How to create a docker warehouse

With the continuous evolution of modern software development, more and more applications are beginning to use container technology for deployment and management. Docker is one of the most popular containerization platforms out there, offering powerful features and good portability.

When you start using Docker, you typically download an existing image in the Docker registry to run your application. However, in some cases, you may need to create your own private Docker repository to manage your own Docker images. This gives you greater security and control, making your development and deployment more efficient.

In this article, we will introduce the steps to create a Docker warehouse.

Step 1: Install Docker

Before we start creating a Docker repository, we need to make sure Docker is installed on the local machine. Depending on your operating system, you can install Docker through the following steps:

For Linux systems:

Visit the Docker official website https://docs.docker.com/engine/install/ and Choose the appropriate installation guide based on your Linux distribution.

For Mac system:

Visit Docker official website https://docs.docker.com/docker-for-mac/install/, download Docker Desktop and follow the installation instructions to complete the installation.

For Windows systems:

Visit the Docker official website https://docs.docker.com/docker-for-windows/install/, download Docker Desktop and follow the installation instructions to complete the installation.

After the installation is complete, open a terminal and run the following command to check whether Docker has been installed successfully:

docker --version

If the Docker version information is returned, it means that Docker has been installed on your system .

Step 2: Create a Docker warehouse

The process of creating a Docker warehouse requires the use of Docker Hub, so you need to register a Docker Hub account first.

1. Visit the Docker Hub official website https://hub.docker.com/ and register an account.
2. Create a new repository on Docker Hub, as shown in the figure below.

3. After the creation is completed, you will be able to see a command on the warehouse page as follows:

docker push <your-image-name>

It tells How do you push your image to the repository.

Step 3: Create a local Docker repository

Now we have registered a Docker Hub account and created a repository warehouse. Next, we will create a Docker repository locally and connect it to the repository on Docker Hub.

1. Create a directory to store the data required by the Docker repository:

mkdir /path/to/registry

2. Next, use the following command to pull one from the Docker official image repository Registry image:

docker pull registry:latest

3. Run the following command to start the Docker local repository:

docker run -d -p 5000:5000 --name local-registry -v /path/to/registry:/var/lib/registry registry:latest

This command will pull the latest from the registry repository on Docker Hub registry image and start it locally in background mode (-d). At the same time, it will listen on local port 5000 and store the warehouse data in the directory /path/to/registry created above.

4. In order to confirm whether the local Docker repository is running successfully, you can use the following command to query all running Docker containers:

docker ps

This command will display the running Docker Container details, which should include the container named local-registry.

Now, the local Docker repository has been created and can start pushing images to the repository repository it manages. Next, we'll demonstrate how to import local images and push them to a repository on Docker Hub.

Step 4: Import local images and push them to the repository on Docker Hub

Suppose we have created some Docker images and saved them locally. Now, we will demonstrate how to import these images into the local Docker repository and push them to the repository repository on Docker Hub through the following steps.

1. First, use the following command to mark the image to be pushed as localhost:5000/my-image (where my-image is your image name):

docker tag my-image localhost:5000/my-image

This command will create a new label for the image my-image and name it localhost:5000/my-image. This tag will instruct Docker to use the local Docker repository when pushing images.

2. Next, use the following command to push the image to the local Docker repository:

docker push localhost:5000/my-image

This command will push the image to port 5000 of your local Docker repository.

3. Finally, use the following command to push the image to the repository on Docker Hub:

docker push your-docker-id/my-image

This command will push the image to the repository created in your Docker Hub account In the repository, your-docker-id is your Docker Hub username.

Now, you have successfully connected the local Docker warehouse and the repository warehouse on Docker Hub. You can view the images you pushed to the repository on Docker Hub, or download them to your local computer via the pull command.

Summary

Docker repository makes the deployment and management of Docker applications easier and more convenient. In this article, we showed you how to create a local Docker repository and connect it to a repository on Docker Hub. The process of creating a Docker repository not only increases security and control, but also greatly improves efficiency when working as a team.

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