[clsi] add metric for disk usage (#24303)

GitOrigin-RevId: e21b867a2fdaf54e9ec5b29b0f80b29349eb901c

services/clsi/app/js/ProjectPersistenceManager.js

@@ -13,6 +13,7 @@ const CompileManager = require('./CompileManager')
 const async = require('async')
 const logger = require('@overleaf/logger')
 const oneDay = 24 * 60 * 60 * 1000
+const Metrics = require('@overleaf/metrics')
 const Settings = require('@overleaf/settings')
 const diskusage = require('diskusage')
 const { callbackify } = require('node:util')
@@ -31,7 +32,11 @@ async function refreshExpiryTimeout() {
   for (const path of paths) {
     try {
       const stats = await diskusage.check(path)
-      const lowDisk = stats.available / stats.total < 0.1
+      const diskAvailablePercent = (stats.available / stats.total) * 100
+      Metrics.gauge('disk_available_percent', diskAvailablePercent, 1, {
+        path,
+      })
+      const lowDisk = diskAvailablePercent < 10
 
       const lowerExpiry = ProjectPersistenceManager.EXPIRY_TIMEOUT * 0.9
       if (lowDisk && Settings.project_cache_length_ms / 2 < lowerExpiry) {

services/clsi/test/unit/js/ProjectPersistenceManagerTests.js

@@ -23,6 +23,7 @@ describe('ProjectPersistenceManager', function () {
   beforeEach(function () {
     this.ProjectPersistenceManager = SandboxedModule.require(modulePath, {
       requires: {
+        '@overleaf/metrics': (this.Metrics = { gauge: sinon.stub() }),
         './UrlCache': (this.UrlCache = {}),
         './CompileManager': (this.CompileManager = {}),
         diskusage: (this.diskusage = { check: sinon.stub() }),
@@ -49,6 +50,10 @@ describe('ProjectPersistenceManager', function () {
       })
 
       this.ProjectPersistenceManager.refreshExpiryTimeout(() => {
+        this.Metrics.gauge.should.have.been.calledWith(
+          'disk_available_percent',
+          40
+        )
         this.ProjectPersistenceManager.EXPIRY_TIMEOUT.should.equal(
           this.settings.project_cache_length_ms
         )
@@ -63,6 +68,10 @@ describe('ProjectPersistenceManager', function () {
       })
 
       this.ProjectPersistenceManager.refreshExpiryTimeout(() => {
+        this.Metrics.gauge.should.have.been.calledWith(
+          'disk_available_percent',
+          5
+        )
         this.ProjectPersistenceManager.EXPIRY_TIMEOUT.should.equal(900)
         done()
       })
@@ -75,6 +84,10 @@ describe('ProjectPersistenceManager', function () {
       })
       this.ProjectPersistenceManager.EXPIRY_TIMEOUT = 500
       this.ProjectPersistenceManager.refreshExpiryTimeout(() => {
+        this.Metrics.gauge.should.have.been.calledWith(
+          'disk_available_percent',
+          5
+        )
         this.ProjectPersistenceManager.EXPIRY_TIMEOUT.should.equal(500)
         done()
       })