Revert "Enable the Ray dashboard by default (#5976)" (#6068)

This reverts commit 6166ef3e09.

python/ray/dashboard/dashboard.py

@@ -415,6 +415,7 @@ if __name__ == "__main__":
         "--host",
         required=True,
         type=str,
+        choices=["127.0.0.1", "0.0.0.0"],
         help="The host to use for the HTTP server.")
     parser.add_argument(
         "--port",

python/ray/node.py

@@ -579,9 +579,6 @@ class Node(object):
         # The dashboard is Python3.x only.
         if PY3 and self._ray_params.include_webui:
             self.start_dashboard()
-        else:
-            logger.info(
-                "To enable the Ray Web UI, run `pip install ray[dashboard]`.")
 
     def start_ray_processes(self):
         """Start all of the processes on the node."""

python/ray/parameter.py

@@ -58,8 +58,8 @@ class RayParams(object):
         include_webui: Boolean flag indicating whether to start the web
             UI, which displays the status of the Ray cluster.
         webui_host: The host to bind the web UI server to. Can either be
-            localhost (127.0.0.1) or 0.0.0.0 (available from all interfaces).
-            By default, this is set to localhost to prevent access from
+            127.0.0.1 (localhost) or 0.0.0.0 (available from all interfaces).
+            By default, this is set to 127.0.0.1 to prevent access from
             external machines.
         logging_level: Logging level, default will be logging.INFO.
         logging_format: Logging format, default contains a timestamp,
@@ -108,7 +108,7 @@ class RayParams(object):
                  worker_path=None,
                  huge_pages=False,
                  include_webui=None,
-                 webui_host="localhost",
+                 webui_host="127.0.0.1",
                  logging_level=logging.INFO,
                  logging_format=ray_constants.LOGGER_FORMAT,
                  plasma_store_socket_name=None,

python/ray/scripts/scripts.py

@@ -165,10 +165,11 @@ def cli(logging_level, logging_format):
 @click.option(
     "--webui-host",
     required=False,
-    default="localhost",
-    help="The host to bind the web UI server to. Can either be localhost "
-    "(127.0.0.1) or 0.0.0.0 (available from all interfaces). By default, this "
-    "is set to localhost to prevent access from external machines.")
+    type=click.Choice(["127.0.0.1", "0.0.0.0"]),
+    default="127.0.0.1",
+    help="The host to bind the web UI server to. Can either be 127.0.0.1 "
+    "(localhost) or 0.0.0.0 (available from all interfaces). By default, this "
+    "is set to 127.0.0.1 to prevent access from external machines.")
 @click.option(
     "--block",
     is_flag=True,

python/ray/services.py

@@ -12,10 +12,10 @@ import resource
 import socket
 import subprocess
 import sys
+import textwrap
 import time
 import redis
 
-import colorama
 import pyarrow
 # Ray modules
 import ray
@@ -1035,11 +1035,21 @@ def start_dashboard(host,
         ray_constants.PROCESS_TYPE_DASHBOARD,
         stdout_file=stdout_file,
         stderr_file=stderr_file)
-    dashboard_url = "{}:{}".format(
-        host if host != "0.0.0.0" else get_node_ip_address(), port)
-    logger.info("View the Ray dashboard at {}{}{}{}{}.".format(
-        colorama.Style.BRIGHT, colorama.Fore.GREEN, dashboard_url,
-        colorama.Fore.RESET, colorama.Style.NORMAL))
+    dashboard_url = "http://{}:{}".format(
+        host if host == "127.0.0.1" else get_node_ip_address(), port)
+    print("\n" + "=" * 70)
+    print("View the dashboard at {}.".format(dashboard_url))
+    if host == "127.0.0.1":
+        note = (
+            "Note: If Ray is running on a remote node, you will need to set "
+            "up an SSH tunnel with local port forwarding in order to access "
+            "the dashboard in your browser, e.g. by running "
+            "'ssh -L {}:{}:{} <username>@<host>'. Alternatively, you can set "
+            "webui_host=\"0.0.0.0\" in the call to ray.init() to allow direct "
+            "access from external machines.")
+        note = note.format(port, host, port)
+        print("\n".join(textwrap.wrap(note, width=70)))
+    print("=" * 70 + "\n")
     return dashboard_url, process_info
 
 

python/ray/tests/test_webui.py

@@ -19,13 +19,12 @@ def test_get_webui(shutdown_only):
     webui_url = addresses["webui_url"]
     assert ray.get_webui_url() == webui_url
 
-    assert re.match(r"^(localhost|\d+\.\d+\.\d+\.\d+):8080$", webui_url)
+    assert re.match(r"^http://\d+\.\d+\.\d+\.\d+:8080$", webui_url)
 
     start_time = time.time()
     while True:
         try:
-            node_info = requests.get("http://" + webui_url +
-                                     "/api/node_info").json()
+            node_info = requests.get(webui_url + "/api/node_info").json()
             break
         except requests.exceptions.ConnectionError:
             if time.time() > start_time + 30:

python/ray/worker.py

@@ -76,11 +76,6 @@ ERROR_KEY_PREFIX = b"Error:"
 # entry/init points.
 logger = logging.getLogger(__name__)
 
-try:
-    import aiohttp
-except ImportError:
-    aiohttp = None
-
 try:
     import setproctitle
 except ImportError:
@@ -844,8 +839,8 @@ def init(address=None,
          redis_password=None,
          plasma_directory=None,
          huge_pages=False,
-         include_webui=aiohttp is not None,
-         webui_host="localhost",
+         include_webui=False,
+         webui_host="127.0.0.1",
          job_id=None,
          configure_logging=True,
          logging_level=logging.INFO,
@@ -926,8 +921,8 @@ def init(address=None,
         include_webui: Boolean flag indicating whether to start the web
             UI, which displays the status of the Ray cluster.
         webui_host: The host to bind the web UI server to. Can either be
-            localhost (127.0.0.1) or 0.0.0.0 (available from all interfaces).
-            By default, this is set to localhost to prevent access from
+            127.0.0.1 (localhost) or 0.0.0.0 (available from all interfaces).
+            By default, this is set to 127.0.0.1 to prevent access from
             external machines.
         job_id: The ID of this job.
         configure_logging: True if allow the logging cofiguration here.