Scenario: We have an Ubunutu (12.0.10) VM called btn-dnsng-v1 which was not responding on an ESX 5.0 host. It was only a test VM so not entirely important. Restart Guest wasn’t available (as VMware Tools wasnt installed) so we had to do a Reset. Upon the reset the VM stuck at 95 percent and no other operations Read More…
Category: VMware
Monitoring Storage Adapter Performance using ESXTOP
As you will see from the diagram below, this particular VMware installation is using a Software ISCSI initiator (vmhba38) Key: CMDS/s – Number of IOPS per second (READ/s + WRITE/s) and other SCSI commands such as SCSI locks, reservations, etc. These are normally nominal though compared to IOPS. MBREAD/s & MBWRTN = Self explanatory (in Read More…
Splitting IP addresses when using DIRECT external network connection in vCloud Director 5.1 ?
I wanted to split a /24 subnet into 4 IP chunks per orgVDC. Using the new sub-allocation feature in vShield Edge you can configure this so one OrgVDC can only use a specific allocated range. However, what if you have an orgVDC that has a direct internet connection (eg connecting to the Internet directly without using Read More…
Setting up iSCSI vmkernel switches and portgroups via CLI
With ESXi 5.0 you can do this via the GUI but I much prefer just using the CLI to create switches and portgroups. To start with you cant rename a vSwitch (or enter a custom name) via the GUI. This is quite annoying if you need to keep your vSwitch naming policy correct and of Read More…
PSOD PF exception 14 in world – ESXi 5.1
Scenario: We wanted to unbind a physical NIC from the iSCSI kernel on a particular host. This requires a reboot of the ESXi host. KB1030674 if anyone is interested! Caveat: We recently upgraded one of our clusters to ESXi 5.1 from ESXi 5.0 and this was the first reboot after the upgrade. On shutdown we Read More…
VCP-IaaS Exam Experience
Earlier today I passed my VCP-IasS exam. The exam is 90 minutes long and consists of 85 questions. There is survey before you begin which enquires about your experiences and competency with vCloud Director. I’m not sure if this has any weighting as to what questions you get! I already have a VCP (4&5) so Read More…
Veeam error after upgrade to ESX 5.1
Components: ESXi 5.1 , Veeam 6.5 Scenario: I upgraded all of my hosts from Esxi 5.0 to 5.1. Veeam 6.5 had been installed (upgraded from 6.1) last week and had been backing up successfully. When the job ran again as normal after ESXi 5.1 had been installed I got an error on all my VMs Read More…
Cannot telnet locally to MSSQL Port 1433 (2005 Standard Edition)
OS: Windows 2008 R2, SQL 2005 Standard Edition, vCenter 5.0 Scenario: I was upgrading from vCenter 5.0 to vCenter 5.1a. The SSO installation failed as it could not connect to the local SQL database. Caveat: I had upgraded from SQL2005 Express to standard on the same server as our vCenter inventory had grown too big Read More…
FreeBSD clock frozen
OS : FreeBSD 8.2 Hypervisor: VMware ESXi 5.0 The clock on our FreeBSD webserver suddenly stopped. This appears to be a bug in in ESXi 5.0. To fix this: If the time counter is using HPET then change this to ACPI sysctl kern.timecounter.hardware=ACPI-safe Note: The setting doesn't persist after a reboot so make sure Read More…
Creating a 32bit DSN for Windows 64bit
Scenario: I needed to re-create a 32 bit DSN as I was moving a VMware Update Manager database from SQL 2005 Express bundled to SQL 2008 R2 Standard on a standalone machine. To invoke the 32 bit DSN go to the following in Windows Explorer or Run box: %systemdrive%\Windows\SysWoW64\Odbcad32.exe
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