final instrumentation

docker-compose.yml

@@ -0,0 +1,82 @@
+# endpoints
+# prometheus: http://localhost:9090
+# grafana: http://localhost:3000
+# jaeger: http://localhost:16686
+# zipkin: http://localhost:9411
+# otel-collector-metrics: http://localhost:8889
+# tempo: http://localhost:3200
+
+# version: '3'
+services:
+  otel-collector:
+    image: otel/opentelemetry-collector-contrib:0.102.1
+    restart: always
+    command:
+      - --config=/etc/otelcol-contrib/otel-collector.yml
+    volumes:
+      - ./docker/collector/otel-collector.yml:/etc/otelcol-contrib/otel-collector.yml
+    ports:
+      - "1888:1888" # pprof extension
+      - "8888:8888" # Prometheus metrics exposed by the collector
+      - "8889:8889" # Prometheus exporter metrics
+      - "13133:13133" # health_check extension
+      - "4317:4317" # OTLP gRPC receiver
+      - "4318:4318" # OTLP http receiver
+      - "55679:55679" # zpages extension
+    depends_on:
+      - jaeger-all-in-one
+      - zipkin-all-in-one
+
+  prometheus:
+    container_name: prometheus
+    image: prom/prometheus
+    restart: always
+    command:
+      - --config.file=/etc/prometheus/prometheus.yml
+    volumes:
+      - ./docker/prometheus/prometheus.yml:/etc/prometheus/prometheus.yml
+    ports:
+      - "9090:9090"
+
+  loki:
+    image: grafana/loki:latest
+    command: -config.file=/etc/loki/local-config.yaml
+    ports:
+      - "3100:3100"
+
+  tempo:
+    image: grafana/tempo:latest
+    command: [ "-config.file=/etc/tempo.yml" ]
+    volumes:
+      - ./docker/tempo/tempo.yml:/etc/tempo.yml
+    ports:
+      - "3200:3200"   # tempo
+      - "4317"  # otlp grpc
+      - "4318"  # otlp http
+
+  grafana:
+    container_name: grafana
+    image: grafana/grafana
+    volumes:
+      - ./docker/grafana/grafana-datasources.yml:/etc/grafana/provisioning/datasources/datasources.yml
+    ports:
+      - "3000:3000"
+
+  # Jaeger
+  jaeger-all-in-one:
+    image: jaegertracing/all-in-one:latest
+    environment:
+      - COLLECTOR_OTLP_ENABLED=true
+      - JAEGER_QUERY_MAX_CLOCK_SKEW_ADJUSTMENT=0s
+    restart: always
+    ports:
+      - "16686:16686"
+      - "4318"
+      - "4317"
+
+  # Zipkin
+  zipkin-all-in-one:
+    image: openzipkin/zipkin:latest
+    restart: always
+    ports:
+      - "9411:9411"

docker/collector/otel-collector.yml

@@ -0,0 +1,72 @@
+receivers:
+  otlp:
+    protocols:
+      http:
+        endpoint: 0.0.0.0:4318
+      grpc:
+        endpoint: 0.0.0.0:4317
+
+processors:
+  # batch metrics before sending to reduce API usage
+  batch:
+
+exporters:
+  logging:
+    loglevel: debug
+
+  loki:
+    endpoint: "http://loki:3100/loki/api/v1/push"
+
+  prometheus:
+    endpoint: "0.0.0.0:8889"
+    const_labels:
+      label1: value1
+
+  otlphttp/tempo:
+    endpoint: "http://tempo:4318"
+    tls:
+      insecure: true
+
+  otlp:
+    endpoint: "api.eu1.honeycomb.io:443"
+    headers:
+      "x-honeycomb-team": ""
+
+  otlphttp/jaeger:
+    endpoint: "http://jaeger-all-in-one:4318"
+    tls:
+      insecure: true
+
+  # datadog:
+  #  api: 
+  #    key: ""
+
+  zipkin:
+    endpoint: "http://zipkin-all-in-one:9411/api/v2/spans"
+    format: proto
+
+
+# https://github.com/open-telemetry/opentelemetry-collector/blob/main/extension/README.md
+extensions:
+  # responsible for responding to health check calls on behalf of the collector.
+  health_check:
+  # fetches the collector’s performance data
+  pprof:
+  # serves as an http endpoint that provides live debugging data about instrumented components.
+  zpages:
+
+service:
+  extensions: [health_check, pprof, zpages]
+  pipelines:
+    metrics:
+      receivers: [otlp]
+      processors: [batch]
+      exporters: [prometheus]
+    traces:
+      receivers: [otlp]
+      processors: [batch]
+      exporters: [otlphttp/tempo,otlphttp/jaeger,otlp,zipkin]
+      # exporters: [otlphttp/jaeger,zipkin]
+    logs:
+      receivers: [otlp]
+      exporters: [loki]

docker/grafana/grafana-datasources.yml

@@ -0,0 +1,47 @@
+apiVersion: 1
+
+datasources:
+  - name: Prometheus
+    type: prometheus
+    uid: prometheus
+    access: proxy
+    orgId: 1
+    url: http://prometheus:9090
+    basicAuth: false
+    isDefault: false
+    version: 1
+    editable: false
+    jsonData:
+      httpMethod: GET
+  - name: Loki
+    type: loki
+    uid: loki
+    access: proxy
+    orgId: 1
+    url: http://loki:3100
+    basicAuth: false
+    isDefault: false
+    version: 1
+    editable: false
+  - name: Tempo
+    type: tempo
+    access: proxy
+    orgId: 1
+    url: http://tempo:3200
+    basicAuth: false
+    isDefault: true
+    version: 1
+    editable: false
+    apiVersion: 1
+    uid: tempo
+    jsonData:
+      httpMethod: GET
+      serviceMap:
+        datasourceUid: prometheus
+      tracesToLogsV2:
+        datasourceUid: loki
+        spanStartTimeShift: '-1h'
+        spanEndTimeShift: '1h'
+        filterByTraceID: true
+        filterBySpanID: true
+        tags: [ { key: 'service.name', value: 'job' } ]

docker/prometheus/prometheus.yml

@@ -0,0 +1,15 @@
+global:
+  scrape_interval: 10s
+  evaluation_interval: 10s
+
+scrape_configs:
+  - job_name: 'otel-collector'
+    static_configs:
+      - targets: ['otel-collector:8889']
+    
+
+  # For direct metrics collection from service to Prometheus
+  # - job_name: 'cloudserver-service-app'
+  #   metrics_path: /metrics
+  #   static_configs:
+  #     - targets: ['host.docker.internal:8002']

docker/tempo/tempo.yml

@@ -0,0 +1,46 @@
+server:
+  http_listen_port: 3200
+
+distributor:
+  receivers:                           # this configuration will listen on all ports and protocols that tempo is capable of.
+    jaeger:                            # the receives all come from the OpenTelemetry collector.  more configuration information can
+      protocols:                       # be found there: https://github.com/open-telemetry/opentelemetry-collector/tree/main/receiver
+        thrift_http:                   #
+        grpc:                          # for a production deployment you should only enable the receivers you need!
+        thrift_binary:
+        thrift_compact:
+    zipkin:
+    otlp:
+      protocols:
+        http:
+        grpc:
+    opencensus:
+
+ingester:
+  max_block_duration: 5m               # cut the headblock when this much time passes. this is being set for demo purposes and should probably be left alone normally
+
+compactor:
+  compaction:
+    block_retention: 1h                # overall Tempo trace retention. set for demo purposes
+
+metrics_generator:
+  registry:
+    external_labels:
+      source: tempo
+      cluster: docker-compose
+  storage:
+    path: /tmp/tempo/generator/wal
+    remote_write:
+      - url: http://prometheus:9090/api/v1/write
+        send_exemplars: true
+
+storage:
+  trace:
+    backend: local                     # backend configuration to use
+    wal:
+      path: /tmp/tempo/wal             # where to store the the wal locally
+    local:
+      path: /tmp/tempo/blocks
+
+overrides:
+  metrics_generator_processors: [service-graphs, span-metrics] # enables metrics generator

instrumentation.js

@@ -0,0 +1,72 @@
+const opentelemetry = require('@opentelemetry/sdk-node');
+const { WebTracerProvider } = require('@opentelemetry/sdk-trace-web');
+const { Resource } = require('@opentelemetry/resources');
+const { PeriodicExportingMetricReader } = require('@opentelemetry/sdk-metrics');
+const { getNodeAutoInstrumentations } = require('@opentelemetry/auto-instrumentations-node');
+const { OTLPMetricExporter } = require('@opentelemetry/exporter-metrics-otlp-proto');
+const { OTLPTraceExporter } = require('@opentelemetry/exporter-trace-otlp-proto');
+const { BatchSpanProcessor } = require('@opentelemetry/sdk-trace-base');
+const { IORedisInstrumentation } = require('@opentelemetry/instrumentation-ioredis');
+
+const {
+    SEMRESATTRS_SERVICE_NAME,
+    SEMRESATTRS_SERVICE_VERSION,
+} = require('@opentelemetry/semantic-conventions');
+
+// Define resource with service name and version
+const resource = new Resource({
+    [SEMRESATTRS_SERVICE_NAME]: process.env.OTEL_SERVICE_NAME || 'cloudserver-service',
+    [SEMRESATTRS_SERVICE_VERSION]: '7.70.47',
+});
+
+// OTLP Trace Exporter configuration
+const traceExporter = new OTLPTraceExporter({
+    url: `http://${process.env.OPENTLEMETRY_COLLECTOR_HOST || 'localhost'}:${process.env.OPENTLEMETRY_COLLECTOR_PORT || 4318}/v1/traces`,
+    headers: {},
+});
+
+
+// Metric Reader configuration
+const metricReader = new PeriodicExportingMetricReader({
+    exporter: new OTLPMetricExporter({
+        url: `http://${process.env.OPENTLEMETRY_COLLECTOR_HOST || 'localhost'}:${process.env.OPENTLEMETRY_COLLECTOR_PORT || 4318}/v1/metrics`,
+        headers: {},
+        concurrencyLimit: 1,
+    }),
+});
+
+// Node SDK configuration
+const sdk = new opentelemetry.NodeSDK({
+    traceExporter,
+    resource,
+    metricReader,
+    instrumentations: [
+        getNodeAutoInstrumentations({
+            '@opentelemetry/instrumentation-fs': {
+                enabled: false,
+            },
+            '@opentelemetry/instrumentation-http': {
+                responseHook: (span, operations) => {
+                    span.updateName(`${operations.req.protocol} ${operations.req.method} ${operations.req.path.split('&')[0]}`);
+                },
+            },
+        }),
+        new IORedisInstrumentation({
+            requestHook: (span, { cmdName, cmdArgs }) => {
+                span.updateName(`Redis:: ${cmdName.toUpperCase()} cache operation  for ${cmdArgs[0].split(':')[0]}`);
+            },
+            // see under for available configuration
+        }),
+    ],
+});
+
+// Additional WebTracerProvider configuration
+// This will initialize TracerProvider that will let us create a Tracers
+const webTracerProvider = new WebTracerProvider({ resource });
+const webSpanProcessor = new BatchSpanProcessor(traceExporter);
+webTracerProvider.addSpanProcessor(webSpanProcessor);
+webTracerProvider.register();
+
+// Start the Node SDK
+sdk.start();
+

lib/api/api.js

@@ -1,5 +1,6 @@
 const { auth, errors, policies } = require('arsenal');
 const async = require('async');
+const opentelemetry = require('@opentelemetry/api');
 
 const bucketDelete = require('./bucketDelete');
 const bucketDeleteCors = require('./bucketDeleteCors');
@@ -75,7 +76,12 @@ auth.setHandler(vault);
 
 /* eslint-disable no-param-reassign */
 const api = {
-    callApiMethod(apiMethod, request, response, log, callback) {
+    callApiMethod(apiMethod, request, response, log, callback, tracer) {
+        return tracer.startActiveSpan('Using Cloudserver to processing API related operations', methodSpan => {
+            methodSpan.addEvent('Cloudserver::callApiMethod() Processing API related operations');
+            methodSpan.setAttribute('code.function', 'callApiMethod()');
+            methodSpan.setAttribute('code.filepath', 'lib/api/api.js');
+            methodSpan.setAttribute('code.lineno', 84);
             // Attach the apiMethod method to the request, so it can used by monitoring in the server
             // eslint-disable-next-line no-param-reassign
             request.apiMethod = apiMethod;
@@ -186,12 +192,25 @@ const api = {
             }
 
             return async.waterfall([
-            next => auth.server.doAuth(
+                next => tracer.startActiveSpan('Authentication of user against IAM', authUserSpan => {
+                    authUserSpan.setAttribute('code.function', 'auth.server.doAuth()');
+                    authUserSpan.setAttribute('code.filepath', 'lib/api/api.js');
+                    authUserSpan.setAttribute('code.lineno', 197);
+                    return next(null, authUserSpan);
+                }),
+                (authSpan, next) => auth.server.doAuth(
                     request, log, (err, userInfo, authorizationResults, streamingV4Params) => {
                         if (err) {
                             log.trace('authentication error', { error: err });
+                            authSpan.end();
                             return next(err);
                         }
+                        const authNames = { accountName: userInfo.getAccountDisplayName() };
+                        authSpan.setAttribute('user.accountName', authNames.accountName);
+                        if (authNames.userName) {
+                            authSpan.setAttribute('user.userName', authNames.userName);
+                        }
+                        authSpan.end();
                         return next(null, userInfo, authorizationResults, streamingV4Params);
                     }, 's3', requestContexts),
                 (userInfo, authorizationResults, streamingV4Params, next) => {
@@ -216,7 +235,6 @@ const api = {
                             post.push(chunk);
                         }
                     });
-
                     request.on('error', err => {
                         log.trace('error receiving request', {
                             error: err,
@@ -244,6 +262,7 @@ const api = {
                     apiMethod,
                     log,
                     (err, authResultsWithTags) => {
+                        methodSpan.addEvent('Authentication of user completed');
                         if (err) {
                             log.trace('tag authentication error', { error: err });
                             return next(err);
@@ -271,19 +290,35 @@ const api = {
                         return acc;
                     }, {});
                 }
+                const ctx = opentelemetry.trace.setSpan(
+                    opentelemetry.context.active(),
+                    methodSpan,
+                );
+                const apiSpan = tracer.startSpan(`API operation for ${apiMethod}`, undefined, ctx);
                 if (apiMethod === 'objectPut' || apiMethod === 'objectPutPart') {
                     request._response = response;
                     return this[apiMethod](userInfo, request, streamingV4Params,
-                    log, callback, authorizationResults);
+                        log, callback, authorizationResults, apiSpan, methodSpan);
                 }
                 if (apiMethod === 'objectCopy' || apiMethod === 'objectPutCopyPart') {
                     return this[apiMethod](userInfo, request, sourceBucket,
-                    sourceObject, sourceVersionId, log, callback);
+                        sourceObject, sourceVersionId, log, callback, apiSpan);
                 }
                 if (apiMethod === 'objectGet') {
-                return this[apiMethod](userInfo, request, returnTagCount, log, callback);
+                    return this[apiMethod](userInfo, request, returnTagCount, log, callback, apiSpan, methodSpan);
                 }
-            return this[apiMethod](userInfo, request, log, callback);
+                return this[apiMethod](userInfo, request, log, (err, res, cosrsHeaders) => {
+                    methodSpan.addEvent('Cloudserver::callApiMethod() API operation completed, sending response to client');
+                    apiSpan.end();
+                    return process.nextTick(() => {
+                        methodSpan.end();
+                        if (err) {
+                            return callback(err);
+                        }
+                        return callback(null, res, cosrsHeaders);
+                    });
+                }, apiSpan);
+            });
         });
     },
     bucketDelete,

lib/api/apiUtils/object/createAndStoreObject.js

@@ -1,6 +1,7 @@
 const async = require('async');
 const { errors, s3middleware } = require('arsenal');
 const getMetaHeaders = s3middleware.userMetadata.getMetaHeaders;
+const opentelemetry = require('@opentelemetry/api');
 
 const constants = require('../../../../constants');
 const { data } = require('../../../data/wrapper');
@@ -46,8 +47,30 @@ function _checkAndApplyZenkoMD(metaHeaders, request, isDeleteMarker) {
 }
 
 function _storeInMDandDeleteData(bucketName, dataGetInfo, cipherBundle,
-    metadataStoreParams, dataToDelete, log, requestMethod, callback) {
-    services.metadataStoreObject(bucketName, dataGetInfo,
+    metadataStoreParams, dataToDelete, log, requestMethod, callback, ctx, tracer) {
+    if (tracer) {
+        return tracer.startActiveSpan('Updating metadata', undefined, ctx, metadataSpan => {
+            return services.metadataStoreObject(bucketName, dataGetInfo,
+                cipherBundle, metadataStoreParams, (err, result) => {
+                    if (err) {
+                        return callback(err);
+                    }
+                    if (dataToDelete) {
+                        const newDataStoreName = Array.isArray(dataGetInfo) ?
+                            dataGetInfo[0].dataStoreName : null;
+                        return tracer.startActiveSpan('Deleting relevant metadadata', undefined, ctx, deleteMetadataSpan => {
+                            return data.batchDelete(dataToDelete, requestMethod,
+                                newDataStoreName, log, err => {
+                                    deleteMetadataSpan.end();
+                                    return callback(err, result, metadataSpan);
+                                });
+                        });
+                    }
+                    return callback(null, result);
+                });
+        });
+    }
+    return services.metadataStoreObject(bucketName, dataGetInfo,
         cipherBundle, metadataStoreParams, (err, result) => {
             if (err) {
                 return callback(err);
@@ -85,7 +108,8 @@ function _storeInMDandDeleteData(bucketName, dataGetInfo, cipherBundle,
  */
 function createAndStoreObject(bucketName, bucketMD, objectKey, objMD, authInfo,
         canonicalID, cipherBundle, request, isDeleteMarker, streamingV4Params,
-        overheadField, log, callback) {
+        overheadField, log, callback, apiSpan, callAPIMethodSpan) {
+    apiSpan.addEvent('preparing Object data and Metadata create object');
     const size = isDeleteMarker ? 0 : request.parsedContentLength;
     // although the request method may actually be 'DELETE' if creating a
     // delete marker, for our purposes we consider this to be a 'PUT'
@@ -203,17 +227,29 @@ function createAndStoreObject(bucketName, bucketMD, objectKey, objMD, authInfo,
     /* eslint-disable camelcase */
     const dontSkipBackend = externalBackends;
     /* eslint-enable camelcase */
-
+    apiSpan.addEvent('object data and metadata prepared, starting storage procedure');
+    const tracer = opentelemetry.trace.getTracer(process.env.OTEL_SERVICE_NAME);
+    const ctx = opentelemetry.trace.setSpan(
+        opentelemetry.context.active(),
+        apiSpan,
+    );
     return async.waterfall([
         function storeData(next) {
+            // const datastoreSpan = tracer.startSpan('Storing Data using sproxyd', undefined, ctx);
             if (size === 0 && !dontSkipBackend[locationType]) {
                 metadataStoreParams.contentMD5 = constants.emptyFileMd5;
                 return next(null, null, null);
             }
             return dataStore(objectKeyContext, cipherBundle, request, size,
-                    streamingV4Params, backendInfo, log, next);
+                streamingV4Params, backendInfo, log, (err, dataGetInfo, calculatedHash, dataStoreSpan) => {
+                    if (dataStoreSpan) {
+                        dataStoreSpan.end();
+                    }
+                    return next(err, dataGetInfo, calculatedHash);
+                }, ctx, tracer);
         },
         function processDataResult(dataGetInfo, calculatedHash, next) {
+            const processDataSpan = tracer.startSpan('Processing data stored for generating MD', undefined, ctx);
             if (dataGetInfo === null || dataGetInfo === undefined) {
                 return next(null, null);
             }
@@ -234,7 +270,10 @@ function createAndStoreObject(bucketName, bucketMD, objectKey, objMD, authInfo,
                     cipherBundle.cipheredDataKey;
             }
             metadataStoreParams.contentMD5 = calculatedHash;
+            return process.nextTick(() => {
+                processDataSpan.end();
                 return next(null, dataGetInfoArr);
+            });
         },
         function getVersioningInfo(infoArr, next) {
             return versioningPreprocessing(bucketName, bucketMD,
@@ -262,7 +301,12 @@ function createAndStoreObject(bucketName, bucketMD, objectKey, objMD, authInfo,
             }
             return _storeInMDandDeleteData(bucketName, infoArr,
                 cipherBundle, metadataStoreParams,
-                options.dataToDelete, log, requestMethod, next);
+                options.dataToDelete, log, requestMethod, (err, result, metadataSpan) => {
+                    if (metadataSpan) {
+                        metadataSpan.end();
+                    }
+                    return next(err, result);
+                }, ctx, tracer);
         },
     ], callback);
 }

lib/api/apiUtils/object/storeObject.js

@@ -16,7 +16,7 @@ const { prepareStream } = require('./prepareStream');
  * @return {function} - calls callback with arguments:
  * error, dataRetrievalInfo, and completedHash (if any)
  */
-function checkHashMatchMD5(stream, hashedStream, dataRetrievalInfo, log, cb) {
+function checkHashMatchMD5(stream, hashedStream, dataRetrievalInfo, log, cb, dataStoreSpan) {
     const contentMD5 = stream.contentMD5;
     const completedHash = hashedStream.completedHash;
     if (contentMD5 && completedHash && contentMD5 !== completedHash) {
@@ -36,7 +36,7 @@ function checkHashMatchMD5(stream, hashedStream, dataRetrievalInfo, log, cb) {
             return cb(errors.BadDigest);
         });
     }
-    return cb(null, dataRetrievalInfo, completedHash);
+    return cb(null, dataRetrievalInfo, completedHash, dataStoreSpan);
 }
 
 /**
@@ -56,12 +56,37 @@ function checkHashMatchMD5(stream, hashedStream, dataRetrievalInfo, log, cb) {
  * @return {undefined}
  */
 function dataStore(objectContext, cipherBundle, stream, size,
-    streamingV4Params, backendInfo, log, cb) {
+    streamingV4Params, backendInfo, log, cb, ctx, tracer) {
     const cbOnce = jsutil.once(cb);
     const dataStream = prepareStream(stream, streamingV4Params, log, cbOnce);
     if (!dataStream) {
         return process.nextTick(() => cb(errors.InvalidArgument));
     }
+    if (tracer) {
+        return tracer.startActiveSpan('Storing Data using sproxyd', undefined, ctx, dataStoreSpan => {
+            return data.put(
+                cipherBundle, dataStream, size, objectContext, backendInfo, log,
+                (err, dataRetrievalInfo, hashedStream) => {
+                    if (err) {
+                        log.error('error in datastore', {
+                            error: err,
+                        });
+                        return cbOnce(err);
+                    }
+                    if (!dataRetrievalInfo) {
+                        log.fatal('data put returned neither an error nor a key', {
+                            method: 'storeObject::dataStore',
+                        });
+                        return cbOnce(errors.InternalError);
+                    }
+                    log.trace('dataStore: backend stored key', {
+                        dataRetrievalInfo,
+                    });
+                    return checkHashMatchMD5(stream, hashedStream,
+                                             dataRetrievalInfo, log, cbOnce, dataStoreSpan);
+                });
+        });
+    }
     return data.put(
         cipherBundle, dataStream, size, objectContext, backendInfo, log,
         (err, dataRetrievalInfo, hashedStream) => {

lib/api/bucketGet.js

@@ -1,5 +1,6 @@
 const querystring = require('querystring');
 const { errors, versioning, s3middleware } = require('arsenal');
+const opentelemetry = require('@opentelemetry/api');
 
 const constants = require('../../constants');
 const services = require('../services');
@@ -261,7 +262,12 @@ function processMasterVersions(bucketName, listParams, list) {
 }
 
 function handleResult(listParams, requestMaxKeys, encoding, authInfo,
-    bucketName, list, corsHeaders, log, callback) {
+    bucketName, list, corsHeaders, log, callback, traceContext) {
+    const tracer = opentelemetry.trace.getTracer(process.env.OTEL_SERVICE_NAME);
+    const handleResultSpan = tracer.startSpan('Preparing result', undefined, traceContext);
+    handleResultSpan.setAttribute('code.function', 'handleResult()');
+    handleResultSpan.setAttribute('code.filepath', 'lib/api/bucketGet.js');
+    handleResultSpan.setAttribute('code.lineno', 270);
     // eslint-disable-next-line no-param-reassign
     listParams.maxKeys = requestMaxKeys;
     // eslint-disable-next-line no-param-reassign
@@ -275,6 +281,7 @@ function handleResult(listParams, requestMaxKeys, encoding, authInfo,
     }
     pushMetric('listBucket', log, { authInfo, bucket: bucketName });
     monitoring.promMetrics('GET', bucketName, '200', 'listBucket');
+    handleResultSpan.end();
     return callback(null, res, corsHeaders);
 }
 
@@ -288,7 +295,16 @@ function handleResult(listParams, requestMaxKeys, encoding, authInfo,
  *  with either error code or xml response body
  * @return {undefined}
  */
-function bucketGet(authInfo, request, log, callback) {
+function bucketGet(authInfo, request, log, callback, parentSpan) {
+    parentSpan.addEvent('Cloudserver::bucketGet() processing bucketGet request');
+    parentSpan.setAttribute('code.function', 'bucketGet()');
+    parentSpan.setAttribute('code.filepath', 'lib/api/bucketGet.js');
+    parentSpan.setAttribute('code.lineno', 299);
+    // const tracer = opentelemetry.trace.getTracer(process.env.OTEL_SERVICE_NAME);
+    const ctx = opentelemetry.trace.setSpan(
+        opentelemetry.context.active(),
+        parentSpan,
+    );
     const params = request.query;
     const bucketName = request.bucketName;
     const v2 = params['list-type'];
@@ -350,7 +366,7 @@ function bucketGet(authInfo, request, log, callback) {
     } else {
         listParams.marker = params.marker;
     }
-
+    // parentSpan.addEvent('Cloudserver::bucketGet() validating Metadata');
     standardMetadataValidateBucket(metadataValParams, request.actionImplicitDenies, log, (err, bucket) => {
         const corsHeaders = collectCorsHeaders(request.headers.origin,
             request.method, bucket);
@@ -367,7 +383,9 @@ function bucketGet(authInfo, request, log, callback) {
             listParams.versionIdMarker = params['version-id-marker'] ?
                 versionIdUtils.decode(params['version-id-marker']) : undefined;
         }
+        // parentSpan.addEvent('Cloudserver::bucketGet() Getting object listing');
         if (!requestMaxKeys) {
+            parentSpan.addEvent('Cloudserver::bucketGet() Empty bucket');
             const emptyList = {
                 CommonPrefixes: [],
                 Contents: [],
@@ -375,7 +393,7 @@ function bucketGet(authInfo, request, log, callback) {
                 IsTruncated: false,
             };
             return handleResult(listParams, requestMaxKeys, encoding, authInfo,
-                bucketName, emptyList, corsHeaders, log, callback);
+                bucketName, emptyList, corsHeaders, log, callback, ctx);
         }
         return services.getObjectListing(bucketName, listParams, log,
         (err, list) => {
@@ -386,9 +404,9 @@ function bucketGet(authInfo, request, log, callback) {
                 return callback(err, null, corsHeaders);
             }
             return handleResult(listParams, requestMaxKeys, encoding, authInfo,
-                bucketName, list, corsHeaders, log, callback);
-        });
-    });
+                bucketName, list, corsHeaders, log, callback, ctx);
+        }, ctx);
+    }, ctx);
     return undefined;
 }
 

lib/api/bucketHead.js

@@ -1,5 +1,6 @@
 const collectCorsHeaders = require('../utilities/collectCorsHeaders');
 const { standardMetadataValidateBucket } = require('../metadata/metadataUtils');
+const opentelemetry = require('@opentelemetry/api');
 
 const { pushMetric } = require('../utapi/utilities');
 const monitoring = require('../utilities/metrics');
@@ -13,7 +14,15 @@ const monitoring = require('../utilities/metrics');
  *  with either error code or success
  * @return {undefined}
  */
-function bucketHead(authInfo, request, log, callback) {
+function bucketHead(authInfo, request, log, callback, parentSpan) {
+    parentSpan.addEvent('Cloudserver::bucketGet() processing Head Bucket request');
+    parentSpan.setAttribute('code.function', 'bucketHead()');
+    parentSpan.setAttribute('code.filepath', 'lib/api/bucketHead.js');
+    parentSpan.setAttribute('code.lineno', 20);
+    const ctx = opentelemetry.trace.setSpan(
+        opentelemetry.context.active(),
+        parentSpan,
+    );
     log.debug('processing request', { method: 'bucketHead' });
     const bucketName = request.bucketName;
     const metadataValParams = {
@@ -38,7 +47,7 @@ function bucketHead(authInfo, request, log, callback) {
             'x-amz-bucket-region': bucket.getLocationConstraint(),
         };
         return callback(null, Object.assign(corsHeaders, headers));
-    });
+    }, ctx);
 }
 
 module.exports = bucketHead;

lib/api/objectDelete.js

@@ -1,6 +1,7 @@
 /* eslint-disable indent */
 const async = require('async');
 const { errors, versioning } = require('arsenal');
+const opentelemetry = require('@opentelemetry/api');
 
 const collectCorsHeaders = require('../utilities/collectCorsHeaders');
 const services = require('../services');
@@ -28,7 +29,16 @@ const { overheadField } = require('../../constants');
  * @param {function} cb - final cb to call with the result and response headers
  * @return {undefined}
  */
-function objectDelete(authInfo, request, log, cb) {
+function objectDelete(authInfo, request, log, cb, apiSpan) {
+    apiSpan.addEvent('Cloudserver::objectGet() processing objectPut request');
+    apiSpan.setAttribute('code.function', 'objectPut()');
+    apiSpan.setAttribute('code.filepath', 'lib/api/objectPut.js');
+    apiSpan.setAttribute('code.lineno', 50);
+    const ctx = opentelemetry.trace.setSpan(
+        opentelemetry.context.active(),
+        apiSpan,
+    );
+    const tracer = opentelemetry.trace.getTracer(process.env.OTEL_SERVICE_NAME);
     log.debug('processing request', { method: 'objectDelete' });
     if (authInfo.isRequesterPublicUser()) {
         log.debug('operation not available for public user');
@@ -97,9 +107,10 @@ function objectDelete(authInfo, request, log, cb) {
                     });
                 }
                 return next(null, bucketMD, objMD);
-            });
+            }, ctx);
         },
         function checkGovernanceBypassHeader(bucketMD, objectMD, next) {
+            apiSpan.addEvent('Check governance bypass header');
             // AWS only returns an object lock error if a version id
             // is specified, else continue to create a delete marker
             if (!reqVersionId) {
@@ -112,12 +123,15 @@ function objectDelete(authInfo, request, log, cb) {
                         log.debug('user does not have BypassGovernanceRetention and object is locked');
                         return next(err, bucketMD);
                     }
+                    apiSpan.addEvent('Checked governance bypass header');
                     return next(null, hasGovernanceBypass, bucketMD, objectMD);
                 });
             }
+            apiSpan.addEvent('Checked governance bypass header');
             return next(null, hasGovernanceBypass, bucketMD, objectMD);
         },
         function evaluateObjectLockPolicy(hasGovernanceBypass, bucketMD, objectMD, next) {
+            apiSpan.addEvent('Evaluate object lock policy');
             // AWS only returns an object lock error if a version id
             // is specified, else continue to create a delete marker
             if (!reqVersionId) {
@@ -135,7 +149,7 @@ function objectDelete(authInfo, request, log, cb) {
                 log.debug('trying to delete locked object');
                 return next(objectLockedError, bucketMD);
             }
-
+            apiSpan.addEvent('Object lock policy evaluation done');
             return next(null, bucketMD, objectMD);
         },
         function deleteOperation(bucketMD, objectMD, next) {
@@ -161,10 +175,14 @@ function objectDelete(authInfo, request, log, cb) {
                 if (!_bucketRequiresOplogUpdate(bucketMD)) {
                     delOptions.doesNotNeedOpogUpdate = true;
                 }
-
+                // return tracer.startActiveSpan('Deleting object', undefined, ctx, deleteObjectSpan => services.deleteObject(
+                //     bucketName, objectMD, objectKey, delOptions, false, log, (err, delResult) => {
+                //             deleteObjectSpan.end();
+                //             return next(err, bucketMD, objectMD, delResult, deleteInfo);
+                //         }));
                 return services.deleteObject(bucketName, objectMD, objectKey,
                     delOptions, false, log, (err, delResult) => next(err, bucketMD,
-                    objectMD, delResult, deleteInfo));
+                    objectMD, delResult, deleteInfo), ctx);
             }
             // putting a new delete marker
             deleteInfo.newDeleteMarker = true;
@@ -257,6 +275,7 @@ function objectDelete(authInfo, request, log, cb) {
             monitoring.promMetrics('DELETE', bucketName, '200', 'deleteObject',
                 Number.parseInt(objectMD['content-length'], 10));
         }
+        apiSpan.end();
         return cb(err, resHeaders);
     });
 }

lib/api/objectGet.js

@@ -1,5 +1,6 @@
 const { errors, s3middleware } = require('arsenal');
 const { parseRange } = require('arsenal').network.http.utils;
+const opentelemetry = require('@opentelemetry/api');
 
 const { data } = require('../data/wrapper');
 
@@ -25,7 +26,15 @@ const validateHeaders = s3middleware.validateConditionalHeaders;
  * @param {function} callback - callback to function in route
  * @return {undefined}
  */
-function objectGet(authInfo, request, returnTagCount, log, callback) {
+function objectGet(authInfo, request, returnTagCount, log, callback, apiSpan, callAPIMethodSpan) {
+    apiSpan.addEvent('Cloudserver::objectGet() processing objectGet request');
+    apiSpan.setAttribute('code.function', 'objectGet()');
+    apiSpan.setAttribute('code.filepath', 'lib/api/objectGet.js');
+    apiSpan.setAttribute('code.lineno', 32);
+    const ctx = opentelemetry.trace.setSpan(
+        opentelemetry.context.active(),
+        apiSpan,
+    );
     log.debug('processing request', { method: 'objectGet' });
     const bucketName = request.bucketName;
     const objectKey = request.objectKey;
@@ -64,6 +73,7 @@ function objectGet(authInfo, request, returnTagCount, log, callback) {
             return callback(err, null, corsHeaders);
         }
         if (!objMD) {
+            apiSpan.addEvent(versionId ? 'Cloudserver::objectGet() Object version not found' : 'Cloudserver::objectGet() Object not found');
             const err = versionId ? errors.NoSuchVersion : errors.NoSuchKey;
             monitoring.promMetrics(
                 'GET', bucketName, err.code, 'getObject');
@@ -87,6 +97,7 @@ function objectGet(authInfo, request, returnTagCount, log, callback) {
             return callback(errors.MethodNotAllowed, null,
                 responseMetaHeaders);
         }
+        apiSpan.addEvent('Cloudserver::bucketGet() Validating API request headers against object metadata');
         const headerValResult = validateHeaders(request.headers,
             objMD['last-modified'], objMD['content-md5']);
         if (headerValResult.error) {
@@ -233,7 +244,9 @@ function objectGet(authInfo, request, returnTagCount, log, callback) {
                 dataLocator = setPartRanges(dataLocator, byteRange);
             }
         }
+        apiSpan.addEvent('Cloudserver::bucketGet() Trying to get data location using head request');
         return data.head(dataLocator, log, err => {
+            apiSpan.addEvent('Cloudserver::bucketGet() Data location found');
             if (err) {
                 log.error('error from external backend checking for ' +
                 'object existence', { error: err });
@@ -253,9 +266,9 @@ function objectGet(authInfo, request, returnTagCount, log, callback) {
             monitoring.promMetrics('GET', bucketName, '200', 'getObject',
                 Number.parseInt(responseMetaHeaders['Content-Length'], 10));
             return callback(null, dataLocator, responseMetaHeaders,
-                byteRange);
-        });
+                byteRange, apiSpan, callAPIMethodSpan);
         });
+    }, ctx);
 }
 
 module.exports = objectGet;

lib/api/objectHead.js

@@ -1,6 +1,7 @@
 const { errors, s3middleware } = require('arsenal');
 const validateHeaders = s3middleware.validateConditionalHeaders;
 const { parseRange } = require('arsenal').network.http.utils;
+const opentelemetry = require('@opentelemetry/api');
 
 const { decodeVersionId } = require('./apiUtils/object/versioning');
 const collectCorsHeaders = require('../utilities/collectCorsHeaders');
@@ -25,7 +26,15 @@ const { setExpirationHeaders } = require('./apiUtils/object/expirationHeaders');
  * @return {undefined}
  *
  */
-function objectHead(authInfo, request, log, callback) {
+function objectHead(authInfo, request, log, callback, parentSpan) {
+    parentSpan.addEvent('Cloudserver::bucketGet() processing Head Object request');
+    parentSpan.setAttribute('code.function', 'objectHead()');
+    parentSpan.setAttribute('code.filepath', 'lib/api/objectHead.js');
+    parentSpan.setAttribute('code.lineno', 32);
+    const ctx = opentelemetry.trace.setSpan(
+        opentelemetry.context.active(),
+        parentSpan,
+    );
     log.debug('processing request', { method: 'objectHead' });
     const bucketName = request.bucketName;
     const objectKey = request.objectKey;
@@ -160,7 +169,7 @@ function objectHead(authInfo, request, log, callback) {
             });
             monitoring.promMetrics('HEAD', bucketName, '200', 'headObject');
             return callback(null, responseHeaders);
-        });
+        }, ctx);
 }
 
 module.exports = objectHead;

lib/api/objectPut.js

@@ -1,5 +1,6 @@
 const async = require('async');
 const { errors, versioning } = require('arsenal');
+const opentelemetry = require('@opentelemetry/api');
 
 const aclUtils = require('../utilities/aclUtils');
 const { cleanUpBucket } = require('./apiUtils/bucket/bucketCreation');
@@ -39,9 +40,19 @@ const versionIdUtils = versioning.VersionID;
  * (to be used for streaming v4 auth if applicable)
  * @param {object} log - the log request
  * @param {Function} callback - final callback to call with the result
+ * @param {object} apiSpan - APi span
+ * @param {object} methodSpan - method span
  * @return {undefined}
  */
-function objectPut(authInfo, request, streamingV4Params, log, callback) {
+function objectPut(authInfo, request, streamingV4Params, log, callback, authorizationResults, apiSpan, methodSpan) {
+    apiSpan.addEvent('Cloudserver::objectGet() processing objectPut request');
+    apiSpan.setAttribute('code.function', 'objectPut()');
+    apiSpan.setAttribute('code.filepath', 'lib/api/objectPut.js');
+    apiSpan.setAttribute('code.lineno', 50);
+    const ctx = opentelemetry.trace.setSpan(
+        opentelemetry.context.active(),
+        apiSpan,
+    );
     log.debug('processing request', { method: 'objectPut' });
     const {
         bucketName,
@@ -101,12 +112,14 @@ function objectPut(authInfo, request, streamingV4Params, log, callback) {
 
         return async.waterfall([
             function handleTransientOrDeleteBuckets(next) {
+                apiSpan.addEvent('Cloudserver:: handleTransientOrDeleteBuckets');
                 if (bucket.hasTransientFlag() || bucket.hasDeletedFlag()) {
                     return cleanUpBucket(bucket, canonicalID, log, next);
                 }
                 return next();
             },
             function getSSEConfig(next) {
+                apiSpan.addEvent('Cloudserver:: handleTransientOrDeleteBuckets');
                 return getObjectSSEConfiguration(headers, bucket, log,
                     (err, sseConfig) => {
                         if (err) {
@@ -125,17 +138,20 @@ function objectPut(authInfo, request, streamingV4Params, log, callback) {
                 return next(null, null);
             },
             function objectCreateAndStore(cipherBundle, next) {
+                apiSpan.addEvent('Cloudserver:: handleTransientOrDeleteBuckets');
                 const objectLockValidationError
                     = validateHeaders(bucket, headers, log);
                 if (objectLockValidationError) {
                     return next(objectLockValidationError);
                 }
                 writeContinue(request, request._response);
+                apiSpan.addEvent('Cloudserver:: creating and storing object');
                 return createAndStoreObject(bucketName,
                 bucket, objectKey, objMD, authInfo, canonicalID, cipherBundle,
-                request, false, streamingV4Params, overheadField, log, next);
+                request, false, streamingV4Params, overheadField, log, next, apiSpan, methodSpan);
             },
         ], (err, storingResult) => {
+            apiSpan.addEvent('Cloudserver:: stored object metadata and data');
             if (err) {
                 monitoring.promMetrics('PUT', bucketName, err.code,
                     'putObject');
@@ -150,7 +166,7 @@ function objectPut(authInfo, request, streamingV4Params, log, callback) {
                 && !Number.isNaN(request.headers['x-amz-meta-size']))
                 ? Number.parseInt(request.headers['x-amz-meta-size'], 10) : null;
             const newByteLength = parsedContentLength;
-
+            apiSpan.addEvent('Cloudserver:: preparing response headers');
             setExpirationHeaders(responseHeaders, {
                 lifecycleConfig: bucket.getLifecycleConfiguration(),
                 objectParams: {
@@ -199,12 +215,17 @@ function objectPut(authInfo, request, streamingV4Params, log, callback) {
                 location: bucket.getLocationConstraint(),
                 numberOfObjects,
             });
+            apiSpan.end();
             monitoring.promMetrics('PUT', bucketName, '200',
                 'putObject', newByteLength, oldByteLength, isVersionedObj,
                 null, ingestSize);
+            return process.nextTick(() => {
+                methodSpan.addEvent('responding to client');
+                methodSpan.end();
                 return callback(null, responseHeaders);
             });
         });
+    }, ctx);
 }
 
 module.exports = objectPut;

lib/api/serviceGet.js

@@ -51,8 +51,11 @@ function generateXml(xml, owner, userBuckets, splitter) {
  * @param {function} callback - callback
  * @return {undefined}
  */
-function serviceGet(authInfo, request, log, callback) {
+function serviceGet(authInfo, request, log, callback, parentSpan) {
     log.debug('processing request', { method: 'serviceGet' });
+    parentSpan.setAttribute('code.function', 'serviceGet()');
+    parentSpan.setAttribute('code.filepath', 'lib/api/serviceGet.js');
+    parentSpan.setAttribute('code.lineno', 58);
 
     if (authInfo.isRequesterPublicUser()) {
         log.debug('operation not available for public user');
@@ -73,6 +76,7 @@ function serviceGet(authInfo, request, log, callback) {
         '</Owner>',
         '<Buckets>'
     );
+    parentSpan.addEvent('getting metadata');
     return services.getService(authInfo, request, log, constants.splitter,
         (err, userBuckets, splitter) => {
             if (err) {

lib/metadata/metadataUtils.js

@@ -1,5 +1,6 @@
 const async = require('async');
 const { errors } = require('arsenal');
+const opentelemetry = require('@opentelemetry/api');
 
 const metadata = require('./wrapper');
 const BucketInfo = require('arsenal').models.BucketInfo;
@@ -181,9 +182,15 @@ function validateBucket(bucket, params, log, actionImplicitDenies = {}) {
  * @param {boolean} actionImplicitDenies - identity authorization results
  * @param {RequestLogger} log - request logger
  * @param {function} callback - callback
+ * @param {object} tracerContext - tracing context
  * @return {undefined} - and call callback with params err, bucket md
  */
-function standardMetadataValidateBucketAndObj(params, actionImplicitDenies, log, callback) {
+function standardMetadataValidateBucketAndObj(params, actionImplicitDenies, log, callback, tracerContext) {
+    const tracer = opentelemetry.trace.getTracer(process.env.OTEL_SERVICE_NAME);
+    const bucketPolicyAuthSpan = tracer.startSpan('Retrieving Metadata and validating user against bucket policy', undefined, tracerContext);
+    bucketPolicyAuthSpan.setAttribute('code.function', 'standardMetadataValidateBucketAndObj()');
+    bucketPolicyAuthSpan.setAttribute('code.filepath', 'lib/metadata/metadataUtils.js');
+    bucketPolicyAuthSpan.setAttribute('code.lineno', 193);
     const { authInfo, bucketName, objectKey, versionId, getDeleteMarker, request } = params;
     let requestType = params.requestType;
     if (!Array.isArray(requestType)) {
@@ -196,7 +203,15 @@ function standardMetadataValidateBucketAndObj(params, actionImplicitDenies, log,
             if (getDeleteMarker) {
                 getOptions.getDeleteMarker = true;
             }
+            bucketPolicyAuthSpan.addEvent('Cloudserver:: retrieving metadata of bucket and object');
+            const ctx = opentelemetry.trace.setSpan(
+                opentelemetry.context.active(),
+                bucketPolicyAuthSpan,
+            );
+            const metadataSpan = tracer.startSpan('Retrieving metadata', undefined, ctx);
             return metadata.getBucketAndObjectMD(bucketName, objectKey, getOptions, log, (err, getResult) => {
+                metadataSpan.end();
+                bucketPolicyAuthSpan.addEvent('Cloudserver:: retrieved metadata of bucket');
                 if (err) {
                     // if some implicit iamAuthzResults, return AccessDenied
                     // before leaking any state information
@@ -209,6 +224,7 @@ function standardMetadataValidateBucketAndObj(params, actionImplicitDenies, log,
             });
         },
         (getResult, next) => {
+            bucketPolicyAuthSpan.addEvent('Cloudserver:: validating metadata of bucket and object');
             const bucket = getResult.bucket ?
                   BucketInfo.deSerialize(getResult.bucket) : undefined;
             if (!bucket) {
@@ -227,9 +243,11 @@ function standardMetadataValidateBucketAndObj(params, actionImplicitDenies, log,
                 return getNullVersionFromMaster(bucketName, objectKey, log,
                      (err, nullVer) => next(err, bucket, nullVer));
             }
+            bucketPolicyAuthSpan.addEvent('Cloudserver:: bucket and object metadata validated');
             return next(null, bucket, objMD);
         },
         (bucket, objMD, next) => {
+            bucketPolicyAuthSpan.addEvent('Cloudserver:: validating user against bucket policy');
             const canonicalID = authInfo.getCanonicalID();
             if (!isObjAuthorized(bucket, objMD, requestType, canonicalID, authInfo, log, request,
                 actionImplicitDenies)) {
@@ -239,13 +257,18 @@ function standardMetadataValidateBucketAndObj(params, actionImplicitDenies, log,
             return next(null, bucket, objMD);
         },
     ], (err, bucket, objMD) => {
+        bucketPolicyAuthSpan.addEvent('Cloudserver:: user validation done against bucket policy');
         if (err) {
             // still return bucket for cors headers
             return callback(err, bucket);
         }
+        return process.nextTick(() => {
+            bucketPolicyAuthSpan.end();
             return callback(null, bucket, objMD);
         });
+    });
 }
+
 /** standardMetadataValidateBucket - retrieve bucket from metadata and check if user
  * is authorized to access it
  * @param {object} params - function parameters
@@ -256,11 +279,20 @@ function standardMetadataValidateBucketAndObj(params, actionImplicitDenies, log,
  * @param {boolean} actionImplicitDenies - identity authorization results
  * @param {RequestLogger} log - request logger
  * @param {function} callback - callback
+ * @param {object} tracerContext - tracing context
  * @return {undefined} - and call callback with params err, bucket md
  */
-function standardMetadataValidateBucket(params, actionImplicitDenies, log, callback) {
+function standardMetadataValidateBucket(params, actionImplicitDenies, log, callback, tracerContext) {
+    const tracer = opentelemetry.trace.getTracer(process.env.OTEL_SERVICE_NAME);
+    const bucketPolicyAuthSpan = tracer.startSpan('Validating user against bucket policy', undefined, tracerContext);
+    bucketPolicyAuthSpan.setAttribute('code.function', 'standardMetadataValidateBucket()');
+    bucketPolicyAuthSpan.setAttribute('code.filepath', 'lib/metadata/metadataUtils.js');
+    bucketPolicyAuthSpan.setAttribute('code.lineno', 267);
+
     const { bucketName } = params;
+    bucketPolicyAuthSpan.addEvent('Cloudserver:: retrieving metadata of bucket');
     return metadata.getBucket(bucketName, log, (err, bucket) => {
+        bucketPolicyAuthSpan.addEvent('Cloudserver:: retrieved metadata of bucket');
         if (err) {
             // if some implicit actionImplicitDenies, return AccessDenied before
             // leaking any state information
@@ -270,9 +302,14 @@ function standardMetadataValidateBucket(params, actionImplicitDenies, log, callb
             log.debug('metadata getbucket failed', { error: err });
             return callback(err);
         }
+        bucketPolicyAuthSpan.addEvent('Cloudserver:: validating user against bucket policy2');
         const validationError = validateBucket(bucket, params, log, actionImplicitDenies);
+        bucketPolicyAuthSpan.addEvent('Cloudserver:: user validation done against bucket policy');
+        return process.nextTick(() => {
+            bucketPolicyAuthSpan.end();
             return callback(validationError, bucket);
         });
+    });
 }
 
 module.exports = {

lib/server.js

@@ -3,6 +3,7 @@ const https = require('https');
 const cluster = require('cluster');
 const { series } = require('async');
 const arsenal = require('arsenal');
+const opentelemetry = require('@opentelemetry/api');
 const { RedisClient, StatsClient } = arsenal.metrics;
 const monitoringClient = require('./utilities/monitoringHandler');
 const metrics = require('./utilities/metrics');
@@ -89,6 +90,16 @@ class S3Server {
      * @returns {void}
      */
     routeRequest(req, res) {
+        const tracer = opentelemetry.trace.getTracer(process.env.OTEL_SERVICE_NAME);
+        let activeSpan = opentelemetry.trace.getActiveSpan(opentelemetry.context.active());
+        if (!activeSpan) {
+            activeSpan = tracer.startSpan('routeRequest');
+        }
+        
+        activeSpan.addEvent('Cloudserver::routeRequest() Starting routing of request');
+        activeSpan.setAttribute('code.function', 'routeRequest()');
+        activeSpan.setAttribute('code.filepath', 'lib/server.js');
+        activeSpan.setAttribute('code.lineno', 98);
         metrics.httpActiveRequests.inc();
         const requestStartTime = process.hrtime.bigint();
 
@@ -140,7 +151,18 @@ class S3Server {
                 vault,
             },
         };
-        routes(req, res, params, logger, _config);
+        // activeSpan.addEvent('I am going to route the request now');
+        // activeSpan.setAttribute('s3.bucket_name', req.bucketName);
+        // activeSpan.setAttribute('s3.object_key', req.objectKey);
+        // activeSpan.updateName(`${req.method} ${req.bucketName}/${req.objectKey}`);
+    // const v4Span = tracer.startSpan('verifySignatureV4', {
+    //     parent: activeSpan,
+    // });
+        routes(req, res, params, logger, _config, activeSpan, tracer);
+        // return tracer.startActiveSpan('routeRequest', span => {
+        //     routes(req, res, params, logger, _config);
+        //     span.end();
+        // });
     }
 
     /**

lib/services.js

@@ -1,6 +1,7 @@
 const assert = require('assert');
 
 const async = require('async');
+const opentelemetry = require('@opentelemetry/api');
 const { errors, s3middleware } = require('arsenal');
 
 const ObjectMD = require('arsenal').models.ObjectMD;
@@ -308,12 +309,49 @@ const services = {
      * @param {function} cb - callback from async.waterfall in objectGet
      * @return {undefined}
      */
-    deleteObject(bucketName, objectMD, objectKey, options, deferLocationDeletion, log, cb) {
+    deleteObject(bucketName, objectMD, objectKey, options, deferLocationDeletion, log, cb, tracerContext) {
+        const tracer = opentelemetry.trace.getTracer(process.env.OTEL_SERVICE_NAME);
+        
         log.trace('deleting object from bucket');
         assert.strictEqual(typeof bucketName, 'string');
         assert.strictEqual(typeof objectMD, 'object');
 
         function deleteMDandData() {
+            if (tracerContext) {
+                return tracer.startActiveSpan('Delete object metadata', undefined, tracerContext, deleteMdSpan => {
+                    return metadata.deleteObjectMD(bucketName, objectKey, options, log,
+                        (err, res) => {
+                            deleteMdSpan.addEvent('Delete object metadata');
+                            deleteMdSpan.end();
+                            if (err) {
+                                return cb(err, res);
+                            }
+                            log.trace('deleteObject: metadata delete OK');
+                            if (objectMD.location === null) {
+                                return cb(null, res);
+                            }
+
+                            if (deferLocationDeletion) {
+                                return cb(null, Array.isArray(objectMD.location)
+                                    ? objectMD.location : [objectMD.location]);
+                            }
+
+                            if (!Array.isArray(objectMD.location)) {
+                                data.delete(objectMD.location, log);
+                                return cb(null, res);
+                            }
+                            return tracer.startActiveSpan('Batch Deleting Data', undefined, tracerContext, deleteDataSpan => {
+                                return data.batchDelete(objectMD.location, null, null, log, err => {
+                                    deleteDataSpan.end();
+                                    if (err) {
+                                        return cb(err);
+                                    }
+                                    return cb(null, res);
+                                });
+                            });
+                        });
+                });
+            }
             return metadata.deleteObjectMD(bucketName, objectKey, options, log,
                 (err, res) => {
                     if (err) {
@@ -333,7 +371,6 @@ const services = {
                         data.delete(objectMD.location, log);
                         return cb(null, res);
                     }
-
                     return data.batchDelete(objectMD.location, null, null, log, err => {
                         if (err) {
                             return cb(err);
@@ -346,6 +383,19 @@ const services = {
         const objGetInfo = objectMD.location;
         // special case that prevents azure blocks from unecessary deletion
         // will return null if no need
+        if (tracerContext) {
+            return tracer.startActiveSpan('Checking if object is stored in Azure', undefined, tracerContext, objectDeleteSpan => {
+                return data.protectAzureBlocks(bucketName, objectKey, objGetInfo,
+                    log, err => {
+                        objectDeleteSpan.addEvent('Checking if object is stored in Azure');
+                        objectDeleteSpan.end();
+                        if (err) {
+                            return cb(err);
+                        }
+                        return deleteMDandData();
+                    });
+            });
+        }
         return data.protectAzureBlocks(bucketName, objectKey, objGetInfo,
         log, err => {
             if (err) {
@@ -365,12 +415,18 @@ const services = {
      * @return {undefined}
      * JSON response from metastore
      */
-    getObjectListing(bucketName, listingParams, log, cb) {
+    getObjectListing(bucketName, listingParams, log, cb, tracerContext) {
+        const tracer = opentelemetry.trace.getTracer(process.env.OTEL_SERVICE_NAME);
+        const objectListSpan = tracer.startSpan('Listing objects from metadata', undefined, tracerContext);
+        objectListSpan.setAttribute('code.function', 'getObjectListing()');
+        objectListSpan.setAttribute('code.filepath', 'lib/services.js');
+        objectListSpan.setAttribute('code.lineno', 374);
         assert.strictEqual(typeof bucketName, 'string');
         log.trace('performing metadata get object listing',
             { listingParams });
         metadata.listObject(bucketName, listingParams, log,
             (err, listResponse) => {
+                objectListSpan.end();
                 if (err) {
                     log.debug('error from metadata', { error: err });
                     return cb(err);

package.json

@@ -20,7 +20,18 @@
   "homepage": "https://github.com/scality/S3#readme",
   "dependencies": {
     "@hapi/joi": "^17.1.0",
-    "arsenal": "git+https://github.com/scality/arsenal#7.70.29",
+    "@opentelemetry/api": "^1.8.0",
+    "@opentelemetry/auto-instrumentations-node": "^0.46.1",
+    "@opentelemetry/exporter-metrics-otlp-proto": "^0.52.0",
+    "@opentelemetry/exporter-trace-otlp-proto": "^0.52.0",
+    "@opentelemetry/instrumentation-ioredis": "^0.41.0",
+    "@opentelemetry/resources": "^1.24.1",
+    "@opentelemetry/sdk-metrics": "^1.24.1",
+    "@opentelemetry/sdk-node": "^0.51.1",
+    "@opentelemetry/sdk-trace-node": "^1.24.1",
+    "@opentelemetry/sdk-trace-web": "^1.25.0",
+    "@opentelemetry/semantic-conventions": "^1.24.1",
+    "arsenal": "git+https://github.com/scality/Arsenal#1abae5844aaf6a8a9782a30faffda5205760e3b2",
     "async": "~2.5.0",
     "aws-sdk": "2.905.0",
     "azure-storage": "^2.1.0",
@@ -84,7 +95,7 @@
     "start": "npm-run-all --parallel start_dmd start_s3server",
     "start_mdserver": "node mdserver.js",
     "start_dataserver": "node dataserver.js",
-    "start_s3server": "node index.js",
+    "start_s3server": "node --require ./instrumentation.js index.js",
     "start_dmd": "npm-run-all --parallel start_mdserver start_dataserver",
     "start_utapi": "node lib/utapi/utapi.js",
     "utapi_replay": "node lib/utapi/utapiReplay.js",