Supervisor container startup health function

supervisor/__main__.py

@@ -2,12 +2,26 @@
 import asyncio
 from concurrent.futures import ThreadPoolExecutor
 import logging
+from pathlib import Path
 import sys
 
 from supervisor import bootstrap
 
 _LOGGER: logging.Logger = logging.getLogger(__name__)
 
+CONTAINER_OS_STARTUP_CHECK = Path("/run/os/startup-marker")
+
+
+def run_os_startup_check_cleanup() -> None:
+    """Cleanup OS startup check."""
+    if not CONTAINER_OS_STARTUP_CHECK.exists():
+        return
+
+    try:
+        CONTAINER_OS_STARTUP_CHECK.unlink()
+    except OSError as err:
+        _LOGGER.warning("Not able to remove the startup health file: %s", err)
+
 
 # pylint: disable=invalid-name
 if __name__ == "__main__":
@@ -30,6 +44,9 @@
     bootstrap.supervisor_debugger(coresys)
     bootstrap.migrate_system_env(coresys)
 
+    # Signal health startup for container
+    run_os_startup_check_cleanup()
+
     _LOGGER.info("Setting up Supervisor")
     loop.run_until_complete(coresys.core.setup())
 

tests/test_main.py

@@ -0,0 +1,17 @@
+"""Testing handling with main."""
+from pathlib import Path
+
+import supervisor.__main__ as main
+
+
+def test_write_state(tmp_path):
+    """Test startup-marker file cleanup."""
+    test_file = Path(tmp_path, "test.file")
+
+    test_file.touch()
+    assert test_file.exists()
+
+    main.CONTAINER_OS_STARTUP_CHECK = test_file
+    main.run_os_startup_check_cleanup()
+
+    assert not test_file.exists()