What else docker needs to install?

Docker is a very popular containerization technology that allows developers to package applications and their dependencies into a self-contained container and deploy it in any environment. The installation process of Docker is relatively simple, but it requires some prerequisites. In addition to installing Docker itself, you also need to set some options for Docker and install some common tools. This article will provide an in-depth introduction to the installation process of Docker and the components that need to be installed.

1. Install Docker

First, you need to install Docker. This process is operating system dependent. For Ubuntu systems, you can use the apt-get command to install Docker:

sudo apt-get update
sudo apt-get install docker-ce

After the installation is complete, use the following command to verify whether Docker has been successfully installed:

sudo docker run hello-world

If "Hello from Docker!" is output "This kind of information means that Docker has been successfully installed.

2. Add users to the Docker group

By default, only the root user can access the Docker daemon, and other users need to use the sudo command to run Docker commands. To avoid permission issues, we can add the current user to the Docker group:

sudo usermod -aG docker $USER

After logging out and logging back in, you can avoid the trouble of using sudo to run Docker commands.

3. Set up startup

In order to make Docker start automatically at boot, you can use the following command:

sudo systemctl enable docker

4. Install Docker Compose

Docker Compose is a standalone tool that allows users to define and run multiple Docker containers through a single YAML file. Docker Compose is not part of Docker and needs to be installed separately. Before using Docker Compose, you need to ensure that Python-pip has been installed:

sudo apt-get install python-pip

Then use the pip command to install Docker Compose:

sudo pip install docker-compose

After the installation is complete, use the following command to verify whether Docker Compose has been successful Installation:

docker-compose version

5. Install Docker Machine

Docker Machine is a command line tool that can be used to create, operate and manage Docker hosts in a local or cloud environment. Before using Docker Machine, you need to make sure you have installed VirtualBox or VMware Workstation or VMware Fusion or Hyper-V:

sudo apt-get install virtualbox

Then use the following command to install Docker Machine:

sudo curl -L "https://github.com/docker/machine/releases/download/v0.16.0/docker-machine-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-machine &&
sudo chmod +x /usr/local/bin/docker-machine

Use the following command to verify Docker Whether the Machine has been successfully installed:

docker-machine version

6. Install Docker Swarm

Docker Swarm is Docker’s native cluster management tool that allows users to use Docker to build, publish and manage distributed application. Before using Docker Swarm, you need to ensure that Docker Compose has been installed:

sudo apt-get update
sudo apt-get install docker-compose

Then use the following command to install Docker Swarm:

docker swarm init

7. Install Docker Registry

Docker Registry is a central repository of Docker images that allows users to easily share and manage Docker images. Before using Docker Registry, you need to ensure that Docker Compose has been installed:

sudo apt-get update
sudo apt-get install docker-compose

Then use the following command to install Docker Registry:

docker run -d -p 5000:5000 --name registry -v /var/lib/registry:/var/lib/registry registry:2

This command starts a Docker Registry locally and stores the image In the /var/lib/registry directory.

Conclusion

This article introduces the installation process of Docker and some components that need to be installed additionally. Please note that these components are not part of the core components of Docker, but they all work well to extend and enhance the functionality of Docker and improve developer productivity.

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