6f9c278559
# ⚠️ 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: 
104 lines
3.4 KiB
Go
104 lines
3.4 KiB
Go
// Copyright 2019 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package setting
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import (
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"net/url"
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"path/filepath"
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"strings"
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"time"
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"code.gitea.io/gitea/modules/log"
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"github.com/gobwas/glob"
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)
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// Indexer settings
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var Indexer = struct {
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IssueType string
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IssuePath string
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IssueConnStr string
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IssueConnAuth string
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IssueIndexerName string
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StartupTimeout time.Duration
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RepoIndexerEnabled bool
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RepoType string
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RepoPath string
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RepoConnStr string
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RepoIndexerName string
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MaxIndexerFileSize int64
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IncludePatterns []glob.Glob
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ExcludePatterns []glob.Glob
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ExcludeVendored bool
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}{
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IssueType: "bleve",
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IssuePath: "indexers/issues.bleve",
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IssueConnStr: "",
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IssueConnAuth: "",
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IssueIndexerName: "gitea_issues",
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RepoIndexerEnabled: false,
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RepoType: "bleve",
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RepoPath: "indexers/repos.bleve",
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RepoConnStr: "",
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RepoIndexerName: "gitea_codes",
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MaxIndexerFileSize: 1024 * 1024,
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ExcludeVendored: true,
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}
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func loadIndexerFrom(rootCfg ConfigProvider) {
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sec := rootCfg.Section("indexer")
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Indexer.IssueType = sec.Key("ISSUE_INDEXER_TYPE").MustString("bleve")
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Indexer.IssuePath = filepath.ToSlash(sec.Key("ISSUE_INDEXER_PATH").MustString(filepath.ToSlash(filepath.Join(AppDataPath, "indexers/issues.bleve"))))
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if !filepath.IsAbs(Indexer.IssuePath) {
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Indexer.IssuePath = filepath.ToSlash(filepath.Join(AppWorkPath, Indexer.IssuePath))
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}
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Indexer.IssueConnStr = sec.Key("ISSUE_INDEXER_CONN_STR").MustString(Indexer.IssueConnStr)
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if Indexer.IssueType == "meilisearch" {
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u, err := url.Parse(Indexer.IssueConnStr)
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if err != nil {
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log.Warn("Failed to parse ISSUE_INDEXER_CONN_STR: %v", err)
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u = &url.URL{}
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}
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Indexer.IssueConnAuth, _ = u.User.Password()
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u.User = nil
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Indexer.IssueConnStr = u.String()
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}
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Indexer.IssueIndexerName = sec.Key("ISSUE_INDEXER_NAME").MustString(Indexer.IssueIndexerName)
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Indexer.RepoIndexerEnabled = sec.Key("REPO_INDEXER_ENABLED").MustBool(false)
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Indexer.RepoType = sec.Key("REPO_INDEXER_TYPE").MustString("bleve")
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Indexer.RepoPath = filepath.ToSlash(sec.Key("REPO_INDEXER_PATH").MustString(filepath.ToSlash(filepath.Join(AppDataPath, "indexers/repos.bleve"))))
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if !filepath.IsAbs(Indexer.RepoPath) {
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Indexer.RepoPath = filepath.ToSlash(filepath.Join(AppWorkPath, Indexer.RepoPath))
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}
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Indexer.RepoConnStr = sec.Key("REPO_INDEXER_CONN_STR").MustString("")
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Indexer.RepoIndexerName = sec.Key("REPO_INDEXER_NAME").MustString("gitea_codes")
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Indexer.IncludePatterns = IndexerGlobFromString(sec.Key("REPO_INDEXER_INCLUDE").MustString(""))
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Indexer.ExcludePatterns = IndexerGlobFromString(sec.Key("REPO_INDEXER_EXCLUDE").MustString(""))
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Indexer.ExcludeVendored = sec.Key("REPO_INDEXER_EXCLUDE_VENDORED").MustBool(true)
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Indexer.MaxIndexerFileSize = sec.Key("MAX_FILE_SIZE").MustInt64(1024 * 1024)
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Indexer.StartupTimeout = sec.Key("STARTUP_TIMEOUT").MustDuration(30 * time.Second)
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}
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// IndexerGlobFromString parses a comma separated list of patterns and returns a glob.Glob slice suited for repo indexing
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func IndexerGlobFromString(globstr string) []glob.Glob {
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extarr := make([]glob.Glob, 0, 10)
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for _, expr := range strings.Split(strings.ToLower(globstr), ",") {
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expr = strings.TrimSpace(expr)
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if expr != "" {
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if g, err := glob.Compile(expr, '.', '/'); err != nil {
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log.Info("Invalid glob expression '%s' (skipped): %v", expr, err)
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} else {
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extarr = append(extarr, g)
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}
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}
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}
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return extarr
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}
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