Add Task.request_external_endpoint() to request external endpoints on…

… supported backends

clearml/backend_api/session/session.py

@@ -815,6 +815,13 @@ def get_worker_host_name(cls):
     def get_clients(cls):
         return cls._client
 
+    @classmethod
+    def verify_feature_set(cls, feature_set):
+        if isinstance(feature_set, str):
+            feature_set = [feature_set]
+        if cls.feature_set not in feature_set:
+            raise ValueError("ClearML-server does not support requested feature set '{}'".format(feature_set))
+
     @staticmethod
     def _version_tuple(v):
         v = tuple(map(int, (v.split("."))))

clearml/task.py

@@ -842,6 +842,123 @@ def should_connect(*keys):
         task._set_startup_info()
         return task
 
+    def request_external_endpoint(
+        self, port, protocol="http", wait=False, wait_interval_seconds=3.0, wait_timeout_seconds=90.0
+    ):
+        # type: (int, str, bool, float, float) -> Optional[Dict]
+        """
+        Request an external endpoint for an application
+
+        :param port: Port the application is listening to
+        :param protocol: As of now, only `http` is supported
+        :param wait: If True, wait for the endpoint to be assigned
+        :param wait_interval_seconds: The poll frequency when waiting for the endpoint
+        :param wait_timeout_seconds: If this timeout is exceeded while waiting for the endpoint,
+            the method will no longer wait and None will be returned
+
+        :return: If wait is False, this method will return None.
+            If no endpoint could be found while waiting, this mehtod returns None.
+            Otherwise, it returns a dictionary containing the following values:
+            - endpoint - raw endpoint. One might need to authenticate in order to use this endpoint
+            - browser_endpoint - endpoint to be used in browser. Authentication will be handled via the browser
+            - port - the port exposed by the application
+            - protocol - the protocol used by the endpoint
+        """
+        Session.verify_feature_set("advanced")
+        if not getattr(self, "_external_endpoint_port", None):
+            self.reload()
+            assigned_port = self._get_runtime_properties().get("_PORT")
+            if assigned_port:
+                self._external_endpoint_port = assigned_port
+        if getattr(self, "_external_endpoint_port", None):
+            if self._external_endpoint_port != port:  # noqa
+                raise ValueError(
+                    "Only one endpoint can be requested at the moment. Port already exposed is: {}".format(
+                        self._external_endpoint_port
+                    )
+                )
+            return
+        # noinspection PyProtectedMember
+        self._set_runtime_properties(
+            {"_SERVICE": "EXTERNAL", "_ADDRESS": get_private_ip(), "_PORT": port}
+        )
+        self.set_system_tags((self.get_system_tags() or []) + ["external_service"])
+        self._external_endpoint_port = port
+        if wait:
+            return self.wait_for_external_endpoint(wait_interval_seconds=wait_interval_seconds)
+        return None
+
+    def wait_for_external_endpoint(self, wait_interval_seconds=3.0, wait_timeout_seconds=90.0):
+        # type: (float) -> Optional[Dict]
+        """
+        Wait for an external endpoint to be assigned
+
+        :param wait_interval_seconds: The poll frequency when waiting for the endpoint
+        :param wait_timeout_seconds: If this timeout is exceeded while waiting for the endpoint,
+            the method will no longer wait
+
+        :return: If no endpoint could be found while waiting, this mehtod returns None.
+            Otherwise, it returns a dictionary containing the following values:
+            - endpoint - raw endpoint. One might need to authenticate in order to use this endpoint
+            - browser_endpoint - endpoint to be used in browser. Authentication will be handled via the browser
+            - port - the port exposed by the application
+            - protocol - the protocol used by the endpoint
+        """
+        Session.verify_feature_set("advanced")
+        if not getattr(self, "_external_endpoint_port", None):
+            LoggerRoot.get_base_logger().warning("No external endpoints have been requested")
+            return None
+        start_time = time.time()
+        while True:
+            self.reload()
+            # noinspection PyProtectedMember
+            runtime_props = self._get_runtime_properties()
+            endpoint = runtime_props.get("endpoint")
+            browser_endpoint = runtime_props.get("browser_endpoint")
+            if not getattr(self, "_external_endpoint_port", None):
+                self._external_endpoint_port = runtime_props.get("_PORT")
+            if endpoint or browser_endpoint:
+                return {
+                    "endpoint": endpoint,
+                    "browser_endpoint": browser_endpoint,
+                    "port": self._external_endpoint_port,
+                    "protocol": "http",
+                }
+            if time.time() >= start_time + wait_timeout_seconds:
+                LoggerRoot.get_base_logger().warning("Timeout exceeded while waiting for endpoint")
+                return None
+            time.sleep(wait_interval_seconds)
+
+    def list_external_endpoints(self):
+        # type: () -> List[Dict]
+        """
+        List all external endpoints assigned
+
+        :return: A list of dictionaries. Each dictionary contains the following values:
+            - endpoint - raw endpoint. One might need to authenticate in order to use this endpoint
+            - browser_endpoint - endpoint to be used in browser. Authentication will be handled via the browser
+            - port - the port exposed by the application
+            - protocol - the protocol used by the endpoint
+        """
+        Session.verify_feature_set("advanced")
+        if not getattr(self, "_external_endpoint_port", None):
+            self.reload()
+            self._external_endpoint_port = self._get_runtime_properties().get("_PORT")
+        if not getattr(self, "_external_endpoint_port", None):
+            LoggerRoot.get_base_logger().warning("No external endpoints have been requested")
+            return []
+        runtime_props = self._get_runtime_properties()
+        endpoint = runtime_props.get("endpoint")
+        browser_endpoint = runtime_props.get("browser_endpoint")
+        return [
+            {
+                "endpoint": endpoint,
+                "browser_endpoint": browser_endpoint,
+                "port": self._external_endpoint_port,
+                "protocol": "http",
+            }
+        ]
+
     @classmethod
     def create(
             cls,