定义keepalived的双主模型和lvs
配置keepalived为实现haproxy高可用的双主模型配置文件示例：
说明：其基本实现思想为创建两个虚拟路由器，并以两个节点互为主从。
server1
! Configuration File for keepalived
global_defs {
notification_email {
}
notification_email_from [email protected]
smtp_connect_timeout 3
smtp_server 127.0.0.1
router_id LVS_DEVEL
}
vrrp_script chk_haproxy {
script "killall -0 haproxy"
interval 1
weight 2
}
vrrp_script chk_mantaince_down {
script "[[ -f /etc/keepalived/down ]] && exit 1 || exit 0"
interval 1
weight 2
}
vrrp_instance VI_1 {
interface eth0
state MASTER # BACKUP for slave routers
priority 101 # 100 for BACKUP
virtual_router_id 51
garp_master_delay 1
authentication {
auth_type PASS
auth_pass password
}
track_interface {
eth0
}
virtual_ipaddress {
172.16.100.1/16 dev eth0 label eth0:0
}
track_script {
chk_haproxy
chk_mantaince_down
}
notify_master "/etc/keepalived/notify.sh master"
notify_backup "/etc/keepalived/notify.sh backup"
notify_fault "/etc/keepalived/notify.sh fault"
}
vrrp_instance VI_2 {
interface eth0
state BACKUP # BACKUP for slave routers
priority 100 # 100 for BACKUP
virtual_router_id 52
garp_master_delay 1
authentication {
auth_type PASS
auth_pass password
}
track_interface {
eth0
}
virtual_ipaddress {
172.16.100.2/16 dev eth0 label eth0:1
}
track_script {
chk_haproxy
chk_mantaince_down
}
}
说明：
1、对于VI_1和VI_2来说，两个节点要互为主从关系；
server2
配置keepalived为实现haproxy高可用的双主模型配置文件示例：
说明：其基本实现思想为创建两个虚拟路由器，并以两个节点互为主从。
! Configuration File for keepalived
global_defs {
notification_email {
}
notification_email_from [email protected]
smtp_connect_timeout 3
smtp_server 127.0.0.1
router_id LVS_DEVEL
}
vrrp_script chk_haproxy {
script "killall -0 haproxy"
interval 1
weight 2
}
vrrp_script chk_mantaince_down {
script "[[ -f /etc/keepalived/down ]] && exit 1 || exit 0"
interval 1
weight 2
}
vrrp_instance VI_1 {
interface eth0
state BACKUP # BACKUP for slave routers
priority 99 # 100 for BACKUP
virtual_router_id 51
garp_master_delay 1
authentication {
auth_type PASS
auth_pass password
}
track_interface {
eth0
}
virtual_ipaddress {
172.16.100.1/16 dev eth0 label eth0:0
}
track_script {
chk_haproxy
chk_mantaince_down
}
notify_master "/etc/keepalived/notify.sh master"
notify_backup "/etc/keepalived/notify.sh backup"
notify_fault "/etc/keepalived/notify.sh fault"
}
vrrp_instance VI_2 {
interface eth0
state MASTER # BACKUP for slave routers
priority 101 # 100 for BACKUP
virtual_router_id 52
garp_master_delay 1
authentication {
auth_type PASS
auth_pass password
}
track_interface {
eth0
}
virtual_ipaddress {
172.16.100.2/16 dev eth0 label eth0:1
}
track_script {
chk_haproxy
chk_mantaince_down
}
}
说明：
1、对于VI_1和VI_2来说，两个节点要互为主从关系；
LVS + keepalived的实现：
! Configuration File for keepalived
global_defs {
notification_email {
}
notification_email_from [email protected]
smtp_connect_timeout 3
smtp_server 127.0.0.1
router_id LVS_DEVEL
}
vrrp_script chk_schedown {
script "[[ -f /etc/keepalived/down ]] && exit 1 || exit 0"
interval 2
weight -2
}
vrrp_instance VI_1 {
interface eth0
state MASTER
priority 101
virtual_router_id 51
garp_master_delay 1
authentication {
auth_type PASS
auth_pass password
}
track_interface {
eth0
}
virtual_ipaddress {
172.16.100.1/16 dev eth0 label eth0:0
}
track_script {
chk_schedown
}
}
virtual_server 172.16.100.1 80 {
delay_loop 6
lb_algo rr
lb_kind DR
persistence_timeout 50
protocol TCP
# sorry_server 192.168.200.200 1358
real_server 172.16.100.11 80 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 172.16.100.12 80 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
如果要使用TCP_CHECK检测各realserver的健康状态，那么，上面关于realserver部分的定义也可以替换为如下内容：
virtual_server 172.16.100.1 80 {
delay_loop 6
lb_algo rr
lb_kind DR
persistence_timeout 300
protocol TCP
sorry_server 127.0.0.1 80
real_server 172.16.100.11 80 {
weight 1
TCP_CHECK {
tcp_port 80
connect_timeout 3
}
}
real_server 172.16.100.12 80 {
weight 1
TCP_CHECK {
connect_port 80
connect_timeout 3
}
}
}
说明：其中的sorry_server是用于定义所有realserver均出现故障时所用的服务器。