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Virtualization for PaaS: Asset or Liability?

Steve Jin — Tue, 14 May 2013 06:06:35 +0000

During the Microsoft Management Summit last month, I had an interesting chat with Rakesh Malhotra who is the VP product of Apprenda. It made me to think more about two important technologies: virtualization and PaaS. As we know, virtualization is almost a must for IaaS. Will it be the same case for PaaS? Pure PaaS or [...]

Virtualization for PaaS: Asset or Liability? originally appeared on DoubleCloud by Steve Jin, author of VMware VI and vSphere SDK (Prentice Hall) and creator of VMware vSphere Java API. Follow Steve on Twitter and receive future articles via RSS or Email.

Can The Success of Server Virtualization Be Repeated in Networking?

Steve Jin — Mon, 06 May 2013 13:30:02 +0000

The software-defined networking is the new buzzword for network centralization, which is also known as OpenFlow or network virtualization. The idea is to centralize the control to a server (or a cluster of servers) called controller. With the acquisition of Nicira by VMware, the software-defined networking has caught many eyeballs from the community. From there, [...]

Can The Success of Server Virtualization Be Repeated in Networking? originally appeared on DoubleCloud by Steve Jin, author of VMware VI and vSphere SDK (Prentice Hall) and creator of VMware vSphere Java API. Follow Steve on Twitter and receive future articles via RSS or Email.

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

Steve Jin — Mon, 29 Apr 2013 05:01:36 +0000

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, [...]

What Software-defined Networking Is and Is Not and Where It Fits originally appeared on DoubleCloud by Steve Jin, author of VMware VI and vSphere SDK (Prentice Hall) and creator of VMware vSphere Java API. Follow Steve on Twitter and receive future articles via RSS or Email.

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

Steve Jin — Wed, 24 Apr 2013 05:01:01 +0000

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 [...]

How to Avoid “127.0.0.1” in SNMP Trap With vCenter Server Virtual Appliance originally appeared on DoubleCloud by Steve Jin, author of VMware VI and vSphere SDK (Prentice Hall) and creator of VMware vSphere Java API. Follow Steve on Twitter and receive future articles via RSS or Email.

A Bug with Disabling SSH Service Port in vSphere 5.1

Steve Jin — Tue, 23 Apr 2013 06:30:15 +0000

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 [...]

A Bug with Disabling SSH Service Port in vSphere 5.1 originally appeared on DoubleCloud by Steve Jin, author of VMware VI and vSphere SDK (Prentice Hall) and creator of VMware vSphere Java API. Follow Steve on Twitter and receive future articles via RSS or Email.

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

Steve Jin — Wed, 17 Apr 2013 05:01:35 +0000

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. It turned [...]

UI Extensibility of System Center Virtual Machine Manager, Compared with vSphere originally appeared on DoubleCloud by Steve Jin, author of VMware VI and vSphere SDK (Prentice Hall) and creator of VMware vSphere Java API. Follow Steve on Twitter and receive future articles via RSS or Email.

A Quick Hack to Database Failure in vCenter Appliance

Steve Jin — Sun, 14 Apr 2013 22:26:26 +0000

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 [...]

A Quick Hack to Database Failure in vCenter Appliance originally appeared on DoubleCloud by Steve Jin, author of VMware VI and vSphere SDK (Prentice Hall) and creator of VMware vSphere Java API. Follow Steve on Twitter and receive future articles via RSS or Email.

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

Steve Jin — Thu, 11 Apr 2013 18:57:38 +0000

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 [...]

Microsoft Management Summit 2013: Hyper-V vs. vSphere, AWS, Hands On Labs originally appeared on DoubleCloud by Steve Jin, author of VMware VI and vSphere SDK (Prentice Hall) and creator of VMware vSphere Java API. Follow Steve on Twitter and receive future articles via RSS or Email.

GIT Commands Using Java APIs

Steve Jin — Tue, 26 Mar 2013 06:13:57 +0000

In previous posts, I’ve covered an Java API called JGIT for working with GIT. Besides the low level APIs, JGIT also supports high level command line like interfaces. If you know how to use the GIT command line, you can use the APIs. Note that it’s different from calling GIT commands or any other commands [...]

GIT Commands Using Java APIs originally appeared on DoubleCloud by Steve Jin, author of VMware VI and vSphere SDK (Prentice Hall) and creator of VMware vSphere Java API. Follow Steve on Twitter and receive future articles via RSS or Email.

How to Use the Missing Virtual Network Editor in VMware Player

Steve Jin — Wed, 13 Mar 2013 05:01:57 +0000

For most people who use the VMware Player, DHCP is good enough for the NAT network. That means the IP addresses of your virtual machines may change after each powering on. What if you want to have static IP addresses? It’s pretty easy as long as it’s in the same subnet. For example, if the [...]

How to Use the Missing Virtual Network Editor in VMware Player originally appeared on DoubleCloud by Steve Jin, author of VMware VI and vSphere SDK (Prentice Hall) and creator of VMware vSphere Java API. Follow Steve on Twitter and receive future articles via RSS or Email.

Configure Static IP Address on Linux VM in VMware Player

Steve Jin — Tue, 12 Mar 2013 05:01:58 +0000

If you run VMware Player, you would have 3 networking options for virtual machines running there: Bridged, NAT, Host-Only. In the latest 5.0.1, I also found a new one: LAN Segment. This blog has a nice explanation on these three settings if you want to get more details. In most of cases, I use NAT [...]

Configure Static IP Address on Linux VM in VMware Player originally appeared on DoubleCloud by Steve Jin, author of VMware VI and vSphere SDK (Prentice Hall) and creator of VMware vSphere Java API. Follow Steve on Twitter and receive future articles via RSS or Email.

MiniNet: A Starting Point to Software Defined Network

Steve Jin — Mon, 11 Mar 2013 05:01:54 +0000

While reading Michael White’s newsletter (a weekly digest regarding VMware technology that I find very useful and read regularly) a while back, I came to know a small emulator tool for SDN called MiniNet (http://mininet.github.com/). I got a little time to read and play with it over the weekend and though it’s worthwhile to share [...]

MiniNet: A Starting Point to Software Defined Network originally appeared on DoubleCloud by Steve Jin, author of VMware VI and vSphere SDK (Prentice Hall) and creator of VMware vSphere Java API. Follow Steve on Twitter and receive future articles via RSS or Email.

Generating Checksum on Windows

Steve Jin — Mon, 04 Mar 2013 05:01:00 +0000

I got an interesting request from one of the enterprises which uses vijava in their product. Although there are downloads for binary and source packages on the sourceforge Web site, they still would like me to create the checksum as I am the trustable source for that. As I was told, the checksum is required by [...]

Generating Checksum on Windows originally appeared on DoubleCloud by Steve Jin, author of VMware VI and vSphere SDK (Prentice Hall) and creator of VMware vSphere Java API. Follow Steve on Twitter and receive future articles via RSS or Email.

VMware Partner Exchange 2013: Observations and Thoughts

Steve Jin — Sun, 03 Mar 2013 19:12:31 +0000

I went to the VMware Partner Exchange in Las Vegas last week. It’s always nice to see old friends and colleagues in the conference that I’ve been attending consecutively since I first joined VMware in 2007. I spent quite some of my time in the hands on labs (codenamed Project NEE), which turned out to [...]

VMware Partner Exchange 2013: Observations and Thoughts originally appeared on DoubleCloud by Steve Jin, author of VMware VI and vSphere SDK (Prentice Hall) and creator of VMware vSphere Java API. Follow Steve on Twitter and receive future articles via RSS or Email.

Running Puppet in Client/Server Mode

Steve Jin — Thu, 21 Feb 2013 04:14:33 +0000

In my last post, I introduced how to run a very simple HelloWorld script with Puppet 3.1.0 on CentOS 6.3. Although it shows how Puppet works, it’s not really how Puppet is used in real world. To get the most out of Puppet, you want to run the client/server mode where you have a master [...]

Running Puppet in Client/Server Mode originally appeared on DoubleCloud by Steve Jin, author of VMware VI and vSphere SDK (Prentice Hall) and creator of VMware vSphere Java API. Follow Steve on Twitter and receive future articles via RSS or Email.

Running Puppet HelloWorld on CentOS 6.3

Steve Jin — Wed, 13 Feb 2013 04:59:09 +0000

Puppet is a very well-known configuration management tool that has been adopted by many enterprises and service providers. VMware recently invested $30M in Puppet Labs, the company behind it. It’s clear that VMware needs such a tool if it wants to grow in data center space. I actually got a book from last year’s PuppetConf [...]

Running Puppet HelloWorld on CentOS 6.3 originally appeared on DoubleCloud by Steve Jin, author of VMware VI and vSphere SDK (Prentice Hall) and creator of VMware vSphere Java API. Follow Steve on Twitter and receive future articles via RSS or Email.

How to Use GIT Java APIs to Diff Two Different Files

Steve Jin — Mon, 11 Feb 2013 13:08:06 +0000

In my previous post, I introduced a sample showing how to use JGIT Java APIs to diff two versions of a same file in repository. The JGIT Java APIs can do more than that – it can actually diff two text files that are not even controlled by GIT. Here is a short sample code [...]

How to Use GIT Java APIs to Diff Two Different Files originally appeared on DoubleCloud by Steve Jin, author of VMware VI and vSphere SDK (Prentice Hall) and creator of VMware vSphere Java API. Follow Steve on Twitter and receive future articles via RSS or Email.

How to Use GIT Java APIs to Diff Different Versions

Steve Jin — Mon, 04 Feb 2013 04:17:11 +0000

Last week I introduced the JGIT Java API with a simple sample illustrating how to read content from HEAD. If you have multiple versions of a source code or text file, you may want to see their differences. An easy tool for this is the standard diff. The JGIT Java API has built-in support for [...]

How to Use GIT Java APIs to Diff Different Versions originally appeared on DoubleCloud by Steve Jin, author of VMware VI and vSphere SDK (Prentice Hall) and creator of VMware vSphere Java API. Follow Steve on Twitter and receive future articles via RSS or Email.

How to Read GIT Repository Using Java APIs

Steve Jin — Mon, 28 Jan 2013 04:17:45 +0000

GIT is a source code control system created by Linus and others for managing Linux kernel development. It becomes one of the most popular version control systems especially in the open source community. Most developers use command line or the plugins to IDEs like Eclipse, NetBeans. I think even Microsoft VisualStudio has add-on for connecting [...]

How to Read GIT Repository Using Java APIs originally appeared on DoubleCloud by Steve Jin, author of VMware VI and vSphere SDK (Prentice Hall) and creator of VMware vSphere Java API. Follow Steve on Twitter and receive future articles via RSS or Email.

Simple Logging in Java Application

Steve Jin — Tue, 22 Jan 2013 04:37:17 +0000

Logging is a common requirement for application. In Java world, there are a few frameworks, the first and the most famous of which is the log4j from Apache foundation. Java included its own logging APIs afterwards. You can find many discussions which one is better in terms of use of use, flexibility, and performance. To reconcile [...]

Simple Logging in Java Application originally appeared on DoubleCloud by Steve Jin, author of VMware VI and vSphere SDK (Prentice Hall) and creator of VMware vSphere Java API. Follow Steve on Twitter and receive future articles via RSS or Email.