deVops pathshala Blog – Notes for Me & You

  Subscribe YouTube Channel @devops-pathshal a   1. What is Docker ? Ans:- Docker is a platform that allows you to package an application and all its dependencies into lightweight portable containers. 2. What are Containers ? Ans:- Containers are lightweight, isolated environment that package an application along with all dependencies so it run consistently on any system. 3. What is the difference between a container and a Virtual Machine ? Ans:- Containers are lightweight because they share the host operating system, while virtual machine are heavy because they run their own full operating system. Containers start very quickly, use fewer resources and are ideal for microservices. Virtual machines provide stronger isolation but require more RAM and CPU since each VM containers a full OS. So overall, containers are fast and efficient, whereas VMs are heavier but more isolated. 4. What are docker engine ? Ans:- Docker Engine is the core component of  Docker that runs and ma...

  Subscribe YouTube Channel @devops-pathshala                                               Docker Networking  Docker networking is the way Docker containers communicate with each other, with the host system, and with the outside world (like the internet). Since containers are isolated by default, networking allows them to exchange data and services in a controlled and flexible manner. 1. Why Docker Networking is Needed Each container has its own isolated environment, including its own network stack. To allow communication between: Containers on the same host Containers across different hosts Containers and the external world (internet) Networking also allows services to be exposed securely to the outside. 2. Types of Docker Networks Docker provides several built-in network types: Network Type Description Use Case Bridge Default network for ...

                                                                    Docker Image Management  A docker image is a read only blue print used to create containers. It contains the application code, dependencies and environment required to run the containers.                                              Image vs Container  Feature Docker Image Docker Container Definition Read-only template used to create containers  Running instance of a Docker image State Static (does not change) Dynamic (changes during runtime) Purpose Used to build containers Used to run applications Mutability Immutable (cannot be modified) Mutable (can be modified) Storage Stored on disk Runs in memory + disk Creation Creat...

  What is Docker ? Docker is a platform that allows you to package an application and all its dependencies into lightweight, portable containers. Why use Docker ? Docker simplifies application deployment by packaging everything into lightweight portable containers. What is the difference between a container and a VM(Virtual Machine)? Containers are lightweight because they share the host operating system , while Virtual machines are heavy because they run their own full Operating System. Containers start very quickly , use fewer resources and are ideal for microservices . Virtual machines are provide stronger isolation but require more Ram and CPU since each VM containers a full OS. So overall, containers are fast and efficient , whereas VMs are heavier but more isolated. What is Container ? Containers are lightweight, isolated environments that package an application along with all its dependencies so it run consistently on any system. They share the Host OS kernel , so they ar...