global_defs {
router_id r-17-VM
}
vrrp_script heartbeat {
script "/ramdisk/rrouter/heartbeat.sh"
interval 5
}
vrrp_instance inside_network {
state BACKUP
interface eth0
virtual_router_id 51
nopreempt
advert_int 1
authentication {
auth_type PASS
auth_pass 9YasrrhZ
}
virtual_ipaddress {
10.1.1.1 brd 10.1.1.255 dev eth0
}
track_script {
heartbeat
}
!That's the correct path of the master.py file.
notify_backup "/opt/cloud/bin/master.py --backup"
notify_master "/opt/cloud/bin/master.py --master"
notify_fault "/opt/cloud/bin/master.py --fault"
}root@r-17-VM:~#
conntrackd.conf:
Sync {
Mode FTFW {
#
# Size of the resend queue (in objects). This is the maximum
# number of objects that can be stored waiting to be confirmed
# via acknoledgment. If you keep this value low, the daemon
# will have less chances to recover state-changes under message
# omission. On the other hand, if you keep this value high,
# the daemon will consume more memory to store dead objects.
# Default is 131072 objects.
#
# ResendQueueSize 131072
#
# This parameter allows you to set an initial fixed timeout
# for the committed entries when this node goes from backup
# to primary. This mechanism provides a way to purge entries
# that were not recovered appropriately after the specified
# fixed timeout. If you set a low value, TCP entries in
# Established states with no traffic may hang. For example,
# an SSH connection without KeepAlive enabled. If not set,
# the daemon uses an approximate timeout value calculation
# mechanism. By default, this option is not set.
#
# CommitTimeout 180
#
# If the firewall replica goes from primary to backup,
# the conntrackd -t command is invoked in the script.
# This command schedules a flush of the table in N seconds.
# This is useful to purge the connection tracking table of
# zombie entries and avoid clashes with old entries if you
# trigger several consecutive hand-overs. Default is 60 seconds.
#
# PurgeTimeout 60
# Set the acknowledgement window size. If you decrease this
# value, the number of acknowlegdments increases. More
# acknowledgments means more overhead as conntrackd has to
# handle more control messages. On the other hand, if you
# increase this value, the resend queue gets more populated.
# This results in more overhead in the queue releasing.
# The following value is based on some practical experiments
# measuring the cycles spent by the acknowledgment handling
# with oprofile. If not set, default window size is 300.
#
# ACKWindowSize 300
#
# This clause allows you to disable the external cache. Thus,
# the state entries are directly injected into the kernel
# conntrack table. As a result, you save memory in user-space
# but you consume slots in the kernel conntrack table for
# backup state entries. Moreover, disabling the external cache
# means more CPU consumption. You need a Linux kernel
# >= 2.6.29 to use this feature. By default, this clause is
# set off. If you are installing conntrackd for first time,
# please read the user manual and I encourage you to consider
# using the fail-over scripts instead of enabling this option!
#
# DisableExternalCache Off
}
#
# Multicast IP and interface where messages are
# broadcasted (dedicated link). IMPORTANT: Make sure
# that iptables accepts traffic for destination
# 225.0.0.50, eg:
#
# iptables -I INPUT -d 225.0.0.50 -j ACCEPT
# iptables -I OUTPUT -d 225.0.0.50 -j ACCEPT
#
Multicast {
IPv4_address 225.0.0.50
Group 3780
IPv4_interface 10.1.1.197
Interface eth0
SndSocketBuffer 1249280
RcvSocketBuffer 1249280
Checksum on
}
#
# You can specify more than one dedicated link. Thus, if one dedicated
# link fails, conntrackd can fail-over to another. Note that adding
# more than one dedicated link does not mean that state-updates will
# be sent to all of them. There is only one active dedicated link at
# a given moment. The `Default' keyword indicates that this interface
# will be selected as the initial dedicated link. You can have
# up to 4 redundant dedicated links. Note: Use different multicast
# groups for every redundant link.
#
# Multicast Default {
# IPv4_address 225.0.0.51
# Group 3781
# IPv4_interface 192.168.100.101
# Interface eth3
# # SndSocketBuffer 1249280
# # RcvSocketBuffer 1249280
# Checksum on
# }
#
# You can use Unicast UDP instead of Multicast to propagate events.
# Note that you cannot use unicast UDP and Multicast at the same
# time, you can only select one.
#
# UDP {
#
# UDP address that this firewall uses to listen to events.
#
# IPv4_address 192.168.2.100
#
# or you may want to use an IPv6 address:
#
# IPv6_address fe80::215:58ff:fe28:5a27
#
# Destination UDP address that receives events, ie. the other
# firewall's dedicated link address.
#
# IPv4_Destination_Address 192.168.2.101
#
# or you may want to use an IPv6 address:
#
# IPv6_Destination_Address fe80::2d0:59ff:fe2a:775c
#
# UDP port used
#
# Port 3780
#
# The name of the interface that you are going to use to
# send the synchronization messages.
#
# Interface eth2
#
# The sender socket buffer size
#
# SndSocketBuffer 1249280
#
# The receiver socket buffer size
#
# RcvSocketBuffer 1249280
#
# Enable/Disable message checksumming.
#
# Checksum on
# }
}
#
# General settings
#
General {
#
# Set the nice value of the daemon, this value goes from -20
# (most favorable scheduling) to 19 (least favorable). Using a
# very low value reduces the chances to lose state-change events.
# Default is 0 but this example file sets it to most favourable
# scheduling as this is generally a good idea. See man nice(1) for
# more information.
#
Nice -20
#
# Select a different scheduler for the daemon, you can select between
# RR and FIFO and the process priority (minimum is 0, maximum is 99).
# See man sched_setscheduler(2) for more information. Using a RT
# scheduler reduces the chances to overrun the Netlink buffer.
#
# Scheduler {
# Type FIFO
# Priority 99
# }
#
# Number of buckets in the cache hashtable. The bigger it is,
# the closer it gets to O(1) at the cost of consuming more memory.
# Read some documents about tuning hashtables for further reference.
#
HashSize 32768
#
# Maximum number of conntracks, it should be double of:
# $ cat /proc/sys/net/netfilter/nf_conntrack_max
# since the daemon may keep some dead entries cached for possible
# retransmission during state synchronization.
#
HashLimit 131072
#
# Logfile: on (/var/log/conntrackd.log), off, or a filename
# Default: off
#
LogFile on
#
# Syslog: on, off or a facility name (daemon (default) or local0..7)
# Default: off
#
#Syslog on
#
# Lockfile
#
LockFile /var/lock/conntrack.lock
#
# Unix socket configuration
#
UNIX {
Path /var/run/conntrackd.ctl
Backlog 20
}
#
# Netlink event socket buffer size. If you do not specify this clause,
# the default buffer size value in /proc/net/core/rmem_default is
# used. This default value is usually around 100 Kbytes which is
# fairly small for busy firewalls. This leads to event message dropping
# and high CPU consumption. This example configuration file sets the
# size to 2 MBytes to avoid this sort of problems.
#
NetlinkBufferSize 2097152
#
# The daemon doubles the size of the netlink event socket buffer size
# if it detects netlink event message dropping. This clause sets the
# maximum buffer size growth that can be reached. This example file
# sets the size to 8 MBytes.
#
NetlinkBufferSizeMaxGrowth 8388608
#
# If the daemon detects that Netlink is dropping state-change events,
# it automatically schedules a resynchronization against the Kernel
# after 30 seconds (default value). Resynchronizations are expensive
# in terms of CPU consumption since the daemon has to get the full
# kernel state-table and purge state-entries that do not exist anymore.
# Be careful of setting a very small value here. You have the following
# choices: On (enabled, use default 30 seconds value), Off (disabled)
# or Value (in seconds, to set a specific amount of time). If not
# specified, the daemon assumes that this option is enabled.
#
# NetlinkOverrunResync On
#
# If you want reliable event reporting over Netlink, set on this
# option. If you set on this clause, it is a good idea to set off
# NetlinkOverrunResync. This option is off by default and you need
# a Linux kernel >= 2.6.31.
#
# NetlinkEventsReliable Off
#
# By default, the daemon receives state updates following an
# event-driven model. You can modify this behaviour by switching to
# polling mode with the PollSecs clause. This clause tells conntrackd
# to dump the states in the kernel every N seconds. With regards to
# synchronization mode, the polling mode can only guarantee that
# long-lifetime states are recovered. The main advantage of this method
# is the reduction in the state replication at the cost of reducing the
# chances of recovering connections.
#
# PollSecs 15
#
# The daemon prioritizes the handling of state-change events coming
# from the core. With this clause, you can set the maximum number of
# state-change events (those coming from kernel-space) that the daemon
# will handle after which it will handle other events coming from the
# network or userspace. A low value improves interactivity (in terms of
# real-time behaviour) at the cost of extra CPU consumption.
# Default (if not set) is 100.
#
# EventIterationLimit 100
#
# Event filtering: This clause allows you to filter certain traffic,
# There are currently three filter-sets: Protocol, Address and
# State. The filter is attached to an action that can be: Accept or
# Ignore. Thus, you can define the event filtering policy of the
# filter-sets in positive or negative logic depending on your needs.
# You can select if conntrackd filters the event messages from
# user-space or kernel-space. The kernel-space event filtering
# saves some CPU cycles by avoiding the copy of the event message
# from kernel-space to user-space. The kernel-space event filtering
# is prefered, however, you require a Linux kernel >= 2.6.29 to
# filter from kernel-space. If you want to select kernel-space
# event filtering, use the keyword 'Kernelspace' instead of
# 'Userspace'.
#
Filter From Userspace {
#
# Accept only certain protocols: You may want to replicate
# the state of flows depending on their layer 4 protocol.
#
Protocol Accept {
TCP
SCTP
DCCP
# UDP
# ICMP # This requires a Linux kernel >= 2.6.31
}
#
# Ignore traffic for a certain set of IP's: Usually all the
# IP assigned to the firewall since local traffic must be
# ignored, only forwarded connections are worth to replicate.
# Note that these values depends on the local IPs that are
# assigned to the firewall.
#
Address Ignore {
IPv4_address 127.0.0.1
IPv4_address 169.254.0.4
}
#
# Uncomment this line below if you want to filter by flow state.
# This option introduces a trade-off in the replication: it
# reduces CPU consumption at the cost of having lazy backup
# firewall replicas. The existing TCP states are: SYN_SENT,
# SYN_RECV, ESTABLISHED, FIN_WAIT, CLOSE_WAIT, LAST_ACK,
# TIME_WAIT, CLOSED, LISTEN.
#
# State Accept {
# ESTABLISHED CLOSED TIME_WAIT CLOSE_WAIT for TCP
# }
}
}
root@r-17-VM:~# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 02:00:63:d3:00:05 brd ff:ff:ff:ff:ff:ff
inet 10.1.1.197/24 brd 10.1.1.255 scope global eth0
valid_lft forever preferred_lft forever
inet 10.1.1.1/32 brd 10.1.1.255 scope global eth0
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 0e:00:a9:fe:00:04 brd ff:ff:ff:ff:ff:ff
inet 169.254.0.4/16 brd 169.254.255.255 scope global eth1
valid_lft forever preferred_lft forever
4: eth2: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
link/ether 1e:00:3d:00:00:10 brd ff:ff:ff:ff:ff:ff
inet 10.147.48.42/24 brd 10.147.48.255 scope global eth2
valid_lft forever preferred_lft forever
inet 10.147.48.45/24 brd 10.147.48.255 scope global secondary eth2
valid_lft forever preferred_lft forever
root@r-17-VM:~#
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