rawfile-localpv/bd2fs.py
2022-03-30 12:47:14 +04:30

221 lines
8.1 KiB
Python

from pathlib import Path
import grpc
from csi import csi_pb2, csi_pb2_grpc
from csi.csi_pb2 import (
NodeStageVolumeRequest,
NodePublishVolumeRequest,
NodeUnpublishVolumeRequest,
NodeUnstageVolumeRequest,
NodeExpandVolumeRequest,
CreateVolumeRequest,
)
from declarative import (
be_mounted,
be_unmounted,
be_absent,
be_formatted,
be_fs_expanded,
)
from fs_util import path_stats, mountpoint_to_dev
from util import log_grpc_request
def get_fs(request):
fs_type = request.volume_capability.mount.fs_type
if fs_type == "":
fs_type = "ext4"
return fs_type
class Bd2FsIdentityServicer(csi_pb2_grpc.IdentityServicer):
def __init__(self, bds: csi_pb2_grpc.IdentityServicer):
self.bds = bds
@log_grpc_request
def GetPluginInfo(self, request, context):
return self.bds.GetPluginInfo(request, context)
@log_grpc_request
def GetPluginCapabilities(self, request, context):
return self.bds.GetPluginCapabilities(request, context)
# @log_grpc_request
def Probe(self, request, context):
return self.bds.Probe(request, context)
class Bd2FsNodeServicer(csi_pb2_grpc.NodeServicer):
def __init__(self, bds: csi_pb2_grpc.NodeServicer):
self.bds = bds
# @log_grpc_request
def NodeGetCapabilities(self, request, context):
return self.bds.NodeGetCapabilities(request, context)
@log_grpc_request
def NodePublishVolume(self, request, context):
staging_dev = f"{request.staging_target_path}/device"
Path(request.target_path).mkdir(exist_ok=True)
be_mounted(dev=staging_dev, mountpoint=request.target_path)
return csi_pb2.NodePublishVolumeResponse()
@log_grpc_request
def NodeUnpublishVolume(self, request, context):
be_unmounted(request.target_path)
be_absent(request.target_path)
return csi_pb2.NodeUnpublishVolumeResponse()
@log_grpc_request
def NodeGetInfo(self, request, context):
return self.bds.NodeGetInfo(request, context)
@log_grpc_request
def NodeStageVolume(self, request, context):
bd_stage_request = NodeStageVolumeRequest()
bd_stage_request.CopyFrom(request)
bd_stage_request.staging_target_path = f"{request.staging_target_path}/block"
Path(bd_stage_request.staging_target_path).mkdir(exist_ok=True)
self.bds.NodeStageVolume(bd_stage_request, context)
bd_publish_request = NodePublishVolumeRequest()
bd_publish_request.volume_id = request.volume_id
bd_publish_request.publish_context.update(request.publish_context)
bd_publish_request.staging_target_path = bd_stage_request.staging_target_path
bd_publish_request.target_path = f"{request.staging_target_path}/device"
bd_publish_request.volume_capability.CopyFrom(request.volume_capability)
bd_publish_request.readonly = False
bd_publish_request.secrets.update(request.secrets)
bd_publish_request.volume_context.update(request.volume_context)
self.bds.NodePublishVolume(bd_publish_request, context)
mount_path = f"{request.staging_target_path}/mount"
Path(mount_path).mkdir(exist_ok=True)
be_formatted(dev=bd_publish_request.target_path, fs=get_fs(request))
be_mounted(dev=bd_publish_request.target_path, mountpoint=mount_path)
return csi_pb2.NodeStageVolumeResponse()
@log_grpc_request
def NodeUnstageVolume(self, request, context):
mount_path = f"{request.staging_target_path}/mount"
be_unmounted(mount_path)
be_absent(mount_path)
bd_unpublish_request = NodeUnpublishVolumeRequest()
bd_unpublish_request.volume_id = request.volume_id
bd_unpublish_request.target_path = f"{request.staging_target_path}/device"
self.bds.NodeUnpublishVolume(bd_unpublish_request, context)
bd_unstage_request = NodeUnstageVolumeRequest()
bd_unstage_request.CopyFrom(request)
bd_unstage_request.staging_target_path = f"{request.staging_target_path}/block"
self.bds.NodeUnstageVolume(bd_unstage_request, context)
be_absent(bd_unstage_request.staging_target_path)
return csi_pb2.NodeUnstageVolumeResponse()
# @log_grpc_request
def NodeGetVolumeStats(self, request, context):
volume_path = request.volume_path
stats = path_stats(volume_path)
return csi_pb2.NodeGetVolumeStatsResponse(
usage=[
csi_pb2.VolumeUsage(
available=stats["fs_avail"],
total=stats["fs_size"],
used=stats["fs_size"] - stats["fs_avail"],
unit=csi_pb2.VolumeUsage.Unit.BYTES,
),
csi_pb2.VolumeUsage(
available=stats["fs_files_avail"],
total=stats["fs_files"],
used=stats["fs_files"] - stats["fs_files_avail"],
unit=csi_pb2.VolumeUsage.Unit.INODES,
),
]
)
@log_grpc_request
def NodeExpandVolume(self, request, context):
# FIXME: hacky way to determine if `volume_path` is staged path, or the mount itself
# Based on CSI 1.4.0 specifications:
# > The staging_target_path field is not required, for backwards compatibility, but the CO SHOULD supply it.
# Apparently, k8s 1.18 does not supply it. So:
dev_path = mountpoint_to_dev(request.volume_path)
volume_path = request.volume_path
if dev_path is None:
dev_path = f"{request.volume_path}/device"
volume_path = f"{request.volume_path}/mount"
bd_request = NodeExpandVolumeRequest()
bd_request.CopyFrom(request)
bd_request.volume_path = dev_path
self.bds.NodeExpandVolume(bd_request, context)
# Based on CSI 1.4.0 specifications:
# > If volume_capability is omitted the SP MAY determine
# > access_type from given volume_path for the volume and perform
# > node expansion.
# Apparently k8s 1.18 omits this field.
be_fs_expanded(bd_request.volume_path, volume_path)
size = request.capacity_range.required_bytes
return csi_pb2.NodeExpandVolumeResponse(capacity_bytes=size)
class Bd2FsControllerServicer(csi_pb2_grpc.ControllerServicer):
def __init__(self, bds: csi_pb2_grpc.ControllerServicer):
self.bds = bds
@log_grpc_request
def ControllerGetCapabilities(self, request, context):
return self.bds.ControllerGetCapabilities(request, context)
@log_grpc_request
def CreateVolume(self, request, context):
# TODO: volume_capabilities
if len(request.volume_capabilities) != 1:
context.abort(
grpc.StatusCode.INVALID_ARGUMENT, "Exactly one cap is supported"
)
volume_capability = request.volume_capabilities[0]
AccessModeEnum = csi_pb2.VolumeCapability.AccessMode.Mode
if volume_capability.access_mode.mode not in [
AccessModeEnum.SINGLE_NODE_WRITER
]:
context.abort(
grpc.StatusCode.INVALID_ARGUMENT,
f"Unsupported access mode: {AccessModeEnum.Name(volume_capability.access_mode.mode)}",
)
access_type = volume_capability.WhichOneof("access_type")
assert access_type == "mount"
bd_request = CreateVolumeRequest()
bd_request.CopyFrom(request)
bd_request.capacity_range.required_bytes = max(
request.capacity_range.required_bytes, 10 * 1024 * 1024
) # At least 10MB
# FIXME: update access_type
# bd_request.volume_capabilities[0].block = ""
# bd_request.volume_capabilities[0].mount = None
return self.bds.CreateVolume(bd_request, context)
@log_grpc_request
def DeleteVolume(self, request, context):
return self.bds.DeleteVolume(request, context)
def GetCapacity(self, request, context):
return self.bds.GetCapacity(request, context)
@log_grpc_request
def ControllerExpandVolume(self, request, context):
response = self.bds.ControllerExpandVolume(request, context)
assert response.node_expansion_required
return response