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Nesting RHEL7 KVM on VMware Workstation 12

Recently I wished to build a Red Hat Enterprise Linux 7 (RHEL7) appliance with 2 KVM-virtualized guests. Essentially a type 2 hypervisor (VMM) on top of another type 2 hypervisor. I installed RHEL7 on VMware Workstation 12 and configured it as a Virtualization Server. It was a smooth install without any issues. However I was surprised to find that KVM (Kernel-based Virtual Machine) simply did not work at all and lsmod did not even list the KVM kernel modules. It turns out that you need to do two changes to your RHEL7 guest configuration file in order for KVM support

OSv – Designed for the Cloud

This blog is mostly about Linux-related topics but from time to time covers interesting other OS-related technology. One such interesting new technology is OSv, which was designed from the ground up to execute a single application on top of a hypervisor, resulting in superior performance and effortless management. Developed by a number of the initial developers of KVM, including Avi Kivity, OSv was designed to give near-hardware level access efficiency for Java VMs. OSv also reduces the memory and CPU overhead imposed by traditional OSes. Evidently ZFS is the default filesystem. Interestingly, OSv is implemented in C++, using templates, which