[autoscaler/docker] Docker Inititialization Revamp (#9515)

* Basic idea

* Small fixes

* dockerize start commands in Command Runner

* Remove run_init from CommandRunnerInterface

* Add Parens

Co-authored-by: Simon Mo <simon.mo@hey.com>

* Cleaning up

* Response to richards comments

* Further small fixes

* Fix Json

* schema format fix

* cleanup

* run more often

* fix indent

* Fix richards responses

* fix ups

* remove docker_commands from schema

* default to list

* fix docker cmd runner test

* lint fix

Co-authored-by: Simon Mo <simon.mo@hey.com>

python/ray/autoscaler/util.py

@@ -9,7 +9,7 @@ from typing import Any, Dict
 import ray
 import ray.services as services
 from ray.autoscaler.node_provider import get_default_config
-from ray.autoscaler.docker import dockerize_if_needed
+from ray.autoscaler.docker import validate_docker_config
 
 REQUIRED, OPTIONAL = True, False
 RAY_SCHEMA_PATH = os.path.join(
@@ -56,7 +56,7 @@ def validate_config(config: Dict[str, Any]) -> None:
     try:
         jsonschema.validate(config, schema)
     except jsonschema.ValidationError as e:
-        raise jsonschema.ValidationError(message=e.message) from None
+        raise e from None
 
     # Detect out of date defaults. This happens when the autoscaler that filled
     # out the default values is older than the version of the autoscaler that
@@ -90,7 +90,7 @@ def validate_config(config: Dict[str, Any]) -> None:
 def prepare_config(config):
     with_defaults = fillout_defaults(config)
     merge_setup_commands(with_defaults)
-    dockerize_if_needed(with_defaults)
+    validate_docker_config(with_defaults)
     return with_defaults