docker and vm glossary

namespace = used for isolating one docker container  with other

// fungsi :

restrict container access and visibility

to other resources on system

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docker images :

lightweight, standalone, executable packages that include everything u need to run a piece of software

^ code for software, runtime, system tools and library  

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docker file :

- simple document that provide instruction for creating image

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docker container :

- instances of images that run in the docker engine 

^ tiap container terisolasi dan cuma memiliki environtment that includes only the necessary components.

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klo di vm ada hypervisor type 1 // baremetal 

- run directly on host hardware 

ada jg hypervisor type 2  // hosted hypervisor

- run directly on top of an existing operating system

virtual hardware :   - emulated components of a VM

terdiri dari virtual cpu, virtual memory, virtual storage, virtual network interfaces 

hypervisor responsibility is for managing and allocating these virtual resources to each VM

guest OS = individual OS that run inside each VM 

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vm use case :

- diverse operating system on 1 physical hardware 

- 1 running linux, 1 running windows

- isolation  // separate kernel and separate OS

- suited for running legacy aplication that rely on specific OS Version / configuration

docker use case :

- ideal for microservices 

- fast startup times 

- ability to package and distribute dependencies

- rapid development and deployment. ability to use docker container to quickly build deploy and scaleup

- smaller footprint than vm / resource efficiency  == more container able to run on the same piece of hardware with less overhead