Keepalived + haproxy + nginx

Keepalived + haproxy + nginx

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Vm1-keepalived + haproxy
Eth0 172.16.3.2/16 up
Eth1 192.168.1.2/24 up
Vm2-keepalived + haproxy
Eth0 172.16.3.3/16 up
Eth1 192.168.1.3/24 up
Vm3-web:
Eth0 192.168.1.1/24 up
Vm4-web:
Ech0 192.168.1.10/24 up
Vrrp: 172.16.3.88/16

Test Machine:

Vm1-keepalived + haproxy Configuration
# Ifconfig eth0 172.16.3.2/16 up
# Ifconfig eth1 192.168.1.2/24 up
# Yum install keepalived haproxy-y
Haproxy configuration file:
# Vim/etc/haproxy. cfg
#---------------------------------------------------------------------
# Example configuration for a possible web application. See
# Full configuration options online.
#
# Http://haproxy.1wt.eu/download/1.4/doc/configuration.txt
#
#---------------------------------------------------------------------

#---------------------------------------------------------------------
# Global settings
#---------------------------------------------------------------------
Global
# To have these messages end up in/var/log/haproxy. log you will
# Need:
#
#1) Configure syslog To accept network log events. This is done
# By adding the '-R' option to the syslogd_options in
#/Etc/sysconfig/syslog
#
#2) Configure local2 events to go to the/var/log/haproxy. Log
# File. A line like the following can be added
#/Etc/sysconfig/syslog
#
# Local2. */var/log/haproxy. Log
#
Log 127.0.0.1 local2

Chroot/var/lib/haproxy
Pidfile/var/run/haproxy. PID
Maxconn 4000
User haproxy
Group haproxy
Daemon

# Turn on stats UNIX socket
Stats socket/var/lib/haproxy/stats

#---------------------------------------------------------------------
# Common defaults that all the 'listen' and 'backend' sections will
# Use if not designated in their block
#---------------------------------------------------------------------
Ults
Mode HTTP
Log global
Option httplog
Option dontlognull
Option http-server-close
Option forwardfor partition t 127.0.0.0/8
Option redispatch
Retries 3
Timeout http-request 10 s
Timeout queue 1 m
Timeout connect 10 s
Timeout client 1 m
Timeout Server 1 m
Timeout http-keep-alive 10 s
Timeout check 10 s
Maxconn 3000

Frontend main
BIND: 80
BIND: 8088
# ACL clear dst_port 8088
# ACL login path_beg/login
# Redirect location http://www.baidu.com if login
# Redirect prefix/if clear
# Reqadd X-Proto: \ SSL if clear
# Rspadd X-via: \ haproxy if clear
# Option forwardfor partition t 127.0.0.0/8
# ACL url_static path_beg-I/images/stylesheets/vedios/JavaScript
# ACL url_static path_end-I. jpg. html. CSS. js. PNG. gif
# Use_backend static if url_static
Default_backend webservers

# Backend static
# Balance roundrobin
# Server S1 192.168.1.10: 80 check port 80
# Server B1 127.0.01: 8080 backup check port 8080
Backend webservers
Balance roundrobin
# Cookie ninghongliang insert nocache
Server S2 192.168.1.1: 80 check port 80
Server S1 192.168.1.10: 80 check port 80
Server B1 127.0.01: 8080 backup check port 8080
Stats enable
Stats hide-version
Stats uri/haha? Stats
Stats scope.
Stats realm haporx \ boy
Stats auth admin1: Admin
Stats admin if true
Keepalived configuration file
! Configuration file for keepalived

Global_defs {
Notification_email {
[Email protected]
}
Notification_email_from [email protected]
Smtp_server 127.0.0.1
Smtp_connect_timeout 30
}
Vrrp_script chk_sched_down {
Script "[-E/etc/keepalived/down] & Exit 1 | exit 0"
Interval 2
Weight-50
Fall 2
Rise 1
}
Vrrp_script chk_haproxy {
Script "/etc/keepalived/check_haproxy.sh"
Interval 2
Weight-50
Fall 2
Rise 1
}

Vrrp_instance vi_1 {
State master
Interface eth0
Virtual_router_id 77
Priority100
Advert_int 1
Authentication {
Auth_type pass
Auth_pass Ning
}
Virtual_ipaddress {
172.16.3.88
}
Track_script {
Chk_sched_down
Chk_haproxy
}
}
Vm2-keepalived + haproxy Configuration
# Ifconfig eth0 172.16.3.3/16 up
# Ifconfig eth1 192.168.1.3/24 up
# Yum install keepalived haproxy-y
Haproxy configuration file: (the configuration here is the same as the above, not described here)
Keepalived configuration file
! Configuration file for keepalived

Global_defs {
Notification_email {
[Email protected]
}
Notification_email_from [email protected]
Smtp_server 127.0.0.1
Smtp_connect_timeout 30
}
Vrrp_script chk_sched_down {
Script "[-E/etc/keepalived/down] & Exit 1 | exit 0"
Interval 2
Weight-50
Fall 2
Rise 1
}
Vrrp_script chk_haproxy {
Script "/etc/keepalived/check_haproxy.sh"
Interval 2
Weight-50
Fall 2
Rise 1
}

Vrrp_instance vi_1 {
State backup
Interface eth0
Virtual_router_id 77
Priority 99
Advert_int 1
Authentication {
Auth_type pass
Auth_pass Ning
}
Virtual_ipaddress {
172.16.3.88
}
Track_script {
Chk_sched_down
Chk_haproxy
}
}
The detection script haprxoy script chk_haproxy is used here (if haproxy cannot be launched after 3 seconds, disable keepalived)
#! /Bin/bash
A = 'ps-C haproxy -- no-header | WC-l'
If [$ A-EQ 0]; then
/Usr/sbin/haproxy-F/etc/haproxy. cfg
Sleep 3
If ['ps-C haproxy -- no-header | WC-l'-EQ 0]; then
/Etc/init. d/keepalived stop
Fi
Fi

Vm3-web: Configuration
# Ifconfig eth0 192.168.1.1/24 up
# Yum install nginx-y
# Echo "192.168.1.1">/usr/share/nginx/html/index.html
Vm4-web: Configuration
# Ifconfig eth0 192.168.1.10/24 up
# Yum install nginx-y
# Echo "192.168.1.10">/usr/share/nginx/html/index.html

Test:
(1) run both the master and slave nodes # ip addr show
MASTER: eth0: <broadcast, multicast, up, lower_up> MTU 1500 qdisc pfifo_fast state up qlen 1000
Link/ether 00: 0C: 29: D7: F7: 9C brd ff: FF
Inet 172.16.3.2/16 BRD 172.16.255.255 scope global eth0
Inet 172.16.3.88/32 scope global eth0
Valid_lft forever preferred_lft forever
From: eth0: <broadcast, multicast, up, lower_up> MTU 1500 qdisc pfifo_fast state up qlen 1000
Link/ether 00: 0C: 29: 0b: 35: 6a brd ff: FF
Inet 172.16.3.3/16 BRD 172.16.255.255 scope global eth0
Inet6 fe80: 20c: 29ff: fe0b: 356a/64 scope Link
Valid_lft forever preferred_lft forever
(2) Stop haproxy on the master. keepalived will automatically start it again after 2 seconds.
(3) Stop the master keepalived and the slave server takes over the service immediately.
Eth0: <broadcast, multicast, up, lower_up> MTU 1500 qdisc pfifo_fast state up qlen 1000
Link/ether 00: 0C: 29: 0b: 35: 6a brd ff: FF
Inet 172.16.3.3/16 BRD 172.16.255.255 scope global eth0
Inet 172.16.3.88/32 scope global eth0
Valid_lft forever preferred_lft forever
(4) Local testing: (because the above is just a simple definition of rotation, there is no definition of dynamic/static separation)
Http: // 172.16.3.88
Images and truth

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650) This. width = 650; "style =" border-bottom: 0px; border-left: 0px; border-top: 0px; border-right: 0px "Title =" haproxy keepalived test Fig 2 "border =" 0 "alt =" haproxy keepalived test Fig 2 "src =" http://img1.51cto.com/attachment/201409/19/1384120_1411144958cVNV.jpg "441" Height = "213"/>

Keepalived + haproxy + nginx