Add testing MySQL connectivity

drupal/Dockerfile

@@ -11,7 +11,7 @@ ENV PYTHONUNBUFFERED 1
 
 WORKDIR /app
 
-RUN pip install flask requests
+RUN pip install flask requests mysql-connector-python
 COPY drupal/app.py /app/
 EXPOSE 8080
 

drupal/app.py

@@ -1,32 +1,50 @@
+# encoding: utf-8
+
 from flask import Flask, Response
-import requests, os
+import requests, os, mysql.connector
+from mysql.connector import Error
 
 app = Flask(__name__)
 
 
 @app.route('/')
 def index():
+    # Gather
     solr_dns = os.getenv('SOLR_SERVICE_DNS', 'solr.drupalservices.local')
     solr_url = f'http://{solr_dns}:8983/solr/'
+    rds_endpoint, rds_port = os.getenv('RDS_ENDPOINT', None), int(os.getenv('RDS_PORT', '3306'))
+    db_username, db_password = os.getenv('DB_USERNAME', 'drupal'), os.getenv('DB_PASSWORD', None)
 
-    rds_endpoint, rds_port = os.getenv('RDS_ENDPOINT', '«unknown»'), os.getenv('RDS_PORT', '«unknown»')
-
+    # Solr
     try:
         response = requests.get(solr_url)
         if response.status_code == 200:
-            solr_status = '<pre>✅ Solr OK</pre>'
+            solr_status = f'<pre>✅ Solr at {solr_url} OK</pre>'
         else:
-            solr_status = f'<pre>❌ Solr NOT OK: {response.status_code}</pre>'
+            solr_status = f'<pre>❌ Solr at {solr_url} NOT OK: {response.status_code}</pre>'
     except Exception as e:
-        solr_status = f'<pre>Error: {e}</pre>'
+        solr_status = f'<pre>Cannot access Solr at {solr_url}: {e}</pre>'
+
+    if rds_endpoint is not None and db_password is not None:
+        try:
+            connection = mysql.connector.connect(
+                host=rds_endpoint, port=rds_port, username=db_username, password=db_password
+            )
+            if connection.is_connected(): mysql_status = f'✅ Connection to RDS at {rds_endpoint} ok!'
+            else: mysql_status = f'❌ Cannot connect to RDS at {rds_endpoint}'
+        except Error as ex:
+            mysql_status = f'❌ Error connecting to RDS at {rds_endpoint}: {ex}'
+    else:
+        mysql_status = '🤷 Need both RDS_ENDPOINT and DB_PASSWORD at a minimum to test RDS'
 
     return Response(
         f'''
             <p>Okay, this from Flask, from a Docker container allegedly from ECR (allegedly) 🌍
             </p>
-            <p>RDS is at {rds_endpoint}:{rds_port}.</p>
             <p>The SOLR_SERVICE_DNS is: <code>{solr_dns}</code>, which makes the URL {solr_url}.</p>
             <p>Solr status is {solr_status}.</p>
+            <p>RDS is at {rds_endpoint}:{rds_port} with username {db_username}.</p>
+            <p>MySQL status is {mysql_status}.</p>
             <p>Hope this helps! 🙏</p>
         ''',
         mimetype='text/html'