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322 lines
12 KiB
Python
Executable File
322 lines
12 KiB
Python
Executable File
# -- 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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# -------------------------------------------------------------------- #
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# Notes
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# -------------------------------------------------------------------- #
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# Vrouter
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#
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# eth0 router gateway IP for isolated network
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# eth1 Control IP for hypervisor
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# eth2 public ip(s)
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#
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# VPC Router
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#
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# eth0 control interface
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# eth1 public ip
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# eth2+ Guest networks
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# -------------------------------------------------------------------- #
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import os
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import logging
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import CsHelper
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from CsFile import CsFile
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from CsProcess import CsProcess
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from CsApp import CsPasswdSvc
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from CsAddress import CsDevice
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import socket
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from time import sleep
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class CsRedundant(object):
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CS_RAMDISK_DIR = "/ramdisk"
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CS_PRIO_UP = 1
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CS_PRIO_DOWN = -1
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CS_ROUTER_DIR = "%s/rrouter" % CS_RAMDISK_DIR
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CS_TEMPLATES = [
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"heartbeat.sh.templ", "check_heartbeat.sh.templ",
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"arping_gateways.sh.templ"
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]
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CS_TEMPLATES_DIR = "/opt/cloud/templates"
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CONNTRACKD_BIN = "/usr/sbin/conntrackd"
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CONNTRACKD_KEEPALIVED_CONFLOCK = "/var/lock/conntrack.lock"
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CONNTRACKD_CONF = "/etc/conntrackd/conntrackd.conf"
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RROUTER_LOG = "/var/log/cloud.log"
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KEEPALIVED_CONF = "/etc/keepalived/keepalived.conf"
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def __init__(self, config):
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self.cl = config.cmdline()
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self.address = config.address()
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self.config = config
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def set(self):
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logging.debug("Router redundancy status is %s", self.cl.is_redundant())
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if self.cl.is_redundant():
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self._redundant_on()
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else:
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self._redundant_off()
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def _redundant_off(self):
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CsHelper.service("conntrackd", "stop")
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CsHelper.service("keepalived", "stop")
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CsHelper.umount_tmpfs(self.CS_RAMDISK_DIR)
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CsHelper.rmdir(self.CS_RAMDISK_DIR)
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CsHelper.rm(self.CONNTRACKD_CONF)
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CsHelper.rm(self.KEEPALIVED_CONF)
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def _redundant_on(self):
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guest = self.address.get_guest_if()
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# No redundancy if there is no guest network
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if self.cl.is_master() or guest is None:
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for obj in [o for o in self.address.get_ips() if o.is_public()]:
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self.check_is_up(obj.get_device())
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if guest is None:
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self._redundant_off()
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return
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CsHelper.mkdir(self.CS_RAMDISK_DIR, 0755, False)
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CsHelper.mount_tmpfs(self.CS_RAMDISK_DIR)
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CsHelper.mkdir(self.CS_ROUTER_DIR, 0755, False)
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for s in self.CS_TEMPLATES:
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d = s
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if s.endswith(".templ"):
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d = s.replace(".templ", "")
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CsHelper.copy_if_needed(
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"%s/%s" % (self.CS_TEMPLATES_DIR, s), "%s/%s" % (self.CS_ROUTER_DIR, d))
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CsHelper.copy(
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"%s/%s" % (self.CS_TEMPLATES_DIR, "keepalived.conf.templ"), self.KEEPALIVED_CONF)
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CsHelper.copy_if_needed(
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"%s/%s" % (self.CS_TEMPLATES_DIR, "conntrackd.conf.templ"), self.CONNTRACKD_CONF)
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CsHelper.copy_if_needed(
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"%s/%s" % (self.CS_TEMPLATES_DIR, "checkrouter.sh.templ"), "/opt/cloud/bin/checkrouter.sh")
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CsHelper.execute(
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'sed -i "s/--exec\ \$DAEMON;/--exec\ \$DAEMON\ --\ --vrrp;/g" /etc/init.d/keepalived')
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# checkrouter.sh configuration
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check_router = CsFile("/opt/cloud/bin/checkrouter.sh")
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check_router.greplace("[RROUTER_LOG]", self.RROUTER_LOG)
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check_router.commit()
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# keepalived configuration
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keepalived_conf = CsFile(self.KEEPALIVED_CONF)
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keepalived_conf.search(
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" router_id ", " router_id %s" % self.cl.get_name())
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keepalived_conf.search(
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" interface ", " interface %s" % guest.get_device())
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keepalived_conf.search(
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" virtual_router_id ", " virtual_router_id %s" % self.cl.get_router_id())
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keepalived_conf.greplace("[RROUTER_BIN_PATH]", self.CS_ROUTER_DIR)
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keepalived_conf.section("authentication {", "}", [
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" auth_type AH \n", " auth_pass %s\n" % self.cl.get_router_password()])
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keepalived_conf.section(
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"virtual_ipaddress {", "}", self._collect_ips())
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keepalived_conf.commit()
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# conntrackd configuration
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connt = CsFile(self.CONNTRACKD_CONF)
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if guest is not None:
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connt.section("Multicast {", "}", [
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"IPv4_address 225.0.0.50\n",
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"Group 3780\n",
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"IPv4_interface %s\n" % guest.get_ip(),
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"Interface %s\n" % guest.get_device(),
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"SndSocketBuffer 1249280\n",
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"RcvSocketBuffer 1249280\n",
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"Checksum on\n"])
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connt.section("Address Ignore {", "}", self._collect_ignore_ips())
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connt.commit()
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if connt.is_changed():
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CsHelper.service("conntrackd", "restart")
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# Configure heartbeat cron job - runs every 30 seconds
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heartbeat_cron = CsFile("/etc/cron.d/heartbeat")
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heartbeat_cron.add("SHELL=/bin/bash", 0)
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heartbeat_cron.add(
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"PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin", 1)
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heartbeat_cron.add(
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"* * * * * root $SHELL %s/check_heartbeat.sh 2>&1 > /dev/null" % self.CS_ROUTER_DIR, -1)
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heartbeat_cron.add(
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"* * * * * root sleep 30; $SHELL %s/check_heartbeat.sh 2>&1 > /dev/null" % self.CS_ROUTER_DIR, -1)
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heartbeat_cron.commit()
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# Configure KeepaliveD cron job - runs at every reboot
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keepalived_cron = CsFile("/etc/cron.d/keepalived")
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keepalived_cron.add("SHELL=/bin/bash", 0)
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keepalived_cron.add(
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"PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin", 1)
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keepalived_cron.add("@reboot root service keepalived start", -1)
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keepalived_cron.commit()
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# Configure ConntrackD cron job - runs at every reboot
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conntrackd_cron = CsFile("/etc/cron.d/conntrackd")
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conntrackd_cron.add("SHELL=/bin/bash", 0)
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conntrackd_cron.add(
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"PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin", 1)
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conntrackd_cron.add("@reboot root service conntrackd start", -1)
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conntrackd_cron.commit()
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proc = CsProcess(['/usr/sbin/keepalived', '--vrrp'])
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if not proc.find() or keepalived_conf.is_changed():
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CsHelper.service("keepalived", "restart")
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def release_lock(self):
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try:
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os.remove("/tmp/master_lock")
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except OSError:
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pass
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def set_lock(self):
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"""
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Make sure that master state changes happen sequentially
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"""
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iterations = 10
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time_between = 1
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for iter in range(0, iterations):
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try:
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s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
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s.bind('/tmp/master_lock')
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return s
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except socket.error, e:
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error_code = e.args[0]
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error_string = e.args[1]
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print "Process already running (%d:%s). Exiting" % (error_code, error_string)
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logging.info("Master is already running, waiting")
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sleep(time_between)
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def set_fault(self):
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""" Set fault mode on this router """
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if not self.cl.is_redundant():
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logging.error("Set fault called on non-redundant router")
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return
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self.set_lock()
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logging.info("Router switched to fault mode")
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ads = [o for o in self.address.get_ips() if o.is_public()]
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for o in ads:
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CsHelper.execute("ifconfig %s down" % o.get_device())
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cmd = "%s -C %s" % (self.CONNTRACKD_BIN, self.CONNTRACKD_CONF)
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CsHelper.execute("%s -s" % cmd)
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CsHelper.service("ipsec", "stop")
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CsHelper.service("xl2tpd", "stop")
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CsHelper.service("dnsmasq", "stop")
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ads = [o for o in self.address.get_ips() if o.needs_vrrp()]
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for o in ads:
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CsPasswdSvc(o.get_gateway()).stop()
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self.cl.set_fault_state()
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self.cl.save()
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self.release_lock()
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logging.info("Router switched to fault mode")
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def set_backup(self):
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""" Set the current router to backup """
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if not self.cl.is_redundant():
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logging.error("Set backup called on non-redundant router")
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return
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self.set_lock()
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logging.debug("Setting router to backup")
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ads = [o for o in self.address.get_ips() if o.is_public()]
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dev = ''
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for o in ads:
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if dev == o.get_device():
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continue
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logging.info("Bringing public interface %s down" % o.get_device())
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cmd2 = "ip link set %s up" % o.get_device()
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CsHelper.execute(cmd2)
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dev = o.get_device()
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cmd = "%s -C %s" % (self.CONNTRACKD_BIN, self.CONNTRACKD_CONF)
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CsHelper.execute("%s -d" % cmd)
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CsHelper.service("ipsec", "stop")
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CsHelper.service("xl2tpd", "stop")
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ads = [o for o in self.address.get_ips() if o.needs_vrrp()]
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for o in ads:
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CsPasswdSvc(o.get_gateway()).stop()
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CsHelper.service("dnsmasq", "stop")
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self.cl.set_master_state(False)
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self.cl.save()
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self.release_lock()
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logging.info("Router switched to backup mode")
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def set_master(self):
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""" Set the current router to master """
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if not self.cl.is_redundant():
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logging.error("Set master called on non-redundant router")
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return
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self.set_lock()
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logging.debug("Setting router to master")
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self.address.process()
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logging.info("added default rotue")
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# ip route add default via $gw table Table_$dev proto static
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cmd = "%s -C %s" % (self.CONNTRACKD_BIN, self.CONNTRACKD_CONF)
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CsHelper.execute("%s -c" % cmd)
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CsHelper.execute("%s -f" % cmd)
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CsHelper.execute("%s -R" % cmd)
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CsHelper.execute("%s -B" % cmd)
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CsHelper.service("ipsec", "restart")
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CsHelper.service("xl2tpd", "restart")
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ads = [o for o in self.address.get_ips() if o.needs_vrrp()]
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for o in ads:
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CsPasswdSvc(o.get_gateway()).restart()
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CsHelper.service("dnsmasq", "restart")
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self.cl.set_master_state(True)
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self.cl.save()
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self.release_lock()
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logging.info("Router switched to master mode")
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def _collect_ignore_ips(self):
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"""
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This returns a list of ip objects that should be ignored
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by conntrackd
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"""
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lines = []
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lines.append("\t\t\tIPv4_address %s\n" % "127.0.0.1")
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lines.append("\t\t\tIPv4_address %s\n" %
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self.address.get_control_if().get_ip())
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# FIXME - Do we need to also add any internal network gateways?
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return lines
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def _collect_ips(self):
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"""
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Construct a list containing all the ips that need to be looked afer by vrrp
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This is based upon the address_needs_vrrp method in CsAddress which looks at
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the network type and decides if it is an internal address or an external one
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In a DomR there will only ever be one address in a VPC there can be many
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The new code also gives the possibility to cloudstack to have a hybrid device
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thet could function as a router and VPC router at the same time
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"""
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lines = []
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for o in self.address.get_ips():
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if o.needs_vrrp():
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str = " %s brd %s dev %s\n" % (
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o.get_gateway_cidr(), o.get_broadcast(), o.get_device())
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lines.append(str)
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self.check_is_up(o.get_device())
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return lines
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def check_is_up(self, device):
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""" Ensure device is up """
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cmd = "ip link show %s | grep 'state DOWN'" % device
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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" % device
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CsHelper.execute(cmd2)
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