I’ve been doing a lot of Nagios deployments recently, and this error always bites me, on all Ubuntu versions, including Hardy and Intrepid (haven’t quite bit the bullet to try the Jaunty beta yet 🙂 )
<br /> Error: Could not stat() command file '/var/lib/nagios3/rw/nagios.cmd'!
The external command file may be missing, Nagios may not be running, and/or Nagios may not be checking external commands.
An error occurred while attempting to commit your command for processing.
For lunch today we all decided to go to the Mash Tun pub. I argued blind that they didn’t do any food, but it turns out, fortunately, that they did!
I had a most fantastic burger, which was almost the size of my pint glass. The patty was really nicely flavoured, with onions and green bits and all sorts, and not over blown with pepper, which seems to be the norm nowadays. The chips were also really good, a lot of places seem to be mimicking the style of Heston’s Thrice Cooked Chips!
Mucking about with LVM and partitions isn’t really taxing, it’s all well documented. Trusting it however is a different matter. I’ve resized loads of Ext3 LVM partitions in the past, but was asked to resize a ReiserFS one today, which made me ask the question:
“Is there anything writing to it currently, as I will have to unmount it first ..”
Wrong assumption, or so says the guy sat next to me! ReiserFS can be dynamically resized on the fly! Woohoo says I, lets have a look at the resize_reiserfs man page!
I’m really trying to get in to this whole Java web development frame of mind, as it’s a bit of fun, a bit of a giggle, and it’s massive in this area of the world! So obviously my first port of call was dusting off Eclipse and kicking out a HelloWorld style Java servlet!
I grabbed a copy of O’Rielly’s Java Servlet Programming to get started and found it really invaluable, and definitely recommend this book to anyone starting out in Java servlet programming.
I’m trying out this Continuous Integration fun at the moment.
My end game is to get Hudson, Maven and Nexus working together to continuously build and run unit tests against code, which then gets turned in to Deb packages. A new Xen VM will then be created and configured using Puppet which the new Deb package is then deployed to. Finally Selenium will then be run to automate testing of the deployment.
Thats the plan anyway ..
I recently had to learn BGP in order to fully understand what I was doing when migrating from our Linux based Zebra routers (crappy and unstable) to our nice shiny new Juniper routers.
We had a couple of books at work, but by far the best was BGP: Building Reliable Networks with the Border Gateway Protocol. It hasn’t changed much since it was released in 2003, but neither has BGP so that really isn’t an issue, and with the recent BGP issues that keep occuring, a good knowledge of it is pretty important to any network admins out there, especially those like me with their own AS numbers!
I got this annoying SVN error today, that I hadn’t come across before. Even after resolving the conflict in the file, highlighted by lots of «««<, I still couldn’t get my commit to work!
idimmu@boosh:~/work/systems/trunk/dns$ svn ci idimmu.net -m “new funky domain”
svn: Commit failed (details follow):
svn: Aborting commit: ‘/home/rus/work/systems/trunk/dns/idimmu.net’ remains in conflict
After some reading it was easy to resolve!
idimmu@boosh:~/work/systems/trunk/dns$ svn resolved idimmu.net
Resolved conflicted state of ‘idimmu.net’
I had a crazy weird bug today whilst running Puppet on one of our CentOS boxes where no packages were being installed. A quick investigation with yum yielded the following scenario!
Id I tried to use yum as root or with sudo it gave the following error ..
<br /> [idimmu@server ~]$ sudo yum check-update<br /> rpmdb: Lock table is out of available locker entries<br /> error: db4 error(22) from db->close: Invalid argument<br /> error: cannot open Providename index using db3 - Cannot allocate memory (12)<br /> Repository update is listed more than once in the configuration<br /> Repository base is listed more than once in the configuration<br /> Setting up repositories<br /> https://www.mirrorservice.org/sites/mirror.centos.org/Null/updates/i386/repodata/repomd.xml: [Errno 14] HTTP Error 404: Not Found<br /> Trying other mirror.<br /> Cannot open/read repomd.xml file for repository: update<br /> failure: repodata/repomd.xml from update: [Errno 256] No more mirrors to try.<br /> Error: failure: repodata/repomd.xml from update: [Errno 256] No more mirrors to try.<br />
I managed to screw up my home machine when upgrading from Dapper to Hardy somehow, so decided to flatten and reinstall Hardy from scratch.
This is all well and good but I have a RAID 5 array on my machine which stores all my important documents and stuff (I really hate drive failure). Ubuntu didn’t suddenly detect my RAID array and figure everything out, which was not entirely unsurprising but was a little scary.