Archive

Archive for April, 2013

What Software-defined Networking Is and Is Not and Where It Fits

April 29th, 2013 5 comments

After server virtualization took off, virtualization became a buzzword which made it easy to get attention from market, and for startup companies, to get funding. Therefore you’ve seen many technologies claiming it’s * virtualization mostly for marketing purpose. Network virtualization is such a case. The even newer term for it is called software defined network, or simply SDN.

It’s Centralization, Really!

Categories: Cloud Computing, Virtualization Tags:

How to Avoid “127.0.0.1” in SNMP Trap With vCenter Server Virtual Appliance

April 24th, 2013 1 comment

SNMP trap provides a very useful way to monitor vSphere. You can use either GUI or vSphere API to configure up to 4 trap receivers. With that I can use alarm to monitor events or state changes.

If you use vSphere API to add SNMP receivers, you will need the OptionManager managed object. The related options you want to set are: snmp.receiver.1.name, snmp.receiver.1.port, snmp.receiver.1.community, snmp.receiver.1.enabled. There are 3 more sets with similar names but different numbers (2, 3, 4).

Categories: Virtualization Tags: , ,

A Bug with Disabling SSH Service Port in vSphere 5.1

April 23rd, 2013 6 comments

While playing vSphere API last week, I got into an issue that I cannot disable the SSH server with Firewall APIs (see HostFirewallSystem). The following call would throw an exception:

hfs.disableRuleset(“sshServer”);

There are many other different services like “sshClient” whose ports can be enabled and disabled via the API. As a nice surprise, they all work just fine.

Categories: vSphere API Tags:

UI Extensibility of System Center Virtual Machine Manager, Compared with vSphere

April 17th, 2013 4 comments

To my curiosity, I attended the session “Building UI Add-ins for System Center 2012 SP1 Virtual Machine Manager” by Jonobie Ford, who is the program manager of the add-in SDK. As you may know, I wrote several docs on vSphere Client plug-in and helped many partners to develop their plug-ins during my days at VMware.

Categories: Virtualization Tags: , ,

A Quick Hack to Database Failure in vCenter Appliance

April 14th, 2013 2 comments

After playing with the vCenter appliance simulator feature documented by William, I got into a show stopper that vCenter service (VPXD) could not be started. I don’t think it’s related to the simulator feature at all. My guess is that it’s caused by a sudden power off of the virtual machine but didn’t try to reproduce the problem that way – I care more to fix it than anything else.

Microsoft Management Summit 2013: Hyper-V vs. vSphere, AWS, Hands On Labs

April 11th, 2013 6 comments

I flew to Vegas this week for Microsoft Management Summit 2013, which happens to be in the same hotel (Mandalay Bay) as VMware Partner Exchange one and half months ago. The organizations and activities of both conferences are pretty similar – keynotes, breakout sessions, hands on labs (HOL). It’s pretty exciting to learn new technologies and meet new people.

Hands On Labs