Merge pull request #4922 from overleaf/jpa-web-clsi-metrics

[web] add new metrics for tracking initial assign/switch of clsi backend

GitOrigin-RevId: 4fb15ee8727cb397d1e44a86efb7d4833626bc6b

services/web/app/src/Features/Compile/ClsiCookieManager.js

@@ -22,6 +22,7 @@ if (Settings.redis.clsi_cookie_secondary != null) {
 }
 const Cookie = require('cookie')
 const logger = require('logger-sharelatex')
+const Metrics = require('@overleaf/metrics')
 
 const clsiCookiesEnabled =
   (Settings.clsiCookie != null ? Settings.clsiCookie.key : undefined) != null &&
@@ -72,7 +73,12 @@ module.exports = function (backendGroup) {
           })
           return callback(err)
         }
-        this.setServerId(project_id, user_id, res, function (err, serverId) {
+        this.setServerId(
+          project_id,
+          user_id,
+          res,
+          null,
+          function (err, serverId) {
             if (err != null) {
               logger.warn(
                 { err, project_id },
@@ -80,7 +86,8 @@ module.exports = function (backendGroup) {
               )
             }
             return callback(err, serverId)
-        })
+          }
+        )
       })
     },
 
@@ -93,7 +100,7 @@ module.exports = function (backendGroup) {
       return cookies != null ? cookies[Settings.clsiCookie.key] : undefined
     },
 
-    setServerId(project_id, user_id, response, callback) {
+    setServerId(project_id, user_id, response, previous, callback) {
       if (callback == null) {
         callback = function (err, serverId) {}
       }
@@ -109,6 +116,12 @@ module.exports = function (backendGroup) {
           err => callback(err, undefined)
         )
       }
+      if (!previous) {
+        // Initial assignment of a user+project or after clearing cache.
+        Metrics.inc('clsi-lb-assign-initial-backend')
+      } else {
+        Metrics.inc('clsi-lb-switch-backend')
+      }
       if (rclient_secondary != null) {
         this._setServerIdInRedis(
           rclient_secondary,

services/web/app/src/Features/Compile/ClsiManager.js

@@ -328,6 +328,7 @@ const ClsiManager = {
                   projectId,
                   userId,
                   response,
+                  clsiServerId,
                   (err, newClsiServerId) => {
                     if (err != null) {
                       callback(
@@ -420,7 +421,7 @@ const ClsiManager = {
     NewBackendCloudClsiCookieManager.getCookieJar(
       projectId,
       userId,
-      (err, jar) => {
+      (err, jar, clsiServerId) => {
         if (err != null) {
           return callback(
             OError.tag(err, 'error getting cookie jar for CLSI request', {
@@ -444,6 +445,7 @@ const ClsiManager = {
             projectId,
             userId,
             response,
+            clsiServerId,
             err => {
               if (err != null) {
                 return callback(

services/web/test/unit/src/Compile/ClsiCookieManagerTests.js

@@ -118,7 +118,7 @@ describe('ClsiCookieManager', function () {
       this.request.post.callsArgWith(1, null, this.response)
       return (this.ClsiCookieManager.setServerId = sinon
         .stub()
-        .callsArgWith(3, null, 'clsi-9'))
+        .yields(null, 'clsi-9'))
     })
 
     it('should make a request to the clsi', function (done) {
@@ -160,6 +160,7 @@ describe('ClsiCookieManager', function () {
         this.project_id,
         this.user_id,
         this.response,
+        null,
         err => {
           this.redis.setex
             .calledWith(
@@ -178,6 +179,7 @@ describe('ClsiCookieManager', function () {
         this.project_id,
         this.user_id,
         this.response,
+        null,
         (err, serverId) => {
           serverId.should.equal('clsi-8')
           return done()
@@ -197,6 +199,7 @@ describe('ClsiCookieManager', function () {
         this.project_id,
         this.user_id,
         this.response,
+        null,
         (err, serverId) => {
           this.redis.setex.called.should.equal(false)
           return done()
@@ -212,6 +215,7 @@ describe('ClsiCookieManager', function () {
         this.project_id,
         this.user_id,
         this.response,
+        null,
         (err, serverId) => {
           this.redis.setex.called.should.equal(false)
           return done()
@@ -240,6 +244,7 @@ describe('ClsiCookieManager', function () {
         this.project_id,
         this.user_id,
         this.response,
+        null,
         (err, serverId) => {
           this.redis_secondary.setex
             .calledWith(

services/web/test/unit/src/Compile/ClsiManagerTests.js

@@ -9,7 +9,7 @@ describe('ClsiManager', function () {
     this.ClsiCookieManager = {
       clearServerId: sinon.stub().yields(),
       getCookieJar: sinon.stub().callsArgWith(2, null, this.jar),
-      setServerId: sinon.stub().callsArgWith(3),
+      setServerId: sinon.stub().yields(null),
       _getServerId: sinon.stub(),
     }
     this.ClsiStateManager = {