DOCKER--INTERVIEW

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++   ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Building a Docker image involves creating a Dockerfile, which is a text file containing instructions for Docker to build an image with the required software and configurations. Here's a step-by-step guide on how to create and build a Docker image using a Dockerfile: Create a Dockerfile: Create a new file named Dockerfile in your project directory. Open the file with a text editor or an integrated development environment (IDE). Choose a Base Image: Start your Dockerfile with the choice of a base image. A base image provides the starting point for your image. For example, to use an official Ubuntu base image: FROM ubuntu:20.04 Install Dependencies and Set Up Your Application: Use the RUN instruction to install packages, set up environment variables, and configure your application: RUN apt-get update && \   ...

 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++   Docker Tutorial for Beginners [FULL COURSE in 3 Hours] (youtube.com) ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ docker ps  docker ps -a     //  -- if you close your terminal and reopen and if you want to see which containers are available docker stop <container_id> docker start <container_id> >>> To get to the docker container termial  docker exec -it <container_id> /bin/bash OR  docker exec -it <container_name> /bin/bash >>> docker creates its own isolated network docker network ls docker network create <network-name>  //mongo-network now to make our mongodb container and mongo-express run this  mongo-network we need to provide this network option when we run the container. Docker Compose file. docker-compose -f <file.yaml> up   or  docker-compose -f <f...

 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  Storing the Docker Images : Amazon Elastic Container Registry (ECR) +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ What is Docker? How does it differ from traditional virtualization? Explain the Docker container lifecycle. The Docker container lifecycle refers to the various stages that a Docker container goes through from its creation to its eventual termination. Docker is a platform that allows you to package, distribute, and run applications and their dependencies in isolated environments called containers. These containers are lightweight, portable, and provide consistent environments for running applications. The container lifecycle consists of the following key stages: Image Creation : The container lifecycle begins with the creation of a Docker image. An image is a read-only template that contains the application code, runtime, libraries, environment variables, and...