fix, 2

src/ntp_routes.py

@@ -3,10 +3,12 @@ from loguru import logger
 import json
 import plotly.express as px
 import plotly.graph_objects as po
+import matplotlib.pyplot as plt
 import pandas as pd
 import psycopg
 import sqlalchemy
 import time
+import io
 
 from app import app
 from app import oidc
@@ -118,3 +120,43 @@ def ntpserver():
             dbh.close()
 
 
+@app.route('/plot.png')
+def plot_png():
+    dbh = psycopg.connect()
+    engine = sqlalchemy.create_engine("postgresql+psycopg://", creator=lambda: dbh)
+    query = """
+      select   time_bucket('5 minutes', time) as bucket,
+        device,
+        avg(cast(values->'rootdisp'->>'value'  as float)) as rootdisp,
+        max(cast(values->'stratum'->>'value'  as int)) as stratum
+      from measurements
+      where time >= date_trunc('day', now()) AND time < date_trunc('day', now()) + '1 day'::interval and
+        application = 'TSM' and attributes->>'Label' = 'david'
+      group by bucket, device
+      order by bucket, device
+    """
+    df = pd.read_sql(query, con=engine)
+
+    fig, ax1 = plt.subplots()
+
+    ax1.plot(df['bucket'], df['rootdisp'], 'r-', label='Root Dispersion')
+    ax1.set_xlabel('Time')
+    ax1.set_ylabel('Root Dispersion (ms)', color='r')
+    ax1.tick_params(axis='y', labelcolor='r')
+
+    ax2 = ax1.twinx()
+    ax2.plot(df['bucket'], df['stratum'], 'b-', label='Stratum')
+    ax2.set_ylabel('Stratum', color='b')
+    ax2.tick_params(axis='y', labelcolor='b')
+    ax2.set_yticks(range(int(df['stratum'].min()), int(df['stratum'].max()) + 1))
+
+    fig.suptitle('NTP Server Numbers')
+    fig.tight_layout()
+    
+    img_io = io.BytesIO()
+    plt.savefig(img_io, format='png')
+    img_io.seek(0)
+    plt.close(fig)
+    
+    return Response(img_io, mimetype='image/png')
+

src/requirements.txt

@@ -39,3 +39,5 @@ urllib3==2.3.0
 Werkzeug==3.1.3
 zipp==3.21.0
 pillow==11.1.0
+matplotlib==3.10.1
+