lvs+keepalived+mariadb集群
1、环境准备
节点1：172.16.2.95
节点2：172.16.2.160
节点3：172.16.2.220
LVS1：172.16.2.67
LVS2：172.16.2.234
2、mariadb集群的安装
https://www.cnblogs.com/linyouyi/p/11515639.html
3、在三台安装mariadb机器操作
echo > /proc/sys/net/ipv4/conf/lo/arp_ignore
echo > /proc/sys/net/ipv4/conf/lo/arp_announce
echo > /proc/sys/net/ipv4/conf/all/arp_ignore
echo > /proc/sys/net/ipv4/conf/all/arp_announce
ifconfig lo: 172.16.2.253 broadcast 172.16.2.253 netmask 255.255.255.255 up
#ifconfig lo: 172.16.2.253 netmask 255.255.255.255 up
route add -host 172.16.2.253 lo:
3.1、查看虚拟ip
//01
[root@hadoop01 linyouyi]# ip addr show lo
: lo: <LOOPBACK,UP,LOWER_UP> mtu qdisc noqueue state UNKNOWN group default qlen
link/loopback ::::: brd :::::
inet 127.0.0.1/ scope host lo
valid_lft forever preferred_lft forever
inet 172.16.2.253/ brd 172.16.2.253 scope global lo:
valid_lft forever preferred_lft forever
inet6 ::/ scope host
valid_lft forever preferred_lft forever
[root@hadoop01 linyouyi]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 172.16.2.1 0.0.0.0 UG eth0
0.0.0.0 172.16.2.1 0.0.0.0 UG eth0
169.254.169.254 172.16.2.1 255.255.255.255 UGH eth0
172.16.2.0 0.0.0.0 255.255.255.0 U eth0
172.16.2.253 0.0.0.0 255.255.255.255 UH lo
172.17.0.0 0.0.0.0 255.255.0.0 U docker0
//02
[root@hadoop02 mariadb]# ip addr show lo
: lo: <LOOPBACK,UP,LOWER_UP> mtu qdisc noqueue state UNKNOWN qlen
link/loopback ::::: brd :::::
inet 127.0.0.1/ scope host lo
valid_lft forever preferred_lft forever
inet 172.16.2.253/ brd 172.16.2.253 scope global lo:
valid_lft forever preferred_lft forever
inet6 ::/ scope host
valid_lft forever preferred_lft forever
[root@hadoop02 mariadb]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 172.16.2.1 0.0.0.0 UG eth0
169.254.169.254 172.16.2.1 255.255.255.255 UGH eth0
172.16.2.0 0.0.0.0 255.255.255.0 U eth0
172.16.2.253 0.0.0.0 255.255.255.255 UH lo
172.17.0.0 0.0.0.0 255.255.0.0 U docker0
//03
[root@hadoop03 mariadb]# ip addr show lo
: lo: <LOOPBACK,UP,LOWER_UP> mtu qdisc noqueue state UNKNOWN qlen
link/loopback ::::: brd :::::
inet 127.0.0.1/ scope host lo
valid_lft forever preferred_lft forever
inet 172.16.2.253/ brd 172.16.2.253 scope global lo:
valid_lft forever preferred_lft forever
inet6 ::/ scope host
valid_lft forever preferred_lft forever
[root@hadoop03 mariadb]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 172.16.2.1 0.0.0.0 UG eth0
169.254.169.254 172.16.2.1 255.255.255.255 UGH eth0
172.16.2.0 0.0.0.0 255.255.255.0 U eth0
172.16.2.253 0.0.0.0 255.255.255.255 UH lo
172.17.0.0 0.0.0.0 255.255.0.0 U docker0
4、LVS1安装keepalived-1.3.5和ipvsadm-1.27
[root@LVS1 ~]# yum -y install keepalived ipvsadm
[root@LVS1 ~]# cd /etc/keepalived
[root@LVS1 keepalived]# cp keepalived.conf keepalived.conf.bak
[root@LVS1 keepalived]# vim keepalived.conf
global_defs {
notification_email {
admin@linyouyi.com
}
notification_email_from ka@localhost
smtp_server 127.0.0.1
smtp_connect_timeout
router_id lvs1
} vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id
priority
advert_int
authentication {
auth_type pass
auth_pass forlvs
}
virtual_ipaddress {
172.16.2.253
}
} virtual_server 172.16.2.253 {
delay_loop
lb_algo rr
lb_kind DR
nat_mask 255.255.255.255
persistence_timeout
protocol TCP
real_server 172.16.2.95 {
weight
TCP_CHECK {
connect_timeout
nb_get_retry
delay_before_retry
connect_port
}
}
real_server 172.16.2.220 {
weight
TCP_CHECK {
connect_timeout
nb_get_retry
delay_before_retry
connect_port
}
}
real_server 172.16.2.160 {
weight
TCP_CHECK {
connect_timeout
nb_get_retry
delay_before_retry
connect_port
}
}
} [root@LVS1 keepalived]# systemctl start keepalived
[root@LVS1 keepalived]# ipvsadm -Ln
IP Virtual Server version 1.2. (size=)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 172.16.2.253: rr persistent
-> 172.16.2.95: Route
-> 172.16.2.160: Route
-> 172.16.2.220: Route
// 但是其他的机器总是访问不了vip,不知道是云主机不能用keepalived虚拟ip还是啥原因,还没找到
4.1、测试
[root@LVS1 keepalived]# ip addr show eth0
: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu qdisc pfifo_fast state UP group default qlen
link/ether fa::3e:2f:b0:e0 brd ff:ff:ff:ff:ff:ff
inet 172.16.2.67/ brd 172.16.2.255 scope global dynamic eth0
valid_lft 85187sec preferred_lft 85187sec
inet 172.16.2.253/ scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::f816:3eff:fe2f:b0e0/ scope link
valid_lft forever preferred_lft forever
//把数据库220的mariadb停掉
[root@LVS1 keepalived]# ipvsadm
IP Virtual Server version 1.2. (size=)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP cx--.novalocal:mysql rr persistent
-> 172.16.2.95:mysql Route
-> 172.16.2.160:mysql Route
5、LVS1安装keepalived-1.3.5和ipvsadm-1.27
[root@LVS2 keepalived]# vim keepalived.conf
global_defs { router_id lvs2
} vrrp_instance VI_1 {
state BACKUP priority } }
//配置文件这几项改一下,其余的步骤和LVS1一样
5.1、测试LVS高可用
把LVS1的keepalived停掉,看VIP会不会自动移动到LVS2
[root@LVS1 keepalived]# systemctl stop keepalived [root@LVS2 ~]# ip addr show eth0
: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu qdisc pfifo_fast state UP group default qlen
link/ether fa::3e:a3:: brd ff:ff:ff:ff:ff:ff
inet 172.16.2.234/ brd 172.16.2.255 scope global dynamic eth0
valid_lft 62412sec preferred_lft 62412sec
inet 172.16.2.253/ scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::f816:3eff:fea3:/ scope link
valid_lft forever preferred_lft forever
[root@LVS2 ~]# ipvsadm
IP Virtual Server version 1.2. (size=)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP cx--.novalocal:mysql rr persistent
-> 172.16.2.95:mysql Route
-> 172.16.2.160:mysql Route
-> 172.16.2.220:mysql Route
但是其他的机器总是访问不了vip,不知道是云主机不能用keepalived虚拟ip还是啥原因,还没找到,似乎是云服务器的vip需要申请，跟服务商申请。反正就是云服务器跟虚拟机不一样
https://www.cnblogs.com/galengao/articles/7417520.html
//每台主机查一下arp,发现VIP的HWaddress都是incomplete,也就是无法获取mac硬件地址,所以不知道指向那台机器,因此无法ping通,无法访问
[root@cx-- ~]# arp -n
Address HWtype HWaddress Flags Mask Iface
172.16.2.1 ether fa::3e:3d:4d:a0 C eth0
10.42.2.0 (incomplete) flannel.
172.16.2.95 ether fa::3e:dc:a1:c6 C eth0
172.16.2.222 (incomplete) eth0
172.16.2.67 ether fa::3e:2f:b0:e0 C eth0
172.17.0.2 ether ::ac::: C docker0
10.42.1.0 (incomplete) flannel.
172.17.0.4 ether ::ac::: C docker0
172.16.2.254 ether fa::3e:de:bd:f9 C eth0
172.16.2.234 ether fa::3e:a3:: C eth0
172.16.2.253 (incomplete) eth0
172.17.0.3 ether ::ac::: C docker0
172.16.2.17 ether fa::3e:f3:5e:6f C eth0 //清空arp缓存依然不行
[root@LVS1 keepalived]# arp -n|awk '/^[1-9]/{system("arp -d "$1)}'
SIOCDARP(dontpub): Network is unreachable
SIOCDARP(dontpub): Network is unreachable
ipvsadm -lnc
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