll: %v\n", err)
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}
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if err = CopyDir(filepath.Join(testOpts.GiteaRootPath, "tests", "gitea-repositories-meta"), setting.RepoRootPath); err != nil {
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fatalTestError("util.CopyDir: %v\n", err)
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}
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if err = git.InitFull(context.Background()); err != nil {
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fatalTestError("git.Init: %v\n", err)
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}
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ownerDirs, err := os.ReadDir(setting.RepoRootPath)
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if err != nil {
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fatalTestError("unable to read the new repo root: %v\n", err)
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}
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for _, ownerDir := range ownerDirs {
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if !ownerDir.Type().IsDir() {
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continue
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}
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repoDirs, err := os.ReadDir(filepath.Join(setting.RepoRootPath, ownerDir.Name()))
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if err != nil {
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fatalTestError("unable to read the new repo root: %v\n", err)
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}
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for _, repoDir := range repoDirs {
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_ = os.MkdirAll(filepath.Join(setting.RepoRootPath, ownerDir.Name(), repoDir.Name(), "objects", "pack"), 0o755)
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_ = os.MkdirAll(filepath.Join(setting.RepoRootPath, ownerDir.Name(), repoDir.Name(), "objects", "info"), 0o755)
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_ = os.MkdirAll(filepath.Join(setting.RepoRootPath, ownerDir.Name(), repoDir.Name(), "refs", "heads"), 0o755)
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_ = os.MkdirAll(filepath.Join(setting.RepoRootPath, ownerDir.Name(), repoDir.Name(), "refs", "tag"), 0o755)
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}
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}
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if testOpts.SetUp != nil {
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if err := testOpts.SetUp(); err != nil {
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fatalTestError("set up failed: %v\n", err)
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}
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}
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exitStatus := m.Run()
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if testOpts.TearDown != nil {
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if err := testOpts.TearDown(); err != nil {
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fatalTestError("tear down failed: %v\n", err)
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}
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}
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if err = util.RemoveAll(repoRootPath); err != nil {
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fatalTestError("util.RemoveAll: %v\n", err)
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}
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if err = util.RemoveAll(appDataPath); err != nil {
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fatalTestError("util.RemoveAll: %v\n", err)
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}
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os.Exit(exitStatus)
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}
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// FixturesOptions fixtures needs to be loaded options
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type FixturesOptions struct {
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Dir string
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Files []string
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}
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// CreateTestEngine creates a memory database and loads the fixture data from fixturesDir
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func CreateTestEngine(opts FixturesOptions) error {
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x, err := xorm.NewEngine("sqlite3", "file::memory:?cache=shared&_txlock=immediate")
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if err != nil {
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if strings.Contains(err.Error(), "unknown driver") {
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return fmt.Errorf(`sqlite3 requires: import _ "github.com/mattn/go-sqlite3" or -tags sqlite,sqlite_unlock_notify%s%w`, "\n", err)
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}
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return err
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}
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x.SetMapper(names.GonicMapper{})
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db.SetDefaultEngine(context.Background(), x)
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if err = db.SyncAllTables(); err != nil {
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return err
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}
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switch os.Getenv("GITEA_UNIT_TESTS_LOG_SQL") {
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case "true", "1":
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x.ShowSQL(true)
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}
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return InitFixtures(opts)
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}
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// PrepareTestDatabase load test fixtures into test database
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func PrepareTestDatabase() error {
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return LoadFixtures()
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}
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// PrepareTestEnv prepares the environment for unit tests. Can only be called
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// by tests that use the above MainTest(..) function.
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func PrepareTestEnv(t testing.TB) {
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assert.NoError(t, PrepareTestDatabase())
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assert.NoError(t, util.RemoveAll(setting.RepoRootPath))
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metaPath := filepath.Join(giteaRoot, "tests", "gitea-repositories-meta")
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assert.NoError(t, CopyDir(metaPath, setting.RepoRootPath))
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ownerDirs, err := os.ReadDir(setting.RepoRootPath)
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assert.NoError(t, err)
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for _, ownerDir := range ownerDirs {
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if !ownerDir.Type().IsDir() {
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continue
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}
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repoDirs, err := os.ReadDir(filepath.Join(setting.RepoRootPath, ownerDir.Name()))
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assert.NoError(t, err)
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for _, repoDir := range repoDirs {
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_ = os.MkdirAll(filepath.Join(setting.RepoRootPath, ownerDir.Name(), repoDir.Name(), "objects", "pack"), 0o755)
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_ = os.MkdirAll(filepath.Join(setting.RepoRootPath, ownerDir.Name(), repoDir.Name(), "objects", "info"), 0o755)
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_ = os.MkdirAll(filepath.Join(setting.RepoRootPath, ownerDir.Name(), repoDir.Name(), "refs", "heads"), 0o755)
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_ = os.MkdirAll(filepath.Join(setting.RepoRootPath, ownerDir.Name(), repoDir.Name(), "refs", "tag"), 0o755)
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}
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}
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base.SetupGiteaRoot() // Makes sure GITEA_ROOT is set
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}
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