Welcome to this tutorial on installing Docker on CentOS 7. In this blog, we will introduce how to install Docker on CentOS 7 operating system. Docker is an open source application container engine that allows developers to package their applications and dependencies into a portable container and then distribute them to any popular Linux machine. Let's get started.
1. Update your system
First, make sure your operating system is up to date. This can be done by running the following command:
yum update -y
2. Install Docker
The default warehouse of CentOS 7 already contains Docker, you can directly use the yum command to install it. However, in order to ensure that the latest version of Docker can be installed, we will use Docker's official repository for installation.
First install some necessary packages:
yum install -y yum-utils device-mapper-persistent-data lvm2
Then add the Docker repository:
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
Note: If the following error occurs, this is because the system does not have this command installed by default. This command is in the yum-utils package and can be yum -y install yum-utilsinstalled by command
[root@ecs-1pku3 ~]# yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
yum-config-manager：找不到命令
Now, you can install Docker:
yum install docker-ce
3. Start Docker and set it to start at boot
After installing Docker, we need to start Docker:
systemctl start docker
We can also make Docker run automatically on startup:
systemctl enable docker
4. Verify Docker installation
To verify that Docker was installed correctly, you can run a test Docker image. For example, you can run a Hello World image:
docker run hello-world
If Docker is installed correctly, you will see a message telling you that your Docker is working fine.
in conclusion
The above are the detailed steps to install Docker on CentOS 7. You should now have successfully installed Docker on your CentOS 7 system. Docker provides an efficient and reliable way to distribute and run software, both in development and production environments.
I hope this tutorial is helpful to you. If you encounter any problems during the installation process, please leave a message in the comment area to ask questions, and I will try my best to answer them.