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# Copyright (c) 2019 Intel 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.
"""Loadbalancer util library."""
from ipaddress import ip_address
from socket import htonl
from resources.libraries.python.topology import NodeType, Topology
from resources.libraries.python.PapiExecutor import PapiSocketExecutor
class LoadBalancerUtil:
"""Basic Loadbalancer parameter configuration."""
@staticmethod
def vpp_lb_conf(node, **kwargs):
"""Config global parameters for loadbalancer.
:param node: Node where the interface is.
:param kwargs: Optional key-value arguments:
ip4_src_addr: IPv4 address to be used as source for IPv4 traffic.
(str)
ip6_src_addr: IPv6 address to be used as source for IPv6 traffic.
(str)
flow_timeout: Time in seconds after which, if no packet is received
for a given flow, the flow is removed from the
established flow table. (int)
buckets_per_core: Number of buckets *per worker thread* in the
established flow table (int)
:type node: dict
:type kwargs: dict
:returns: Nothing.
:raises ValueError: If the node has an unknown node type.
"""
if node[u"type"] == NodeType.DUT:
ip4_src_addr = ip_address(
kwargs.pop(u"ip4_src_addr", u"255.255.255.255")
)
ip6_src_addr = ip_address(
kwargs.pop(
u"ip6_src_addr", u"ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"
)
)
flow_timeout = kwargs.pop(u"flow_timeout", 40)
sticky_buckets_per_core = kwargs.pop(u"buckets_per_core", 1024)
cmd = u"lb_conf"
err_msg = f"Failed to set lb conf on host {node[u'host']}"
args = dict(
ip4_src_address=str(ip4_src_addr),
ip6_src_address=str(ip6_src_addr),
sticky_buckets_per_core=sticky_buckets_per_core,
flow_timeout=flow_timeout
)
with PapiSocketExecutor(node) as papi_exec:
papi_exec.add(cmd, **args).get_reply(err_msg)
else:
raise ValueError(
f"Node {node[u'host']} has unknown NodeType: '{node[u'type']}'"
)
@staticmethod
def vpp_lb_add_del_vip(node, **kwargs):
"""Config vip for loadbalancer.
:param node: Node where the interface is.
:param kwargs: Optional key-value arguments:
vip_addr: IPv4 address to be used as source for IPv4 traffic. (str)
protocol: tcp or udp. (int)
port: destination port. (int)
encap: encap is ip4 GRE(0) or ip6 (1GRE) or L3DSR(2) or NAT4(3) or
NAT6(4). (int)
dscp: dscp bit corresponding to VIP
type: service type
target_port: Pod's port corresponding to specific service
node_port: Node's port
new_len: Size of the new connections flow table used
for this VIP
is_del: 1 if the VIP should be removed otherwise 0.
:type node: dict
:type kwargs: dict
:returns: Nothing.
:raises ValueError: If the node has an unknown node type.
"""
if node[u"type"] == NodeType.DUT:
vip_addr = kwargs.pop(u"vip_addr", "0.0.0.0")
protocol = kwargs.pop(u"protocol", 255)
port = kwargs.pop(u"port", 0)
encap = kwargs.pop(u"encap", 0)
dscp = kwargs.pop(u"dscp", 0)
srv_type = kwargs.pop(u"srv_type", 0)
target_port = kwargs.pop(u"target_port", 0)
node_port = kwargs.pop(u"node_port", 0)
new_len = kwargs.pop(u"new_len", 1024)
is_del = kwargs.pop(u"is_del", 0)
cmd = u"lb_add_del_vip"
err_msg = f"Failed to add vip on host {node[u'host']}"
vip_addr = ip_address(vip_addr).packed
args = dict(
pfx={
u"len": 128,
u"address": {u"un": {u"ip": vip_addr}, u"af": 0}
},
protocol=protocol,
port=port,
encap=htonl(encap),
dscp=dscp,
type=srv_type,
target_port=target_port,
node_port=node_port,
new_flows_table_length=int(new_len),
is_del=is_del
)
with PapiSocketExecutor(node) as papi_exec:
papi_exec.add(cmd, **args).get_reply(err_msg)
else:
raise ValueError(
f"Node {node[u'host']} has unknown NodeType: '{node[u'type']}'"
)
@staticmethod
def vpp_lb_add_del_as(node, **kwargs):
"""Config AS for Loadbalancer.
:param node: Node where the interface is.
:param kwargs: Optional key-value arguments:
vip_addr: IPv4 address to be used as source for IPv4 traffic. (str)
protocol: tcp or udp. (int)
port: destination port. (int)
as_addr: The application server address. (str)
is_del: 1 if the VIP should be removed otherwise 0. (int)
is_flush: 1 if the sessions related to this AS should be flushed
otherwise 0. (int)
:type node: dict
:type kwargs: dict
:returns: Nothing.
:raises ValueError: If the node has an unknown node type.
"""
if node[u"type"] == NodeType.DUT:
cmd = u"lb_add_del_as"
err_msg = f"Failed to add lb as on host {node[u'host']}"
vip_addr = kwargs.pop(u"vip_addr", "0.0.0.0")
protocol = kwargs.pop(u"protocol", 255)
port = kwargs.pop(u"port", 0)
as_addr = kwargs.pop(u"as_addr", u"0.0.0.0")
is_del = kwargs.pop(u"is_del", 0)
is_flush = kwargs.pop(u"is_flush", 0)
vip_addr = ip_address(vip_addr).packed
as_addr = ip_address(as_addr).packed
args = dict(
pfx={
u"len": 128,
u"address": {u"un": {u"ip": vip_addr}, u"af": 0}
},
protocol=protocol,
port=port,
as_address={u"un": {u"ip": as_addr}, u"af": 0},
is_del=is_del,
is_flush=is_flush
)
with PapiSocketExecutor(node) as papi_exec:
papi_exec.add(cmd, **args).get_reply(err_msg)
else:
raise ValueError(
f"Node {node[u'host']} has unknown NodeType: '{node[u'type']}'"
)
@staticmethod
def vpp_lb_add_del_intf_nat4(node, **kwargs):
"""Enable/disable NAT4 feature on the interface.
:param node: Node where the interface is.
:param kwargs: Optional key-value arguments:
is_add: true if add, false if delete. (bool)
interface: software index of the interface. (int)
:type node: dict
:type kwargs: dict
:returns: Nothing.
:raises ValueError: If the node has an unknown node type.
"""
if node[u"type"] == NodeType.DUT:
cmd = u"lb_add_del_intf_nat4"
err_msg = f"Failed to add interface nat4 on host {node[u'host']}"
is_add = kwargs.pop(u"is_add", True)
interface = kwargs.pop(u"interface", 0)
sw_if_index = Topology.get_interface_sw_index(node, interface)
args = dict(
is_add=is_add,
sw_if_index=sw_if_index
)
with PapiSocketExecutor(node) as papi_exec:
papi_exec.add(cmd, **args).get_reply(err_msg)
else:
raise ValueError(
f"Node {node[u'host']} has unknown NodeType: '{node[u'type']}'"
)
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