在CentOS上实现SFTP服务器的负载均衡,可以采用多种方法。以下是两种常见的方法:
安装HAProxy
在所有节点上安装HAProxy:
sudo yum install haproxy -y
配置HAProxy
编辑/etc/haproxy/haproxy.cfg
文件,添加以下配置:
global
log /dev/log local0
log /dev/log local1 notice
daemon
defaults
log global
mode tcp
option tcplog
timeout connect 5000ms
timeout client 50000ms
timeout server 50000ms
frontend sftp_frontend
bind *:22
default_backend sftp_backend
backend sftp_backend
balance roundrobin
server sftp_server1 192.168.1.101:22 check
server sftp_server2 192.168.1.102:22 check
server sftp_server3 192.168.1.103:22 check
这个配置将SFTP流量分发到三个后端服务器。
启动HAProxy
sudo systemctl start haproxy
sudo systemctl enable haproxy
安装Keepalived和LVS
在所有节点上安装Keepalived和LVS:
sudo yum install keepalived lvs -y
配置Keepalived
编辑/etc/keepalived/keepalived.conf
文件,添加以下配置:
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 42
}
virtual_ipaddress {
192.168.1.100
}
}
virtual_server 192.168.1.100 22 {
delay_loop 6
lb_algo rr
lb_kind DR
nat_mask 255.255.255.0
persistence_timeout 50
protocol TCP
real_server 192.168.1.101 22 {
weight 1
TCP_CHECK {
connect_timeout 10
connect_port 22
}
}
real_server 192.168.1.102 22 {
weight 1
TCP_CHECK {
connect_timeout 10
connect_port 22
}
}
real_server 192.168.1.103 22 {
weight 1
TCP_CHECK {
connect_timeout 10
connect_port 22
}
}
}
这个配置将虚拟IP地址192.168.1.100
绑定到三个后端服务器。
启动Keepalived
sudo systemctl start keepalived
sudo systemctl enable keepalived
通过以上方法,你可以在CentOS上实现SFTP服务器的负载均衡,提高系统的可用性和性能。