Ø Docker runs on host O.S
Ø It is responsible for the running container to manage docker services.
Ø Docker daemons can communicate with other daemons.
Ø Docker users can interact with docker through a client.
Ø Docker Client uses commands and REST APIS to communicate with the docker daemon.
Ø When a Client runs any server command on the docker client terminal, the client terminals send these docker commands to the docker daemon.
Ø It is possible for Docker client to communicate with more than one daemon.
Ø It is used to provide an environment to execute and run applications. It contains the docker daemon, images, containers, networks, and Storage.
Ø It manages and Stores the docker Images.
Ø There are two types of registry in the docker.
o Public Registry
o Private Registry
Ø Docker images are the read-only binary templates used to create a container.
Ø Single files with all dependencies and configurations required to run a program.
#dockerfiles #devops-tool #devops #docker
Following the second video about Docker basics, in this video, I explain Docker architecture and explain the different building blocks of the docker engine; docker client, API, Docker Daemon. I also explain what a docker registry is and I finish the video with a demo explaining and illustrating how to use Docker hub
In this video lesson you will learn:
#docker #docker hub #docker host #docker engine #docker architecture #api
In my previous blog post, I have explained in detail how you can Install Docker and Docker-compose on Ubuntu
In this guide, I have explained the Top 24 Docker Commands with examples.
Make sure you have sudo or root privileges to the system.
#docker #docker-command #containers #docker-compose #docker-image
We can get a list of all containers in docker using
docker container list or
docker ps commands.
To list down docker containers we can use below two commands
docker container ls command introduced in docker 1.13 version. In older versions we have to use
docker ps command.
The below command returns a list of all containers in docker.
docker container list -all
docker container ls -all
In older version of docker we can use
docker ps command to list all containers in docker.
$ docker ps -all
$ docker ps -a
The default docker container ls command shows all running docker containers.
$ docker container list
$ docker container ls
To get list of all running docker containers use the below command
$ docker ps
To get list of all stopped containers in docker use the below commands
$ docker container list -f "status=exited"
$ docker container ls -f "status=exited"
or you can use docker ps command
$ docker ps -f "status=exited"
To list out all latest created containers in docker use the below command.
$ docker container list --latest
To display n last created containers in docker use the below command.
$ docker container list --last=n
#docker #docker-container #docker-command
Now since we have understood the basic architecture of Docker in my previous tutorial titled “Docker: Understanding Docker Architecture and Components”, lets now learn how to install Docker and run some basic commands.
3. The memory should be at least 2 GB and there should be at least 2 core CPU.
The First thing we are going to do is to run the **“docker run hello-world” **command.
This command tries to find the “hello-world” image locally and if not found, it then downloads an image from the docker hub and runs the container out of this image.
#automation #containerization #docker-container #docker #docker-image
If you have recently come across the world of containers, it’s probably not a bad idea to understand the underlying elements that work together to offer containerisation benefits. But before that, there’s a question that you may ask. What problem do containers solve?
After building an application in a typical development lifecycle, the developer sends it to the tester for testing purposes. However, since the development and testing environments are different, the code fails to work.
Now, predominantly, there are two solutions to this – either you use a Virtual Machine or a containerised environment such as Docker. In the good old times, organisations used to deploy VMs for running multiple applications.
So, why did they started adopting containerisation over VMs? In this article, we will provide detailed explanations of all such questions.
#docker containers #docker engine #docker #docker architecture