Merge pull request #4149 from omnivore-app/feat/ml-score-v3

V3 scoring model, add prom monitoring

ml/digest-score/app.py

@@ -1,5 +1,6 @@
 import logging
 from flask import Flask, request, jsonify
+from prometheus_client import start_http_server, Histogram, Summary, Counter, generate_latest
 
 from typing import List
 from timeit import default_timer as timer
@@ -7,7 +8,6 @@ from timeit import default_timer as timer
 import os
 import sys
 import json
-import pytz
 import pickle
 import numpy as np
 import pandas as pd
@@ -16,17 +16,53 @@ from urllib.parse import urlparse
 from datetime import datetime
 import dateutil.parser
 from google.cloud import storage
+
+import concurrent.futures
+from threading import Lock, RLock
+from collections import ChainMap
+import copy
+
 from features.user_history import FEATURE_COLUMNS
+from auth import user_token_required, admin_token_required
+
+
+class ThreadSafeUserFeatures:
+  def __init__(self):
+    self._data = {}
+    self._lock = RLock()
+
+  def get(self):
+    with self._lock:
+      return dict(self._data)
+
+  def update(self, new_features):
+    with self._lock:
+      self._data.update(new_features)
+
 
 app = Flask(__name__)
 logging.basicConfig(level=logging.INFO, stream=sys.stdout)
 
-
 USER_HISTORY_PATH = 'user_features.pkl'
-MODEL_PIPELINE_PATH = 'predict_read_pipeline-v002.pkl'
+MODEL_PIPELINE_PATH = 'predict_read_model-v003.pkl'
 
 pipeline = None
-user_features = None
+user_features_store = ThreadSafeUserFeatures()
+
+
+# these buckets are used for reporting scores, we want to make sure
+# there is decent diversity in the returned scores.
+score_bucket_ranges = [0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0]
+score_buckets = {
+    f'score_bucket_{int(b * 10)}': Counter(f'inference_score_bucket_{int(b * 10)}', f'Number of scores in the range {b - 0.1:.1f} to {b:.1f}')
+    for b in score_bucket_ranges
+}
+
+def observe_score(score):
+  for b in score_bucket_ranges:
+    if b - 0.1 < score <= b:
+      score_buckets[f'score_bucket_{int(b * 10)}'].inc()
+      break
 
 def download_from_gcs(bucket_name, gcs_path, destination_path):
   storage_client = storage.Client()
@@ -72,31 +108,39 @@ def merge_dicts(dict1, dict2):
       dict1[key] = value
   return dict1
 
+def predict_proba_wrapper(X):
+  return pipeline.predict_proba(X)
+
+
 def refresh_data():
   start = timer()
   global pipeline
-  global user_features
+  if os.getenv('LOAD_LOCAL_MODEL') == None:
-  if os.getenv('LOAD_LOCAL_MODEL') != None:
+    app.logger.info(f"loading data from {os.getenv('GCS_BUCKET')}")
     gcs_bucket_name = os.getenv('GCS_BUCKET')
-    download_from_gcs(gcs_bucket_name, f'data/features/user_features.pkl', USER_HISTORY_PATH)
+    download_from_gcs(gcs_bucket_name, f'data/features/{USER_HISTORY_PATH}', USER_HISTORY_PATH)
-    download_from_gcs(gcs_bucket_name, f'data/models/predict_read_pipeline-v002.pkl', MODEL_PIPELINE_PATH)
+    download_from_gcs(gcs_bucket_name, f'data/models/{MODEL_PIPELINE_PATH}', MODEL_PIPELINE_PATH)
   pipeline = load_pipeline(MODEL_PIPELINE_PATH)
-  user_features = load_user_features(USER_HISTORY_PATH)
+
-  end = timer()
+  new_features = load_user_features(USER_HISTORY_PATH)
-  print('time to refresh data (in seconds):', end - start)
+  user_features_store.update(new_features)
-  print('loaded pipeline:', pipeline)
+
-  print('loaded number of user_features:', len(user_features))
+  app.logger.info(f'time to refresh data (in seconds): {timer() - start}')
+  app.logger.info(f'loaded pipeline: {pipeline}')
+  app.logger.info(f'loaded number of user_features: {len(new_features)}')
 
 
-def compute_score(user_id, item_features):
+def compute_score(user_id, item_features, user_features):
-  interaction_score = compute_interaction_score(user_id, item_features)
+  interaction_score = compute_interaction_score(user_id, item_features, user_features)
+  observe_score(interaction_score)
   return {
     'score': interaction_score,
     'interaction_score': interaction_score,
   }
 
 
-def compute_interaction_score(user_id, item_features):
+def compute_interaction_score(user_id, item_features, user_features):
+  start = timer()
   original_url_host = urlparse(item_features.get('original_url')).netloc
   df_test = pd.DataFrame([{
     'user_id': user_id,
@@ -134,35 +178,69 @@ def compute_interaction_score(user_id, item_features):
     else:
       print("skipping feature: ", name)
       continue
-
     df_test = pd.merge(df_test, df, on=merge_keys, how='left')
   df_test = df_test.fillna(0)
   df_predict = df_test[FEATURE_COLUMNS]
 
+  infer_start = timer()
   interaction_score = pipeline.predict_proba(df_predict)
-  print('score', interaction_score, 'item_features', df_test[df_test != 0].stack())
+  app.logger.info(f'time to call infer (in seconds): {timer() - infer_start}')
+
+  app.logger.info(f'INTERACTION SCORE: {interaction_score}')
+  app.logger.info(f'item_features:\n{df_predict[df_predict != 0].stack()}')
+  app.logger.info(f'time to compute score (in seconds): {timer() - start}')
+
+  return np.float64(interaction_score[0][1])
+
+
+def process_parallel_item(user_id, key, item, user_features):
+  library_item_id = item['library_item_id']
+  return library_item_id, compute_score(user_id, item, user_features)
+
+def parallel_compute_scores(user_id, items, max_workers=None):
+  user_features = user_features_store.get()
+  result = {}
+  with concurrent.futures.ThreadPoolExecutor(max_workers=max_workers) as executor:
+    future_to_item = {executor.submit(process_parallel_item, user_id, key, item, user_features): (key, item) 
+                      for key, item in items.items()}
+    
+  for future in concurrent.futures.as_completed(future_to_item):
+    key, item = future_to_item[future]
+    try:
+      library_item_id, score = future.result()
+      result[library_item_id] = score
+    except Exception as exc:
+      app.logger.error(f'Item {key} generated an exception: {exc}')
+  return result
 
-  return interaction_score[0][1]
 
 
 @app.route('/_ah/health', methods=['GET'])
 def ready():
   return jsonify({'OK': 'yes'}), 200
 
+@app.route('/metrics')
+def metrics():
+  return generate_latest(), 200, {'Content-Type': 'text/plain; charset=utf-8'}
+
 
 @app.route('/refresh', methods=['GET'])
+@admin_token_required
 def refresh():
   refresh_data()
   return jsonify({'OK': 'yes'}), 200
 
 
 @app.route('/users/<user_id>/features', methods=['GET'])
+@admin_token_required
 def get_user_features(user_id):
   result = {}
   df_user = pd.DataFrame([{
     'user_id': user_id,
   }])
 
+  user_features = user_features_store.get()
+
   user_data = {}
   for name, df in user_features.items():
     df = df[df['user_id'] == user_id]
@@ -173,18 +251,20 @@ def get_user_features(user_id):
 
 
 @app.route('/predict', methods=['POST'])
+@user_token_required
 def predict():
   try:
     data = request.get_json()
     app.logger.info(f"predict scoring request: {data}")
 
-    user_id = data.get('user_id')
+    user_id = request.user_id
     item_features = data.get('item_features')
 
     if user_id is None:
         return jsonify({'error': 'Missing user_id'}), 400
 
-    score = compute_score(user_id, item_features)
+    user_features = user_features_store.get()
+    score = compute_score(user_id, item_features, user_features)
     return jsonify({'score': score})
   except Exception as e:
     app.logger.error(f"exception in predict endpoint: {request.get_json()}\n{e}")
@@ -192,24 +272,20 @@ def predict():
 
 
 @app.route('/batch', methods=['POST'])
+@user_token_required
 def batch():
+  start = timer()
   try:
-    result = {}
     data = request.get_json()
-    app.logger.info(f"batch scoring request: {data}")
-
-    user_id = data.get('user_id')
     items = data.get('items')
+    user_id = request.user_id
+    if user_id == None:
+      return jsonify({'error': 'no user_id supplied'}), 400
+    if len(items) > 101:
+      return jsonify({'error': f'too many items: {len(items)}'}), 400
+    result = parallel_compute_scores(user_id, items)
 
-    if user_id is None:
+    app.logger.info(f'time to compute batch of {len(items)} items (in seconds): {timer() - start}')
-        return jsonify({'error': 'Missing user_id'}), 400
-
-    for key, item in items.items():
-      print('key": ', key)
-      print('item: ', item)
-      library_item_id = item['library_item_id']
-      result[library_item_id] = compute_score(user_id, item)
-
     return jsonify(result)
   except Exception as e:
     app.logger.error(f"exception in batch endpoint: {request.get_json()}\n{e}")

ml/digest-score/auth.py

@@ -0,0 +1,58 @@
+import os
+import jwt
+from flask import request, jsonify
+from functools import wraps
+from datetime import datetime, timedelta
+
+
+SECRET_KEY = os.getenv('JWT_SECRET')
+ADMIN_SECRET_KEY = os.getenv('JWT_ADMIN_SECRET_KEY')
+
+def generate_admin_token():
+  expiration_time = datetime.utcnow() + timedelta(minutes=5)
+  payload = {
+      'role': 'admin',
+      'exp': expiration_time
+  }
+
+  token = jwt.encode(payload, ADMIN_SECRET_KEY, algorithm="HS256")
+  return token
+
+
+def user_token_required(f):
+    @wraps(f)
+    def decorated(*args, **kwargs):
+        token = None
+        if 'Authorization' in request.headers:
+            print("request.headers['Authorization'].split(" ")[1]", request.headers['Authorization'].split(" ")[1])
+            token = request.headers['Authorization'].split(" ")[1]
+        if not token:
+            return jsonify({'message': 'Token is missing!'}), 401
+        try:
+            data = jwt.decode(token, SECRET_KEY, algorithms=["HS256"])
+            request.user_id = data['uid']
+        except jwt.ExpiredSignatureError:
+            return jsonify({'message': 'Token has expired!'}), 401
+        except jwt.InvalidTokenError:
+            return jsonify({'message': 'Token is invalid!'}), 401
+        return f(*args, **kwargs)
+    return decorated
+
+def admin_token_required(f):
+    @wraps(f)
+    def decorated(*args, **kwargs):
+        token = None
+        if 'Authorization' in request.headers:
+            token = request.headers['Authorization'].split(" ")[1]
+        if not token:
+            return jsonify({'message': 'Token is missing!'}), 401
+        try:
+            data = jwt.decode(token, ADMIN_SECRET_KEY, algorithms=["HS256"])
+            if data['role'] != 'admin':
+                return jsonify({'message': 'Admin token required!'}), 403
+        except jwt.ExpiredSignatureError:
+            return jsonify({'message': 'Token has expired!'}), 401
+        except jwt.InvalidTokenError:
+            return jsonify({'message': 'Token is invalid!'}), 401
+        return f(*args, **kwargs)
+    return decorated

ml/digest-score/features.py

@@ -7,6 +7,7 @@ from datetime import datetime, timedelta
 import os
 from io import BytesIO
 import tempfile
+import requests
 
 import pyarrow as pa
 import pyarrow.parquet as pq
@@ -15,16 +16,41 @@ from google.cloud import storage
 from features.extract import extract_and_upload_raw_data
 from features.user_history import generate_and_upload_user_history
 
+from datetime import datetime, timezone
+from auth import generate_admin_token
+
+
+def call_refresh_api(api):
+  headers = {
+    'Authorization': f'Bearer {generate_admin_token()}'
+  }
+  try:
+    response = requests.get(api, headers=headers, timeout=10)
+    if response.status_code == 200:
+        print("scoring service refreshed")
+    else:
+        print(f"failed to refresh scoring service: {response.status_code}")
+  except requests.exceptions.Timeout:
+      print(f"The request timed out after {timeout} seconds")
+  except requests.exceptions.RequestException as e:
+      print(f"An error occurred while refreshing scoring service: {e}")
 
 
 def main():
-  execution_date = os.getenv('EXECUTION_DATE')
+  score_service = os.getenv("SCORING_SERVICE_URL")
   num_days_history = os.getenv('NUM_DAYS_HISTORY')
   gcs_bucket_name = os.getenv('GCS_BUCKET')
 
+  current_date_utc = datetime.now(timezone.utc)
+  execution_date = current_date_utc.strftime("%Y-%m-%d")
+  print(f'updating features using execution date: {execution_date}')
+
   extract_and_upload_raw_data(execution_date, num_days_history, gcs_bucket_name)
   generate_and_upload_user_history(execution_date, gcs_bucket_name)
 
+  if score_service:
+    call_refresh_api(score_service)
+
   print("done")
 
 if __name__ == "__main__":

ml/digest-score/features/user_history.py

@@ -17,65 +17,30 @@ import pyarrow.feather as feather
 from google.cloud import storage
 
 FEATURE_COLUMNS=[
-  # targets 
+  'user_subscription_rate_week_1', 
-  # 'user_clicked', 'user_read', 'user_long_read',
+  'user_subscription_proportion_week_1',
-
+  'user_site_rate_week_3', 
-  # item attributes / user setup attributes
+  'user_site_proportion_week_3',
-  'item_word_count','item_has_site_icon', 'is_subscription',
+  'user_site_rate_week_2', 
-  'inbox_folder', 'has_author',
+  'user_site_proportion_week_2',
-
+  'user_subscription_rate_week_2', 
-  # how the user has setup the subscription
+  'user_subscription_proportion_week_2',
-  'is_newsletter', 'is_feed', 'days_since_subscribed',
+  'user_site_rate_week_1', 
-  'subscription_count', 'subscription_auto_add_to_library', 
+  'user_site_proportion_week_1',
-  'subscription_fetch_content',
+  'user_subscription_rate_week_3', 
-
+  'user_subscription_proportion_week_3',
-  # user/item interaction history
+  'user_author_rate_week_4',
-  'user_original_url_host_saved_count_week_1',
+  'user_author_proportion_week_4', 
-  'user_original_url_host_interaction_count_week_1',
+  'user_author_rate_week_1',
-  'user_original_url_host_rate_week_1',
+  'user_author_proportion_week_1', 
-  'user_original_url_host_proportion_week_1',
+  'user_site_rate_week_4',
-
+  'user_site_proportion_week_4', 
-  'user_original_url_host_saved_count_week_2',
+  'user_author_rate_week_2',
-  'user_original_url_host_interaction_count_week_2',
+  'user_author_proportion_week_2',  
-  'user_original_url_host_rate_week_2',
+  'user_author_rate_week_3',
-  'user_original_url_host_proportion_week_2',
+  'user_author_proportion_week_3', 
-  'user_original_url_host_saved_count_week_3',
+  'user_subscription_rate_week_4', 
-  'user_original_url_host_interaction_count_week_3',
+  'user_subscription_proportion_week_4'
-  'user_original_url_host_rate_week_3',
-  'user_original_url_host_proportion_week_3',
-  'user_original_url_host_saved_count_week_4',
-  'user_original_url_host_interaction_count_week_4',
-  'user_original_url_host_rate_week_4',
-  'user_original_url_host_proportion_week_4',
-
-  'user_subscription_saved_count_week_1',
-  'user_subscription_interaction_count_week_1',
-  'user_subscription_rate_week_1', 'user_subscription_proportion_week_1',
-  'user_site_saved_count_week_3', 'user_site_interaction_count_week_3',
-  'user_site_rate_week_3', 'user_site_proportion_week_3',
-  'user_site_saved_count_week_2', 'user_site_interaction_count_week_2',
-  'user_site_rate_week_2', 'user_site_proportion_week_2',
-  'user_subscription_saved_count_week_2',
-  'user_subscription_interaction_count_week_2',
-  'user_subscription_rate_week_2', 'user_subscription_proportion_week_2',
-  'user_site_saved_count_week_1', 'user_site_interaction_count_week_1',
-  'user_site_rate_week_1', 'user_site_proportion_week_1',
-  'user_subscription_saved_count_week_3',
-  'user_subscription_interaction_count_week_3',
-  'user_subscription_rate_week_3', 'user_subscription_proportion_week_3',
-  'user_author_saved_count_week_4',
-  'user_author_interaction_count_week_4', 'user_author_rate_week_4',
-  'user_author_proportion_week_4', 'user_author_saved_count_week_1',
-  'user_author_interaction_count_week_1', 'user_author_rate_week_1',
-  'user_author_proportion_week_1', 'user_site_saved_count_week_4',
-  'user_site_interaction_count_week_4', 'user_site_rate_week_4',
-  'user_site_proportion_week_4', 'user_author_saved_count_week_2',
-  'user_author_interaction_count_week_2', 'user_author_rate_week_2',
-  'user_author_proportion_week_2', 'user_author_saved_count_week_3',
-  'user_author_interaction_count_week_3', 'user_author_rate_week_3',
-  'user_author_proportion_week_3', 'user_subscription_saved_count_week_4',
-  'user_subscription_interaction_count_week_4',
-  'user_subscription_rate_week_4', 'user_subscription_proportion_week_4'
 ]
 
 def parquet_to_dataframe(file_path):

ml/digest-score/requirements.txt

@@ -6,5 +6,9 @@ google-cloud-storage
 flask
 pydantic
 sklearn2pmml
-sqlalchemy 
+sqlalchemy
 pyarrow
+requests
+PyJWT
+prometheus_client
+xgboost==2.1.0

ml/digest-score/train.py

@@ -1,17 +1,11 @@
-import pandas as pd
 import os
+import pandas as pd
 import numpy as np
 from datetime import datetime, timedelta
 
-from sklearn.linear_model import SGDClassifier
+import xgboost as xgb
-from sklearn.ensemble import RandomForestClassifier, VotingClassifier
+from sklearn.metrics import classification_report
-
-from sklearn.preprocessing import StandardScaler
-
-from sklearn.metrics import accuracy_score, precision_score, recall_score, f1_score, classification_report, confusion_matrix
-from sklearn.utils import shuffle
 from sklearn.model_selection import train_test_split
-from sklearn2pmml import PMMLPipeline, sklearn2pmml
 
 from google.cloud import storage
 from google.cloud.exceptions import PreconditionFailed
@@ -23,13 +17,6 @@ import pyarrow.feather as feather
 
 from features.user_history import FEATURE_COLUMNS
 
-DB_PARAMS = {
-    'dbname': os.getenv('DB_NAME') or 'omnivore',
-    'user': os.getenv('DB_USER'),
-    'password': os.getenv('DB_PASSWORD'),
-    'host': os.getenv('DB_HOST') or 'localhost',
-    'port': os.getenv('DB_PORT') or '5432'
-}
 
 def parquet_to_dataframe(file_path):
     table = pq.read_table(file_path)
@@ -122,58 +109,15 @@ def prepare_data(df):
 
     return X, Y
 
-def train_random_forest_model(X, Y):
-    model = RandomForestClassifier(
-        class_weight={0: 1, 1: 10}, 
-        n_estimators=10, 
-        max_depth=10, 
-        random_state=42
-    )
 
-    scaler = StandardScaler()
+def train_xgb_model(X, Y):
-    X_scaled = scaler.fit_transform(X)
+    X_train, X_test, y_train, y_test = train_test_split(X, Y, test_size=0.2, random_state=42)
+    model = xgb.XGBClassifier(max_depth=7, n_estimators=5)
+    model.fit(X_train, y_train)
 
-    X_train, X_test, Y_train, Y_test = train_test_split(X_scaled, Y, test_size=0.3, random_state=42)
+    y_pred = model.predict(X_test)
-
+    print(classification_report(y_test, y_pred))
-    pipeline = PMMLPipeline([
+    return model
-        ("scaler", scaler),
-        ("classifier", model)
-    ])
-
-    pipeline.fit(X_train, Y_train)
-
-    Y_pred = pipeline.predict(X_test)
-    print_classification_report(Y_test, Y_pred)
-    print_feature_importance(X, model)
-
-    return pipeline
-
-
-def print_feature_importance(X, rf):
-    # Get feature importances
-    importances = rf.feature_importances_
-
-    # Get the indices of the features sorted by importance
-    indices = np.argsort(importances)[::-1]
-
-    # Print the feature ranking
-    print("Feature ranking:")
-
-    for f in range(X.shape[1]):
-        print(f"{f + 1}. feature {indices[f]} ({importances[indices[f]]:.4f}) - {X.columns[indices[f]]}")
-
-
-
-def print_classification_report(Y_test, Y_pred):
-    report = classification_report(Y_test, Y_pred, target_names=['Not Clicked', 'Clicked'], output_dict=True)
-    print("Classification Report:")
-    print(f"Accuracy: {report['accuracy']:.4f}")
-    print(f"Precision (Not Clicked): {report['Not Clicked']['precision']:.4f}")
-    print(f"Recall (Not Clicked): {report['Not Clicked']['recall']:.4f}")
-    print(f"F1-Score (Not Clicked): {report['Not Clicked']['f1-score']:.4f}")
-    print(f"Precision (Clicked): {report['Clicked']['precision']:.4f}")
-    print(f"Recall (Clicked): {report['Clicked']['recall']:.4f}")
-    print(f"F1-Score (Clicked): {report['Clicked']['f1-score']:.4f}")
 
 
 def main():
@@ -181,24 +125,23 @@ def main():
     num_days_history = os.getenv('NUM_DAYS_HISTORY')
     gcs_bucket_name = os.getenv('GCS_BUCKET')
 
-    raw_data_path = f'raw_library_items_${execution_date}.parquet'
+    raw_data_path = f'raw_library_items_{execution_date}.parquet'
     user_history_path = 'features_user_features.pkl'
     pipeline_path = 'predict_read_pipeline-v002.pkl'
+    model_path  = 'predict_read_model-v003.pkl'
 
     download_from_gcs(gcs_bucket_name, f'data/features/user_features.pkl', user_history_path)
     download_from_gcs(gcs_bucket_name, f'data/raw/library_items_{execution_date}.parquet', raw_data_path)
 
-    sampled_raw_df = load_and_sample_library_items_from_parquet(raw_data_path, 0.10)
+    sampled_raw_df = load_and_sample_library_items_from_parquet(raw_data_path, 0.95)
     user_history = load_dataframes_from_pickle(user_history_path)
 
     merged_df = merge_user_preference_data(sampled_raw_df, user_history)
 
-    print("created merged data", merged_df.columns)
-
     X, Y = prepare_data(merged_df)
-    random_forest_pipeline = train_random_forest_model(X, Y)
+    xgb_model = train_xgb_model(X, Y)
-    save_to_pickle(random_forest_pipeline, pipeline_path)
+    save_to_pickle(xgb_model, model_path)
-    upload_to_gcs(gcs_bucket_name, pipeline_path, f'data/models/{pipeline_path}')
+    upload_to_gcs(gcs_bucket_name, model_path, f'data/models/{model_path}')
 
 
 if __name__ == "__main__":

packages/api/src/services/score.ts

@@ -3,6 +3,7 @@ import client from 'prom-client'
 import { env } from '../env'
 import { registerMetric } from '../prometheus'
 import { logError } from '../utils/logger'
+import { createWebAuthToken } from '../routers/auth/jwt_helpers'
 
 export interface Feature {
   library_item_id?: string
@@ -79,8 +80,13 @@ class ScoreClientImpl implements ScoreClient {
     const start = Date.now()
 
     try {
+      const authToken = await createWebAuthToken(data.user_id)
+      if (!authToken) {
+        throw Error('could not create auth token')
+      }
       const response = await axios.post<ScoreApiResponse>(this.apiUrl, data, {
         headers: {
+          Authorization: `Bearer ${authToken}`,
           'Content-Type': 'application/json',
         },
         timeout: 20000, // 20 seconds