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

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import { move } from 'fs-extra'
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import { join } from 'path'
import { getServerActor } from '@server/models/application/application'
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import { TrackerModel } from '@server/models/server/tracker'
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import { VideoModel } from '@server/models/video/video'
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import {
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MStreamingPlaylist,
MStreamingPlaylistFiles,
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MStreamingPlaylistVideo,
MVideoAccountLight,
MVideoFile,
MVideoFileVideo,
MVideoRedundancyFileVideo,
MVideoRedundancyStreamingPlaylistVideo,
MVideoRedundancyVideo,
MVideoWithAllFiles
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} from '@server/types/models'
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import { VideosRedundancyStrategy } from '../../../shared/models/redundancy'
import { logger } from '../../helpers/logger'
import { downloadWebTorrentVideo, generateMagnetUri } from '../../helpers/webtorrent'
import { CONFIG } from '../../initializers/config'
import { HLS_REDUNDANCY_DIRECTORY, REDUNDANCY, VIDEO_IMPORT_TIMEOUT } from '../../initializers/constants'
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import { VideoRedundancyModel } from '../../models/redundancy/video-redundancy'
import { sendCreateCacheFile, sendUpdateCacheFile } from '../activitypub/send'
import { getLocalVideoCacheFileActivityPubUrl, getLocalVideoCacheStreamingPlaylistActivityPubUrl } from '../activitypub/url'
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import { getOrCreateAPVideo } from '../activitypub/videos'
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import { downloadPlaylistSegments } from '../hls'
import { removeVideoRedundancy } from '../redundancy'
import { generateHLSRedundancyUrl, generateWebTorrentRedundancyUrl } from '../video-paths'
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import { AbstractScheduler } from './abstract-scheduler'
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type CandidateToDuplicate = {
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redundancy: VideosRedundancyStrategy
video: MVideoWithAllFiles
files: MVideoFile[]
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streamingPlaylists: MStreamingPlaylistFiles[]
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}
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function isMVideoRedundancyFileVideo (
o: MVideoRedundancyFileVideo | MVideoRedundancyStreamingPlaylistVideo
): o is MVideoRedundancyFileVideo {
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return !!(o as MVideoRedundancyFileVideo).VideoFile
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}
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export class VideosRedundancyScheduler extends AbstractScheduler {
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private static instance: VideosRedundancyScheduler
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protected schedulerIntervalMs = CONFIG.REDUNDANCY.VIDEOS.CHECK_INTERVAL
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private constructor () {
super()
}
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async createManualRedundancy (videoId: number) {
const videoToDuplicate = await VideoModel.loadWithFiles(videoId)
if (!videoToDuplicate) {
logger.warn('Video to manually duplicate %d does not exist anymore.', videoId)
return
}
return this.createVideoRedundancies({
video: videoToDuplicate,
redundancy: null,
files: videoToDuplicate.VideoFiles,
streamingPlaylists: videoToDuplicate.VideoStreamingPlaylists
})
}
protected async internalExecute () {
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for (const redundancyConfig of CONFIG.REDUNDANCY.VIDEOS.STRATEGIES) {
logger.info('Running redundancy scheduler for strategy %s.', redundancyConfig.strategy)
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try {
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const videoToDuplicate = await this.findVideoToDuplicate(redundancyConfig)
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if (!videoToDuplicate) continue
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const candidateToDuplicate = {
video: videoToDuplicate,
redundancy: redundancyConfig,
files: videoToDuplicate.VideoFiles,
streamingPlaylists: videoToDuplicate.VideoStreamingPlaylists
}
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await this.purgeCacheIfNeeded(candidateToDuplicate)
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if (await this.isTooHeavy(candidateToDuplicate)) {
logger.info('Video %s is too big for our cache, skipping.', videoToDuplicate.url)
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continue
}
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logger.info('Will duplicate video %s in redundancy scheduler "%s".', videoToDuplicate.url, redundancyConfig.strategy)
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await this.createVideoRedundancies(candidateToDuplicate)
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} catch (err) {
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logger.error('Cannot run videos redundancy %s.', redundancyConfig.strategy, { err })
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}
}
await this.extendsLocalExpiration()
await this.purgeRemoteExpired()
}
static get Instance () {
return this.instance || (this.instance = new this())
}
private async extendsLocalExpiration () {
const expired = await VideoRedundancyModel.listLocalExpired()
for (const redundancyModel of expired) {
try {
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const redundancyConfig = CONFIG.REDUNDANCY.VIDEOS.STRATEGIES.find(s => s.strategy === redundancyModel.strategy)
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const candidate: CandidateToDuplicate = {
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redundancy: redundancyConfig,
video: null,
files: [],
streamingPlaylists: []
}
// If the administrator disabled the redundancy or decreased the cache size, remove this redundancy instead of extending it
if (!redundancyConfig || await this.isTooHeavy(candidate)) {
logger.info('Destroying redundancy %s because the cache size %s is too heavy.', redundancyModel.url, redundancyModel.strategy)
await removeVideoRedundancy(redundancyModel)
} else {
await this.extendsRedundancy(redundancyModel)
}
} catch (err) {
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logger.error(
'Cannot extend or remove expiration of %s video from our redundancy system.', this.buildEntryLogId(redundancyModel),
{ err }
)
}
}
}
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private async extendsRedundancy (redundancyModel: MVideoRedundancyVideo) {
const redundancy = CONFIG.REDUNDANCY.VIDEOS.STRATEGIES.find(s => s.strategy === redundancyModel.strategy)
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// Redundancy strategy disabled, remove our redundancy instead of extending expiration
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if (!redundancy) {
await removeVideoRedundancy(redundancyModel)
return
}
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await this.extendsExpirationOf(redundancyModel, redundancy.minLifetime)
}
private async purgeRemoteExpired () {
const expired = await VideoRedundancyModel.listRemoteExpired()
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for (const redundancyModel of expired) {
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try {
await removeVideoRedundancy(redundancyModel)
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} catch (err) {
logger.error('Cannot remove redundancy %s from our redundancy system.', this.buildEntryLogId(redundancyModel))
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}
}
}
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private findVideoToDuplicate (cache: VideosRedundancyStrategy) {
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if (cache.strategy === 'most-views') {
return VideoRedundancyModel.findMostViewToDuplicate(REDUNDANCY.VIDEOS.RANDOMIZED_FACTOR)
}
if (cache.strategy === 'trending') {
return VideoRedundancyModel.findTrendingToDuplicate(REDUNDANCY.VIDEOS.RANDOMIZED_FACTOR)
}
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if (cache.strategy === 'recently-added') {
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const minViews = cache.minViews
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return VideoRedundancyModel.findRecentlyAddedToDuplicate(REDUNDANCY.VIDEOS.RANDOMIZED_FACTOR, minViews)
}
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}
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private async createVideoRedundancies (data: CandidateToDuplicate) {
const video = await this.loadAndRefreshVideo(data.video.url)
if (!video) {
logger.info('Video %s we want to duplicate does not existing anymore, skipping.', data.video.url)
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return
}
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for (const file of data.files) {
const existingRedundancy = await VideoRedundancyModel.loadLocalByFileId(file.id)
if (existingRedundancy) {
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await this.extendsRedundancy(existingRedundancy)
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continue
}
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await this.createVideoFileRedundancy(data.redundancy, video, file)
}
for (const streamingPlaylist of data.streamingPlaylists) {
const existingRedundancy = await VideoRedundancyModel.loadLocalByStreamingPlaylistId(streamingPlaylist.id)
if (existingRedundancy) {
await this.extendsRedundancy(existingRedundancy)
continue
}
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await this.createStreamingPlaylistRedundancy(data.redundancy, video, streamingPlaylist)
}
}
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private async createVideoFileRedundancy (redundancy: VideosRedundancyStrategy | null, video: MVideoAccountLight, fileArg: MVideoFile) {
let strategy = 'manual'
let expiresOn: Date = null
if (redundancy) {
strategy = redundancy.strategy
expiresOn = this.buildNewExpiration(redundancy.minLifetime)
}
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const file = fileArg as MVideoFileVideo
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file.Video = video
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const serverActor = await getServerActor()
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logger.info('Duplicating %s - %d in videos redundancy with "%s" strategy.', video.url, file.resolution, strategy)
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const trackerUrls = await TrackerModel.listUrlsByVideoId(video.id)
const magnetUri = generateMagnetUri(video, file, trackerUrls)
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const tmpPath = await downloadWebTorrentVideo({ magnetUri }, VIDEO_IMPORT_TIMEOUT)
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const destPath = join(CONFIG.STORAGE.REDUNDANCY_DIR, file.filename)
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await move(tmpPath, destPath, { overwrite: true })
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const createdModel: MVideoRedundancyFileVideo = await VideoRedundancyModel.create({
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expiresOn,
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url: getLocalVideoCacheFileActivityPubUrl(file),
fileUrl: generateWebTorrentRedundancyUrl(file),
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strategy,
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videoFileId: file.id,
actorId: serverActor.id
})
createdModel.VideoFile = file
await sendCreateCacheFile(serverActor, video, createdModel)
logger.info('Duplicated %s - %d -> %s.', video.url, file.resolution, createdModel.url)
}
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private async createStreamingPlaylistRedundancy (
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redundancy: VideosRedundancyStrategy,
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video: MVideoAccountLight,
playlistArg: MStreamingPlaylist
) {
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let strategy = 'manual'
let expiresOn: Date = null
if (redundancy) {
strategy = redundancy.strategy
expiresOn = this.buildNewExpiration(redundancy.minLifetime)
}
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const playlist = playlistArg as MStreamingPlaylistVideo
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playlist.Video = video
const serverActor = await getServerActor()
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logger.info('Duplicating %s streaming playlist in videos redundancy with "%s" strategy.', video.url, strategy)
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const destDirectory = join(HLS_REDUNDANCY_DIRECTORY, video.uuid)
await downloadPlaylistSegments(playlist.playlistUrl, destDirectory, VIDEO_IMPORT_TIMEOUT)
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const createdModel: MVideoRedundancyStreamingPlaylistVideo = await VideoRedundancyModel.create({
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expiresOn,
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url: getLocalVideoCacheStreamingPlaylistActivityPubUrl(video, playlist),
fileUrl: generateHLSRedundancyUrl(video, playlistArg),
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strategy,
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videoStreamingPlaylistId: playlist.id,
actorId: serverActor.id
})
createdModel.VideoStreamingPlaylist = playlist
await sendCreateCacheFile(serverActor, video, createdModel)
logger.info('Duplicated playlist %s -> %s.', playlist.playlistUrl, createdModel.url)
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}
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private async extendsExpirationOf (redundancy: MVideoRedundancyVideo, expiresAfterMs: number) {
logger.info('Extending expiration of %s.', redundancy.url)
const serverActor = await getServerActor()
redundancy.expiresOn = this.buildNewExpiration(expiresAfterMs)
await redundancy.save()
await sendUpdateCacheFile(serverActor, redundancy)
}
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private async purgeCacheIfNeeded (candidateToDuplicate: CandidateToDuplicate) {
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while (await this.isTooHeavy(candidateToDuplicate)) {
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const redundancy = candidateToDuplicate.redundancy
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const toDelete = await VideoRedundancyModel.loadOldestLocalExpired(redundancy.strategy, redundancy.minLifetime)
if (!toDelete) return
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const videoId = toDelete.VideoFile
? toDelete.VideoFile.videoId
: toDelete.VideoStreamingPlaylist.videoId
const redundancies = await VideoRedundancyModel.listLocalByVideoId(videoId)
for (const redundancy of redundancies) {
await removeVideoRedundancy(redundancy)
}
}
}
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private async isTooHeavy (candidateToDuplicate: CandidateToDuplicate) {
const maxSize = candidateToDuplicate.redundancy.size
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const { totalUsed } = await VideoRedundancyModel.getStats(candidateToDuplicate.redundancy.strategy)
const totalWillDuplicate = totalUsed + this.getTotalFileSizes(candidateToDuplicate.files, candidateToDuplicate.streamingPlaylists)
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return totalWillDuplicate > maxSize
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}
private buildNewExpiration (expiresAfterMs: number) {
return new Date(Date.now() + expiresAfterMs)
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}
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private buildEntryLogId (object: MVideoRedundancyFileVideo | MVideoRedundancyStreamingPlaylistVideo) {
if (isMVideoRedundancyFileVideo(object)) return `${object.VideoFile.Video.url}-${object.VideoFile.resolution}`
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return `${object.VideoStreamingPlaylist.playlistUrl}`
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}
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private getTotalFileSizes (files: MVideoFile[], playlists: MStreamingPlaylistFiles[]) {
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const fileReducer = (previous: number, current: MVideoFile) => previous + current.size
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let allFiles = files
for (const p of playlists) {
allFiles = allFiles.concat(p.VideoFiles)
}
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return allFiles.reduce(fileReducer, 0)
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}
private async loadAndRefreshVideo (videoUrl: string) {
// We need more attributes and check if the video still exists
const getVideoOptions = {
videoObject: videoUrl,
syncParam: { likes: false, dislikes: false, shares: false, comments: false, thumbnail: false, refreshVideo: true },
fetchType: 'all' as 'all'
}
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const { video } = await getOrCreateAPVideo(getVideoOptions)
return video
}
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}