[THIN] Re: Redundant Web interface for PNAgent
- From: Frank Monroe <Frank.Monroe@xxxxxxxxxxx>
- To: "'thin@xxxxxxxxxxxxx'" <thin@xxxxxxxxxxxxx>
- Date: Sun, 25 Jul 2004 16:05:34 -0500
When you are using round robin, the entire IP list is presented. The only
thing that round robin does is change the order of which IP address is
listed first.
-----Original Message-----
From: Chris Lynch [mailto:lynch00@xxxxxxx]
Sent: Sunday, July 25, 2004 5:02 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Redundant Web interface for PNAgent
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Within the PNAgent config. He was asking how to provide uptime for his
clients if the WI server were ever to go down. DNS Round-Robin does not
provide redundancy to the clients. I.E. You have two records with the same
name: WI.COMPANY.COM resolving to 1.1.1.1 and 1.1.1.2. If CLIENTA gets the
IP address resolution 1.1.1.1 and that server crashes, reboots, or becomes
unavailable, the client workstation is not going to re-query for the DNS
record unless the TTL expires. If the TTL does expire, the client has a
50/50 chance of getting the IP Address of the server that is online.
To provide a way for complete uptime, you will need to NLB the web servers.
What you were referring to was the MF server list within the PNAgent Admin
page.
Chris
> -----Original Message-----
> From: thin-bounce@xxxxxxxxxxxxx
> [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Frank Monroe
> Sent: Sunday, July 25, 2004 1:18 PM
> To: 'thin@xxxxxxxxxxxxx'
> Subject: [THIN] Re: Redundant Web interface for PNAgent
>
> This is how we have ours setup, DNS round robin. I just
> tested it. And it does work. If any of the servers in the
> IP address list are down, it simply tries another in the list
> until it find one that works. You don't have to use NLB if
> you don't want to.
>
> -----Original Message-----
> From: Chris Lynch [mailto:lynch00@xxxxxxx]
> Sent: Sunday, July 25, 2004 2:51 PM
> To: thin@xxxxxxxxxxxxx
> Subject: [THIN] Re: Redundant Web interface for PNAgent
>
>
>
> *** PGP SIGNATURE VERIFICATION ***
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> *** Signer: Chris Lynch <lynch00@xxxxxxx> (0x6AE53DCC)
> *** Signed: 7/25/2004 11:50:56 AM
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>
> DNS Aliasing (or more commonly referred to as "Round Robin
> DNS") provides no
> failover what-so-ever. If you need failover, you will need
> NLB (either the
> MS product or a hardware device).
>
> Chris
>
>
> ________________________________
>
> From: thin-bounce@xxxxxxxxxxxxx
> [mailto:thin-bounce@xxxxxxxxxxxxx]
> On Behalf Of Frank Monroe
> Sent: Saturday, July 24, 2004 2:43 PM
> To: 'thin@xxxxxxxxxxxxx'
> Subject: [THIN] Re: Redundant Web interface for PNAgent
>
>
> Build two web servers with pnagent and then set your
> dns alias for
> pnagent to point to both IP addresses. You can also use network
> load balancing.
>
> -----Original Message-----
> From: King, Jesse [mailto:JKing@xxxxxxxxxxxxxxxxxxx]
> Sent: Thursday, July 22, 2004 9:47 AM
> To: thin@xxxxxxxxxxxxx
> Subject: [THIN] Redundant Web interface for PNAgent
>
>
> Is there a way to have fail-over web interface
> for PNAgent?
>
> Situation -
>
> 5 server farm, plus separate server running the Web
Interface admin
> where PNAgent picks up all its config information.
>
> If that separate server goes down for some
> reason, then so
> do the
> users icons....
>
> Any thoughts?
>
>
>
>
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custom-tailored solutions for each client?s mission and specific goals.
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