Automatically create custom node id resource (#5882)

* node id

* comment

* comments

* fix tests

python/ray/tune/ray_trial_executor.py

@@ -496,6 +496,7 @@ class RayTrialExecutor(TrialExecutor):
                     self._committed_resources.get_res_total(name),
                     self._avail_resources.get_res_total(name), name)
                 for name in self._avail_resources.custom_resources
+                if not name.startswith(ray.resource_spec.NODE_ID_PREFIX)
             ])
             if customs:
                 status += " ({})".format(customs)

python/ray/tune/resources.py

@@ -9,6 +9,7 @@ from numbers import Number
 # For compatibility under py2 to consider unicode as str
 from six import string_types
 
+import ray
 from ray.tune import TuneError
 
 logger = logging.getLogger(__name__)
@@ -111,6 +112,7 @@ class Resources(
         custom_summary = ", ".join([
             "{} {}".format(self.get_res_total(res), res)
             for res in self.custom_resources
+            if not res.startswith(ray.resource_spec.NODE_ID_PREFIX)
         ])
         if custom_summary:
             summary += " ({})".format(custom_summary)