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authorChocobozzz <me@florianbigard.com>2018-09-11 16:27:07 +0200
committerChocobozzz <me@florianbigard.com>2018-09-13 14:05:49 +0200
commitc48e82b5e0478434de30626d14594a97f2402e7c (patch)
treea78e5272bd0fe4f5b41831e571e02d05f1515b82 /server/lib/schedulers/videos-redundancy-scheduler.ts
parenta651038487faa838bda3ce04695b08bc65baff70 (diff)
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Basic video redundancy implementation
Diffstat (limited to 'server/lib/schedulers/videos-redundancy-scheduler.ts')
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diff --git a/server/lib/schedulers/videos-redundancy-scheduler.ts b/server/lib/schedulers/videos-redundancy-scheduler.ts
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1import { AbstractScheduler } from './abstract-scheduler'
2import { CONFIG, JOB_TTL, REDUNDANCY, SCHEDULER_INTERVALS_MS } from '../../initializers'
3import { logger } from '../../helpers/logger'
4import { VideoRedundancyStrategy } from '../../../shared/models/redundancy'
5import { VideoRedundancyModel } from '../../models/redundancy/video-redundancy'
6import { VideoFileModel } from '../../models/video/video-file'
7import { sortBy } from 'lodash'
8import { downloadWebTorrentVideo } from '../../helpers/webtorrent'
9import { join } from 'path'
10import { rename } from 'fs-extra'
11import { getServerActor } from '../../helpers/utils'
12import { sendCreateCacheFile, sendUpdateCacheFile } from '../activitypub/send'
13import { VideoModel } from '../../models/video/video'
14import { getVideoCacheFileActivityPubUrl } from '../activitypub/url'
15import { removeVideoRedundancy } from '../redundancy'
16import { isTestInstance } from '../../helpers/core-utils'
17
18export class VideosRedundancyScheduler extends AbstractScheduler {
19
20 private static instance: AbstractScheduler
21 private executing = false
22
23 protected schedulerIntervalMs = SCHEDULER_INTERVALS_MS.videosRedundancy
24
25 private constructor () {
26 super()
27 }
28
29 async execute () {
30 if (this.executing) return
31
32 this.executing = true
33
34 for (const obj of CONFIG.REDUNDANCY.VIDEOS) {
35
36 try {
37 const videoToDuplicate = await this.findVideoToDuplicate(obj.strategy)
38 if (!videoToDuplicate) continue
39
40 const videoFiles = videoToDuplicate.VideoFiles
41 videoFiles.forEach(f => f.Video = videoToDuplicate)
42
43 const videosRedundancy = await VideoRedundancyModel.getVideoFiles(obj.strategy)
44 if (this.isTooHeavy(videosRedundancy, videoFiles, obj.size)) {
45 if (!isTestInstance()) logger.info('Video %s is too big for our cache, skipping.', videoToDuplicate.url)
46 continue
47 }
48
49 logger.info('Will duplicate video %s in redundancy scheduler "%s".', videoToDuplicate.url, obj.strategy)
50
51 await this.createVideoRedundancy(obj.strategy, videoFiles)
52 } catch (err) {
53 logger.error('Cannot run videos redundancy %s.', obj.strategy, { err })
54 }
55 }
56
57 const expired = await VideoRedundancyModel.listAllExpired()
58
59 for (const m of expired) {
60 logger.info('Removing expired video %s from our redundancy system.', this.buildEntryLogId(m))
61
62 try {
63 await m.destroy()
64 } catch (err) {
65 logger.error('Cannot remove %s video from our redundancy system.', this.buildEntryLogId(m))
66 }
67 }
68
69 this.executing = false
70 }
71
72 static get Instance () {
73 return this.instance || (this.instance = new this())
74 }
75
76 private findVideoToDuplicate (strategy: VideoRedundancyStrategy) {
77 if (strategy === 'most-views') return VideoRedundancyModel.findMostViewToDuplicate(REDUNDANCY.VIDEOS.RANDOMIZED_FACTOR)
78 }
79
80 private async createVideoRedundancy (strategy: VideoRedundancyStrategy, filesToDuplicate: VideoFileModel[]) {
81 const serverActor = await getServerActor()
82
83 for (const file of filesToDuplicate) {
84 const existing = await VideoRedundancyModel.loadByFileId(file.id)
85 if (existing) {
86 logger.info('Duplicating %s - %d in videos redundancy with "%s" strategy.', file.Video.url, file.resolution, strategy)
87
88 existing.expiresOn = this.buildNewExpiration()
89 await existing.save()
90
91 await sendUpdateCacheFile(serverActor, existing)
92 continue
93 }
94
95 // We need more attributes and check if the video still exists
96 const video = await VideoModel.loadAndPopulateAccountAndServerAndTags(file.Video.id)
97 if (!video) continue
98
99 logger.info('Duplicating %s - %d in videos redundancy with "%s" strategy.', video.url, file.resolution, strategy)
100
101 const { baseUrlHttp, baseUrlWs } = video.getBaseUrls()
102 const magnetUri = video.generateMagnetUri(file, baseUrlHttp, baseUrlWs)
103
104 const tmpPath = await downloadWebTorrentVideo({ magnetUri }, JOB_TTL['video-import'])
105
106 const destPath = join(CONFIG.STORAGE.VIDEOS_DIR, video.getVideoFilename(file))
107 await rename(tmpPath, destPath)
108
109 const createdModel = await VideoRedundancyModel.create({
110 expiresOn: new Date(Date.now() + REDUNDANCY.VIDEOS.EXPIRES_AFTER_MS),
111 url: getVideoCacheFileActivityPubUrl(file),
112 fileUrl: video.getVideoFileUrl(file, CONFIG.WEBSERVER.URL),
113 strategy,
114 videoFileId: file.id,
115 actorId: serverActor.id
116 })
117 createdModel.VideoFile = file
118
119 await sendCreateCacheFile(serverActor, createdModel)
120 }
121 }
122
123 // Unused, but could be useful in the future, with a custom strategy
124 private async purgeVideosIfNeeded (videosRedundancy: VideoRedundancyModel[], filesToDuplicate: VideoFileModel[], maxSize: number) {
125 const sortedVideosRedundancy = sortBy(videosRedundancy, 'createdAt')
126
127 while (this.isTooHeavy(sortedVideosRedundancy, filesToDuplicate, maxSize)) {
128 const toDelete = sortedVideosRedundancy.shift()
129
130 const videoFile = toDelete.VideoFile
131 logger.info('Purging video %s (resolution %d) from our redundancy system.', videoFile.Video.url, videoFile.resolution)
132
133 await removeVideoRedundancy(toDelete, undefined)
134 }
135
136 return sortedVideosRedundancy
137 }
138
139 private isTooHeavy (videosRedundancy: VideoRedundancyModel[], filesToDuplicate: VideoFileModel[], maxSizeArg: number) {
140 const maxSize = maxSizeArg - this.getTotalFileSizes(filesToDuplicate)
141
142 const redundancyReducer = (previous: number, current: VideoRedundancyModel) => previous + current.VideoFile.size
143 const totalDuplicated = videosRedundancy.reduce(redundancyReducer, 0)
144
145 return totalDuplicated > maxSize
146 }
147
148 private buildNewExpiration () {
149 return new Date(Date.now() + REDUNDANCY.VIDEOS.EXPIRES_AFTER_MS)
150 }
151
152 private buildEntryLogId (object: VideoRedundancyModel) {
153 return `${object.VideoFile.Video.url}-${object.VideoFile.resolution}`
154 }
155
156 private getTotalFileSizes (files: VideoFileModel[]) {
157 const fileReducer = (previous: number, current: VideoFileModel) => previous + current.size
158
159 return files.reduce(fileReducer, 0)
160 }
161}