S2:Failover, HA, FT

[dorvan]

extend the configuration data, and the configuration case,
nodes, ip, user, passwords...

S2: Failover:

a virtual IP with 2 ethernet interfaces in 2 different hosts the interfaces will have a password and will be identified.

example:

ip addr add 10.1.1.252/24 dev ethX
ucarp -v 42 -p anthilla -a 10.1.1.252 -s 10.1.1.1 &
ucarp -v 42 -p anthilla -a 10.1.1.252 -s 10.1.1.2 &

in this case the identified is 42 and the password is anthilla

[dorvan]

http://tweenpath.net/simple-failover-cluster-using-ucarp-on-ubuntu-heartbeat-alternative/
https://www.pureftpd.org/project/ucarp
http://www.haproxy.org/news.html

[dorvan]

keepalived + haproxy + distributed conf.