feat: add /jobs API

This API will be later tied to jobs as defined for specific flows
(post-training, eval, etc.) through the common scheduler mechanism.

Note: At the moment, API does nothing useful. (Except returning Not
Implemented errors when called.)

This is an alternative to developing per-flow jobs APIs. Eventually,
once /jobs API is implemented, we should be able to deprecate existing
APIs under /v1/post-training/, /v1/eval/ etc.

See #1587 (tracker)
See #1238 (design details)

Note: This is an alternative path to #1582 and #1583.

Signed-off-by: Ihar Hrachyshka <ihar.hrachyshka@gmail.com>

llama_stack/distribution/distribution.py

@@ -56,7 +56,7 @@ def builtin_automatically_routed_apis() -> List[AutoRoutedApiInfo]:
 
 def providable_apis() -> List[Api]:
     routing_table_apis = {x.routing_table_api for x in builtin_automatically_routed_apis()}
-    return [api for api in Api if api not in routing_table_apis and api != Api.inspect]
+    return [api for api in Api if api not in routing_table_apis and api not in (Api.inspect, Api.jobs)]
 
 
 def get_provider_registry() -> Dict[Api, Dict[str, ProviderSpec]]:

llama_stack/distribution/jobs.py

@@ -0,0 +1,48 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the terms described in the LICENSE file in
+# the root directory of this source tree.
+
+from pydantic import BaseModel
+
+from llama_stack.apis.jobs import (
+    JobInfo,
+    Jobs,
+    ListJobsResponse,
+)
+from llama_stack.distribution.datatypes import StackRunConfig
+
+
+class DistributionJobsConfig(BaseModel):
+    run_config: StackRunConfig
+
+
+async def get_provider_impl(config, deps):
+    impl = DistributionJobsImpl(config, deps)
+    await impl.initialize()
+    return impl
+
+
+class DistributionJobsImpl(Jobs):
+    def __init__(self, config, deps):
+        self.config = config
+        self.deps = deps
+
+    async def initialize(self) -> None:
+        pass
+
+    async def shutdown(self) -> None:
+        pass
+
+    async def list_jobs(self) -> ListJobsResponse:
+        raise NotImplementedError
+
+    async def delete_job(self, job_id: str) -> None:
+        raise NotImplementedError
+
+    async def cancel_job(self, job_id: str) -> None:
+        raise NotImplementedError
+
+    async def get_job(self, job_id: str) -> JobInfo:
+        raise NotImplementedError

llama_stack/distribution/resolver.py

@@ -14,6 +14,7 @@ from llama_stack.apis.datasets import Datasets
 from llama_stack.apis.eval import Eval
 from llama_stack.apis.inference import Inference
 from llama_stack.apis.inspect import Inspect
+from llama_stack.apis.jobs import Jobs
 from llama_stack.apis.models import Models
 from llama_stack.apis.post_training import PostTraining
 from llama_stack.apis.safety import Safety
@@ -62,6 +63,7 @@ def api_protocol_map() -> Dict[Api, Any]:
         Api.agents: Agents,
         Api.inference: Inference,
         Api.inspect: Inspect,
+        Api.jobs: Jobs,
         Api.vector_io: VectorIO,
         Api.vector_dbs: VectorDBs,
         Api.models: Models,
@@ -226,26 +228,32 @@ def sort_providers_by_deps(
         {k: list(v.values()) for k, v in providers_with_specs.items()}
     )
 
-    # Append built-in "inspect" provider
+    # Append built-in providers
     apis = [x[1].spec.api for x in sorted_providers]
-    sorted_providers.append(
+    deps = [x.value for x in apis]
+    config = run_config.model_dump()
+    sorted_providers += [
         (
-            "inspect",
+            name,
             ProviderWithSpec(
                 provider_id="__builtin__",
                 provider_type="__builtin__",
-                config={"run_config": run_config.model_dump()},
+                config={"run_config": config},
                 spec=InlineProviderSpec(
-                    api=Api.inspect,
+                    api=api,
                     provider_type="__builtin__",
-                    config_class="llama_stack.distribution.inspect.DistributionInspectConfig",
-                    module="llama_stack.distribution.inspect",
+                    config_class=f"llama_stack.distribution.{name}.Distribution{name.title()}Config",
+                    module=f"llama_stack.distribution.{name}",
                     api_dependencies=apis,
-                    deps__=[x.value for x in apis],
+                    deps__=deps,
                 ),
             ),
         )
-    )
+        for name, api in [
+            ("inspect", Api.inspect),
+            ("jobs", Api.jobs),
+        ]
+    ]
 
     logger.debug(f"Resolved {len(sorted_providers)} providers")
     for api_str, provider in sorted_providers:

llama_stack/distribution/server/server.py

@@ -367,7 +367,9 @@ def main():
             continue
         apis_to_serve.add(inf.routing_table_api.value)
 
-    apis_to_serve.add("inspect")
+    # also include builtin APIs
+    apis_to_serve += {"inspect", "jobs"}
+
     for api_str in apis_to_serve:
         api = Api(api_str)
 

llama_stack/distribution/stack.py

@@ -21,6 +21,7 @@ from llama_stack.apis.eval import Eval
 from llama_stack.apis.files import Files
 from llama_stack.apis.inference import Inference
 from llama_stack.apis.inspect import Inspect
+from llama_stack.apis.jobs import Jobs
 from llama_stack.apis.models import Models
 from llama_stack.apis.post_training import PostTraining
 from llama_stack.apis.safety import Safety
@@ -62,6 +63,7 @@ class LlamaStack(
     Models,
     Shields,
     Inspect,
+    Jobs,
     ToolGroups,
     ToolRuntime,
     RAGToolRuntime,