How to Use Docker Containers

1. How do I run a docker container?
2. What is Docker container and how it works?
3. What is Docker container used for?
4. How do I start a docker container and keep it running?
5. How is Docker different from VM?
6. How do I run Docker locally?
7. What is Kubernetes vs Docker?
8. When should I use Docker?
9. How does a container work?
10. Why should I use containers?
11. When should you not use Docker?
12. Is Docker free to use?

How do I run a docker container?

You can follow these steps:

1. Use docker ps to get the name of the existing container.
2. Use the command docker exec -it <container name> /bin/bash to get a bash shell in the container.
3. Or directly use docker exec -it <container name> <command> to execute whatever command you specify in the container.

What is Docker container and how it works?

Containers. A container is a runnable instance of an image. You can create, start, stop, move, or delete a container using the Docker API or CLI. You can connect a container to one or more networks, attach storage to it, or even create a new image based on its current state.

What is Docker container used for?

A Docker container is an open source software development platform. Its main benefit is to package applications in containers, allowing them to be portable to any system running a Linux or Windows operating system (OS). A Windows machine can run Linux containers by using a virtual machine (VM).

How do I start a docker container and keep it running?

To keep the container running when you exit the terminal session, start it in a detached mode. This is similar to running a Linux process in the background . The detached container will stop when the root process is terminated. You can list the running containers using the docker container ls command.

How is Docker different from VM?

Docker is container based technology and containers are just user space of the operating system. ... In Docker, the containers running share the host OS kernel. A Virtual Machine, on the other hand, is not based on container technology. They are made up of user space plus kernel space of an operating system.

How do I run Docker locally?

docker commands

1. build docker image. docker build -t image-name .
2. run docker image. docker run -p 80:80 -it image-name.
3. stop all docker containers. docker stop $(docker ps -a -q)
4. remove all docker containers. docker rm $(docker ps -a -q)
5. remove all docker images. ...
6. port bindings of a specific container. ...
7. build. ...
8. run.

What is Kubernetes vs Docker?

A fundamental difference between Kubernetes and Docker is that Kubernetes is meant to run across a cluster while Docker runs on a single node. Kubernetes is more extensive than Docker Swarm and is meant to coordinate clusters of nodes at scale in production in an efficient manner.

When should I use Docker?

When To Use Docker?

1. Use Docker as version control system for your entire app's operating system.
2. Use Docker when you want to distribute/collaborate on your app's operating system with a team.
3. Use Docker to run your code on your laptop in the same environment as you have on your server (try the building tool)

How does a container work?

Containers are an abstraction at the app layer that packages code and dependencies together. Multiple containers can run on the same machine and share the OS kernel with other containers, each running as isolated processes in user space.

Why should I use containers?

Containers give developers the ability to create predictable environments that are isolated from other applications. Containers can also include software dependencies needed by the application, such as specific versions of programming language runtimes and other software libraries.

When should you not use Docker?

Do Not Use Docker if You Prioritize Security

If the security of one part is compromised, the rest of them will not be affected. However, while isolated processes in containers promise improved security, all containers share access to a single host operating system.

Is Docker free to use?

Docker, Inc. ... The core Docker platform, which Docker calls Docker Community Edition, is available for anyone to download and run free of charge. (You can also install Docker in other ways, such as by downloading packages through your Linux distribution's repositories.)