Use Paravirtualized Devices On Your Virtual Machines

This is post #13 in my December 2013 series about Linux Virtual Machine Performance Tuning. For more, please see the tag “Linux VM Performance Tuning.” para- a prefix appearing in loanwords from Greek, most often attached to verbs and verbal derivatives, with the meanings “at or to one side of, beside, side by side” ( parabola; paragraph; parallel; paralysis ),”beyond, past, by” ( paradox; paragogue ); by extension from these senses, this prefix came todesignate objects or activities auxiliary to r derivative of that denoted by the base word ( parody;paronomasia ), and hence abnormal or defective ( paranoia ), a sense now common in modernscientific coinages ( parageusia; paralexia ). Paravirtual drivers are ones where the virtualization platform does …

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VMware vCenter Server Appliance & NTP

If you’re trying to configure NTP on the VMware vCenter Server Appliance (vCSA) 5.1 builds 799730, 880472, or 947940 according to the official documentation you might be seeing what I’m seeing: vcenter:~ # yast2 ntp-client add server=0.us.pool.ntp.org Error: Cannot update the dynamic configuration policy. vcenter:~ # yast2 ntp-client enable Error: Cannot update the dynamic configuration policy. This appears to be a SuSE bug. Seems serious but it isn’t, the commands actually do complete correctly. If you want to check the work just use the command: cat /etc/ntp.conf to check for lines starting with “server” near the bottom. /sbin/chkconfig ntp on will enable the service at boot, and /etc/rc.d/ntp start will start it immediately if it isn’t started. /usr/sbin/ntpq -p will …

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Install the nano Editor on the VMware vMA 5

The VMware vSphere Management Assistant (vMA) is a handy appliance for interacting with your environment via the Linux command line. I use it a lot, and I’m starting to get more of my team to use it. The problem is that it only ships with the vi text editor, which, described politely, is sort of arcane. Being a UNIX guy I’m used to it, but for others that just want to edit a file it’s overkill. For those situations I like nano, a simple open source editor. To install it on the vMA issue the command: sudo zypper install nano If you’re prompted for a password use the one you set for vi-admin (or whoever you’re logged into the vMA …

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