Re: [Full-disclosure] Server Redundancy

[wac]

Hi:

Thanks I'll check ipvs.

Regards
Waldo

On 8/10/06, Tim Hecktor < [EMAIL PROTECTED]> wrote:

Hello,

 

<Isn't there a way to map a name to several IPs?
<Or use aliases?

 

Maybe this is what you are looking for:

 

pandora:~# dig ftp.freenet.de

 

; <<>> DiG 9.2.1 <<>> ftp.freenet.de
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 59136
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 3, ADDITIONAL: 3

 

;; QUESTION SECTION:
;ftp.freenet.de.                        IN      A

 

;; ANSWER SECTION:
ftp.freenet.de .         1457    IN      CNAME   ftp-0.freenet.de.
ftp-0.freenet.de.       600     IN      A       194.97.2.69
ftp-0.freenet.de.       600     IN      A       194.97.2.70
ftp-0.freenet.de.       600     IN      A       194.97.2.67
ftp-0.freenet.de.       600     IN      A       194.97.2.68 

 

This will map a name to more than one ip and will give you load-balancing this way, but not real redundancy.

To map a service to different hosts redundant you can use a box running ipvs. This box can be made redundant with a identical box using mon and heartbeat to do ip failover.

 

Best regards,

Tim Hecktor

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