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I was asked this challenging question, which was quite tricky.

It goes like this.

Say there is a clustered environment of 40 web servers and the website is unfortunately down. You are in a remote state. But you find that even the gateway is down. How will you solve this issue ?

Here, the main thing is even the gateway is down and the servers are too far from my location. Option 1 is to ask someone to check gateway. But if that option is not available, is there any way out ? I don't think so at all.

Also, to prevent such from future, what can I do in better architecture ?

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closed as not a real question by Ward, DJ Pon3, Shane Madden, Scott Pack, MDMarra Nov 13 '11 at 17:21

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. See the FAQ for guidance on how to improve it.

1 Answer

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Put two gateways on different servers, have some lights-out functionality on the two servers. If gate 1 is down, connect to gate 2 (which is for this use only, nothing else), connect to ILO/IPMI on gate 1 and get it going again.

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Have some alert system sending warnings (e-mails?) if gate 2 is down. Connect gate 1, repair gate 2. Again, ILO/IPMI if no ssh. – korkman Oct 23 '11 at 12:19
And, considering IPMIs tend to crash themselves, check their availability with that alert system, too. – korkman Oct 23 '11 at 12:20
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