This content originally appeared on DEV Community and was authored by Stacksjar
What are Docker Containers
To comprehend what Docker is and why it is utilized, we should initially know what containers are and what issues do they settle. Containers are totally isolated environments that are set up on top of a current working framework to give a virtual partition to the application running inside it from the rest of the world.
What's more, docker is a product that assists us with controlling the lifecycle of these containers. Try not to stress excessively on the off chance that you can't get it. We should take a basic regular daily life example to assist you with getting the idea of containers.
Think about a person residing on lease in a house which he/she imparts to the property manager's family or suppose another occupant. The person has a different room, washroom, and kitchen for satisfying his fundamental requirements.
Now assuming that we believe the house to be an operating system and the area available to the tenant as a container then the tenant lives alone in his area, manages it as per his own requirements, has no interference from others but it shares some common resources of the house like electricity, water, etc.
Essentially, a container is an isolated environment(user space) set up on top of an operating system, wherein it uses a similar OS Kernel however has its own processes, services, networking, storage mounts just like a virtual machine, yet containers are not a virtual machine(We will become familiar with the contrast among VM and containers soon.).
Docker programming helps us in dealing with the lifecycle of these containers which incorporates the setup of containers, monitoring containers, obliterating containers, connecting containers to organize, and so on.
Different Ways of Creating Containers
Containerisation is an old idea as there are advancements that empower container setup and have been in need for over a decade. Another ways of making containers are:
LXC
LXT
LXCFS and so on.
Docker was made on top of LXC at first however, later on, moved on to its own particular manner of making containers. According to the LXC approach, containers are established as segregated environments on top of a Linux kernel utilizing cgroups(control groups) for asset management like CPU, memory, network, and so on and confined namespaces to make a different client space for running applications for an alternate compartment.
Indeed, the container is an old idea and yes we can make containers utilizing a Linux Kernel on the grounds that main Linux offers help for cgroups and namespaces.
As far as possible how much a container can utilize, though namespaces limits how much a container can see.
Check out other articles in this series: Docker Tutorials
1) Introduction to Docker and Docker Containers
2) Ultimate Comparision between Docker Containers vs Virtual Machine
3) Complete Setup to Install Docker
4) Hello World Program in Docker
5) 3 Simple Steps to Deploy on Docker
This content originally appeared on DEV Community and was authored by Stacksjar
Stacksjar | Sciencx (2022-04-12T14:43:39+00:00) Introduction to Dockers. Retrieved from https://www.scien.cx/2022/04/12/introduction-to-dockers/
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