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Keeping your infrastructure up-to-date is one of the crucial tasks of day to day operations of every system administrator. Path management and compliance checks of the environment is usually long run and unfortunately not every environment is patched periodically. There are several major results of un-patched environment Missing security patches that might lead into compromising […]

If you ever designed larger infrastructure projects, you might already know that cabinet size is not the only limitation for your infrastructure. There are other huge factors as well and probably the biggest is power limitation of the cabinet itself. Either if you are running your own DC room or you rent cabinets in existing […]

My application is running slow, hey IT guy, can you check that and make sure you fixed it! How many times have you heard such complain? I bet that it is quite common. In this series I would like to talk about common performance issues you might see within your environment and today we will […]

PowerCLI was around for years. At the beginning VMware used name vSphere PowerCLI but over the years more and more modules ware added to support not only vSphere but other products. So, with this release the name changed to VMware PowerCLI. PowerCLI is a strong automation tool allowing you to manage your vSphere environment with […]

Sometimes it might happen that default installation image do not contain all necessary software packages you would like to install directly with the ESXi server itself. There are several use-cases for using custom ESXi installation image. Either you are using some specific drivers that are not included in the base installation itself and you can’t […]

Many of us have still doubts how to handle traffic like VMotion or iSCSI. Should I use L2 and connection or can I route such traffic over L3? In the past VMotion over L3 was not officially supported, but it worked as well. From vSphere 6.0 new feature called custom TCP/IP stack was introduced. With […]

For those of you who prefer reading books I have a great news! O’Reilly announced several dozens of free books related to multiple topic recently. They are not focused on VMware directly but there are more focused on general cloud principles. Free WebOps & DevOps Ebooks Few selected books that might be handy for you […]

Sometimes you need to run your ESXi server in evaluation mode for longer time then standard 60 days. It might be because of extensive testing or your project gets into the delays. Fortunately, there is a way how to reset the license back to day 0 without losing the configuration and existing virtual machines. Whole […]

Today many companies are deploying infrastructures based on Metro Cluster (also known as Stretched Cluster). This approach is getting more and more popular since it eliminates possible downtime when one of the datacenters goes offline. Basically with Metro Cluster your workload is actively served from both locations simultaneously and those locations are quite close (that’s […]

Today we will talk about lockdown mode. Although lockdown mode has been around for several years not many people are actually using that feature either because they do not even know that it exists or because the is not that many articles about it. I have to say that I have not been using lockdown […]