keepalived+LVS；keepalived+nginx
keepalived: LB:lvs,nginxHA:keepalived,heartbeat,corosync,cman
HP:高性能集群
分布式存储：HDFS
分布式计算：YARN,
batch:MapReduce
in-memory:spark
stream:storm
keepalived：
active/passive
ntp：network time protocol
date修改时间方法：
date：月日时分年.秒
date 102411262017.50
vrrp：virtual route redundent protocol 虚拟路由冗余协议
keepalived:
vrrp协议在linux主机上以守护进程的方式实现；
能够根据配置文件自动生成ipvs规则；
对各RS做健康状态检测；
组件：vrrp stack
checkers
ipvs warpper -->ipvs
配置文件的组成部分；
global configuration
vrrpd configuration
vrrp instance
vrrp synchonizationg group
lvs configuration
1.本机的主机名，各节点可以解析主机名
2.ntp时间同步
3.iptables关闭或者配置相应规则
双主配置。两组实例
主1
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state MASTER
interface eth1
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
172.16.6.88
}
}
vrrp_instance VI_2 {
state BACKUP
interface eth1
virtual_router_id 61
priority 99
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
172.16.6.99
}
}
主2
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state backup
interface eth0
virtual_router_id 51
priority 99
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
172.16.6.88
}
}
vrrp_instance VI_2 {
state master
interface eth0
virtual_router_id 61
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
172.16.6.99
}
}
keepalived+LVS负载均衡配置
主配置：
! Configuration File for keepalived
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
172.16.6.88
}
}
virtual_server 172.16.6.88 80 {
delay_loop 6 #健康检查时间间隔
lb_algo wrr #负载均衡调度算法
lb_kind DR #负载均衡转发规则
#persistence_timeout 20#设置会话保持时间
protocol TCP #协议
real_server 172.16.6.12 80 {
weight 1 #设置权重
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 172.16.6.13 80 {
weight 2
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}
备配置：
! Configuration File for keepalived
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 99
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
172.16.6.88
}
}
virtual_server 172.16.6.88 80 {
delay_loop 6 #健康检查时间间隔
lb_algo wrr #负载均衡调度算法
lb_kind DR #负载均衡转发规则
#persistence_timeout 20#设置会话保持时间
protocol TCP #协议
real_server 172.16.6.12 80 {
weight 1 #设置权重
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 172.16.6.13 80 {
weight 2
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}
vim rs.sh
#!/bin/bash
# description: Config realserver lo and apply noarp
VIP=172.16.6.88
case "$1" in
start)
ifconfig lo:0 $VIP netmask 255.255.255.255 broadcast $VIP
/sbin/route add -host $VIP dev lo:0
echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
sysctl -p >/dev/null 2>&1
echo "RealServer Start OK"
;;
stop)
ifconfig lo:0 down
route del $VIP >/dev/null 2>&1
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce
echo "RealServer Stoped"
;;
*)
echo "Usage: $0 {start|stop}"
exit 1
esac
exit 0
chmod +x rs.sh
./rs.sh start
启动服务
rs服务：service httpd start
keepalived服务器： service keepalived restart; ssh 172.16.6.15 'service keepalived restart'
keepalived+nginx配置
主:
! Configuration File for keepalived
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
#检查nginx进程是否存在。
vrrp_script chk_nginx {
script "killall -0 nginx &> /dev/null"
interval 1
weight -10
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
172.16.6.88
}
track_script {
chk_nginx
}
}
备：
! Configuration File for keepalived
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
#检查nginx进程是否存在。
vrrp_script chk_nginx {
script "killall -0 nginx &> /dev/null"
interval 1
weight -10
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 99
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
172.16.6.88
}
track_script {
chk_nginx
}
}
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