mirror of
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322 lines
13 KiB
Python
322 lines
13 KiB
Python
import os
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import uuid
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import json
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import time
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from typing import List
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from configparser import ConfigParser, Error
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from rl_coach.orchestrators.deploy import Deploy, DeployParameters
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from kubernetes import client as k8sclient, config as k8sconfig
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from rl_coach.memories.backend.memory import MemoryBackendParameters
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from rl_coach.memories.backend.memory_impl import get_memory_backend
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from rl_coach.data_stores.data_store import DataStoreParameters
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from rl_coach.data_stores.data_store_impl import get_data_store
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class RunTypeParameters():
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def __init__(self, image: str, command: list(), arguments: list() = None,
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run_type: str = "trainer", checkpoint_dir: str = "/checkpoint",
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num_replicas: int = 1, orchestration_params: dict=None):
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self.image = image
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self.command = command
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if not arguments:
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arguments = list()
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self.arguments = arguments
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self.run_type = run_type
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self.checkpoint_dir = checkpoint_dir
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self.num_replicas = num_replicas
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if not orchestration_params:
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orchestration_params = dict()
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self.orchestration_params = orchestration_params
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class KubernetesParameters(DeployParameters):
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def __init__(self, run_type_params: List[RunTypeParameters], kubeconfig: str = None, namespace: str = None,
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nfs_server: str = None, nfs_path: str = None, checkpoint_dir: str = '/checkpoint',
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memory_backend_parameters: MemoryBackendParameters = None, data_store_params: DataStoreParameters = None):
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self.run_type_params = {}
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for run_type_param in run_type_params:
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self.run_type_params[run_type_param.run_type] = run_type_param
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self.kubeconfig = kubeconfig
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self.namespace = namespace
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self.nfs_server = nfs_server
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self.nfs_path = nfs_path
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self.checkpoint_dir = checkpoint_dir
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self.memory_backend_parameters = memory_backend_parameters
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self.data_store_params = data_store_params
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class Kubernetes(Deploy):
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def __init__(self, params: KubernetesParameters):
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super().__init__(params)
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self.params = params
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if self.params.kubeconfig:
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k8sconfig.load_kube_config()
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else:
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k8sconfig.load_incluster_config()
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if not self.params.namespace:
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_, current_context = k8sconfig.list_kube_config_contexts()
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self.params.namespace = current_context['context']['namespace']
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if os.environ.get('http_proxy'):
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k8sclient.Configuration._default.proxy = os.environ.get('http_proxy')
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self.params.memory_backend_parameters.orchestrator_params = {'namespace': self.params.namespace}
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self.memory_backend = get_memory_backend(self.params.memory_backend_parameters)
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self.params.data_store_params.orchestrator_params = {'namespace': self.params.namespace}
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self.data_store = get_data_store(self.params.data_store_params)
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if self.params.data_store_params.store_type == "s3":
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self.s3_access_key = None
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self.s3_secret_key = None
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if self.params.data_store_params.creds_file:
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s3config = ConfigParser()
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s3config.read(self.params.data_store_params.creds_file)
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try:
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self.s3_access_key = s3config.get('default', 'aws_access_key_id')
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self.s3_secret_key = s3config.get('default', 'aws_secret_access_key')
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except Error as e:
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print("Error when reading S3 credentials file: %s", e)
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else:
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self.s3_access_key = os.environ.get('ACCESS_KEY_ID')
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self.s3_secret_key = os.environ.get('SECRET_ACCESS_KEY')
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def setup(self) -> bool:
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self.memory_backend.deploy()
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if not self.data_store.deploy():
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return False
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if self.params.data_store_params.store_type == "nfs":
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self.nfs_pvc = self.data_store.get_info()
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return True
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def deploy_trainer(self) -> bool:
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trainer_params = self.params.run_type_params.get('trainer', None)
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if not trainer_params:
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return False
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trainer_params.command += ['--memory-backend-params', json.dumps(self.params.memory_backend_parameters.__dict__)]
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trainer_params.command += ['--data-store-params', json.dumps(self.params.data_store_params.__dict__)]
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name = "{}-{}".format(trainer_params.run_type, uuid.uuid4())
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if self.params.data_store_params.store_type == "nfs":
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container = k8sclient.V1Container(
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name=name,
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image=trainer_params.image,
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command=trainer_params.command,
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args=trainer_params.arguments,
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image_pull_policy='Always',
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volume_mounts=[k8sclient.V1VolumeMount(
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name='nfs-pvc',
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mount_path=trainer_params.checkpoint_dir
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)]
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)
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template = k8sclient.V1PodTemplateSpec(
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metadata=k8sclient.V1ObjectMeta(labels={'app': name}),
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spec=k8sclient.V1PodSpec(
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containers=[container],
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volumes=[k8sclient.V1Volume(
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name="nfs-pvc",
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persistent_volume_claim=self.nfs_pvc
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)]
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),
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)
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else:
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container = k8sclient.V1Container(
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name=name,
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image=trainer_params.image,
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command=trainer_params.command,
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args=trainer_params.arguments,
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image_pull_policy='Always',
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env=[k8sclient.V1EnvVar("ACCESS_KEY_ID", self.s3_access_key),
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k8sclient.V1EnvVar("SECRET_ACCESS_KEY", self.s3_secret_key)]
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)
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template = k8sclient.V1PodTemplateSpec(
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metadata=k8sclient.V1ObjectMeta(labels={'app': name}),
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spec=k8sclient.V1PodSpec(
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containers=[container]
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),
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)
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deployment_spec = k8sclient.V1DeploymentSpec(
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replicas=trainer_params.num_replicas,
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template=template,
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selector=k8sclient.V1LabelSelector(
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match_labels={'app': name}
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)
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)
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deployment = k8sclient.V1Deployment(
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api_version='apps/v1',
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kind='Deployment',
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metadata=k8sclient.V1ObjectMeta(name=name),
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spec=deployment_spec
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)
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api_client = k8sclient.AppsV1Api()
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try:
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api_client.create_namespaced_deployment(self.params.namespace, deployment)
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trainer_params.orchestration_params['deployment_name'] = name
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return True
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except k8sclient.rest.ApiException as e:
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print("Got exception: %s\n while creating deployment", e)
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return False
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def deploy_worker(self):
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worker_params = self.params.run_type_params.get('worker', None)
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if not worker_params:
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return False
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worker_params.command += ['--memory-backend-params', json.dumps(self.params.memory_backend_parameters.__dict__)]
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worker_params.command += ['--data-store-params', json.dumps(self.params.data_store_params.__dict__)]
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worker_params.command += ['--num-workers', '{}'.format(worker_params.num_replicas)]
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name = "{}-{}".format(worker_params.run_type, uuid.uuid4())
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if self.params.data_store_params.store_type == "nfs":
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container = k8sclient.V1Container(
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name=name,
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image=worker_params.image,
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command=worker_params.command,
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args=worker_params.arguments,
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image_pull_policy='Always',
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volume_mounts=[k8sclient.V1VolumeMount(
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name='nfs-pvc',
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mount_path=worker_params.checkpoint_dir
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)]
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)
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template = k8sclient.V1PodTemplateSpec(
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metadata=k8sclient.V1ObjectMeta(labels={'app': name}),
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spec=k8sclient.V1PodSpec(
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containers=[container],
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volumes=[k8sclient.V1Volume(
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name="nfs-pvc",
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persistent_volume_claim=self.nfs_pvc
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)],
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),
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)
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else:
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container = k8sclient.V1Container(
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name=name,
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image=worker_params.image,
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command=worker_params.command,
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args=worker_params.arguments,
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image_pull_policy='Always',
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env=[k8sclient.V1EnvVar("ACCESS_KEY_ID", self.s3_access_key),
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k8sclient.V1EnvVar("SECRET_ACCESS_KEY", self.s3_secret_key)]
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)
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template = k8sclient.V1PodTemplateSpec(
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metadata=k8sclient.V1ObjectMeta(labels={'app': name}),
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spec=k8sclient.V1PodSpec(
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containers=[container]
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)
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)
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deployment_spec = k8sclient.V1DeploymentSpec(
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replicas=worker_params.num_replicas,
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template=template,
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selector=k8sclient.V1LabelSelector(
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match_labels={'app': name}
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)
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)
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deployment = k8sclient.V1Deployment(
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api_version='apps/v1',
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kind="Deployment",
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metadata=k8sclient.V1ObjectMeta(name=name),
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spec=deployment_spec
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)
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api_client = k8sclient.AppsV1Api()
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try:
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api_client.create_namespaced_deployment(self.params.namespace, deployment)
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worker_params.orchestration_params['deployment_name'] = name
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return True
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except k8sclient.rest.ApiException as e:
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print("Got exception: %s\n while creating deployment", e)
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return False
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def worker_logs(self):
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pass
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def trainer_logs(self):
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trainer_params = self.params.run_type_params.get('trainer', None)
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if not trainer_params:
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return
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api_client = k8sclient.CoreV1Api()
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pod = None
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try:
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pods = api_client.list_namespaced_pod(self.params.namespace, label_selector='app={}'.format(
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trainer_params.orchestration_params['deployment_name']
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))
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pod = pods.items[0]
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except k8sclient.rest.ApiException as e:
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print("Got exception: %s\n while reading pods", e)
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return
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if not pod:
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return
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self.tail_log(pod.metadata.name, api_client)
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def tail_log(self, pod_name, corev1_api):
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while True:
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time.sleep(10)
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# Try to tail the pod logs
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try:
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print(corev1_api.read_namespaced_pod_log(
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pod_name, self.params.namespace, follow=True
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), flush=True)
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except k8sclient.rest.ApiException as e:
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pass
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# This part will get executed if the pod is one of the following phases: not ready, failed or terminated.
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# Check if the pod has errored out, else just try again.
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# Get the pod
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try:
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pod = corev1_api.read_namespaced_pod(pod_name, self.params.namespace)
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except k8sclient.rest.ApiException as e:
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continue
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if not hasattr(pod, 'status') or not pod.status:
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continue
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if not hasattr(pod.status, 'container_statuses') or not pod.status.container_statuses:
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continue
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for container_status in pod.status.container_statuses:
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if container_status.state.waiting is not None:
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if container_status.state.waiting.reason == 'Error' or \
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container_status.state.waiting.reason == 'CrashLoopBackOff' or \
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container_status.state.waiting.reason == 'ImagePullBackOff' or \
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container_status.state.waiting.reason == 'ErrImagePull':
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return
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if container_status.state.terminated is not None:
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return
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def undeploy(self):
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trainer_params = self.params.run_type_params.get('trainer', None)
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api_client = k8sclient.AppsV1Api()
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delete_options = k8sclient.V1DeleteOptions()
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if trainer_params:
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try:
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api_client.delete_namespaced_deployment(trainer_params.orchestration_params['deployment_name'], self.params.namespace, delete_options)
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except k8sclient.rest.ApiException as e:
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print("Got exception: %s\n while deleting trainer", e)
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worker_params = self.params.run_type_params.get('worker', None)
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if worker_params:
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try:
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api_client.delete_namespaced_deployment(worker_params.orchestration_params['deployment_name'], self.params.namespace, delete_options)
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except k8sclient.rest.ApiException as e:
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print("Got exception: %s\n while deleting workers", e)
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self.memory_backend.undeploy()
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self.data_store.undeploy()
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