Shulou(Shulou.com)06/01 Report--

Installation:

Tar-zxvf keepalived-1.2.2.tar.gz

Yum list all | grep "ipvsadm"

Yum-y install kernel-devel openssl-develpopt-devel ipvsadm libnl libnl-devel

Service iptables stop

Setenforce 0

. / configure-- prefix=/--with-kernel-dir=/usr/src/kernels/2.6.32-431.el6.x86_64 & & make&& make install

Add system services:

Chkconfig-after add keepalived is added, you can use service and chkconfig tools to manage keepalived services

Chkconfig keepalived on on levels are 2, 3, 4

Chkconfig-- list keepalived to see if levels 2, 3 and 4 are enabled

Global profile:

Global_defs {

Notification_email {

Acassen@firewall.loc

Failover@firewall.loc

Sysadmin@firewall.loc

}

Notification_email_from Alexandre.Cassen@firewall.loc

Smtp_server 192.168.1.1

Smtp_connect_timeout 30

Router_id LVS_master

}

Vrrp_script check_httpd {

# vrrp_script module is specially used to monitor the service resources in the cluster (HA cluster monitoring). This module is also used with the track_script module, and the track_script module is mainly used to call the vrrp_script module. You can also check ports, shell statements, and scripts. Demonstrate below the appendix

Script "killall-O httpd"

# use killall-O httpd to check the returned status of httpd service. Zero indicates normal operation, while 1 indicates abnormal operation.

Interval 2

# the interval between checks (in seconds).

}

Example of Vrrp configuration (keepalived High availability configuration):

Vrrp_instance VI_1 {

# identity, the identity of the start of the vrrp instance

State MASTER

# define master and slave roles master and backup

Interface eth0

# specify listening Nic

Virtual_router_id51

# Virtual routing identity, which cannot be the same as master / slave.

Priority 100

# priority. The higher the number, the higher the priority. Under the same vrrp-instance, master must have higher priority than backup.

Advert_int 1

# set the time interval for synchronization checks between master and backup (in seconds)

Authentication {

Auth_type PASS

Auth_pass 1111

# set master and backup authentication types (AH, PASS) and password so that the master / slave passwords are the same before you can communicate.

}

Notify_master "/ etc/keep/master.sh"

Notify_backup "/ etc/keep/backup.sh"

Notify_fault "/ etc/keep/fault.sh"

# specifies that the script is executed when keepalived enters the state of master, backup, and fault. Examples of the script are shown in the appendix.

Track_script {

Check_httpd

}

# call the vrrp_script module. Check_httpd is the name followed by the vrrp_script module.

Virtual_ipaddress {

192.168.1.250

# Virtual address, you can set multiple addresses. It adds the address in the form of ip address add.

}

# nopreempt

# No preemption feature, this feature can only be used on nodes whose state status is backup, and this node has higher priority than other nodes

# preempt_delay 300

# preemption delay time in seconds. For example, if there is a jitter in the network, the master node sends the detection packet to the backup node in a timely manner. There is no problem with the actual master node, and there is no need for active / standby switching. The same is true of restarting the service or restarting the system.

}

-vrrp configuration Appendix-

-- vrrp configuration appendix

An example of the notify_master "/ etc/keep/master.sh" script is as follows:

#! / bin/bash

Logfile=/var/log/keep/keep-http-statsu.log

Echo "[MASTER]" > > $logfile

Date > > $logfile

Backup.sh and fault.sh skip.

Port check:

Vrrp_script check_httpd {

Script "

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