Highavailability and LoadBalancer

Highavailability LoadBalancer

Red Hat RHCs LVs( three operating modes, 10 algorithms ) kernel level scheduling, performance will be relatively high MySQL

Corosync/heartbeat nginx(reverse proxy) application layer scheduling

keepalived Haproxy application-level scheduling

Note:

Nginx and Haproxy are often used in Web services for load balancing, supporting regular expressions

Haproxy throughput to nginx higher , can reach the million-class

LVS is more suitable for back-end service scheduling

Nginx and haproxy are more suitable for the relative front-end service scheduling

Keepalived+lvs is the best shot,LVs does not have a health check on the back end of the RS, and keepalived automatically checks the back end of the RS for Health, and dynamically adjusts The strategy of LVS

Corosync-ha Communication Engine

Corosync and Heartbeat are responsible for heartbeat communication between HA nodes, with less necessary resource managers, and can be used in conjunction with resource managers such as Pacmaker.

Highavailability and LoadBalancer