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This plugin allows to create raid, logical volume store and logical volumes on the Kalray DPU. Signed-off-by: Guillaume <[email protected]>
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#!/usr/bin/python3 | ||
"""XAPI plugin to manage Kalray DPU.""" | ||
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import json | ||
import XenAPIPlugin # pylint: disable=import-error | ||
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from kalray.acs.spdk import rpc # pylint: disable=import-error | ||
from xcpngutils import error_wrapped | ||
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class KalrayCmd: | ||
"""Describe a command to be ran on the Kalray DPU.""" | ||
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def __init__(self, rpc_name: str, updates: dict): | ||
self.server = 'localhost' | ||
self.port = 8080 | ||
self.username = None | ||
self.password = None | ||
self.timeout = 60.0 | ||
self.rpc_name = rpc_name | ||
self.rpc_params = {} # will be updated using add_rpc_params | ||
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for k, v in updates.items(): | ||
if hasattr(self, k): | ||
setattr(self, k, v) | ||
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# Check that username & password are well set | ||
if self.username is None: | ||
raise XenAPIPlugin.Failure("-1", ["'username' is required"]) | ||
if self.password is None: | ||
raise XenAPIPlugin.Failure("-1", ["'password' is required"]) | ||
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def add_rpc_params(self, key, value): | ||
"""Adds a parameter that will be passed to the RPC.""" | ||
self.rpc_params[key] = value | ||
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def call_rpc(self): | ||
"""Do the RPC call.""" | ||
try: | ||
client = rpc.client.HTTPJSONRPCClient( | ||
self.server, | ||
self.port, | ||
self.timeout, | ||
self.username, | ||
self.password, | ||
log_level="ERROR") | ||
message = client.call(self.rpc_name, self.rpc_params) | ||
except rpc.client.JSONRPCException as exc: | ||
raise XenAPIPlugin.Failure("-1", [exc.message]) | ||
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return json.dumps(message) | ||
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@error_wrapped | ||
def get_devices(_session, args): | ||
"""Get the list of devices available on the Kalray DPU.""" | ||
kc = KalrayCmd("bdev_get_bdevs", args) | ||
return kc.call_rpc() | ||
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@error_wrapped | ||
def create_raid(_session, args): | ||
"""Create a raid.""" | ||
kc = KalrayCmd("bdev_raid_create", args) | ||
try: | ||
raid_name = args["raid_name"] | ||
raid_level = args["raid_level"] | ||
base_bdevs = args["base_bdevs"] | ||
except KeyError as msg: | ||
raise XenAPIPlugin.Failure("-1", [f"Key {msg} is missing"]) | ||
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# Sanity checks | ||
if raid_level not in ["raid0", "raid1", "raid10"]: | ||
raise XenAPIPlugin.Failure("-1", ["Only raid0, raid1 and raid10 are supported"]) | ||
# TODO: check that bdevs are "NVMe disk" | ||
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kc.add_rpc_params("name", raid_name) | ||
kc.add_rpc_params("raid_level", raid_level) | ||
kc.add_rpc_params("base_bdevs", base_bdevs.split(',')) | ||
kc.add_rpc_params("strip_size_kb", 128) | ||
kc.add_rpc_params("persist", True) | ||
kc.add_rpc_params("split_dp", True) | ||
return kc.call_rpc() | ||
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@error_wrapped | ||
def get_raids(_session, args): | ||
"""Get the list of raids available on the Kalray DPU.""" | ||
kc = KalrayCmd("bdev_raid_get_bdevs", args) | ||
kc.add_rpc_params("category", "all") | ||
return kc.call_rpc() | ||
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@error_wrapped | ||
def create_lvs(_session, args): | ||
"""Create a logical volume store.""" | ||
kc = KalrayCmd("bdev_lvol_create_lvstore", args) | ||
try: | ||
lvs_name = args["lvs_name"] | ||
bdev_name = args["bdev_name"] | ||
except KeyError as msg: | ||
raise XenAPIPlugin.Failure("-1", [f"Key {msg} is missing"]) | ||
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kc.add_rpc_params("lvs_name", lvs_name) | ||
kc.add_rpc_params("bdev_name", bdev_name) | ||
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return kc.call_rpc() | ||
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@error_wrapped | ||
def get_lvs(_session, args): | ||
"""Get the list of logical volume stores available on the Kalray DPU.""" | ||
kc = KalrayCmd("bdev_lvol_get_lvstores", args) | ||
return kc.call_rpc() | ||
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@error_wrapped | ||
def create_lvol(_session, args): | ||
"""Create a new lvol on the Kalray DPU.""" | ||
kc = KalrayCmd("bdev_lvol_create", args) | ||
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try: | ||
lvol_name = args["lvol_name"] | ||
lvol_size = int(args["lvol_size_mb"]) | ||
lvs_name = args["lvs_name"] | ||
except KeyError as msg: | ||
raise XenAPIPlugin.Failure("-1", [f"Key {msg} is missing"]) | ||
except ValueError as msg: | ||
raise XenAPIPlugin.Failure("-1", [f"Wrong size: {msg}"]) | ||
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kc.add_rpc_params("lvol_name", lvol_name) | ||
kc.add_rpc_params("size", lvol_size) | ||
kc.add_rpc_params("lvs_name", lvs_name) | ||
return kc.call_rpc() | ||
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@error_wrapped | ||
def delete_lvol(_session, args): | ||
"""Delete the lvol passed as parameter on the Kalray DPU if exists.""" | ||
try: | ||
lvol_name = args["lvol_name"] | ||
raise XenAPIPlugin.Failure("-1", [f"Deletion of lvol {lvol_name} is not yet implemented"]) | ||
except KeyError as exc: | ||
raise XenAPIPlugin.Failure("-1", ["No argument found with key 'name'."]) from exc | ||
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if __name__ == "__main__": | ||
XenAPIPlugin.dispatch({ | ||
"get_devices": get_devices, | ||
"create_raid": create_raid, | ||
"get_raids": get_raids, | ||
"create_lvs": create_lvs, | ||
"get_lvs": get_lvs, | ||
"create_lvol": create_lvol, | ||
"delete_lvol": delete_lvol, | ||
}) |