[runtime_env] Make pip installs incremental (#20341)

Uses a direct `pip install` instead of creating a conda env to make pip installs incremental to the cluster environment.

Separates the handling of `pip` and `conda` dependencies.

The new `pip` approach still works if only the base Ray is installed on the cluster and the user specifies libraries like "ray[serve]" in the `pip` field.  The mechanism is as follows:
- We don't actually want to reinstall ray via pip, since this could lead to version mismatch issues.  Instead, we want to use the Ray that's already installed in the cluster.
- So if "ray" was included by the user in the pip list, remove it
- If a library "ray[serve]" or "ray[tune, rllib]" was included in the pip list, remove it and replace it by its dependencies (e.g. "uvicorn", "requests", ..)

Co-authored-by: architkulkarni <arkulkar@gmail.com>
Co-authored-by: architkulkarni <architkulkarni@users.noreply.github.com>

ci/travis/ci.sh

@@ -183,7 +183,6 @@ test_python() {
       -python/ray/tests:test_runtime_env_plugin # runtime_env not supported on Windows
       -python/ray/tests:test_runtime_env_env_vars # runtime_env not supported on Windows
       -python/ray/tests:test_runtime_env_complicated # conda install slow leading to timeout
-      -python/ray/tests:test_runtime_env_conda # conda not supported on Windows
       -python/ray/tests:test_stress  # timeout
       -python/ray/tests:test_stress_sharded  # timeout
       -python/ray/tests:test_k8s_operator_unit_tests

dashboard/modules/runtime_env/runtime_env_agent.py

@@ -17,6 +17,7 @@ import ray.dashboard.modules.runtime_env.runtime_env_consts \
 from ray.experimental.internal_kv import _internal_kv_initialized, \
     _initialize_internal_kv
 from ray._private.ray_logging import setup_component_logger
+from ray._private.runtime_env.pip import PipManager
 from ray._private.runtime_env.conda import CondaManager
 from ray._private.runtime_env.context import RuntimeEnvContext
 from ray._private.runtime_env.py_modules import PyModulesManager
@@ -68,6 +69,7 @@ class RuntimeEnvAgent(dashboard_utils.DashboardAgentModule,
         _initialize_internal_kv(self._dashboard_agent.gcs_client)
         assert _internal_kv_initialized()
 
+        self._pip_manager = PipManager(self._runtime_env_dir)
         self._conda_manager = CondaManager(self._runtime_env_dir)
         self._py_modules_manager = PyModulesManager(self._runtime_env_dir)
         self._working_dir_manager = WorkingDirManager(self._runtime_env_dir)
@@ -100,6 +102,8 @@ class RuntimeEnvAgent(dashboard_utils.DashboardAgentModule,
                 per_job_logger.debug(f"Worker has resource :"
                                      f"{allocated_resource}")
                 context = RuntimeEnvContext(env_vars=runtime_env.env_vars())
+                self._pip_manager.setup(
+                    runtime_env, context, logger=per_job_logger)
                 self._conda_manager.setup(
                     runtime_env, context, logger=per_job_logger)
                 self._py_modules_manager.setup(
@@ -120,6 +124,9 @@ class RuntimeEnvAgent(dashboard_utils.DashboardAgentModule,
                 if runtime_env.conda_uri():
                     uri = runtime_env.conda_uri()
                     self._uris_to_envs[uri].add(serialized_runtime_env)
+                if runtime_env.pip_uri():
+                    uri = runtime_env.pip_uri()
+                    self._uris_to_envs[uri].add(serialized_runtime_env)
                 if runtime_env.plugin_uris():
                     for uri in runtime_env.plugin_uris():
                         self._uris_to_envs[uri].add(serialized_runtime_env)
@@ -226,6 +233,9 @@ class RuntimeEnvAgent(dashboard_utils.DashboardAgentModule,
             elif plugin == "conda":
                 if not self._conda_manager.delete_uri(uri):
                     failed_uris.append(uri)
+            elif plugin == "pip":
+                if not self._pip_manager.delete_uri(uri):
+                    failed_uris.append(uri)
             else:
                 raise ValueError(
                     "RuntimeEnvAgent received DeleteURI request "

python/ray/_private/runtime_env/conda.py

@@ -25,21 +25,33 @@ from ray._private.runtime_env.packaging import Protocol, parse_uri
 default_logger = logging.getLogger(__name__)
 
 
-def _resolve_current_ray_path():
+def _resolve_current_ray_path() -> str:
     # When ray is built from source with pip install -e,
-    # ray.__file__ returns .../python/ray/__init__.py.
+    # ray.__file__ returns .../python/ray/__init__.py and this function returns
-    # When ray is installed from a prebuilt binary, it returns
+    # ".../python".
-    # .../site-packages/ray/__init__.py
+    # When ray is installed from a prebuilt binary, ray.__file__ returns
+    # .../site-packages/ray/__init__.py and this function returns
+    # ".../site-packages".
     return os.path.split(os.path.split(ray.__file__)[0])[0]
 
 
-def _resolve_install_from_source_ray_dependencies():
+def _get_ray_setup_spec():
-    """Find the ray dependencies when Ray is install from source"""
+    """Find the Ray setup_spec from the currently running Ray.
+
+    This function works even when Ray is built from source with pip install -e.
+    """
     ray_source_python_path = _resolve_current_ray_path()
     setup_py_path = os.path.join(ray_source_python_path, "setup.py")
-    ray_install_requires = runpy.run_path(setup_py_path)[
+    return runpy.run_path(setup_py_path)["setup_spec"]
-        "setup_spec"].install_requires
+
-    return ray_install_requires
+
+def _resolve_install_from_source_ray_dependencies():
+    """Find the Ray dependencies when Ray is installed from source."""
+    return _get_ray_setup_spec().install_requires
+
+
+def _resolve_install_from_source_ray_extras() -> Dict[str, List[str]]:
+    return _get_ray_setup_spec().extras
 
 
 def _inject_ray_to_conda_site(
@@ -69,43 +81,6 @@ def _current_py_version():
     return ".".join(map(str, sys.version_info[:3]))  # like 3.6.10
 
 
-def get_conda_dict(runtime_env, resources_dir) -> Optional[Dict[Any, Any]]:
-    """ Construct a conda dependencies dict from a runtime env.
-
-        This function does not inject Ray or Python into the conda dict.
-        If the runtime env does not specify pip or conda, or if it specifies
-        the name of a preinstalled conda environment, this function returns
-        None.  If pip is specified, a conda dict is created containing the
-        pip dependencies.  If conda is already given as a dict, this function
-        is the identity function.
-    """
-    if runtime_env.has_conda():
-        if runtime_env.conda_config():
-            return json.loads(runtime_env.conda_config())
-        else:
-            return None
-    if runtime_env.has_pip():
-        requirements_txt = "\n".join(runtime_env.pip_packages()) + "\n"
-        pip_hash = hashlib.sha1(requirements_txt.encode("utf-8")).hexdigest()
-        pip_hash_str = f"pip-generated-{pip_hash}"
-
-        requirements_txt_path = os.path.join(
-            resources_dir, f"requirements-{pip_hash_str}.txt")
-        conda_dict = {
-            "name": pip_hash_str,
-            "dependencies": ["pip", {
-                "pip": [f"-r {requirements_txt_path}"]
-            }]
-        }
-        file_lock_name = f"ray-{pip_hash_str}.lock"
-        with FileLock(os.path.join(resources_dir, file_lock_name)):
-            try_to_create_directory(resources_dir)
-            with open(requirements_txt_path, "w") as file:
-                file.write(requirements_txt)
-        return conda_dict
-    return None
-
-
 def current_ray_pip_specifier(
         logger: Optional[logging.Logger] = default_logger) -> Optional[str]:
     """The pip requirement specifier for the running version of Ray.
@@ -199,16 +174,9 @@ def _get_conda_env_hash(conda_dict: Dict) -> str:
     return hash
 
 
-def _get_pip_hash(pip_list: List[str]) -> str:
-    serialized_pip_spec = json.dumps(pip_list)
-    hash = hashlib.sha1(serialized_pip_spec.encode("utf-8")).hexdigest()
-    return hash
-
-
 def get_uri(runtime_env: Dict) -> Optional[str]:
     """Return `"conda://<hashed_dependencies>"`, or None if no GC required."""
     conda = runtime_env.get("conda")
-    pip = runtime_env.get("pip")
     if conda is not None:
         if isinstance(conda, str):
             # User-preinstalled conda env.  We don't garbage collect these, so
@@ -219,12 +187,6 @@ def get_uri(runtime_env: Dict) -> Optional[str]:
         else:
             raise TypeError("conda field received by RuntimeEnvAgent must be "
                             f"str or dict, not {type(conda).__name__}.")
-    elif pip is not None:
-        if isinstance(pip, list):
-            uri = "conda://" + _get_pip_hash(pip_list=pip)
-        else:
-            raise TypeError("pip field received by RuntimeEnvAgent must be "
-                            f"list, not {type(pip).__name__}.")
     else:
         uri = None
     return uri
@@ -233,8 +195,7 @@ def get_uri(runtime_env: Dict) -> Optional[str]:
 class CondaManager:
     def __init__(self, resources_dir: str):
         self._resources_dir = os.path.join(resources_dir, "conda")
-        if not os.path.isdir(self._resources_dir):
+        try_to_create_directory(self._resources_dir)
-            os.makedirs(self._resources_dir)
         self._created_envs: Set[str] = set()
 
     def _get_path_from_hash(self, hash: str) -> str:
@@ -252,7 +213,7 @@ class CondaManager:
     def delete_uri(self,
                    uri: str,
                    logger: Optional[logging.Logger] = default_logger) -> bool:
-        logger.debug(f"Got request to delete URI {uri}")
+        logger.info(f"Got request to delete URI {uri}")
         protocol, hash = parse_uri(uri)
         if protocol != Protocol.CONDA:
             raise ValueError(
@@ -263,14 +224,14 @@ class CondaManager:
         self._created_envs.remove(conda_env_path)
         successful = delete_conda_env(prefix=conda_env_path, logger=logger)
         if not successful:
-            logger.debug(f"Error when deleting conda env {conda_env_path}. ")
+            logger.warning(f"Error when deleting conda env {conda_env_path}. ")
         return successful
 
     def setup(self,
               runtime_env: RuntimeEnv,
               context: RuntimeEnvContext,
               logger: Optional[logging.Logger] = default_logger):
-        if not runtime_env.has_conda() and not runtime_env.has_pip():
+        if not runtime_env.has_conda():
             return
 
         logger.debug("Setting up conda or pip for runtime_env: "
@@ -279,7 +240,7 @@ class CondaManager:
         if runtime_env.conda_env_name():
             conda_env_name = runtime_env.conda_env_name()
         else:
-            conda_dict = get_conda_dict(runtime_env, self._resources_dir)
+            conda_dict = json.loads(runtime_env.conda_config())
             protocol, hash = parse_uri(runtime_env.conda_uri())
             conda_env_name = self._get_path_from_hash(hash)
             assert conda_dict is not None

python/ray/_private/runtime_env/packaging.py

@@ -40,6 +40,7 @@ class Protocol(Enum):
 
     GCS = "gcs", "For packages dynamically uploaded and managed by the GCS."
     CONDA = "conda", "For conda environments installed locally on each node."
+    PIP = "pip", "For pip environments installed locally on each node."
     HTTPS = "https", ("Remote https path, "
                       "assumes everything packed in one zip file.")
     S3 = "s3", "Remote s3 path, assumes everything packed in one zip file."

python/ray/_private/runtime_env/pip.py

@@ -0,0 +1,118 @@
+import os
+import json
+import logging
+import hashlib
+import shutil
+
+from pathlib import Path
+from typing import Optional, List, Dict
+
+from ray._private.runtime_env.conda_utils import exec_cmd_stream_to_logger
+from ray._private.runtime_env.context import RuntimeEnvContext
+from ray._private.runtime_env.packaging import Protocol, parse_uri
+from ray._private.runtime_env.utils import RuntimeEnv
+from ray._private.utils import try_to_create_directory
+
+default_logger = logging.getLogger(__name__)
+
+RAY_RUNTIME_ENV_ALLOW_RAY_IN_PIP = "RAY_RUNTIME_ENV_ALLOW_RAY_IN_PIP"
+
+
+def _get_pip_hash(pip_list: List[str]) -> str:
+    serialized_pip_spec = json.dumps(pip_list, sort_keys=True)
+    hash = hashlib.sha1(serialized_pip_spec.encode("utf-8")).hexdigest()
+    return hash
+
+
+def _install_pip_list_to_dir(
+        pip_list: List[str],
+        target_dir: str,
+        logger: Optional[logging.Logger] = default_logger):
+    try_to_create_directory(target_dir)
+    exit_code, output = exec_cmd_stream_to_logger(
+        ["pip", "install", f"--target={target_dir}"] + pip_list, logger)
+    if exit_code != 0:
+        shutil.rmtree(target_dir)
+        raise RuntimeError(f"Failed to install pip requirements:\n{output}")
+
+
+def get_uri(runtime_env: Dict) -> Optional[str]:
+    """Return `"pip://<hashed_dependencies>"`, or None if no GC required."""
+    pip = runtime_env.get("pip")
+    if pip is not None:
+        if isinstance(pip, list):
+            uri = "pip://" + _get_pip_hash(pip_list=pip)
+        else:
+            raise TypeError("pip field received by RuntimeEnvAgent must be "
+                            f"list, not {type(pip).__name__}.")
+    else:
+        uri = None
+    return uri
+
+
+class PipManager:
+    def __init__(self, resources_dir: str):
+        self._resources_dir = os.path.join(resources_dir, "pip")
+        try_to_create_directory(self._resources_dir)
+
+    def _get_path_from_hash(self, hash: str) -> str:
+        """Generate a path from the hash of a pip spec.
+
+        Example output:
+            /tmp/ray/session_2021-11-03_16-33-59_356303_41018/runtime_resources
+                /pip/ray-9a7972c3a75f55e976e620484f58410c920db091
+        """
+        return os.path.join(self._resources_dir, hash)
+
+    def delete_uri(self,
+                   uri: str,
+                   logger: Optional[logging.Logger] = default_logger) -> bool:
+        logger.info(f"Got request to delete URI {uri}")
+        protocol, hash = parse_uri(uri)
+        if protocol != Protocol.PIP:
+            raise ValueError("PipManager can only delete URIs with protocol "
+                             f"pip. Received protocol {protocol}, URI {uri}")
+
+        pip_env_path = self._get_path_from_hash(hash)
+        try:
+            shutil.rmtree(pip_env_path)
+            successful = True
+        except OSError:
+            successful = False
+            logger.warning(f"Error when deleting pip env {pip_env_path}.")
+        return successful
+
+    def setup(self,
+              runtime_env: RuntimeEnv,
+              context: RuntimeEnvContext,
+              logger: Optional[logging.Logger] = default_logger):
+        if not runtime_env.has_pip():
+            return
+
+        logger.debug(f"Setting up pip for runtime_env: {runtime_env}")
+        pip_packages: List[str] = runtime_env.pip_packages()
+        target_dir = self._get_path_from_hash(_get_pip_hash(pip_packages))
+
+        _install_pip_list_to_dir(pip_packages, target_dir, logger=logger)
+
+        # Despite Ray being removed from the input pip list during validation,
+        # other packages in the pip list (for example, xgboost_ray) may
+        # themselves include Ray as a dependency.  In this case, we will have
+        # inadvertently installed the latest Ray version in the target_dir,
+        # which may cause Ray version mismatch issues. Uninstall it here, if it
+        # exists, to make the workers use the Ray that is already
+        # installed in the cluster.
+        #
+        # In the case where the user explicitly wants to include Ray in their
+        # pip list (and signals this by setting the environment variable below)
+        # then we don't want this deletion logic, so we skip it.
+        if os.environ.get(RAY_RUNTIME_ENV_ALLOW_RAY_IN_PIP) != 1:
+            ray_path = Path(target_dir) / "ray"
+            if ray_path.exists() and ray_path.is_dir():
+                shutil.rmtree(ray_path)
+
+        # Insert the target directory into the PYTHONPATH.
+        python_path = target_dir
+        if "PYTHONPATH" in context.env_vars:
+            python_path += os.pathsep + context.env_vars["PYTHONPATH"]
+        context.env_vars["PYTHONPATH"] = python_path

python/ray/_private/runtime_env/py_modules.py

@@ -10,6 +10,7 @@ from ray._private.runtime_env.packaging import (
     download_and_unpack_package, delete_package, get_uri_for_directory,
     parse_uri, Protocol, upload_package_if_needed)
 from ray._private.runtime_env.utils import RuntimeEnv
+from ray._private.utils import try_to_create_directory
 
 default_logger = logging.getLogger(__name__)
 
@@ -89,8 +90,7 @@ def upload_py_modules_if_needed(
 class PyModulesManager:
     def __init__(self, resources_dir: str):
         self._resources_dir = os.path.join(resources_dir, "py_modules_files")
-        if not os.path.isdir(self._resources_dir):
+        try_to_create_directory(self._resources_dir)
-            os.makedirs(self._resources_dir)
         assert _internal_kv_initialized()
 
     def delete_uri(self,

python/ray/_private/runtime_env/utils.py

@@ -135,6 +135,7 @@ class RuntimeEnv:
         if uris.working_dir_uri \
            or uris.py_modules_uris \
            or uris.conda_uri \
+           or uris.pip_uri \
            or uris.plugin_uris:
             return True
         return False
@@ -148,6 +149,9 @@ class RuntimeEnv:
     def conda_uri(self) -> str:
         return self._proto_runtime_env.uris.conda_uri
 
+    def pip_uri(self) -> str:
+        return self._proto_runtime_env.uris.pip_uri
+
     def plugin_uris(self) -> List[str]:
         return list(self._proto_runtime_env.uris.plugin_uris)
 
@@ -216,8 +220,8 @@ class RuntimeEnv:
             self._proto_runtime_env.py_container_runtime_env.run_options)
 
     @classmethod
-    def from_dict(cls, runtime_env_dict: Dict[str, Any],
+    def from_dict(cls, runtime_env_dict: Dict[str, Any], conda_get_uri_fn,
-                  conda_get_uri_fn) -> "RuntimeEnv":
+                  pip_get_uri_fn) -> "RuntimeEnv":
         proto_runtime_env = ProtoRuntimeEnv()
         proto_runtime_env.py_modules.extend(
             runtime_env_dict.get("py_modules", []))
@@ -228,10 +232,14 @@ class RuntimeEnv:
         if "py_modules" in runtime_env_dict:
             for uri in runtime_env_dict["py_modules"]:
                 proto_runtime_env.uris.py_modules_uris.append(uri)
-        if "conda" or "pip" in runtime_env_dict:
+        if "conda" in runtime_env_dict:
             uri = conda_get_uri_fn(runtime_env_dict)
             if uri is not None:
                 proto_runtime_env.uris.conda_uri = uri
+        if "pip" in runtime_env_dict:
+            uri = pip_get_uri_fn(runtime_env_dict)
+            if uri is not None:
+                proto_runtime_env.uris.pip_uri = uri
         env_vars = runtime_env_dict.get("env_vars", {})
         proto_runtime_env.env_vars.update(env_vars.items())
         if "_ray_release" in runtime_env_dict:

python/ray/_private/runtime_env/validation.py

@@ -3,6 +3,8 @@ import os
 from pathlib import Path
 import sys
 from typing import Any, Dict, List, Optional, Set, Union
+from pkg_resources import Requirement
+from collections import OrderedDict
 import yaml
 
 import ray
@@ -10,7 +12,11 @@ from ray._private.runtime_env.plugin import (RuntimeEnvPlugin,
                                              encode_plugin_uri)
 from ray._private.runtime_env.utils import RuntimeEnv
 from ray._private.utils import import_attr
-from ray._private.runtime_env import conda
+from ray._private.runtime_env.conda import (
+    _resolve_install_from_source_ray_extras, get_uri as get_conda_uri)
+from ray._private.runtime_env.pip import RAY_RUNTIME_ENV_ALLOW_RAY_IN_PIP
+
+from ray._private.runtime_env.pip import get_uri as get_pip_uri
 
 logger = logging.getLogger(__name__)
 
@@ -103,17 +109,57 @@ def parse_and_validate_conda(conda: Union[str, dict]) -> Union[str, dict]:
     return result
 
 
+def _rewrite_pip_list_ray_libraries(pip_list: List[str]) -> List[str]:
+    result = []
+    for specifier in pip_list:
+        requirement = Requirement.parse(specifier)
+        package_name = requirement.name
+        if package_name == "ray":
+            libraries = requirement.extras  # e.g. ("serve", "tune")
+            if libraries == ():
+                # Ray alone was specified (e.g. "ray" or "ray>1.4"). Remove it.
+                if os.environ.get(RAY_RUNTIME_ENV_ALLOW_RAY_IN_PIP) != "1":
+                    logger.warning(
+                        "Ray was specified in the `pip` field of the "
+                        f"`runtime_env`: '{specifier}'. This is not needed; "
+                        "Ray is already installed on the cluster, so that Ray"
+                        "installation will be used. To prevent Ray version "
+                        f"incompatibility issues, '{specifier}' has been "
+                        "deleted from the `pip` field. To disable this "
+                        "deletion, set the environment variable "
+                        f"{RAY_RUNTIME_ENV_ALLOW_RAY_IN_PIP} to 1.")
+                else:
+                    result.append(specifier)
+            else:
+                # Replace the library with its dependencies.
+                extras = _resolve_install_from_source_ray_extras()
+                for library in libraries:
+                    result += extras[library]
+        else:
+            # Pass through all non-Ray packages unmodified.
+            result.append(specifier)
+    return result
+
+
 def parse_and_validate_pip(pip: Union[str, List[str]]) -> Optional[List[str]]:
     """Parses and validates a user-provided 'pip' option.
 
-    Conda can be one of two cases:
+    The value of the input 'pip' field can be one of two cases:
         1) A List[str] describing the requirements. This is passed through.
         2) A string pointing to a local requirements file. In this case, the
            file contents will be read split into a list.
+
+    The returned parsed value will be a list of pip packages. If a Ray library
+    (e.g. "ray[serve]") is specified, it will be deleted and replaced by its
+    dependencies (e.g. "uvicorn", "requests").
+
+    If the base Ray package (e.g. "ray>1.4" or "ray") is specified in the
+    input, it will be removed, unless the environment variable
+    RAY_RUNTIME_ENV_ALLOW_RAY_IN_PIP is set to 1.
     """
     assert pip is not None
 
-    result = None
+    pip_list = None
     if sys.platform == "win32":
         raise NotImplementedError("The 'pip' field in runtime_env "
                                   "is not currently supported on "
@@ -123,16 +169,26 @@ def parse_and_validate_pip(pip: Union[str, List[str]]) -> Optional[List[str]]:
         pip_file = Path(pip)
         if not pip_file.is_file():
             raise ValueError(f"{pip_file} is not a valid file")
-        result = pip_file.read_text().strip().split("\n")
+        pip_list = pip_file.read_text().strip().split("\n")
     elif isinstance(pip, list) and all(isinstance(dep, str) for dep in pip):
-        if len(pip) == 0:
+        pip_list = pip
-            result = None
-        else:
-            result = pip
     else:
         raise TypeError("runtime_env['pip'] must be of type str or "
                         f"List[str], got {type(pip)}")
 
+    result = _rewrite_pip_list_ray_libraries(pip_list)
+
+    # Eliminate duplicates to prevent `pip install` from erroring. Use
+    # OrderedDict to preserve the order of the list.  This makes the output
+    # deterministic and easier to debug, because pip install can have
+    # different behavior depending on the order of the input.
+    result = list(OrderedDict.fromkeys(result))
+
+    if len(result) == 0:
+        result = None
+
+    logger.debug(f"Rewrote runtime_env `pip` field from {pip} to {result}.")
+
     return result
 
 
@@ -345,17 +401,22 @@ class ParsedRuntimeEnv(dict):
         if "py_modules" in self:
             for uri in self["py_modules"]:
                 plugin_uris.append(encode_plugin_uri("py_modules", uri))
-        if "conda" or "pip" in self:
+        if "conda" in self:
-            uri = conda.get_uri(self)
+            uri = get_conda_uri(self)
             if uri is not None:
                 plugin_uris.append(encode_plugin_uri("conda", uri))
+        if "pip" in self:
+            uri = get_pip_uri(self)
+            if uri is not None:
+                plugin_uris.append(encode_plugin_uri("pip", uri))
 
         return plugin_uris
 
     def get_proto_runtime_env(self):
         """Return the protobuf structure of runtime env."""
         if self._cached_pb is None:
-            self._cached_pb = RuntimeEnv.from_dict(self, conda.get_uri)
+            self._cached_pb = RuntimeEnv.from_dict(self, get_conda_uri,
+                                                   get_pip_uri)
 
         return self._cached_pb
 

python/ray/_private/runtime_env/working_dir.py

@@ -9,6 +9,7 @@ from ray._private.runtime_env.context import RuntimeEnvContext
 from ray._private.runtime_env.packaging import (
     download_and_unpack_package, delete_package, get_uri_for_directory,
     parse_uri, Protocol, upload_package_if_needed)
+from ray._private.utils import try_to_create_directory
 
 default_logger = logging.getLogger(__name__)
 
@@ -61,8 +62,7 @@ def upload_working_dir_if_needed(
 class WorkingDirManager:
     def __init__(self, resources_dir: str):
         self._resources_dir = os.path.join(resources_dir, "working_dir_files")
-        if not os.path.isdir(self._resources_dir):
+        try_to_create_directory(self._resources_dir)
-            os.makedirs(self._resources_dir)
         assert _internal_kv_initialized()
 
     def delete_uri(self,

python/ray/_private/test_utils.py

@@ -1076,3 +1076,26 @@ def chdir(d: str):
     os.chdir(d)
     yield
     os.chdir(old_dir)
+
+
+def generate_runtime_env_dict(field, spec_format, tmp_path, pip_list=None):
+    if pip_list is None:
+        pip_list = ["pip-install-test==0.5"]
+    if field == "conda":
+        conda_dict = {"dependencies": ["pip", {"pip": pip_list}]}
+        if spec_format == "file":
+            conda_file = tmp_path / f"environment-{hash(str(pip_list))}.yml"
+            conda_file.write_text(yaml.dump(conda_dict))
+            conda = str(conda_file)
+        elif spec_format == "python_object":
+            conda = conda_dict
+        runtime_env = {"conda": conda}
+    elif field == "pip":
+        if spec_format == "file":
+            pip_file = tmp_path / f"requirements-{hash(str(pip_list))}.txt"
+            pip_file.write_text("\n".join(pip_list))
+            pip = str(pip_file)
+        elif spec_format == "python_object":
+            pip = pip_list
+        runtime_env = {"pip": pip}
+    return runtime_env

python/ray/tests/BUILD

@@ -209,8 +209,9 @@ py_test_module_list(
 
 py_test_module_list(
   files = [
-    "test_runtime_env_conda.py",
+    "test_runtime_env_conda_and_pip.py",
-    "test_runtime_env_complicated.py",
+    "test_runtime_env_conda_and_pip_2.py",
+    "test_runtime_env_complicated.py"
   ],
   size = "large",
   extra_srcs = SRCS,

python/ray/tests/test_runtime_env_complicated.py

@@ -431,10 +431,17 @@ def test_pip_task(shutdown_only, pip_as_str, tmp_path):
 @pytest.mark.skipif(
     os.environ.get("CI") and sys.platform != "linux",
     reason="This test is only run on linux CI machines.")
-def test_pip_ray_serve(shutdown_only):
+@pytest.mark.parametrize("option", ["conda", "pip"])
-    """Tests that ray[serve] can be included as a pip dependency."""
+def test_conda_pip_extras_ray_serve(shutdown_only, option):
+    """Tests that ray[extras] can be included as a conda/pip dependency."""
     ray.init()
-    runtime_env = {"pip": ["pip-install-test==0.5", "ray[serve]"]}
+    pip = ["pip-install-test==0.5", "ray[serve]"]
+    if option == "conda":
+        runtime_env = {"conda": {"dependencies": ["pip", {"pip": pip}]}}
+    elif option == "pip":
+        runtime_env = {"pip": pip}
+    else:
+        assert False, f"Unknown option: {option}"
 
     @ray.remote
     def f():
@@ -775,7 +782,7 @@ def test_e2e_complex(call_ray_start, tmp_path):
         "ray[serve, tune]",
         "texthero",
         "PyGithub",
-        "xgboost_ray",
+        "xgboost_ray",  # has Ray as a dependency
         "pandas==1.1",  # pandas 1.2.4 in the demo, but not supported on py36
         "typer",
         "aiofiles",

python/ray/tests/test_runtime_env_conda_and_pip.py

@@ -1,7 +1,9 @@
 import os
 import pytest
 import sys
-from ray._private.test_utils import wait_for_condition, chdir
+from ray._private.test_utils import (wait_for_condition, chdir,
+                                     generate_runtime_env_dict)
+
 import yaml
 import tempfile
 from pathlib import Path
@@ -16,7 +18,7 @@ if not os.environ.get("CI"):
 
 def check_local_files_gced(cluster):
     for node in cluster.list_all_nodes():
-        for subdir in ["conda"]:
+        for subdir in ["conda", "pip"]:
             all_files = os.listdir(
                 os.path.join(node.get_runtime_env_dir_path(), subdir))
             # Check that there are no files remaining except for .lock files
@@ -32,31 +34,6 @@ def check_local_files_gced(cluster):
     return True
 
 
-def generate_runtime_env_dict(field, spec_format, tmp_path):
-    if field == "conda":
-        conda_dict = {
-            "dependencies": ["pip", {
-                "pip": ["pip-install-test==0.5"]
-            }]
-        }
-        if spec_format == "file":
-            conda_file = tmp_path / "environment.yml"
-            conda_file.write_text(yaml.dump(conda_dict))
-            conda = str(conda_file)
-        elif spec_format == "python_object":
-            conda = conda_dict
-        runtime_env = {"conda": conda}
-    elif field == "pip":
-        if spec_format == "file":
-            pip_file = tmp_path / "requirements.txt"
-            pip_file.write_text("\n".join(["pip-install-test==0.5"]))
-            pip = str(pip_file)
-        elif spec_format == "python_object":
-            pip = ["pip-install-test==0.5"]
-        runtime_env = {"pip": pip}
-    return runtime_env
-
-
 @pytest.mark.skipif(
     os.environ.get("CI") and sys.platform != "linux",
     reason="Requires PR wheels built in CI, so only run on linux CI machines.")

python/ray/tests/test_runtime_env_conda_and_pip_2.py

@@ -0,0 +1,66 @@
+import os
+from typing import Dict
+import pytest
+import sys
+from ray.exceptions import RuntimeEnvSetupError
+from ray._private.test_utils import (wait_for_condition,
+                                     generate_runtime_env_dict)
+import ray
+
+if not os.environ.get("CI"):
+    # This flags turns on the local development that link against current ray
+    # packages and fall back all the dependencies to current python's site.
+    os.environ["RAY_RUNTIME_ENV_LOCAL_DEV_MODE"] = "1"
+
+
+@pytest.mark.parametrize("field", ["conda", "pip"])
+@pytest.mark.parametrize("specify_env_in_init", [False, True])
+@pytest.mark.parametrize("spec_format", ["file", "python_object"])
+def test_install_failure_logging(start_cluster, specify_env_in_init, field,
+                                 spec_format, tmp_path, capsys):
+    cluster, address = start_cluster
+    using_ray_client = address.startswith("ray://")
+
+    bad_envs: Dict[str, Dict] = {}
+    bad_packages: Dict[str, str] = {}
+    for scope in "init", "actor", "task":
+        bad_packages[scope] = "doesnotexist" + scope
+        bad_envs[scope] = generate_runtime_env_dict(
+            field, spec_format, tmp_path, pip_list=[bad_packages[scope]])
+
+    if specify_env_in_init:
+        if using_ray_client:
+            with pytest.raises(ConnectionAbortedError) as excinfo:
+                ray.init(address, runtime_env=bad_envs["init"])
+            assert bad_packages["init"] in str(excinfo.value)
+        else:
+            ray.init(address, runtime_env=bad_envs["init"])
+            wait_for_condition(
+                lambda: bad_packages["init"] in capsys.readouterr().out,
+                timeout=30)
+        return
+
+    ray.init(address)
+
+    @ray.remote(runtime_env=bad_envs["actor"])
+    class A:
+        pass
+
+    a = A.remote()  # noqa
+
+    wait_for_condition(
+        lambda: bad_packages["actor"] in capsys.readouterr().out, timeout=30)
+
+    @ray.remote(runtime_env=bad_envs["task"])
+    def f():
+        pass
+
+    with pytest.raises(RuntimeEnvSetupError):
+        ray.get(f.remote())
+
+    wait_for_condition(
+        lambda: bad_packages["task"] in capsys.readouterr().out, timeout=30)
+
+
+if __name__ == "__main__":
+    sys.exit(pytest.main(["-sv", __file__]))

python/ray/tests/test_runtime_env_validation.py

@@ -11,6 +11,7 @@ from ray._private.runtime_env.validation import (
     parse_and_validate_conda, parse_and_validate_pip,
     parse_and_validate_env_vars, parse_and_validate_py_modules,
     ParsedRuntimeEnv)
+from ray._private.runtime_env.pip import RAY_RUNTIME_ENV_ALLOW_RAY_IN_PIP
 from ray._private.runtime_env.plugin import (decode_plugin_uri,
                                              encode_plugin_uri)
 
@@ -205,6 +206,23 @@ class TestValidatePip:
         result = parse_and_validate_pip(PIP_LIST)
         assert result == PIP_LIST
 
+    def test_remove_ray(self):
+        result = parse_and_validate_pip(["pkg1", "ray", "pkg2"])
+        assert result == ["pkg1", "pkg2"]
+
+    def test_remove_ray_env_var(self, monkeypatch):
+        monkeypatch.setenv(RAY_RUNTIME_ENV_ALLOW_RAY_IN_PIP, "1")
+        result = parse_and_validate_pip(["pkg1", "ray", "pkg2"])
+        assert result == ["pkg1", "ray", "pkg2"]
+
+    def test_replace_ray_libraries_with_dependencies(self):
+        result = parse_and_validate_pip(["pkg1", "ray[serve, tune]", "pkg2"])
+        assert "pkg1" in result
+        assert "pkg2" in result
+        assert "uvicorn" in result  # from ray[serve]
+        assert "pandas" in result  # from ray[tune]
+        assert not any(["ray" in specifier for specifier in result])
+
 
 class TestValidateEnvVars:
     def test_type_validation(self):

src/ray/core_worker/core_worker.cc

@@ -1425,6 +1425,10 @@ static std::vector<std::string> GetUrisFromRuntimeEnv(
     const auto &uri = runtime_env->uris().conda_uri();
     result.emplace_back(encode_plugin_uri("conda", uri));
   }
+  if (!runtime_env->uris().pip_uri().empty()) {
+    const auto &uri = runtime_env->uris().pip_uri();
+    result.emplace_back(encode_plugin_uri("pip", uri));
+  }
   for (const auto &uri : runtime_env->uris().plugin_uris()) {
     result.emplace_back(encode_plugin_uri("plugin", uri));
   }

src/ray/protobuf/runtime_env_common.proto

@@ -83,8 +83,10 @@ message RuntimeEnvUris {
   repeated string py_modules_uris = 2;
   /// conda uri
   string conda_uri = 3;
+  /// pip uri
+  string pip_uri = 4;
   /// plugin uris
-  repeated string plugin_uris = 4;
+  repeated string plugin_uris = 5;
 }
 
 /// The runtime environment describes all the runtime packages needed to