148 lines
5.0 KiB
Python
148 lines
5.0 KiB
Python
import grpc
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from google.protobuf.wrappers_pb2 import BoolValue
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import rawfile_util
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from csi import csi_pb2, csi_pb2_grpc
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from orchestrator.k8s import volume_to_node, run_on_node
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from rawfile_util import attach_loop
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from remote import init_rawfile, scrub
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from util import log_grpc_request, run
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NODE_NAME_TOPOLOGY_KEY = "hostname"
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class RawFileIdentityServicer(csi_pb2_grpc.IdentityServicer):
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@log_grpc_request
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def GetPluginInfo(self, request, context):
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return csi_pb2.GetPluginInfoResponse(
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name="rawfile.hamravesh.com", vendor_version="0.0.1"
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)
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@log_grpc_request
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def GetPluginCapabilities(self, request, context):
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Cap = csi_pb2.PluginCapability
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return csi_pb2.GetPluginCapabilitiesResponse(
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capabilities=[
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Cap(service=Cap.Service(type=Cap.Service.CONTROLLER_SERVICE)),
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Cap(
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service=Cap.Service(
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type=Cap.Service.VOLUME_ACCESSIBILITY_CONSTRAINTS
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)
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),
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]
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)
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@log_grpc_request
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def Probe(self, request, context):
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return csi_pb2.ProbeResponse(ready=BoolValue(value=True))
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class RawFileNodeServicer(csi_pb2_grpc.NodeServicer):
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def __init__(self, node_name):
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self.node_name = node_name
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@log_grpc_request
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def NodeGetCapabilities(self, request, context):
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return csi_pb2.NodeGetCapabilitiesResponse(capabilities=[])
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@log_grpc_request
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def NodePublishVolume(self, request, context):
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mount_path = request.target_path
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img_file = rawfile_util.img_file(request.volume_id)
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loop_file = attach_loop(img_file)
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run(f"mount {loop_file} {mount_path}")
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return csi_pb2.NodePublishVolumeResponse()
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@log_grpc_request
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def NodeUnpublishVolume(self, request, context):
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mount_path = request.target_path
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run(f"umount {mount_path}")
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return csi_pb2.NodeUnpublishVolumeResponse()
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@log_grpc_request
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def NodeGetInfo(self, request, context):
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return csi_pb2.NodeGetInfoResponse(
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node_id=self.node_name,
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accessible_topology=csi_pb2.Topology(
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segments={NODE_NAME_TOPOLOGY_KEY: self.node_name}
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),
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)
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class RawFileControllerServicer(csi_pb2_grpc.ControllerServicer):
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@log_grpc_request
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def ControllerGetCapabilities(self, request, context):
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Cap = csi_pb2.ControllerServiceCapability
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return csi_pb2.ControllerGetCapabilitiesResponse(
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capabilities=[Cap(rpc=Cap.RPC(type=Cap.RPC.CREATE_DELETE_VOLUME))]
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)
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@log_grpc_request
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def CreateVolume(self, request, context):
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# TODO: volume_capabilities
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if len(request.volume_capabilities) != 1:
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context.abort(
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grpc.StatusCode.INVALID_ARGUMENT, "Exactly one cap is supported"
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)
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volume_capability = request.volume_capabilities[0]
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AccessModeEnum = csi_pb2.VolumeCapability.AccessMode.Mode
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if volume_capability.access_mode.mode not in [
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AccessModeEnum.SINGLE_NODE_WRITER
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]:
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context.abort(
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grpc.StatusCode.INVALID_ARGUMENT,
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f"Unsupported access mode: {AccessModeEnum.Name(volume_capability.access_mode.mode)}",
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)
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access_type = volume_capability.WhichOneof("access_type")
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if access_type == "mount":
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pass
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elif access_type == "block":
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context.abort(
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grpc.StatusCode.INVALID_ARGUMENT, "Block mode not supported (yet)"
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)
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else:
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context.abort(
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grpc.StatusCode.INVALID_ARGUMENT, f"Unknown access type: {access_type}"
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)
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size = request.capacity_range.required_bytes
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size = max(size, 10 * 1024 * 1024) # At least 10MB
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try:
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node_name = request.accessibility_requirements.preferred[0].segments[
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NODE_NAME_TOPOLOGY_KEY
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]
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except IndexError:
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context.abort(
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grpc.StatusCode.INVALID_ARGUMENT,
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"No preferred topology set. Is external-provisioner running in strict-topology mode?",
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)
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except KeyError:
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context.abort(
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grpc.StatusCode.INVALID_ARGUMENT, "Topology key not found... why?"
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)
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run_on_node(
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init_rawfile.as_cmd(volume_id=request.name, size=size), node=node_name
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)
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return csi_pb2.CreateVolumeResponse(
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volume=csi_pb2.Volume(
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volume_id=request.name,
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capacity_bytes=size,
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accessible_topology=[
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csi_pb2.Topology(segments={NODE_NAME_TOPOLOGY_KEY: node_name})
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],
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)
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)
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@log_grpc_request
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def DeleteVolume(self, request, context):
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node_name = volume_to_node(request.volume_id)
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run_on_node(scrub.as_cmd(volume_id=request.volume_id), node=node_name)
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return csi_pb2.DeleteVolumeResponse()
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