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Added data store backend. (#17)
* Added data store backend. * Add NFS implementation for Kubernetes. * Added S3 data store implementation. * Addressed review comments.
This commit is contained in:
Balaji Subramaniam
committed by
zach dwiel
zach dwiel
parent
6b2de6ba6d
commit
1c238b4c60
219
rl_coach/data_stores/nfs_data_store.py
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219
rl_coach/data_stores/nfs_data_store.py
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from rl_coach.data_stores.data_store import DataStore, DataStoreParameters
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from kubernetes import client as k8sclient
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class NFSDataStoreParameters(DataStoreParameters):
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def __init__(self, ds_params, deployed=False, server=None, path=None):
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super().__init__(ds_params.store_type, ds_params.orchestrator_type, ds_params.orchestrator_params)
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self.namespace = "default"
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if "namespace" in ds_params.orchestrator_params:
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self.namespace = ds_params.orchestrator_params["namespace"]
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self.name = None
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self.pvc_name = None
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self.pv_name = None
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self.svc_name = None
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self.server = None
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self.path = "/"
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self.deployed = deployed
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if deployed:
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self.server = server
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self.path = path
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class NFSDataStore(DataStore):
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def __init__(self, params: NFSDataStoreParameters):
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self.params = params
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def deploy(self) -> bool:
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if self.params.orchestrator_type == "kubernetes":
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if not self.params.deployed:
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if not self.deploy_k8s_nfs():
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return False
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if not self.create_k8s_nfs_resources():
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return False
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return True
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def get_info(self):
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return k8sclient.V1PersistentVolumeClaimVolumeSource(
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claim_name=self.params.pvc_name
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)
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def undeploy(self) -> bool:
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if self.params.orchestrator_type == "kubernetes":
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if not self.params.deployed:
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if not self.undeploy_k8s_nfs():
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return False
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if not self.delete_k8s_nfs_resources():
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return False
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return True
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def save_to_store(self):
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pass
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def load_from_store(self):
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pass
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def deploy_k8s_nfs(self) -> bool:
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name = "nfs-server"
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container = k8sclient.V1Container(
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name=name,
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image="k8s.gcr.io/volume-nfs:0.8",
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ports=[k8sclient.V1ContainerPort(
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name="nfs",
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container_port=2049,
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protocol="TCP"
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)]
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)
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template = k8sclient.V1PodTemplateSpec(
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metadata=k8sclient.V1ObjectMeta(labels={'app': 'nfs-server'}),
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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=1,
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template=template,
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selector=k8sclient.V1LabelSelector(
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match_labels={'app': 'nfs-server'}
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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, labels={'app': 'nfs-server'}),
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spec=deployment_spec
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)
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k8s_apps_v1_api_client = k8sclient.AppsV1Api()
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try:
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k8s_apps_v1_api_client.create_namespaced_deployment(self.params.namespace, deployment)
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self.params.name = name
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except k8sclient.rest.ApiException as e:
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print("Got exception: %s\n while creating nfs-server", e)
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return False
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k8s_core_v1_api_client = k8sclient.CoreV1Api()
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svc_name = "nfs-service"
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service = k8sclient.V1Service(
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api_version='v1',
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kind='Service',
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metadata=k8sclient.V1ObjectMeta(
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name=svc_name
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),
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spec=k8sclient.V1ServiceSpec(
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selector={'app': self.params.name},
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ports=[k8sclient.V1ServicePort(
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protocol='TCP',
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port=2049,
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target_port=2049
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)]
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)
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)
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try:
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k8s_core_v1_api_client.create_namespaced_service(self.params.namespace, service)
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self.params.svc_name = svc_name
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self.params.server = 'nfs-service.{}.svc'.format(self.params.namespace)
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except k8sclient.rest.ApiException as e:
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print("Got exception: %s\n while creating a service for nfs-server", e)
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return False
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return True
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def create_k8s_nfs_resources(self) -> bool:
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pv_name = "nfs-ckpt-pv"
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persistent_volume = k8sclient.V1PersistentVolume(
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api_version="v1",
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kind="PersistentVolume",
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metadata=k8sclient.V1ObjectMeta(
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name=pv_name,
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labels={'app': pv_name}
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),
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spec=k8sclient.V1PersistentVolumeSpec(
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access_modes=["ReadWriteMany"],
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nfs=k8sclient.V1NFSVolumeSource(
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path=self.params.path,
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server=self.params.server
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),
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capacity={'storage': '10Gi'},
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storage_class_name=""
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)
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)
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k8s_api_client = k8sclient.CoreV1Api()
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try:
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k8s_api_client.create_persistent_volume(persistent_volume)
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self.params.pv_name = pv_name
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except k8sclient.rest.ApiException as e:
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print("Got exception: %s\n while creating the NFS PV", e)
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return False
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pvc_name = "nfs-ckpt-pvc"
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persistent_volume_claim = k8sclient.V1PersistentVolumeClaim(
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api_version="v1",
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kind="PersistentVolumeClaim",
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metadata=k8sclient.V1ObjectMeta(
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name=pvc_name
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),
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spec=k8sclient.V1PersistentVolumeClaimSpec(
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access_modes=["ReadWriteMany"],
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resources=k8sclient.V1ResourceRequirements(
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requests={'storage': '10Gi'}
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),
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selector=k8sclient.V1LabelSelector(
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match_labels={'app': self.params.pv_name}
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),
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storage_class_name=""
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)
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)
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try:
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k8s_api_client.create_namespaced_persistent_volume_claim(self.params.namespace, persistent_volume_claim)
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self.params.pvc_name = pvc_name
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except k8sclient.rest.ApiException as e:
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print("Got exception: %s\n while creating the NFS PVC", e)
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return False
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return True
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def undeploy_k8s_nfs(self) -> bool:
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del_options = k8sclient.V1DeleteOptions()
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k8s_apps_v1_api_client = k8sclient.AppsV1Api()
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try:
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k8s_apps_v1_api_client.delete_namespaced_deployment(self.params.name, self.params.namespace, del_options)
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except k8sclient.rest.ApiException as e:
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print("Got exception: %s\n while deleting nfs-server", e)
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return False
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k8s_core_v1_api_client = k8sclient.CoreV1Api()
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try:
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k8s_core_v1_api_client.delete_namespaced_service(self.params.svc_name, self.params.namespace, del_options)
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except k8sclient.rest.ApiException as e:
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print("Got exception: %s\n while deleting the service for nfs-server", e)
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return False
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return True
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def delete_k8s_nfs_resources(self) -> bool:
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del_options = k8sclient.V1DeleteOptions()
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k8s_api_client = k8sclient.CoreV1Api()
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try:
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k8s_api_client.delete_persistent_volume(self.params.pv_name, del_options)
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except k8sclient.rest.ApiException as e:
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print("Got exception: %s\n while deleting NFS PV", e)
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return False
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try:
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k8s_api_client.delete_namespaced_persistent_volume_claim(self.params.pvc_name, self.params.namespace, del_options)
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except k8sclient.rest.ApiException as e:
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print("Got exception: %s\n while deleting NFS PVC", e)
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return False
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return True
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