Added crashing container app

Author: kchandan

crashing-app/Dockerfile

@@ -0,0 +1,7 @@
+FROM python:3.9-slim-buster
+
+WORKDIR /app
+
+COPY app.py .
+
+CMD ["python", "app.py"]

crashing-app/app.py

@@ -0,0 +1,34 @@
+import time
+import os
+import sys
+
+def simulate_app():
+    """Simulates an application that crashes deterministically."""
+
+    # Simulate out-of-memory (OOM) kill (likely to be fixed with resource limits)
+    print("Simulating OOM kill (allocating 600MB)...")
+    big_list = [bytearray(1024 * 1024) for _ in range(600)]  # Roughly 600MB
+    time.sleep(1)  # To show the message before crash.
+
+
+    # Simulate a crash due to an environment variable being absent
+    print("Simulating missing environment variable 'REQUIRED_ENV_VAR'...")
+    if not os.environ.get("REQUIRED_ENV_VAR"):
+        print("Environment variable REQUIRED_ENV_VAR not set. Exiting.")
+        sys.exit(1)
+
+    # Simulate a crash due to a file not existing.
+    print("Simulating missing file 'missing_file.txt'...")
+    try:
+        with open("/data/missing_file.txt", "r") as f:
+            pass
+    except FileNotFoundError:
+        print("missing_file.txt not found. Exiting")
+        sys.exit(1)
+
+    # Simulate normal operation (this will never be reached in this deterministic version)
+    print("Application running normally...")
+    time.sleep(5)
+
+if __name__ == "__main__":
+    simulate_app()