| Host FAIL OVER not LB or RR, fail over to standby I am looking to have a setup where I have some HOT standby servers which will handle the failure of a main server. For this example:
host.mydomain.invalid is the MAIN SERVER
host2.mydomain.invalid backup #1
host3.mydomain.invalid backup #3
In the event that the main server goes down, then all traffic should move to the Backup #1, such that a query via DNS would point to the IP of host2.mydomain.invalid, rinse, lather, repeat for a failure of backup #2.
When the MAIN server were to come back online then everything should move BACK TO IT.
Let me reiterate I am NOT interested in:
Load Balancing
Round Robin.
I do NOT want the backups used unless there is a failure of the main server, period.
Is DNSEasy and their DNS server the only way to do this?? ?
Another service?
A method to do this via the DNS provided by my registrar (NameCheap), via records in the DNS setup on the servers (CentOS 6 64bit), other? ? ?
Anything that is CHEAP... Not every one has a champagne budget to do these things.
I've ready many things about how fail over , round robin etc. is not the way, but it does work. I am aware that some ISP's will cause issues with low TTL's as they feel they know better, perceived abuse, etc...
I am looking for comments and suggestions on doing this under my criteria, cheaply, reliably and with out RR, or LB.
Any one with comments from you setup how your doing it?
Thanks! |
