Add healthcheck support

scl.py

@@ -17,6 +17,7 @@ from sqlalchemy.orm import DeclarativeBase, Mapped, Session, mapped_column
 
 from geospatial import DBGeometry, convert_outage_geometry
 
+REQUESTS_HEADERS = {"User-Agent": "seattlecitylight-mastodon-bot"}
 post_datetime_format = "%b %e %l:%M %p"
 
 scl_events_url = "https://utilisocial.io/datacapable/v2/p/scl/map/events"
@@ -38,6 +39,34 @@ mastodon_client = Mastodon(
     api_base_url=config["mastodon"]["api_base_url"],
 )
 
+try:
+    mastodon_client.account_verify_credentials()
+except Exception:
+    print("Mastodon health check failed")
+    raise
+
+if config["nominatim"]["health_check_url"]:
+    try:
+        health_check_response = requests.get(
+            config["nominatim"]["health_check_url"],
+            headers=REQUESTS_HEADERS,
+            timeout=10,
+        )
+        assert health_check_response.ok
+    except Exception:
+        print("Nominatim health check failed")
+        raise
+
+if config["osm"]["health_check_url"]:
+    try:
+        health_check_response = requests.get(
+            config["osm"]["health_check_url"], headers=REQUESTS_HEADERS, timeout=10
+        )
+        assert health_check_response.ok
+    except Exception:
+        print("OSM health check failed")
+        raise
+
 
 class AttribStaticMap(staticmap.StaticMap, object):
     def __init__(self, *args, **kwargs):
@@ -168,8 +197,7 @@ def do_initial_post(
                 lat=outage_center.y,
                 lon=outage_center.x,
             )
-            geocode_headers = {"User-Agent": "seattlecitylight-mastodon-bot"}
-            geocode_response = requests.get(geocode_url, headers=geocode_headers)
+            geocode_response = requests.get(geocode_url, headers=REQUESTS_HEADERS)
             try:
                 geocode = geocode_response.json()
             except requests.JSONDecodeError: