What is LVS keepalived?
Keepalived provides a strong and robust health checking for LVS clusters. It implements a framework of health checking on multiple layers for server failover, and VRRPv2 stack to handle director failover.
What is keepalived used for?
The keepalived daemon can be used to monitor services or systems and to automatically failover to a standby if problems occur. In this guide, we will demonstrate how to use keepalived to set up a highly available web service. We will configure a floating IP address that can be moved between two capable web servers.
What is keepalived service?
Keepalived is a piece of software which can be used to achieve high availability by assigning two or more nodes a virtual IP and monitoring those nodes, failing over when one goes down. Keepalived can do more, like load balancing and monitoring, but this tutorial focusses on a very simple setup, just IP failover.
Is keepalived a Loadbalancer?
Keepalived is used to implement a dedicated active/passive load balancer across two servers, which forward traffic to a pool of two real servers. In this setup, a VRRP instance is setup across a pair of dedicated load balancers in an active/passive configuration.
What is HAProxy and keepalived?
HAProxy (High Availability Proxy) is a free, very fast and reliable solution offering high availability, load balancing, and proxying for TCP and HTTP-based applications. On the other hand, Keepalived is detailed as “A routing software written in C”.
What is LVS router?
Linux Virtual Server (LVS) is a set of integrated software components for balancing the IP load across a set of real servers. LVS runs on a pair of equally configured computers: one that is an active LVS router and one that is a backup LVS router.
How do you set up LVS?
Enter the floating IP address and device of the NAT router. This IP address must be the default route used by each real server to communicate with the active LVS router. The IP address is aliased to the device (for example, eth1:1) connecting the LVS routers to the private network of real servers.