Deployment and implementation of LVS + keepalived + nginx + tomcat in CentOS

Deployment and implementation of LVS + keepalived + nginx + tomcat in CentOS

# Node Distribution

LVS-dr-master

Eth0: 192.168.146.141

LVS-dr-slave

Eth0: 192.168.146.142

Nginx1:

Eth0: 192.168.146.139

Nginx2:

Eth0: 192.168.146.140

Tomcat1:

Eth0: 192.168.146.138 4 tomcat Enabled

VIP: 192.168.146.200

# Topology:

# Specific configuration

### Lvs master

### 1. Install ipvsadm and keepalived

1yuminstall-ykeepalivedipvsadm

### 2. Use keepalived to manage lvs

Script:

Global_defs {router_idmaster_210} worker {worker # the master and slave values must be consistent with the priority151 # This value determines which server is worker {worker} virtual_ipaddress {192.168.146.200} virtual_server192.168.146.20080 {worker # worker {worker {token} real_server192.168.146.14080 {weight1TCP_CHECK {connect_timeout3nb_get_retry3delay_before_retry3connect_port80 }}}

### Lvs slave

### 1. Install ipvsadm and keepalived

Yuminstall-ykeepalivedipvsadm

### 2. Use keepalived to manage lvs

Global_defs {router_idslave_211} vrrp_instanceaiyou {users # the master and slave values must be consistent with the priority150 # This value determines which server is the master. Here we have a lower value than the master, so the role is backup, advert_int1authentication {authentication} virtual_ipaddress {192.168.146.200} virtual_server192.168.146.20080 {region # authentication {weight1TCP_CHECK {region} real_server192.168.146.14080 {weight1TCP_CHECK {region }}}

### Nginx1

### Run a script on nginx

#! /Bin/bash # ScripttostartLVSDRrealserver. # description: LVSDRrealserver #. /etc/rc. d/init. d/functionsVIP = 192.168.146.200 # change your VIP address host = '/bin/hostname' case "$1" instart) # StartLVS-DRrealserveronthismachine as needed. /sbin/ifconfiglodown/sbin/ifconfigloupecho1>/proc/sys/net/ipv4/conf/lo/arp_ignoreecho2>/proc/sys/net/ipv4/conf/lo/arp_announceecho1>/ proc/sys/net/ipv4/conf/all/arp_ignoreecho2>/proc/sys/net/ipv4/co Nf/all/arp_announce/sbin/ifconfiglo: 0 $ VIPbroadcast $ vipnetmask?%255up/sbin/routeadd-host $ VIPdevlo: 0; stop) # StopLVS-DRrealserverloopbackdevice (s ). /sbin/ifconfiglo: 0downecho0>/proc/sys/net/ipv4/conf/lo/arp_ignoreecho0>/proc/sys/net/ipv4/conf/lo/arp_announceecho0>/proc/sys/net/ipv4 /conf/all/arp_ignoreecho0>/proc/sys/net/ipv4/conf/all/arp_announce ;; status) # StatusofLVS-DRrealserver.islothere =' /Sbin/ifconfiglo: 0 | grep $ VIP 'isrothere = 'netstat-rn | grep "lo: 0" | grep $ VIP' if [! "$ Islothere"-o! "Isrothere"]; then # Eithertherouteorthelo: 0 device # notfound. echo "LVS-DRrealserverStopped. "elseecho" LVS-DRrealserverRunning. "fi; *) # Invalidentry. echo "$0: Usage: $0 {start | status | stop}" exit1; esac

### Nginx2

### Run a script on nginx

#! /Bin/bash # ScripttostartLVSDRrealserver. # description: LVSDRrealserver #. /etc/rc. d/init. d/functionsVIP = 192.168.146.200 # change your VIP address host = '/bin/hostname' case "$1" instart) # StartLVS-DRrealserveronthismachine as needed. /sbin/ifconfiglodown/sbin/ifconfigloupecho1>/proc/sys/net/ipv4/conf/lo/arp_ignoreecho2>/proc/sys/net/ipv4/conf/lo/arp_announceecho1>/ proc/sys/net/ipv4/conf/all/arp_ignoreecho2>/proc/sys/net/ipv4/co Nf/all/arp_announce/sbin/ifconfiglo: 0 $ VIPbroadcast $ vipnetmask?%255up/sbin/routeadd-host $ VIPdevlo: 0; stop) # StopLVS-DRrealserverloopbackdevice (s ). /sbin/ifconfiglo: 0downecho0>/proc/sys/net/ipv4/conf/lo/arp_ignoreecho0>/proc/sys/net/ipv4/conf/lo/arp_announceecho0>/proc/sys/net/ipv4 /conf/all/arp_ignoreecho0>/proc/sys/net/ipv4/conf/all/arp_announce ;; status) # StatusofLVS-DRrealserver.islothere =' /Sbin/ifconfiglo: 0 | grep $ VIP 'isrothere = 'netstat-rn | grep "lo: 0" | grep $ VIP' if [! "$ Islothere"-o! "Isrothere"]; then # Eithertherouteorthelo: 0 device # notfound. echo "LVS-DRrealserverStopped. "elseecho" LVS-DRrealserverRunning. "fi; *) # Invalidentry. echo "$0: Usage: $0 {start | status | stop}" exit1; esac

### Backend tomcat installation omitted

Multi-instance mode (non-Multi-VM)

### Test

### Master Verification

[Root @ lvs1 ~] # Ipvsadm-lnIPVirtualServerversion1.2.1 (size = 4096) ProtLocalAddress: PortSchedulerFlags-> RemoteAddress: temperature: 80wrr-> 192.168.146.139: 80Route100-> 192.168.146.140: 80Route100 [root @ lvs1 ~] #

### Server Load balancer Verification

[Root @ lvs2 ~] # Ipvsadm-lnIPVirtualServerversion1.2.1 (size = 4096) ProtLocalAddress: PortSchedulerFlags-> RemoteAddress: temperature: 80wrr-> 192.168.146.139: 80Route100-> 192.168.146.140: 80Route100 [root @ lvs2 ~] #

References:

Http://www.5ilinux.com/2014/05/lvs_keepalived_nginx_tomcat.html