Shulou(Shulou.com)06/03 Report--

Load balancing (Cloud Load Balancer) is a service that distributes traffic to multiple CVMs. Load balancing can expand the external service capacity of the application system through traffic distribution and improve the availability of the application system by eliminating a single point of failure. The cloud load balancer service virtualizes multiple CVM resources located in the same region into a high-performance and highly available application service pool by setting virtual service addresses (VIP). Distribute the network requests from the client to the cloud server pool according to the way specified by the application. The load balancer service checks the health status of the CVM instances in the CVM pool and automatically isolates the abnormal instances, thus solving the single point problem of the CVM and improving the overall service capability of the application. Today, I will introduce to you the principle and working mode of LVS load balancing cluster-- keepalived+DR.

Keepalived implementation principle keepalived uses vrrp hot backup protocol to realize the multi-machine hot backup function of Linux cloud server vrrp, virtual routing redundancy protocol, is a backup solution for routers keepalivd file explains that keepalived can realize multi-machine hot backup, each hot backup group has multiple servers, the most commonly used is that the failover of dual-machine hot backup is realized by the drift of virtual IP address, which is suitable for all kinds of application server experimental schematics.

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