Initial server source import

deploy/host-agent/truf_host_agent.py

@@ -0,0 +1,51 @@
+#!/usr/bin/env python3
+import signal
+import sys
+import threading
+from pathlib import Path
+
+APP_DIRECTORY = Path('/opt/truf/app')
+sys.path.insert(0, str(APP_DIRECTORY))
+
+from host_agent_runtime import FixedHostOperationDispatcher
+from host_agent_server import (
+    HostAgentServerError,
+    inherited_systemd_listener,
+    serve_forever,
+)
+
+
+def main():
+    if len(sys.argv) != 1:
+        raise HostAgentServerError('arguments_forbidden')
+    listener = inherited_systemd_listener()
+    stop_event = threading.Event()
+    dispatcher = FixedHostOperationDispatcher()
+
+    def request_stop(_signum, _frame):
+        stop_event.set()
+
+    signal.signal(signal.SIGTERM, request_stop)
+    signal.signal(signal.SIGINT, request_stop)
+    try:
+        with listener:
+            serve_forever(
+                listener, handler=dispatcher.handle, stop_event=stop_event,
+            )
+    finally:
+        dispatcher.close()
+    return 0
+
+
+if __name__ == '__main__':
+    try:
+        result = main()
+    except BaseException as exc:
+        if not isinstance(exc, Exception):
+            raise
+        print(
+            'host operations agent failed (' + type(exc).__name__ + '); details withheld',
+            file=sys.stderr,
+        )
+        result = 1
+    raise SystemExit(result)