Understanding Primary Terminologies Of Virtual Machine

Hypervisor: The hypervisor (i.e. software layer) is creating and managing the virtual machines in the environment of physical host machine. It is the core of the virtual computing architecture that employs abstraction and virtualization of underlying physical resources such as CPU, memory, storage, and internet access, which enables multiple guest operating systems to run simultaneously on the same physical machine. Hypervisors come in two main types: In type 1 hypervisors run on bare-metal hardware behind the scenes, while in type 2 hypervisors a host operating system lies approximately the way they work.

Virtual Network Interface: An inside network interface is a program that allows a VM to scramble a host machine and handle network connections between the virtual environment and the host. It is has the same functionality of an other NIC which connect external networks and services. Network automation addresses a wide range of deployment and day-to-day operational problems. Virtual network interfaces are defined with IP addresses, subnet masks and other network settings, enabling VMs to communicate with each other but also with external resources which are not part of the virtualized environment.

Guest Operating System: In this case, the guest operating system is the operating system inside the virtual machine while the host operating system is in charge of running the virtual machine. It acts autonomously and does not depend on the host operating system. Its constitute of its own kernel, file system, and user space environment. The OS producing the guest could be any operative framework of the kind, for example, Linux, Windows or OS X, and it is an attribution of the user’s choice of OS.

Virtual Disk: A virtual disk is an abstract disk image, which is filed or set of files that imitate a physical drive inside a virtual machine. It functions as a container that provides the operating system for the guest and a storage capacity for apps and data which are managed by the hypervisor storage subsystem. The size of virtual disks can be set as fixed or dynamically allocated and they can use numerous disk formats and storage technologies like VMDK for VMware, VHD for hyperviziation or qcow2 for QEMU/KVM.Practical Implications And Examples

We will be work on a case where we have more than one microservice that is included in Docker container, and these microservices should be communicating with each other. By with pooling the important property of user-defined Docker network, we can guarantee that APP containers of different levels will communicate with each other in a secure and efficient way.

In cloud-like architecture, virtualized system, in other words, VMs, are applied to divide various services or applications into separate pieces. Thus, each VM processes individually and has own OS and network configuration in it.

The focus of the modern software industry is now on the way applications are packaged, distributed, and executed with Docker and virtual machines (VMs) being the core technologies behind their accomplishments (the revolution). Whether it be using Docker or VMs, they both provide isolated operations that help run applications, but their approaches are different as shown when it comes to the issue of networking. In this post, we will attempt to unravel the complex rules of Docker networking and VM networking, by outlining the differences, major terms associated, and their practical significance.