forgejo/tests/test_utils.go
wxiaoguang 6f9c278559
Rewrite queue (#24505)
# ⚠️ 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)
2023-05-08 19:49:59 +08:00

252 lines
8.4 KiB
Go

// Copyright 2017 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
//nolint:forbidigo
package tests
import (
"context"
"database/sql"
"fmt"
"os"
"path"
"path/filepath"
"testing"
"code.gitea.io/gitea/models/db"
packages_model "code.gitea.io/gitea/models/packages"
"code.gitea.io/gitea/models/unittest"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/graceful"
"code.gitea.io/gitea/modules/log"
repo_module "code.gitea.io/gitea/modules/repository"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/storage"
"code.gitea.io/gitea/modules/testlogger"
"code.gitea.io/gitea/modules/util"
"code.gitea.io/gitea/routers"
"github.com/stretchr/testify/assert"
)
func exitf(format string, args ...interface{}) {
fmt.Printf(format+"\n", args...)
os.Exit(1)
}
func InitTest(requireGitea bool) {
giteaRoot := base.SetupGiteaRoot()
if giteaRoot == "" {
exitf("Environment variable $GITEA_ROOT not set")
}
setting.AppWorkPath = giteaRoot
if requireGitea {
giteaBinary := "gitea"
if setting.IsWindows {
giteaBinary += ".exe"
}
setting.AppPath = path.Join(giteaRoot, giteaBinary)
if _, err := os.Stat(setting.AppPath); err != nil {
exitf("Could not find gitea binary at %s", setting.AppPath)
}
}
giteaConf := os.Getenv("GITEA_CONF")
if giteaConf == "" {
// By default, use sqlite.ini for testing, then IDE like GoLand can start the test process with debugger.
// It's easier for developers to debug bugs step by step with a debugger.
// Notice: when doing "ssh push", Gitea executes sub processes, debugger won't work for the sub processes.
giteaConf = "tests/sqlite.ini"
_ = os.Setenv("GITEA_CONF", giteaConf)
fmt.Printf("Environment variable $GITEA_CONF not set, use default: %s\n", giteaConf)
if !setting.EnableSQLite3 {
exitf(`sqlite3 requires: import _ "github.com/mattn/go-sqlite3" or -tags sqlite,sqlite_unlock_notify`)
}
}
setting.IsInTesting = true
if !path.IsAbs(giteaConf) {
setting.CustomConf = path.Join(giteaRoot, giteaConf)
} else {
setting.CustomConf = giteaConf
}
setting.SetCustomPathAndConf("", "", "")
unittest.InitSettings()
setting.Repository.DefaultBranch = "master" // many test code still assume that default branch is called "master"
_ = util.RemoveAll(repo_module.LocalCopyPath())
if err := git.InitFull(context.Background()); err != nil {
log.Fatal("git.InitOnceWithSync: %v", err)
}
setting.LoadDBSetting()
if err := storage.Init(); err != nil {
exitf("Init storage failed: %v", err)
}
switch {
case setting.Database.Type.IsMySQL():
connType := "tcp"
if len(setting.Database.Host) > 0 && setting.Database.Host[0] == '/' { // looks like a unix socket
connType = "unix"
}
db, err := sql.Open("mysql", fmt.Sprintf("%s:%s@%s(%s)/",
setting.Database.User, setting.Database.Passwd, connType, setting.Database.Host))
defer db.Close()
if err != nil {
log.Fatal("sql.Open: %v", err)
}
if _, err = db.Exec(fmt.Sprintf("CREATE DATABASE IF NOT EXISTS %s", setting.Database.Name)); err != nil {
log.Fatal("db.Exec: %v", err)
}
case setting.Database.Type.IsPostgreSQL():
var db *sql.DB
var err error
if setting.Database.Host[0] == '/' {
db, err = sql.Open("postgres", fmt.Sprintf("postgres://%s:%s@/%s?sslmode=%s&host=%s",
setting.Database.User, setting.Database.Passwd, setting.Database.Name, setting.Database.SSLMode, setting.Database.Host))
} else {
db, err = sql.Open("postgres", fmt.Sprintf("postgres://%s:%s@%s/%s?sslmode=%s",
setting.Database.User, setting.Database.Passwd, setting.Database.Host, setting.Database.Name, setting.Database.SSLMode))
}
defer db.Close()
if err != nil {
log.Fatal("sql.Open: %v", err)
}
dbrows, err := db.Query(fmt.Sprintf("SELECT 1 FROM pg_database WHERE datname = '%s'", setting.Database.Name))
if err != nil {
log.Fatal("db.Query: %v", err)
}
defer dbrows.Close()
if !dbrows.Next() {
if _, err = db.Exec(fmt.Sprintf("CREATE DATABASE %s", setting.Database.Name)); err != nil {
log.Fatal("db.Exec: CREATE DATABASE: %v", err)
}
}
// Check if we need to setup a specific schema
if len(setting.Database.Schema) == 0 {
break
}
db.Close()
if setting.Database.Host[0] == '/' {
db, err = sql.Open("postgres", fmt.Sprintf("postgres://%s:%s@/%s?sslmode=%s&host=%s",
setting.Database.User, setting.Database.Passwd, setting.Database.Name, setting.Database.SSLMode, setting.Database.Host))
} else {
db, err = sql.Open("postgres", fmt.Sprintf("postgres://%s:%s@%s/%s?sslmode=%s",
setting.Database.User, setting.Database.Passwd, setting.Database.Host, setting.Database.Name, setting.Database.SSLMode))
}
// This is a different db object; requires a different Close()
defer db.Close()
if err != nil {
log.Fatal("sql.Open: %v", err)
}
schrows, err := db.Query(fmt.Sprintf("SELECT 1 FROM information_schema.schemata WHERE schema_name = '%s'", setting.Database.Schema))
if err != nil {
log.Fatal("db.Query: %v", err)
}
defer schrows.Close()
if !schrows.Next() {
// Create and setup a DB schema
if _, err = db.Exec(fmt.Sprintf("CREATE SCHEMA %s", setting.Database.Schema)); err != nil {
log.Fatal("db.Exec: CREATE SCHEMA: %v", err)
}
}
case setting.Database.Type.IsMSSQL():
host, port := setting.ParseMSSQLHostPort(setting.Database.Host)
db, err := sql.Open("mssql", fmt.Sprintf("server=%s; port=%s; database=%s; user id=%s; password=%s;",
host, port, "master", setting.Database.User, setting.Database.Passwd))
if err != nil {
log.Fatal("sql.Open: %v", err)
}
if _, err := db.Exec(fmt.Sprintf("If(db_id(N'%s') IS NULL) BEGIN CREATE DATABASE %s; END;", setting.Database.Name, setting.Database.Name)); err != nil {
log.Fatal("db.Exec: %v", err)
}
defer db.Close()
}
routers.GlobalInitInstalled(graceful.GetManager().HammerContext())
}
func PrepareTestEnv(t testing.TB, skip ...int) func() {
t.Helper()
ourSkip := 2
if len(skip) > 0 {
ourSkip += skip[0]
}
deferFn := PrintCurrentTest(t, ourSkip)
// load database fixtures
assert.NoError(t, unittest.LoadFixtures())
// load git repo fixtures
assert.NoError(t, util.RemoveAll(setting.RepoRootPath))
assert.NoError(t, unittest.CopyDir(path.Join(filepath.Dir(setting.AppPath), "tests/gitea-repositories-meta"), setting.RepoRootPath))
ownerDirs, err := os.ReadDir(setting.RepoRootPath)
if err != nil {
assert.NoError(t, err, "unable to read the new repo root: %v\n", err)
}
for _, ownerDir := range ownerDirs {
if !ownerDir.Type().IsDir() {
continue
}
repoDirs, err := os.ReadDir(filepath.Join(setting.RepoRootPath, ownerDir.Name()))
if err != nil {
assert.NoError(t, err, "unable to read the new repo root: %v\n", err)
}
for _, repoDir := range repoDirs {
_ = os.MkdirAll(filepath.Join(setting.RepoRootPath, ownerDir.Name(), repoDir.Name(), "objects", "pack"), 0o755)
_ = os.MkdirAll(filepath.Join(setting.RepoRootPath, ownerDir.Name(), repoDir.Name(), "objects", "info"), 0o755)
_ = os.MkdirAll(filepath.Join(setting.RepoRootPath, ownerDir.Name(), repoDir.Name(), "refs", "heads"), 0o755)
_ = os.MkdirAll(filepath.Join(setting.RepoRootPath, ownerDir.Name(), repoDir.Name(), "refs", "tag"), 0o755)
}
}
// load LFS object fixtures
// (LFS storage can be on any of several backends, including remote servers, so we init it with the storage API)
lfsFixtures, err := storage.NewStorage("", storage.LocalStorageConfig{Path: path.Join(filepath.Dir(setting.AppPath), "tests/gitea-lfs-meta")})
assert.NoError(t, err)
assert.NoError(t, storage.Clean(storage.LFS))
assert.NoError(t, lfsFixtures.IterateObjects("", func(path string, _ storage.Object) error {
_, err := storage.Copy(storage.LFS, path, lfsFixtures, path)
return err
}))
// clear all package data
assert.NoError(t, db.TruncateBeans(db.DefaultContext,
&packages_model.Package{},
&packages_model.PackageVersion{},
&packages_model.PackageFile{},
&packages_model.PackageBlob{},
&packages_model.PackageProperty{},
&packages_model.PackageBlobUpload{},
&packages_model.PackageCleanupRule{},
))
assert.NoError(t, storage.Clean(storage.Packages))
return deferFn
}
func PrintCurrentTest(t testing.TB, skip ...int) func() {
if len(skip) == 1 {
skip = []int{skip[0] + 1}
}
return testlogger.PrintCurrentTest(t, skip...)
}
// Printf takes a format and args and prints the string to os.Stdout
func Printf(format string, args ...interface{}) {
testlogger.Printf(format, args...)
}
func init() {
log.Register("test", testlogger.NewTestLogger)
}