mirror of
https://github.com/apache/cloudstack.git
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8a2391336c
Some refactoring to make class loading a little more logical Removed fw global (does not persist accross modules) Added first tests Added command line call to set and disable redundancy Added command line call to set master
398 lines
14 KiB
Python
398 lines
14 KiB
Python
# -- coding: utf-8 --
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# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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from CsDatabag import CsDataBag, CsCmdLine
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from CsApp import CsApache, CsDnsmasq, CsPasswdSvc
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import CsHelper
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import logging
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import CsHelper
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import subprocess
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from CsRoute import CsRoute
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from CsRule import CsRule
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class CsAddress(CsDataBag):
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def compare(self):
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for dev in CsDevice('', self.fw).list():
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ip = CsIP(dev, self.fw)
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ip.compare(self.dbag)
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def get_ips(self):
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ret = []
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for dev in self.dbag:
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if dev == "id":
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continue
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for ip in self.dbag[dev]:
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ret.append(CsInterface(ip))
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return ret
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def needs_vrrp(self,o):
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"""
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Returns if the ip needs to be managed by keepalived or not
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"""
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if "nw_type" in o and o['nw_type'] in [ 'guest' ]:
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return True
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return False
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def get_control_if(self):
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"""
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Return the address object that has the control interface
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"""
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for ip in self.get_ips():
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if ip.is_control():
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return ip
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return None
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def process(self):
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for dev in self.dbag:
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if dev == "id":
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continue
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ip = CsIP(dev, self.fw)
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addcnt = 0
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for address in self.dbag[dev]:
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if not address["nw_type"] == "control":
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CsRoute(dev).add(address)
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ip.setAddress(address)
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if ip.configured():
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logging.info("Address %s on device %s already configured", ip.ip(), dev)
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ip.post_configure()
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else:
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logging.info("Address %s on device %s not configured", ip.ip(), dev)
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if CsDevice(dev, self.fw).waitfordevice():
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ip.configure()
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# This could go one level up but the ip type is stored in the
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# ip address object and not in the device object
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# Call only once
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if addcnt == 0:
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self.add_netstats(address)
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addcnt += 1
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def add_netstats(self, address):
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# add in the network stats iptables rules
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dev = "eth%s" % address['nic_dev_id']
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if address["nw_type"] == "public_ip":
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self.fw.append(["", "front", "-A FORWARD -j NETWORK_STATS"])
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self.fw.append(["", "front", "-A INPUT -j NETWORK_STATS"])
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self.fw.append(["", "front", "-A OUTPUT -j NETWORK_STATS"])
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# it is not possible to calculate these devices
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# When the vrouter and the vpc router are combined this silliness can go
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self.fw.append(["", "", "-A NETWORK_STATS -i %s -o eth0 -p tcp" % dev])
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self.fw.append(["", "", "-A NETWORK_STATS -o %s -i eth0 -p tcp" % dev])
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self.fw.append(["", "", "-A NETWORK_STATS -o %s ! -i eth0 -p tcp" % dev])
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self.fw.append(["", "", "-A NETWORK_STATS -i %s ! -o eth0 -p tcp" % dev])
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if address["nw_type"] == "guest":
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self.fw.append(["", "front", "-A FORWARD -j NETWORK_STATS_%s" % dev])
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self.fw.append(["", "front", "-A NETWORK_STATS_%s -o %s -s %s" % (dev, dev, address['network'])])
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self.fw.append(["", "front", "-A NETWORK_STATS_%s -o %s -d %s" % (dev, dev, address['network'])])
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# Only relevant if there is a VPN configured so will have to move
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# at some stage
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self.fw.append(["mangle", "", "-A FORWARD -j VPN_STATS_%s" % dev])
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self.fw.append(["mangle", "", "-A VPN_STATS_%s -o %s -m mark --set-xmark 0x525/0xffffffff" % (dev, dev)])
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self.fw.append(["mangle", "", "-A VPN_STATS_%s -i %s -m mark --set-xmark 0x524/0xffffffff" % (dev, dev)])
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class CsInterface:
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""" Hold one single ip """
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def __init__(self, o):
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self.address = o
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def get_ip(self):
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return self.get_attr("public_ip")
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def get_device(self):
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return self.get_attr("device")
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def get_cidr(self):
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return self.get_attr("cidr")
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def get_broadcast(self):
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return self.get_attr("broadcast")
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def get_attr(self, attr):
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if attr in self.address:
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return self.address[attr]
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else:
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return "ERROR"
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def needs_vrrp(self):
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"""
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Returns if the ip needs to be managed by keepalived or not
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"""
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if "nw_type" in self.address and self.address['nw_type'] in [ 'guest' ]:
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return True
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return False
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def is_control(self):
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if "nw_type" in self.address and self.address['nw_type'] in [ 'control' ]:
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return True
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return False
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def to_str(self):
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pprint(self.address)
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class CsDevice:
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""" Configure Network Devices """
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def __init__(self, dev, fw):
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self.devlist = []
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self.dev = dev
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self.buildlist()
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self.table = ''
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self.tableNo = ''
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if dev != '':
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self.tableNo = dev[3]
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self.table = "Table_%s" % dev
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self.fw = fw
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def configure_rp(self):
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"""
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Configure Reverse Path Filtering
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"""
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filename = "/proc/sys/net/ipv4/conf/%s/rp_filter" % self.dev
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CsHelper.updatefile(filename, "1\n", "w")
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def buildlist(self):
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"""
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List all available network devices on the system
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"""
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self.devlist = []
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for line in open('/proc/net/dev'):
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vals = line.lstrip().split(':')
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if (not vals[0].startswith("eth")):
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continue
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self.devlist.append(vals[0])
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def waitfordevice(self):
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""" Wait up to 15 seconds for a device to become available """
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count = 0
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while count < 15:
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if self.dev in self.devlist:
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return True
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time.sleep(1)
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count += 1
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self.buildlist();
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logging.error("Device %s cannot be configured - device was not found", self.dev)
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return False
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def list(self):
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return self.devlist
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def setUp(self):
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""" Ensure device is up """
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cmd = "ip link show %s | grep 'state DOWN'" % self.dev
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for i in CsHelper.execute(cmd):
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if " DOWN " in i:
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cmd2 = "ip link set %s up" % self.dev
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CsHelper.execute(cmd2)
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cmd = "-A PREROUTING -i %s -m state --state NEW -j CONNMARK --set-xmark 0x%s/0xffffffff" % \
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(self.dev, self.dev[3])
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self.fw.append(["mangle", "", cmd])
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class CsIP:
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def __init__(self, dev, fw):
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self.dev = dev
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self.iplist = {}
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self.address = {}
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self.list()
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self.fw = fw
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def setAddress(self, address):
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self.address = address
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def getAddress(self):
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return self.address
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def configure(self):
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logging.info("Configuring address %s on device %s", self.ip(), self.dev)
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cmd = "ip addr add dev %s %s brd +" % (self.dev, self.ip())
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subprocess.call(cmd, shell=True)
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self.post_configure()
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def post_configure(self):
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""" The steps that must be done after a device is configured """
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if not self.get_type() in [ "control" ]:
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route = CsRoute(self.dev)
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route.routeTable()
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CsRule(self.dev).addMark()
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CsDevice(self.dev, self.fw).setUp()
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self.arpPing()
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CsRpsrfs(self.dev).enable()
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self.post_config_change("add")
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def get_type(self):
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""" Return the type of the IP
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guest
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control
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public
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"""
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if "nw_type" in self.address:
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return self.address['nw_type']
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return "unknown"
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def get_ip_address(self):
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"""
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Return ip address if known
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"""
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if "public_ip" in self.address:
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return self.address['public_ip']
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return "unknown"
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def post_config_change(self, method):
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route = CsRoute(self.dev)
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route.routeTable()
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route.add(self.address, method)
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# On deletion nw_type will no longer be known
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if self.get_type() in [ "guest" ]:
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devChain = "ACL_INBOUND_%s" % (self.dev)
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CsDevice(self.dev, self.fw).configure_rp()
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self.fw.append(["nat", "front",
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"-A POSTROUTING -s %s -o %s -j SNAT --to-source %s" % \
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(self.address['network'], self.dev, self.address['public_ip'])
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])
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self.fw.append(["mangle", "front", "-A %s -j ACCEPT" % devChain])
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self.fw.append(["", "front",
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"-A FORWARD -o %s -d %s -j %s" % (self.dev, self.address['network'], devChain)
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])
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self.fw.append(["", "", "-A %s -j DROP" % devChain])
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self.fw.append(["mangle", "",
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"-A PREROUTING -m state --state NEW -i %s -s %s ! -d %s/32 -j %s" % \
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(self.dev, self.address['network'], self.address['public_ip'], devChain)
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])
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dns = CsDnsmasq(self)
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dns.add_firewall_rules()
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app = CsApache(self)
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app.setup()
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pwdsvc = CsPasswdSvc(self).setup()
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elif self.get_type() == "public":
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if self.address["source_nat"] == True:
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cmdline = CsDataBag("cmdline", self.fw)
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dbag = cmdline.get_bag()
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type = dbag["config"]["type"]
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if type == "vpcrouter":
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vpccidr = dbag["config"]["vpccidr"]
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self.fw.append(["filter", "", "-A FORWARD -s %s ! -d %s -j ACCEPT" % (vpccidr, vpccidr)])
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self.fw.append(["nat","","-A POSTROUTING -j SNAT -o %s --to-source %s" % (self.dev, self.address['public_ip'])])
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elif type == "router":
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logging.error("Not able to setup sourcenat for a regular router yet")
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else:
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logging.error("Unable to process source nat configuration for router of type %s" % type)
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route.flush()
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def list(self):
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self.iplist = {}
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cmd = ("ip addr show dev " + self.dev)
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for i in CsHelper.execute(cmd):
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vals = i.lstrip().split()
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if (vals[0] == 'inet'):
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self.iplist[vals[1]] = self.dev
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def configured(self):
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if self.address['cidr'] in self.iplist.keys():
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return True
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return False
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def ip(self):
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return str(self.address['cidr'])
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def getDevice(self):
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return self.dev
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def hasIP(self, ip):
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return ip in self.address.values()
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def arpPing(self):
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cmd = "arping -c 1 -I %s -A -U -s %s %s" % (self.dev, self.address['public_ip'], self.address['public_ip'])
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CsHelper.execute(cmd)
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# Delete any ips that are configured but not in the bag
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def compare(self, bag):
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if len(self.iplist) > 0 and (not self.dev in bag.keys() or len(bag[self.dev]) == 0):
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# Remove all IPs on this device
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logging.info("Will remove all configured addresses on device %s", self.dev)
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self.delete("all")
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app = CsApache(self)
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app.remove()
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# This condition should not really happen but did :)
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# It means an apache file got orphaned after a guest network address was deleted
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if len(self.iplist) == 0 and (not self.dev in bag.keys() or len(bag[self.dev]) == 0):
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app = CsApache(self)
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app.remove()
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for ip in self.iplist:
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found = False
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if self.dev in bag.keys():
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for address in bag[self.dev]:
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self.setAddress(address)
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if self.hasIP(ip):
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found = True
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if not found:
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self.delete(ip)
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def delete(self, ip):
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remove = []
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if ip == "all":
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logging.info("Removing addresses from device %s", self.dev)
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remove = self.iplist.keys()
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else:
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remove.append(ip)
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for ip in remove:
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cmd = "ip addr del dev %s %s" % (self.dev, ip)
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subprocess.call(cmd, shell=True)
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logging.info("Removed address %s from device %s", ip, self.dev)
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self.post_config_change("delete")
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class CsRpsrfs:
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""" Configure rpsrfs if there is more than one cpu """
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def __init__(self, dev):
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self.dev = dev
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def enable(self):
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if not self.inKernel(): return
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cpus = self.cpus()
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if cpus < 2: return
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val = format((1 << cpus) - 1, "x")
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filename = "/sys/class/net/%s/queues/rx-0/rps_cpus" % (self.dev)
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CsHelper.updatefile(filename, val, "w+")
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CsHelper.updatefile("/proc/sys/net/core/rps_sock_flow_entries", "256", "w+")
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filename = "/sys/class/net/%s/queues/rx-0/rps_flow_cnt" % (self.dev)
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CsHelper.updatefile(filename, "256", "w+")
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logging.debug("rpsfr is configured for %s cpus" % (cpus))
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def inKernel(self):
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try:
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open('/etc/rpsrfsenable')
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except IOError:
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logging.debug("rpsfr is not present in the kernel")
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return False
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else:
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logging.debug("rpsfr is present in the kernel")
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return True
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def cpus(self):
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count = 0
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for line in open('/proc/cpuinfo'):
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if "processor" not in line: continue
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count += 1
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if count < 2: logging.debug("Single CPU machine")
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return count
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