server/lib/schedulers/videos-redundancy-scheduler.ts

   1 import { AbstractScheduler } from './abstract-scheduler'
   2 import { CONFIG, HLS_REDUNDANCY_DIRECTORY, REDUNDANCY, VIDEO_IMPORT_TIMEOUT } from '../../initializers'
   3 import { logger } from '../../helpers/logger'
   4 import { VideosRedundancy } from '../../../shared/models/redundancy'
   5 import { VideoRedundancyModel } from '../../models/redundancy/video-redundancy'
   6 import { VideoFileModel } from '../../models/video/video-file'
   7 import { downloadWebTorrentVideo } from '../../helpers/webtorrent'
   8 import { join } from 'path'
   9 import { move } from 'fs-extra'
  10 import { getServerActor } from '../../helpers/utils'
  11 import { sendCreateCacheFile, sendUpdateCacheFile } from '../activitypub/send'
  12 import { getVideoCacheFileActivityPubUrl, getVideoCacheStreamingPlaylistActivityPubUrl } from '../activitypub/url'
  13 import { removeVideoRedundancy } from '../redundancy'
  14 import { getOrCreateVideoAndAccountAndChannel } from '../activitypub'
  15 import { VideoStreamingPlaylistModel } from '../../models/video/video-streaming-playlist'
  16 import { VideoModel } from '../../models/video/video'
  17 import { downloadPlaylistSegments } from '../hls'
  18
  19 type CandidateToDuplicate = {
  20   redundancy: VideosRedundancy,
  21   video: VideoModel,
  22   files: VideoFileModel[],
  23   streamingPlaylists: VideoStreamingPlaylistModel[]
  24 }
  25
  26 export class VideosRedundancyScheduler extends AbstractScheduler {
  27
  28   private static instance: AbstractScheduler
  29
  30   protected schedulerIntervalMs = CONFIG.REDUNDANCY.VIDEOS.CHECK_INTERVAL
  31
  32   private constructor () {
  33     super()
  34   }
  35
  36   protected async internalExecute () {
  37     for (const redundancyConfig of CONFIG.REDUNDANCY.VIDEOS.STRATEGIES) {
  38       logger.info('Running redundancy scheduler for strategy %s.', redundancyConfig.strategy)
  39
  40       try {
  41         const videoToDuplicate = await this.findVideoToDuplicate(redundancyConfig)
  42         if (!videoToDuplicate) continue
  43
  44         const candidateToDuplicate = {
  45           video: videoToDuplicate,
  46           redundancy: redundancyConfig,
  47           files: videoToDuplicate.VideoFiles,
  48           streamingPlaylists: videoToDuplicate.VideoStreamingPlaylists
  49         }
  50
  51         await this.purgeCacheIfNeeded(candidateToDuplicate)
  52
  53         if (await this.isTooHeavy(candidateToDuplicate)) {
  54           logger.info('Video %s is too big for our cache, skipping.', videoToDuplicate.url)
  55           continue
  56         }
  57
  58         logger.info('Will duplicate video %s in redundancy scheduler "%s".', videoToDuplicate.url, redundancyConfig.strategy)
  59
  60         await this.createVideoRedundancies(candidateToDuplicate)
  61       } catch (err) {
  62         logger.error('Cannot run videos redundancy %s.', redundancyConfig.strategy, { err })
  63       }
  64     }
  65
  66     await this.extendsLocalExpiration()
  67
  68     await this.purgeRemoteExpired()
  69   }
  70
  71   static get Instance () {
  72     return this.instance || (this.instance = new this())
  73   }
  74
  75   private async extendsLocalExpiration () {
  76     const expired = await VideoRedundancyModel.listLocalExpired()
  77
  78     for (const redundancyModel of expired) {
  79       try {
  80         const redundancyConfig = CONFIG.REDUNDANCY.VIDEOS.STRATEGIES.find(s => s.strategy === redundancyModel.strategy)
  81         const candidate = {
  82           redundancy: redundancyConfig,
  83           video: null,
  84           files: [],
  85           streamingPlaylists: []
  86         }
  87
  88         // If the administrator disabled the redundancy or decreased the cache size, remove this redundancy instead of extending it
  89         if (!redundancyConfig || await this.isTooHeavy(candidate)) {
  90           logger.info('Destroying redundancy %s because the cache size %s is too heavy.', redundancyModel.url, redundancyModel.strategy)
  91           await removeVideoRedundancy(redundancyModel)
  92         } else {
  93           await this.extendsRedundancy(redundancyModel)
  94         }
  95       } catch (err) {
  96         logger.error(
  97           'Cannot extend or remove expiration of %s video from our redundancy system.', this.buildEntryLogId(redundancyModel),
  98           { err }
  99         )
 100       }
 101     }
 102   }
 103
 104   private async extendsRedundancy (redundancyModel: VideoRedundancyModel) {
 105     const redundancy = CONFIG.REDUNDANCY.VIDEOS.STRATEGIES.find(s => s.strategy === redundancyModel.strategy)
 106     // Redundancy strategy disabled, remove our redundancy instead of extending expiration
 107     if (!redundancy) await removeVideoRedundancy(redundancyModel)
 108
 109     await this.extendsExpirationOf(redundancyModel, redundancy.minLifetime)
 110   }
 111
 112   private async purgeRemoteExpired () {
 113     const expired = await VideoRedundancyModel.listRemoteExpired()
 114
 115     for (const redundancyModel of expired) {
 116       try {
 117         await removeVideoRedundancy(redundancyModel)
 118       } catch (err) {
 119         logger.error('Cannot remove redundancy %s from our redundancy system.', this.buildEntryLogId(redundancyModel))
 120       }
 121     }
 122   }
 123
 124   private findVideoToDuplicate (cache: VideosRedundancy) {
 125     if (cache.strategy === 'most-views') {
 126       return VideoRedundancyModel.findMostViewToDuplicate(REDUNDANCY.VIDEOS.RANDOMIZED_FACTOR)
 127     }
 128
 129     if (cache.strategy === 'trending') {
 130       return VideoRedundancyModel.findTrendingToDuplicate(REDUNDANCY.VIDEOS.RANDOMIZED_FACTOR)
 131     }
 132
 133     if (cache.strategy === 'recently-added') {
 134       const minViews = cache.minViews
 135       return VideoRedundancyModel.findRecentlyAddedToDuplicate(REDUNDANCY.VIDEOS.RANDOMIZED_FACTOR, minViews)
 136     }
 137   }
 138
 139   private async createVideoRedundancies (data: CandidateToDuplicate) {
 140     const video = await this.loadAndRefreshVideo(data.video.url)
 141
 142     if (!video) {
 143       logger.info('Video %s we want to duplicate does not existing anymore, skipping.', data.video.url)
 144
 145       return
 146     }
 147
 148     for (const file of data.files) {
 149       const existingRedundancy = await VideoRedundancyModel.loadLocalByFileId(file.id)
 150       if (existingRedundancy) {
 151         await this.extendsRedundancy(existingRedundancy)
 152
 153         continue
 154       }
 155
 156       await this.createVideoFileRedundancy(data.redundancy, video, file)
 157     }
 158
 159     for (const streamingPlaylist of data.streamingPlaylists) {
 160       const existingRedundancy = await VideoRedundancyModel.loadLocalByStreamingPlaylistId(streamingPlaylist.id)
 161       if (existingRedundancy) {
 162         await this.extendsRedundancy(existingRedundancy)
 163
 164         continue
 165       }
 166
 167       await this.createStreamingPlaylistRedundancy(data.redundancy, video, streamingPlaylist)
 168     }
 169   }
 170
 171   private async createVideoFileRedundancy (redundancy: VideosRedundancy, video: VideoModel, file: VideoFileModel) {
 172     file.Video = video
 173
 174     const serverActor = await getServerActor()
 175
 176     logger.info('Duplicating %s - %d in videos redundancy with "%s" strategy.', video.url, file.resolution, redundancy.strategy)
 177
 178     const { baseUrlHttp, baseUrlWs } = video.getBaseUrls()
 179     const magnetUri = video.generateMagnetUri(file, baseUrlHttp, baseUrlWs)
 180
 181     const tmpPath = await downloadWebTorrentVideo({ magnetUri }, VIDEO_IMPORT_TIMEOUT)
 182
 183     const destPath = join(CONFIG.STORAGE.REDUNDANCY_DIR, video.getVideoFilename(file))
 184     await move(tmpPath, destPath)
 185
 186     const createdModel = await VideoRedundancyModel.create({
 187       expiresOn: this.buildNewExpiration(redundancy.minLifetime),
 188       url: getVideoCacheFileActivityPubUrl(file),
 189       fileUrl: video.getVideoRedundancyUrl(file, CONFIG.WEBSERVER.URL),
 190       strategy: redundancy.strategy,
 191       videoFileId: file.id,
 192       actorId: serverActor.id
 193     })
 194
 195     createdModel.VideoFile = file
 196
 197     await sendCreateCacheFile(serverActor, video, createdModel)
 198
 199     logger.info('Duplicated %s - %d -> %s.', video.url, file.resolution, createdModel.url)
 200   }
 201
 202   private async createStreamingPlaylistRedundancy (redundancy: VideosRedundancy, video: VideoModel, playlist: VideoStreamingPlaylistModel) {
 203     playlist.Video = video
 204
 205     const serverActor = await getServerActor()
 206
 207     logger.info('Duplicating %s streaming playlist in videos redundancy with "%s" strategy.', video.url, redundancy.strategy)
 208
 209     const destDirectory = join(HLS_REDUNDANCY_DIRECTORY, video.uuid)
 210     await downloadPlaylistSegments(playlist.playlistUrl, destDirectory, VIDEO_IMPORT_TIMEOUT)
 211
 212     const createdModel = await VideoRedundancyModel.create({
 213       expiresOn: this.buildNewExpiration(redundancy.minLifetime),
 214       url: getVideoCacheStreamingPlaylistActivityPubUrl(video, playlist),
 215       fileUrl: playlist.getVideoRedundancyUrl(CONFIG.WEBSERVER.URL),
 216       strategy: redundancy.strategy,
 217       videoStreamingPlaylistId: playlist.id,
 218       actorId: serverActor.id
 219     })
 220
 221     createdModel.VideoStreamingPlaylist = playlist
 222
 223     await sendCreateCacheFile(serverActor, video, createdModel)
 224
 225     logger.info('Duplicated playlist %s -> %s.', playlist.playlistUrl, createdModel.url)
 226   }
 227
 228   private async extendsExpirationOf (redundancy: VideoRedundancyModel, expiresAfterMs: number) {
 229     logger.info('Extending expiration of %s.', redundancy.url)
 230
 231     const serverActor = await getServerActor()
 232
 233     redundancy.expiresOn = this.buildNewExpiration(expiresAfterMs)
 234     await redundancy.save()
 235
 236     await sendUpdateCacheFile(serverActor, redundancy)
 237   }
 238
 239   private async purgeCacheIfNeeded (candidateToDuplicate: CandidateToDuplicate) {
 240     while (this.isTooHeavy(candidateToDuplicate)) {
 241       const redundancy = candidateToDuplicate.redundancy
 242       const toDelete = await VideoRedundancyModel.loadOldestLocalThatAlreadyExpired(redundancy.strategy, redundancy.minLifetime)
 243       if (!toDelete) return
 244
 245       await removeVideoRedundancy(toDelete)
 246     }
 247   }
 248
 249   private async isTooHeavy (candidateToDuplicate: CandidateToDuplicate) {
 250     const maxSize = candidateToDuplicate.redundancy.size
 251
 252     const totalDuplicated = await VideoRedundancyModel.getTotalDuplicated(candidateToDuplicate.redundancy.strategy)
 253     const totalWillDuplicate = totalDuplicated + this.getTotalFileSizes(candidateToDuplicate.files, candidateToDuplicate.streamingPlaylists)
 254
 255     return totalWillDuplicate > maxSize
 256   }
 257
 258   private buildNewExpiration (expiresAfterMs: number) {
 259     return new Date(Date.now() + expiresAfterMs)
 260   }
 261
 262   private buildEntryLogId (object: VideoRedundancyModel) {
 263     if (object.VideoFile) return `${object.VideoFile.Video.url}-${object.VideoFile.resolution}`
 264
 265     return `${object.VideoStreamingPlaylist.playlistUrl}`
 266   }
 267
 268   private getTotalFileSizes (files: VideoFileModel[], playlists: VideoStreamingPlaylistModel[]) {
 269     const fileReducer = (previous: number, current: VideoFileModel) => previous + current.size
 270
 271     return files.reduce(fileReducer, 0) * playlists.length
 272   }
 273
 274   private async loadAndRefreshVideo (videoUrl: string) {
 275     // We need more attributes and check if the video still exists
 276     const getVideoOptions = {
 277       videoObject: videoUrl,
 278       syncParam: { likes: false, dislikes: false, shares: false, comments: false, thumbnail: false, refreshVideo: true },
 279       fetchType: 'all' as 'all'
 280     }
 281     const { video } = await getOrCreateVideoAndAccountAndChannel(getVideoOptions)
 282
 283     return video
 284   }
 285 }