failover Archive

Howto: Memcached replication = Repcached

Intro Implementation of replicated memcached is fairly easy. Even though memcache isn’t suppose to be used in this manner and should be used as violatile service, there is alternative, which can replicate data from one memcached to another. It’s called Repcached. As long as one repcached server is up, you will keep all your data

Howto: Libvirt, Vyatta, Failover IP and Hetzner

Overview We will use 2 Vyatta routers, make one primary gateway for all internal servers and when primary Vyatta crashes, the backup router will take gateway IP with help of VRRP and aditionally switch frontend Failover IPĀ from one server to another. Prerequisites 2 physical servers on Hetzner Failover IP Internal NIC in both servers, to

Loadbalancing / failover with IPVS and keepalived

Introduction Correct failover and loadbalancing is crucial for high availablility environment. With proper setup we can eliminate single points of failure in case of server crash. I use linux kernel’s support for load balancing, since that seems as well documented and scalable method. What I want to achieve here, is actually fully redundant architecture, so