Connecting to a Docker container via sFTP can be useful for developers who work with files inside the container. For example, if you are developing a web application and want to upload a file to the server, you can connect to the container via sFTP and upload the file to the server from your development environment.
Additionally, when connecting to a Docker container via sFTP, you can use various sFTP functions to manage files.
Deployment of the Docker container via sFTP.
To connect to a Docker container via sFTP, you first need to create a container that will be launched on a remote server. For this, you can use the docker run command. For example, to start a container with nginx on port 2222 and install OpenSSH, you can use the following commands:
docker run -d -p 2222:22 --name nginx_latest nginx
docker exec -it nginx_latest apt-get update
docker exec -it nginx_latest apt-get install -y openssh-server
This command will create a new container named "nginx_latest" based on the Nginx image and install OpenSSH inside the container.
We will set the password for the selected user.
Set the password for root (or any other user you want to connect to) by executing the command:
docker exec -it nginx_latest passwd root
Enter the password twice.
Edit the /etc/ssh/sshd_config file in the container, replacing PermitRootLogin without-password with PermitRootLogin yes. To connect and edit it, use the following command:
docker exec -it nginx_latest bash
Use your favorite editor. If it is not there, install it.
Restart the ssh-server by executing the command:
/etc/init.d/ssh restart
Connecting to the Docker container by IP using sFTP.
For this, it is necessary to determine the IP address of the container and the port on which the SSH server is running. This can be done using the docker inspect command. For example, if the container is running on port 2222, you can use the following command to get the IP address:
docker inspect --format '{{ .NetworkSettings.IPAddress }}' nginx_latest
This command will return the IP address of the container. Then you can connect to the container via sFTP using the user's credentials installed inside the container. For example, using the sftp command:
sftp [email protected]
Where root is the name of the user installed inside the container, and ip-address is the IP address of the container (172.17.0.4), obtained using the docker inspect command.
Connection using FileZilla.
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In the "File" menu, select "Site Management" (or use the hotkey "Ctrl+S").
- In the "Site Management" window, click the "New site" button and enter the name of your site.
- In the "Host", "Port", "Username" and "Password" fields, enter the corresponding values using the information from your Docker container. By default, the user name is "root", and the port is "2222".
- In the "Protocol" drop-down list, select "SFTP - SSH File Transfer Protocol".
- Click "Connect". If all the settings are correct, you should be connected to your Docker container via sFTP via an sFTP client.
Now you can connect to the Docker container via sFTP, transfer files and perform other operations with files on a remote server.