lvs+keepalived配置脚本
通过脚本参数参数配置keepalived.conf，配置格式如下：（支持自定义模版的lvs健康检查）
! Configuration File for keepalived
global_defs {
notification_email {
[email protected]
[email protected]
[email protected]
}
notification_email_from [email protected]
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id demo
}
vrrp_instance demo {
state MASTER
interface eth0
virtual_router_id 10
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass demo
}
virtual_ipaddress {
10.0.0.1
10.0.0.2
}
}
virtual_server 10.0.0.1 80 {
delay_loop 6
lb_algo rr
lb_kind DR
nat_mask 255.0.0.0
persistence_timeout 60
protocol TCP
real_server 10.0.100.1 80 {
weight 1
TCP_CHECK {
connect_port 80
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 10.0.100.2 80 {
weight 1
TCP_CHECK {
connect_port 80
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
virtual_server 10.0.0.2 8080 {
delay_loop 6
lb_algo wrr
lb_kind DR
nat_mask 255.0.0.0
persistence_timeout 60
protocol TCP
real_server 10.0.200.1 8080 {
weight 1
TCP_CHECK {
connect_port 8080
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 10.0.200.2 8080 {
weight 1
TCP_CHECK {
connect_port 8080
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
Usage:
keepalived-cfg --init --rid router_id
keepalived-cfg --add-vrrp --name vrrp_name --vid virtual_router_id --vip virtual_ipaddress [options]
keepalived-cfg --edit-vrrp --name vrrp_name -P|--priority priority
keepalived-cfg --delete-vrrp --name vrrp_name
keepalived-cfg -A|E -t|u service-address [-s scheduler] [-M|--netmask netmask]
keepalived-cfg -D -t|u service-address
keepalived-cfg -a|e -t|u service-address -r server-address [options]
keepalived-cfg -d -t|u service-address -r server-address
keepalived-cfg -L|l
keepalived-cfg -H -t|u service-address -r server-address
keepalived-cfg -S -t|u service-address -r server-address
keepalived-cfg -h
Commands:
Either long or short options are allowed.
--init init keepalived.conf
--add-vrrp add vrrp instance with options
--edit-vrrp edit vrrp instance with options
--delete-vrrp delete vrrp instance
--add-service -A add virtual service with options
--edit-service -E edit virtual service with options
--delete-service -D delete virtual service
--add-server -a add real server with options
--edit-server -e edit real server with options
--delete-server -d delete real server
--list-vrrp -L list vrrp instance with json
--list-lvs -l list LVS table with json
--show-server -S show real server
--hide-server -H hide real server
--help -h display this help message
Options:
--name vrrp instance
--state vrrp state [MASTER|BACKUP]
the default state is MASTER
--interface -I vrrp interface
--vid vrrp virtual_router_id [1-255]
--priority -P vrrp priority [1-100]
the default priority is 100
--password authentication password
--vip virtual_ipaddress is host
--tcp-service -t service-address service-address is host[:port]
--udp-service -u service-address service-address is host[:port]
--scheduler -s scheduler one of rr|wrr|lc|wlc|lblc|lblcr|dh|sh|sed|nq,
the default scheduler is wrr.
--persistent -p [timeout] persistent service
the default persistent timeout is 60
--netmask -M netmask persistent granularity mask
--real-server -r server-address server-address is host (and port)
--gatewaying -g gatewaying (direct routing) (default)
--ipip -i ipip encapsulation (tunneling)
--masquerading -m masquerading (NAT)
--weight -w weight capacity of real server [1-100]
the default weight is 1
--check -c URL check template of real-server
需安装keepalived及ipvsadm
根据实际情况修改脚本中19-33行及48-60行内容
1、初始化配置文件，指定router_id为demo（清空所有配置）
keepalived-cfg --init --rid demo
2、添加vrrp_instance，指定名称为demo，声明为主服务器，使用网卡eth0，virtual_router_id为10，优先级100，认证密码demo，虚拟ip为10.0.0.1和10.0.0.2
keepalived-cfg --add-vrrp --name demo --state MASTER -I eth0 --vid 10 --priority 100 --password demo --vip 10.0.0.1,10.0.0.2
3、添加virtual_server，TCP协议，80端口，加权轮询调度，DR模式，超时时间120秒
keepalived-cfg -A -t 10.0.0.1:80 -M 255.0.0.0 -s wrr -g -p 120
4、添加real_server,权重为3，使用默认TCP_CHECK检查
keepalived-cfg -a -t 10.0.0.1:80 -r 10.0.100.1 -w 3
5、添加real_server,权重为5，使用自定义模版，地址为http://www.example.com/demo
keepalived-cfg -a -t 10.0.0.1:80 -r 10.0.100.2 -w 5 -c "http://www.example.com/demo"
#模版内容：
#[root@localhost ~]# curl -s http://www.example.com/demo
#HTTP_GET {
# url {
# path /check.html
# digest cc2dbff2ec2178dfa42e20b5sa5dv39d
# }
# connect_timeout 3
# nb_get_retry 3
# delay_before_retry 3
#}
6、删除vrrp_instance（将删除包含该vrrp虚拟IP的所有virtual_server）
keepalived-cfg --delete-vrrp --name demo
7、删除virtual_server（将删除该virtual_server下所有real_server）
keepalived-cfg -D -t 10.0.0.1:80
8、删除real_server
keepalived-cfg -d -t 10.0.0.1:80 -r 10.0.100.2
9、隐藏/注释real_server（用于临时摘除real_server）
keepalived-cfg -H -t 10.0.0.1:80 -r 10.0.100.1
10、显示/取消注释real_server（用于恢复临时摘除的real_server）
keepalived-cfg -S -t 10.0.0.1:80 -r 10.0.100.1
11、修改vrrp优先级
keepalived-cfg --edit-vrrp --name demo --priority 90
12、修改virtual_server调度模式
keepalived-cfg -E -t 10.0.0.1:80 -s rr
13、修改real_server权重
keepalived-cfg -e -t 10.0.0.1:80 -r 10.0.100.1 -w 5
14、以JSON格式输出vrrp列表
keepalived-cfg -L
15、以JSON格式输出lvs列表
keepalived-cfg -l
1 :无效选项
2 :参数格式错误
3 :缺少必要参数
4 :未找到
5 :无法访问Check模版地址
11:vrrp name已存在
12:vrrp name不存在
13:virtual route id已存在
15:virtual ipaddress已存在
16:virtual ipaddress不存在
21:virtual server已存在
22:virtual server不存在
31:real server已存在
32:real server不存在