How to configuration keepalived on Amazon EC2?
- by oeegee
I rad some article.
Keepalived over GRE tunnel for failover on VPS environment
http://blog.killtheradio.net/how-tos/keepalived-haproxy-and-failover-on-the-cloud-or-any-vps-without-multicast/
but, I don't know how to configuration? and How to call this architecture?
only I Know that How to config Master/Backup configuration at keepalived.
What I want to know that How does work keepalived?
I want to design this....
                XMPP Server(EC2) 
                       |
-------------------------------------------------
keepalived Master(EC2) - keepalived Backup(EC2)
HAProxy #1               HAProxy#2      
-------------------------------------------------
                       |
Casandra#1   Casandra#2  Casandra#3  Casandra#4
Thanks!
but What I want to know how to work on keepalived with unicast patche modul.
ELB is expansive. 
and this is first totaly design.
[Flow]
ELB -- XMPP Server -- ELB -- Casandra
                      ELB
                       |
XMPP#1        XMPP#2       XMPP#3       XMPP#4 
                       |
                      ELB
                       |
Casandra#1   Casandra#2  Casandra#3  Casandra#4
and change first design.
[Flow]
ELB -- XMPP Server -- HAProxy Master(Casandra Farm) -- Casandra
                      ELB
                       |
XMPP#1        XMPP#2      XMPP#3       XMPP#4 
                       |
-------------------------------------------------
keepalived Master(EC2) - keepalived Backup(EC2)
HAProxy#1                HAProxy#2      
-------------------------------------------------
                       |
Casandra#1   Casandra#2  Casandra#3  Casandra#4
this is second.
[Flow]
ELB -- HAProxy(XMPP Farm) -- XMPP Server -- HAProxy(Casandra Farm) -- Casanda
It's OK?
                      ELB
                       |
HAProxy#1   HAProxy#2   HAProxy#3   HAProxy#4
XMPP#1       XMPP#2     XMPP#3      XMPP#4 
                       |
Casandra#1   Casandra#2  Casandra#3  Casandra#4