Adding worker logs and plumbed task_parameters to distributed coach (#130)

rl_coach/coach.py

@@ -84,7 +84,7 @@ def start_graph(graph_manager: 'GraphManager', task_parameters: 'TaskParameters'
     graph_manager.close()
 
 
-def handle_distributed_coach_tasks(graph_manager, args):
+def handle_distributed_coach_tasks(graph_manager, args, task_parameters):
     ckpt_inside_container = "/checkpoint"
 
     memory_backend_params = None
@@ -100,22 +100,24 @@ def handle_distributed_coach_tasks(graph_manager, args):
         graph_manager.data_store_params = data_store_params
 
     if args.distributed_coach_run_type == RunType.TRAINER:
+        task_parameters.checkpoint_save_dir = ckpt_inside_container
         training_worker(
             graph_manager=graph_manager,
-            checkpoint_dir=ckpt_inside_container
+            task_parameters=task_parameters
         )
 
     if args.distributed_coach_run_type == RunType.ROLLOUT_WORKER:
+        task_parameters.checkpoint_restore_dir = ckpt_inside_container
+
         data_store = None
         if args.data_store_params:
             data_store = get_data_store(data_store_params)
-            wait_for_checkpoint(checkpoint_dir=ckpt_inside_container, data_store=data_store)
 
         rollout_worker(
             graph_manager=graph_manager,
-            checkpoint_dir=ckpt_inside_container,
             data_store=data_store,
-            num_workers=args.num_workers
+            num_workers=args.num_workers,
+            task_parameters=task_parameters
         )
 
 
@@ -124,8 +126,16 @@ def handle_distributed_coach_orchestrator(args):
         RunTypeParameters
 
     ckpt_inside_container = "/checkpoint"
-    rollout_command = ['python3', 'rl_coach/coach.py', '--distributed_coach_run_type', str(RunType.ROLLOUT_WORKER)] + sys.argv[1:]
-    trainer_command = ['python3', 'rl_coach/coach.py', '--distributed_coach_run_type', str(RunType.TRAINER)] + sys.argv[1:]
+    arg_list = sys.argv[1:]
+    try:
+        i = arg_list.index('--distributed_coach_run_type')
+        arg_list.pop(i)
+        arg_list.pop(i)
+    except ValueError:
+        pass
+
+    trainer_command = ['python3', 'rl_coach/coach.py', '--distributed_coach_run_type', str(RunType.TRAINER)] + arg_list
+    rollout_command = ['python3', 'rl_coach/coach.py', '--distributed_coach_run_type', str(RunType.ROLLOUT_WORKER)] + arg_list
 
     if '--experiment_name' not in rollout_command:
         rollout_command = rollout_command + ['--experiment_name', args.experiment_name]
@@ -170,6 +180,10 @@ def handle_distributed_coach_orchestrator(args):
         print("Could not deploy rollout worker(s).")
         return
 
+    if args.dump_worker_logs:
+        screen.log_title("Dumping rollout worker logs in: {}".format(args.experiment_path))
+        orchestrator.worker_logs(path=args.experiment_path)
+
     try:
         orchestrator.trainer_logs()
     except KeyboardInterrupt:
@@ -321,6 +335,9 @@ class CoachLauncher(object):
         if args.list:
             self.display_all_presets_and_exit()
 
+        if args.distributed_coach and not args.checkpoint_save_secs:
+            screen.error("Distributed coach requires --checkpoint_save_secs or -s")
+
         # Read args from config file for distributed Coach.
         if args.distributed_coach and args.distributed_coach_run_type == RunType.ORCHESTRATOR:
             coach_config = ConfigParser({
@@ -550,6 +567,9 @@ class CoachLauncher(object):
                                  "target success rate as set by the environment or a custom success rate as defined "
                                  "in the preset. ",
                             action='store_true')
+        parser.add_argument('--dump_worker_logs',
+                            help="(flag) Only used in distributed coach. If set, the worker logs are saved in the experiment dir",
+                            action='store_true')
 
         return parser
 
@@ -570,26 +590,6 @@ class CoachLauncher(object):
             atexit.register(logger.summarize_experiment)
             screen.change_terminal_title(args.experiment_name)
 
-        # open dashboard
-        if args.open_dashboard:
-            open_dashboard(args.experiment_path)
-
-        if args.distributed_coach and args.distributed_coach_run_type != RunType.ORCHESTRATOR:
-            handle_distributed_coach_tasks(graph_manager, args)
-            return
-
-        if args.distributed_coach and args.distributed_coach_run_type == RunType.ORCHESTRATOR:
-            handle_distributed_coach_orchestrator(args)
-            return
-
-        # Single-threaded runs
-        if args.num_workers == 1:
-            self.start_single_threaded(graph_manager, args)
-        else:
-            self.start_multi_threaded(graph_manager, args)
-
-    def start_single_threaded(self, graph_manager: 'GraphManager', args: argparse.Namespace):
-        # Start the training or evaluation
         task_parameters = TaskParameters(
             framework_type=args.framework,
             evaluate_only=args.evaluate,
@@ -603,6 +603,26 @@ class CoachLauncher(object):
             apply_stop_condition=args.apply_stop_condition
         )
 
+        # open dashboard
+        if args.open_dashboard:
+            open_dashboard(args.experiment_path)
+
+        if args.distributed_coach and args.distributed_coach_run_type != RunType.ORCHESTRATOR:
+            handle_distributed_coach_tasks(graph_manager, args, task_parameters)
+            return
+
+        if args.distributed_coach and args.distributed_coach_run_type == RunType.ORCHESTRATOR:
+            handle_distributed_coach_orchestrator(args)
+            return
+
+        # Single-threaded runs
+        if args.num_workers == 1:
+            self.start_single_threaded(task_parameters, graph_manager, args)
+        else:
+            self.start_multi_threaded(graph_manager, args)
+
+    def start_single_threaded(self, task_parameters, graph_manager: 'GraphManager', args: argparse.Namespace):
+        # Start the training or evaluation
         start_graph(graph_manager=graph_manager, task_parameters=task_parameters)
 
     def start_multi_threaded(self, graph_manager: 'GraphManager', args: argparse.Namespace):

rl_coach/memories/backend/redis.py

@@ -111,6 +111,7 @@ class RedisPubSubBackend(MemoryBackend):
             return False
 
     def undeploy(self):
+        from kubernetes import client
         if self.params.deployed:
             return
 

rl_coach/orchestrators/kubernetes_orchestrator.py

@@ -2,9 +2,11 @@ import os
 import uuid
 import json
 import time
+import sys
 from enum import Enum
 from typing import List
 from configparser import ConfigParser, Error
+from multiprocessing import Process
 
 from rl_coach.base_parameters import RunType
 from rl_coach.orchestrators.deploy import Deploy, DeployParameters
@@ -255,8 +257,35 @@ class Kubernetes(Deploy):
             print("Got exception: %s\n while creating Job", e)
             return False
 
-    def worker_logs(self):
-        pass
+    def worker_logs(self, path='./logs'):
+        worker_params = self.params.run_type_params.get(str(RunType.ROLLOUT_WORKER), None)
+        if not worker_params:
+            return
+
+        api_client = k8sclient.CoreV1Api()
+        pods = None
+        try:
+            pods = api_client.list_namespaced_pod(self.params.namespace, label_selector='app={}'.format(
+                worker_params.orchestration_params['job_name']
+            ))
+
+            # pod = pods.items[0]
+        except k8sclient.rest.ApiException as e:
+            print("Got exception: %s\n while reading pods", e)
+            return
+
+        if not pods or len(pods.items) == 0:
+            return
+
+        for pod in pods.items:
+            Process(target=self._tail_log_file, args=(pod.metadata.name, api_client, self.params.namespace, path)).start()
+
+    def _tail_log_file(self, pod_name, api_client, namespace, path):
+        if not os.path.exists(path):
+            os.mkdir(path)
+
+        sys.stdout = open(os.path.join(path, pod_name), 'w')
+        self.tail_log(pod_name, api_client)
 
     def trainer_logs(self):
         trainer_params = self.params.run_type_params.get(str(RunType.TRAINER), None)

rl_coach/rollout_worker.py

@@ -68,21 +68,17 @@ def get_latest_checkpoint(checkpoint_dir):
         rel_path = os.path.relpath(ckpt.model_checkpoint_path, checkpoint_dir)
         return int(rel_path.split('_Step')[0])
 
-    return 0
-
 
 def should_stop(checkpoint_dir):
     return os.path.exists(os.path.join(checkpoint_dir, SyncFiles.FINISHED.value))
 
 
-def rollout_worker(graph_manager, checkpoint_dir, data_store, num_workers):
+def rollout_worker(graph_manager, data_store, num_workers, task_parameters):
     """
     wait for first checkpoint then perform rollouts using the model
     """
-    wait_for_checkpoint(checkpoint_dir)
-
-    task_parameters = TaskParameters()
-    task_parameters.__dict__['checkpoint_restore_dir'] = checkpoint_dir
+    checkpoint_dir = task_parameters.checkpoint_restore_dir
+    wait_for_checkpoint(checkpoint_dir, data_store)
 
     graph_manager.create_graph(task_parameters)
     with graph_manager.phase_context(RunPhase.TRAIN):

rl_coach/training_worker.py

@@ -12,14 +12,11 @@ def data_store_ckpt_save(data_store):
         time.sleep(10)
 
 
-def training_worker(graph_manager, checkpoint_dir):
+def training_worker(graph_manager, task_parameters):
     """
     restore a checkpoint then perform rollouts using the restored model
     """
     # initialize graph
-    task_parameters = TaskParameters()
-    task_parameters.__dict__['checkpoint_save_dir'] = checkpoint_dir
-    task_parameters.__dict__['checkpoint_save_secs'] = 20
     graph_manager.create_graph(task_parameters)
 
     # save randomly initialized graph