The Odd Angry Shot

Virtualisation from the trenches

Nov 12, 2013 - 2 minute read - ESXi troubleshooting vCenter

Constant Alarm ‘Network Uplink Redundancy Lost’

It’s amazing how much is going on when you dig through logs. On this occasion I was looking at  “tasks & events” of a host and noticed a lot of network errors. Alarm ‘Network uplink redundancy lost’ on triggered an action The error was occurring every 5 minutes. This was made visual with the use of Log Insight. My new favourite tool. I couldn’t find anything wrong with this particular ESXi host, vSwitch or uplink.

Oct 28, 2013 - 2 minute read - certification

VCA Exams Worthless?

VMware released the VMware Certified Associate (VCA) exams at VMworld San Francisco 2013. These are entry level exams, below VCP, aimed at people just getting into virtualisation or not quite ready to sit the VCP exams. Bloggers are saying great things about the VCA exams. I spoke with a few people at vForum Sydney recently on the new certifications, and I’m glad I’m not the only one to have a different opinion on them.

Oct 9, 2013 - 5 minute read - certification ESXi5.0

My VCAP-DCA experience

Everyone else has done one, so I hope there’s something unique that comes out of this. The Study I made some notes as I was studying for VCAP-DCA, so these may not necessarily reflect what was on the exam. I found an awesome ESXTOP poster at vmworld.net. No idea how I hadn’t come across this before. I’d never really used esxcli much. I’d cut & paste esxcfg/vicfg lines that I’ve been hanging on to, but these commands were mainly for ESX3/4.

Sep 23, 2013 - 3 minute read - vmug vmworld

2013 September Melbourne VMUG

The September Melbourne VMUG was on this week, and it was a ripper. The agenda was set for: EMC Presentation: Continuous Availability with VPLEX – Berin Smithson VMware Presentation: What’s New in vSphere 5.5 – Greg Mulholland Building a Service Provider Cloud Offering – Arron Stebbing Coming off VMworld only 3 weeks before, we knew there was a lot of great info to pass on to the crowd, and there was a higher than average number of registrations.

Aug 21, 2013 - 1 minute read - ESXi5.0 troubleshooting vCenter

Force mount missing datastores

By accident while in Cluster Settings / Datastore Heartbeating, I noticed a datastore wasn’t available of one of the hosts. Trying to mount it from the vSphere client failed with a popup: Call “HostStorageSystem.ResolveMultipleUnresolvedVmfsVolumes” for object “storageSystem-326” on vCenter Server “vcenter” failed. The command to force mount a snapshot that is persistent has changed from ESX(i)4.x to ESXi5.0. The details are at http://kb.vmware.com/kb/1011387. Use SSH or ESXi Shell and run:

Jul 27, 2013 - 1 minute read - certification vmworld

Sit the IaaS exam for US$11

After reading the #vBrownBag IaaS study guide from @coolsport00, and exams being 75% off at VMworld, I decided to book the IaaS exam. The exam is usually US$225. I booked it using the VMworld SF 75% discount code, and thought I’d be cheeky and try and apply the VMUG Advantage 20% discount as well. It worked!  It appears to do the 20% off the ORIGINAL price of the exam.

Jul 19, 2013 - 2 minute read - splunk troubleshooting

Slope info magic number check failed

While using Splunk I noticed 1 ESX host had a huge amount of logs compared with the others in that cluster. Looking into it, every hour there were about 23,000 entries for: storageRM: Slope infomagicnumbercheckfailed.Ondisk0x0, expected0x1df5e76. There was only 1 hit on google from a twitter conversation with @northlandboy & @blomjoh asking if anyone knew what the error was. I logged an SR for it. But magically the next day, the error stopped appearing in the logs.

Jul 14, 2013 - 2 minute read - vmug

2013 July Melbourne VMUG

The next Melbourne VMUG is on Wednesday 24th July. Veeam will be there doing live demos and talking about the upcoming release of v7 of Veeam Backup & Replication. Veeam has to be the most popular (and coolest) backup application. VMware will be presenting vCAC – vCloud Automation Center. Going by the amount of submissions for VMworld on vCAC, this is going to be the next hottest thing VMware will be pushing.