Archive for July, 2007

Cluster completely online

July 26th, 2007

I have all three nodes online now. iPrint is running. I’m beginning to start the GroupWise migration. I’ve got a test PO that will migrate properly from node to node. I plan to start moving live POs to the cluster next week. 1 domain will come over after that to a different resource.

During my install process and reading docs, I came across TID 3839149 and saw this in the environment section about iScsi; Poor man’s SAN. A little humor in a technical doc is always appreciated.

Cluster, ZenWorks imaging, air conditioning, OpenSUSE

July 19th, 2007

After lots of trial, error, and reading, I’ve finally gotten our Novell cluster online.

Just to clarify, no, the cluster isn’t called totally_sweet_cluster, although that would be totally sweet. Right now it’s just two nodes(Dell PowerEdge 1950) running iScsi initiator and one server(Dell PowerEdge 2950) running as the iScsi Target. I have one extra 1950 that I still need to install NetWare on and configure. I’m working on getting the proper cluster licenses so I can install the extra node as OES only gives you licenses for two nodes out of the box.  I will play with the service migration tomorrow assuming I have the time.

We’re moving forward with our imaging.  Multicast imaging with ZenWorks is a huge benefit for us.  It even saves the computer name and ip address so we don’t have to manually configure that on each machine when we image a lab.  Once the summer is over, I need to sit down and figure out how to build a Zen image disk, specifically how to upgrade the kernel and initrd in the ISO.  Until then, http://www.zenimaging.info is a great site to grab up to date zen ISOs and PXE related software.

The air conditioner in our server room has been faltering.  It’s a rather large dedicated unit so it should have no problem handling the heat our servers generate.   However, the temperature in the room would swing by a matter of 10 degrees F from 70 degrees to 80 degrees in half an hour or less.  Lately it has been acting far worse.  Twice yesterday the room hit 90+ degrees.  Obviously, that’s not good.  Thanks to our facilities department, the problem was discovered and fixed.  It was sitting around 70 degrees when I left.  I’m hoping the issue is solved.  A hot data center isn’t a good environment, especially when you’re looking to add more servers.

Finally, here’s an obligatory Linux screen shot.  I’ve been trying to use my OpenSUSE install as much as possible lately. ;)

More Sophos, 24 hours to worry about

July 12th, 2007

After going back and forth with the Sophos support department, I think I finally nailed my ongoing issue. My problem was that I couldn’t authenticate to my NetWare servers to create an area for updates for both the NetWare servers themselves and our Windows workstations/servers. It finally dawned on me that I screwed something up during the initial install, thanks in part to the documentation. During the install, the documentation deviated with what I was actually seeing on screen. The docs wanted a user called EMLibUser1 on both the local management machine and a matching user with the same details in eDirectory. When I finished the install, I took a look at the local windows users created. The install automatically created a user called SophosEMLibUuser1. To match my eDirectory user, I went ahead and renamed that user instead of my eDirectory user so they would match. Apparently, there is a section in the Sophos Library Manager MMC that specifies what user it’s going to use on the local machine to handle remote CIDs. Once I changed that to EMLibUser1 and restarted all the services, I was finally able to authenticate to my NetWare servers. See, this is what happens when I bother reading the documentation BEFORE I bumble my way into installing something!

One major thing that has changed since I went from desktop support to system/network administration is that I now think about my work day in terms of 24 hours. With my last position, once my day was over, it was over. These days, I can’t exactly down a server for maintenance in the middle of the day and only impact a single person. Server work happens at night, during weekends, and during maintenance days made known to the users well in advance(and reminded many times). Thankfully, I don’t work in an environment where losing a server at 7:00 pm will cause money to be lost. At worst, a short term outage causes complaining and my phone ringing off the hook.

The 24 hour thought process comes into play when I need to do work on a server and I have to start worrying about the backup processes running and how many hours the maintenance might take. If I know it’s going to take four hours or so, I’d prefer not to tack that on the end of my day. I’m more likely to make a mistake 11 hours into a work day than 3. So either I come in late or come in during the weekend. Even then, I have to make sure there are no night classes, no board meetings, and nobody who determines my yearly raises around when I start pulling plugs. It’s a different dynamic than I was previously used to.

Sophos, cluster

July 9th, 2007

We got our Sophos Virus scan licensing info today so I started getting it installed. I’m installing the Enterprise Console on a Server 2003 box. It’s supposed to download updates and drop them on one of the NetWare servers if I’m following the documentation correctly. However, it’s unable to authenticate to my NetWare server. So I have a server call into the company. Hopefully I can get it sorted tomorrow so I can roll this out and check it off my list of things to do.

We received the first couple pieces for the iSCSI cluster. We got the device which will act as the iSCSI Target(SAN). Sitting in another office is also a boxed up Cisco Catalyst 2560G switch which will act as the interconnect device. I’m still waiting on the three iSCSI initiator nodes. However, I probably won’t get to this project until next week, given the work load I need to deal with first.