clarify minor inconsistencies in rack layout diagram

[chaos@bbn.com]

In using the rack layout diagram at ​https://wiki.exogeni.net/doku.php?id=public:hardware:rack_layout, to label our rack, I found a few minor inconsistencies:

• Our iSCSI is mounted at U25-U26, where the diagram shows U24-U25. Is this an error in the diagram or an error in our rack? If the latter, should it be fixed, or just noted as a footnote on the rack diagram or elsewhere?
• The SSG5 is not shown in that diagram. It's not rackmounted, but it is a networked device in the rack, so i think it would be good to note it so people can tell from the diagram what it is.
• No hostnames are given in the layout page for the iSCSI array, the SSG5, or the console. Of those, i think the iSCSI array and the SSG5 actually have hostnames (since they are networked), so we should agree on what they are.

These are minor, but please get back to me on them so i can close out EG-ADM-1 step 4A.

[viviano@renci.org]

iSCSI location is correct at BBN. I've adjusted the rack diagram on the WIKI

I've added an entry for the SSG5. The detailed Visio Diagrams will have a better picture when they are done and posted.

iSCSI does not have a host name. It is accessed via private range IP addresses. The management software for the iSCSI array, Santricity, doesn't understand DNS names, just IP's. The link to the iSCSI documentation on the WIKI lists the addresses and steps that should be used to assign a LUN on the headnode. We'll be adding more documentation and screen shots of Santricity showing the steps to configure and layout LUN's when we bring the UH rack online.

[chaos@bbn.com]

Thanks, Brad. Re iSCSI hostname: are you planning to do DNS on the private subnets at all, or just track all of those IPs via /etc/hosts and wikis? Regardless, i could imagine that, say, bbn-hn would refer to the BBN iSCSI by some name, even if that name wasn't known to the iSCSI itself: anyway, it doesn't really matter. It sounds like i can label our box bbn-iscsi, and no one else is going to contradict me on that.

Also: it looks like bbn-ssg.exogeni.net is not in DNS, though rci-ssg.exogeni.net is. Should it be?

[chaos@bbn.com]

Ah, i realised putting bbn-ssg (a public IP) in DNS is actually part of 11, so i'll move that comment there. Sorry, long week.

[viviano@renci.org]

Replying to chaos@bbn.com:

Thanks, Brad. Re iSCSI hostname: are you planning to do DNS on the private subnets at all, or just track all of those IPs via /etc/hosts and wikis? Regardless, i could imagine that, say, bbn-hn would refer to the BBN iSCSI by some name, even if that name wasn't known to the iSCSI itself: anyway, it doesn't really matter. It sounds like i can label our box bbn-iscsi, and no one else is going to contradict me on that.

Also: it looks like bbn-ssg.exogeni.net is not in DNS, though rci-ssg.exogeni.net is. Should it be?

Everything is on a private network range and each ExoGENI rack will use the same range for iSCSI. That information is already documented in the iSCSI setup section of the ExoGENI WIKI.

[chaos@bbn.com]

I think this can in fact be closed. I'll open a new ticket for any further DNS questions i have. Thanks.