check Availability before sending response
kcd at chrysler.com
Thu Dec 4 01:36:45 UTC 2008
Ken DBA wrote:
> Is there any way to make Bind check the server's availability before send back responses to clients?
> ie, given the domain name www.site.com was pointed to 126.96.36.199 and 188.8.131.52 in Bind.
> When a client query for www.site.com, Bind will check the health status for these two servers. If one is unavailable,Bind shouldn't direct client's requests to it.
> I know F5's 3DNS can do it well.But rather than 3DNS, is there any free way for this purpose? Thanks.
Roll your own monitoring system and have it modify the DNS RRset via
Dynamic Update (if you prefer) to reflect which server(s) are up/down at
any particular time.
That's essentially what all these fancy, expensive GSLB boxes do anyway.
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