# Installing Dragonfly CDN Server

This topic explains how to install the Dragonfly CDN server.

## Prerequisites

When deploying with Docker, the following conditions must be met.

| Required Software | Version Limit |
| ----------------- | ------------- |
| Git               | 1.9.1+        |
| Docker            | 1.12.0+       |

## Procedure - When Deploying with Docker

### Get cdn image

You can get it from [DockerHub](https://hub.docker.com/) directly.

1. Obtain the latest Docker image of the cdn.

   ```sh
   docker pull dragonflyoss/cdn
   ```

Or you can build your own cdn image.

1. Obtain the source code of Dragonfly.

   ```sh
   git clone https://github.com/dragonflyoss/Dragonfly2.git
   ```

2. Enter the project directory.

   ```sh
   cd Dragonfly2
   ```

3. Build the Docker image.

   ```sh
   TAG="2.0.0"
   make docker-build-cdn D7Y_VERSION=$TAG
   ```

4. Obtain the latest Docker image ID of the cdn.

   ```sh
   docker image ls | grep 'cdn' | awk '{print $3}' | head -n1
   ```

### Start cdn

**NOTE:** Replace ${cdnDockerImageId} with the ID obtained at the previous step.

```sh
docker run -d --name cdn --restart=always \
    -p 8001:8001 -p 8003:8003 \
    -v /home/admin/ftp:/home/admin/ftp ${cdnDockerImageId} \
    --download-port=8001
```

After cdn is installed, run the following commands to
verify if Nginx and **cdn** are started,
and if Port `8001` and `8003` are available.

```sh
telnet 127.0.0.1 8001
telnet 127.0.0.1 8003
```