2 files changed, 187 insertions, 0 deletions

diff --git a/server/lib/opentelemetry/metric-helpers/index.ts b/server/lib/opentelemetry/metric-helpers/index.ts
new file mode 100644
index 000000000..cabb27326
--- /dev/null
+++ b/server/lib/opentelemetry/metric-helpers/index.ts
@@ -0,0 +1 @@
+export * from './stats-observers-builder'
diff --git a/server/lib/opentelemetry/metric-helpers/stats-observers-builder.ts b/server/lib/opentelemetry/metric-helpers/stats-observers-builder.ts
new file mode 100644
index 000000000..90b58f33d
--- /dev/null
+++ b/server/lib/opentelemetry/metric-helpers/stats-observers-builder.ts
@@ -0,0 +1,186 @@
+import memoizee from 'memoizee'
+import { Meter } from '@opentelemetry/api-metrics'
+import { MEMOIZE_TTL } from '@server/initializers/constants'
+import { buildAvailableActivities } from '@server/lib/activitypub/activity'
+import { StatsManager } from '@server/lib/stat-manager'
+
+export class StatsObserverBuilder {
+
+  private readonly getInstanceStats = memoizee(() => {
+    return StatsManager.Instance.getStats()
+  }, { maxAge: MEMOIZE_TTL.GET_STATS_FOR_OPEN_TELEMETRY_METRICS })
+
+  constructor (private readonly meter: Meter) {
+
+  }
+
+  buildObservers () {
+    this.buildUserStatsObserver()
+    this.buildVideoStatsObserver()
+    this.buildCommentStatsObserver()
+    this.buildPlaylistStatsObserver()
+    this.buildChannelStatsObserver()
+    this.buildInstanceFollowsStatsObserver()
+    this.buildRedundancyStatsObserver()
+    this.buildActivityPubStatsObserver()
+  }
+
+  private buildUserStatsObserver () {
+    this.meter.createObservableGauge('peertube_users_total', {
+      description: 'Total users on the instance'
+    }).addCallback(async observableResult => {
+      const stats = await this.getInstanceStats()
+
+      observableResult.observe(stats.totalUsers)
+    })
+
+    this.meter.createObservableGauge('peertube_active_users_total', {
+      description: 'Total active users on the instance'
+    }).addCallback(async observableResult => {
+      const stats = await this.getInstanceStats()
+
+      observableResult.observe(stats.totalDailyActiveUsers, { activeInterval: 'daily' })
+      observableResult.observe(stats.totalWeeklyActiveUsers, { activeInterval: 'weekly' })
+      observableResult.observe(stats.totalMonthlyActiveUsers, { activeInterval: 'monthly' })
+    })
+  }
+
+  private buildChannelStatsObserver () {
+    this.meter.createObservableGauge('peertube_channels_total', {
+      description: 'Total channels on the instance'
+    }).addCallback(async observableResult => {
+      const stats = await this.getInstanceStats()
+
+      observableResult.observe(stats.totalLocalVideoChannels, { channelOrigin: 'local' })
+    })
+
+    this.meter.createObservableGauge('peertube_active_channels_total', {
+      description: 'Total active channels on the instance'
+    }).addCallback(async observableResult => {
+      const stats = await this.getInstanceStats()
+
+      observableResult.observe(stats.totalLocalDailyActiveVideoChannels, { channelOrigin: 'local', activeInterval: 'daily' })
+      observableResult.observe(stats.totalLocalWeeklyActiveVideoChannels, { channelOrigin: 'local', activeInterval: 'weekly' })
+      observableResult.observe(stats.totalLocalMonthlyActiveVideoChannels, { channelOrigin: 'local', activeInterval: 'monthly' })
+    })
+  }
+
+  private buildVideoStatsObserver () {
+    this.meter.createObservableGauge('peertube_videos_total', {
+      description: 'Total videos on the instance'
+    }).addCallback(async observableResult => {
+      const stats = await this.getInstanceStats()
+
+      observableResult.observe(stats.totalLocalVideos, { videoOrigin: 'local' })
+      observableResult.observe(stats.totalVideos - stats.totalLocalVideos, { videoOrigin: 'remote' })
+    })
+
+    this.meter.createObservableGauge('peertube_video_views_total', {
+      description: 'Total video views made on the instance'
+    }).addCallback(async observableResult => {
+      const stats = await this.getInstanceStats()
+
+      observableResult.observe(stats.totalLocalVideoViews, { viewOrigin: 'local' })
+    })
+
+    this.meter.createObservableGauge('peertube_video_bytes_total', {
+      description: 'Total bytes of videos'
+    }).addCallback(async observableResult => {
+      const stats = await this.getInstanceStats()
+
+      observableResult.observe(stats.totalLocalVideoFilesSize, { videoOrigin: 'local' })
+    })
+  }
+
+  private buildCommentStatsObserver () {
+    this.meter.createObservableGauge('peertube_comments_total', {
+      description: 'Total comments on the instance'
+    }).addCallback(async observableResult => {
+      const stats = await this.getInstanceStats()
+
+      observableResult.observe(stats.totalLocalVideoComments, { accountOrigin: 'local' })
+    })
+  }
+
+  private buildPlaylistStatsObserver () {
+    this.meter.createObservableGauge('peertube_playlists_total', {
+      description: 'Total playlists on the instance'
+    }).addCallback(async observableResult => {
+      const stats = await this.getInstanceStats()
+
+      observableResult.observe(stats.totalLocalPlaylists, { playlistOrigin: 'local' })
+    })
+  }
+
+  private buildInstanceFollowsStatsObserver () {
+    this.meter.createObservableGauge('peertube_instance_followers_total', {
+      description: 'Total followers of the instance'
+    }).addCallback(async observableResult => {
+      const stats = await this.getInstanceStats()
+
+      observableResult.observe(stats.totalInstanceFollowers)
+    })
+
+    this.meter.createObservableGauge('peertube_instance_following_total', {
+      description: 'Total following of the instance'
+    }).addCallback(async observableResult => {
+      const stats = await this.getInstanceStats()
+
+      observableResult.observe(stats.totalInstanceFollowing)
+    })
+  }
+
+  private buildRedundancyStatsObserver () {
+    this.meter.createObservableGauge('peertube_redundancy_used_bytes_total', {
+      description: 'Total redundancy used of the instance'
+    }).addCallback(async observableResult => {
+      const stats = await this.getInstanceStats()
+
+      for (const r of stats.videosRedundancy) {
+        observableResult.observe(r.totalUsed, { strategy: r.strategy })
+      }
+    })
+
+    this.meter.createObservableGauge('peertube_redundancy_available_bytes_total', {
+      description: 'Total redundancy available of the instance'
+    }).addCallback(async observableResult => {
+      const stats = await this.getInstanceStats()
+
+      for (const r of stats.videosRedundancy) {
+        observableResult.observe(r.totalSize, { strategy: r.strategy })
+      }
+    })
+  }
+
+  private buildActivityPubStatsObserver () {
+    const availableActivities = buildAvailableActivities()
+
+    this.meter.createObservableGauge('peertube_ap_inbox_success_total', {
+      description: 'Total inbox messages processed with success'
+    }).addCallback(async observableResult => {
+      const stats = await this.getInstanceStats()
+
+      for (const type of availableActivities) {
+        observableResult.observe(stats[`totalActivityPub${type}MessagesSuccesses`], { activityType: type })
+      }
+    })
+
+    this.meter.createObservableGauge('peertube_ap_inbox_error_total', {
+      description: 'Total inbox messages processed with error'
+    }).addCallback(async observableResult => {
+      const stats = await this.getInstanceStats()
+
+      for (const type of availableActivities) {
+        observableResult.observe(stats[`totalActivityPub${type}MessagesErrors`], { activityType: type })
+      }
+    })
+
+    this.meter.createObservableGauge('peertube_ap_inbox_waiting_total', {
+      description: 'Total inbox messages waiting for being processed'
+    }).addCallback(async observableResult => {
+      const stats = await this.getInstanceStats()
+
+      observableResult.observe(stats.totalActivityPubMessagesWaiting)
+    })
+  }
+}