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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# Copyright (c) 2017 Cisco and/or its affiliates.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
import asyncio
from netmodel.model.type import String
from vicn.core.attribute import Attribute, Multiplicity
from vicn.core.exception import ResourceNotFound
from vicn.core.requirement import Requirement
from vicn.core.task import BashTask, task, EmptyTask
from vicn.core.task import inherit_parent
from vicn.resource.linux.application import LinuxApplication
from vicn.resource.linux.file import TextFile
from vicn.resource.node import Node
from vicn.resource.vpp.scripts import FN_APPARMOR_DPDK_SCRIPT
from vicn.resource.vpp.scripts import TPL_APPARMOR_DPDK_SCRIPT
from vicn.resource.vpp.scripts import FN_VPP_DPDK_SCRIPT
from vicn.resource.vpp.scripts import TPL_VPP_DPDK_DAEMON_SCRIPT
from vicn.resource.vpp.vpp_commands import CMD_VPP_DISABLE
from vicn.resource.vpp.vpp_commands import CMD_VPP_STOP_SERVICE
CMD_INSERT_MODULES = 'modprobe uio && modprobe igb_uio'
CMD_APP_ARMOR_RELOAD = '''
# Force apparmor to reload profiles to include the new profile
/etc/init.d/apparmor reload
'''
CMD_SYSCTL_HUGEPAGES = 'sysctl -w vm.nr_hugepages={nb_hp}'
DEFAULT_NB_HUGEPAGES = 1024
CMD_GREP_UIO_DEV = 'ls /dev | grep uio'
CMD_CREATE_UIO_DEVICES = "dpdk-devbind --bind=igb_uio {pci_address}"
class VPPHost(LinuxApplication):
"""
Resource: VPPHost
Only used for container deployment
Packages required on the host
- vpp : sysctl configuration
- vpp-dpdk-dkms : kernel modules
Host must be configured to let vpp to work into container:
- install new apparmor profile (to let the container to read
hugepages info in /sys/kernel/mm/hugepages)
- set hugepages into the host
"""
node = Attribute(Node,
description = 'Node on which the application is installed',
mandatory = True,
multiplicity = Multiplicity.OneToOne,
reverse_name = 'vpp_host',
reverse_description = 'Setup for hosting vpp containers',
reverse_auto = True,
requirements = [Requirement('numa_mgr')])
uio_devices = Attribute(String,
description = 'uio devices on the node',
multiplicity = Multiplicity.OneToMany,
ro = True)
dpdk_devices = Attribute(String,
description = 'Dpdk devices on the node',
multiplicity = Multiplicity.OneToMany)
__package_names__ = ['vpp-dpdk-dkms', 'vpp-dpdk-dev']
#--------------------------------------------------------------------------
# Constructor and Accessors
#--------------------------------------------------------------------------
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.vppstart_lock = asyncio.Lock()
#--------------------------------------------------------------------------
# Resource lifecycle
#--------------------------------------------------------------------------
@inherit_parent
def __subresources__(self):
app_armor_file = TextFile(node = self.node,
filename = FN_APPARMOR_DPDK_SCRIPT,
content = TPL_APPARMOR_DPDK_SCRIPT,
overwrite = True)
return app_armor_file
@inherit_parent
@task
def __get__(self):
"""
This method always assumes the resource does not exist, since it is not
an issue to perform the modprobe call everytime.
"""
raise ResourceNotFound
@inherit_parent
def __create__(self):
modules = BashTask(self.node, CMD_INSERT_MODULES)
app_armor_reload = BashTask(self.node, CMD_APP_ARMOR_RELOAD)
sysctl_hugepages = BashTask(self.node, CMD_SYSCTL_HUGEPAGES,
{'nb_hp': DEFAULT_NB_HUGEPAGES})
create_uio = EmptyTask()
for device in self.dpdk_devices:
create_uio = create_uio > BashTask(self.node,
CMD_CREATE_UIO_DEVICES, {'pci_address' : device})
return ((modules | app_armor_reload) | sysctl_hugepages) > \
create_uio
#--------------------------------------------------------------------------
# Attributes
#--------------------------------------------------------------------------
def _get_uio_devices(self):
def parse(rv):
return rv.stdout.splitlines()
return BashTask(self.node, CMD_GREP_UIO_DEV, parse = parse)
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