Keepalived is a component used to configure LVS. The project was launched in 2001.
As LVS is a relatively basic and static system, it needs software to maintain its configuration. Keepalived can test the availability of a service (e.g. TCP connections, HTTP queries, etc.) and update the list of usable servers for LVS. It also manages an IP switch system based on VRRP, for its own redundancy.
Keepalived is supplied under the GPL.
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