在CentOS上实现LAMP(Linux, Apache, MySQL, PHP)架构的高可用性,通常涉及以下几个关键步骤和技术:
具体配置示例(基于Keepalived和HAProxy):
安装和配置Keepalived:
# 在两个节点上安装Keepalived
yum install keepalived haproxy -y
# 配置Keepalived
# 编辑 /etc/keepalived/keepalived.conf
vrrp_instance VI_1 {
state master
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type pass
auth_pass ab007
}
virtual_ipaddress {
192.168.12.21
}
}
vrrp_instance VI_2 {
state backup
interface eth0
virtual_router_id 61
priority 99
advert_int 1
authentication {
auth_type pass
auth_pass ab007
}
virtual_ipaddress {
192.168.12.22
}
}
配置HAProxy:
# 编辑 /etc/haproxy/haproxy.cfg
frontend http-in
bind 192.168.12.21:80
default_backend servers
backend servers
server server1 192.168.12.101:80
server server2 192.168.12.102:80
通过上述步骤和技术,可以在CentOS上实现一个高可用的LAMP架构,确保系统在发生故障时能够自动切换,保证服务的连续性和数据的安全性。