What and Why CoreOS is a lightweight Linux distribution and container ready Operating system Created in 2014 by Ales Polvi, Brandon Philips, Michael Marineau and Greg Kroah-Hartman based on a fork of Google Chrome source code. CoreOS is meant to more rapidly fill security holes that plague servers while speeding evolution of hosted apps. Specifically…
Category: ARTICLE
ARTICLE
Dockerfile – Options and Structure
FROM <image> [AS <name>] <image>[:<tag>] [AS <name>] ARG VARIABLE_NAME=[value] FROM base:${VARIABLE_NAME} RUN <command> (shell form – /bin/sh –c) [“command”, “parm1”, ”parm2”] (exec form, JSON) CMD [“command”, “parm1”, “parm2”] (exec form, JSON) [“parm1”,”parm2”] (parms for ENTRYPOINT) LABEL metadata added to image, key/value pair “label details”=“label reference name” MAINTAINER (deprecated) <name of maintainer> LABEL maintainer=“name” (new format)…
Kubernetes Basics
What are Containers Container wrap software in independent , portable packages, making it easy to quickly run software in the variety of environments. When you wrap your software in a container, you can quickly and easily run it form anywhere , this makes containers great for automation. Containers are bit like virtual machines, but they…
RHEL Releases
RHEL 2.1 26 Mar 2002 RHEL 3 22 Oct 2003 RHEL 4 15 Feb 2005 RHEL 5 14 Mar 2007 RHEL 6 10 Nov 2010 RHEL 7 10 Jun 2014 RHEL 8 7 May 2019
KVM Administration
About There are several tools to manage KVM.Here we use virsh commands. virsh stands for VIrtual SHell Help The post helps you to refer the most used admin commands which we use daily. Always you can get all details by help command virsh –help Basic Operations virsh list – List only running guests virsh list…
KVM (Kernel-based Virtual Machine)
What This is the virtualization module added to Linux kernel to function as a hypervisor. KVM requires a processor with hardware virtualization extensions, such as Intel VT or AMD-V A hypervisor is a software layer installed on the physical hardware that creates and runs several virtual machines (VMs). History Avi Kivity started the development of…