To install Knot DNS on Debian or Ubuntu, you can follow these steps:
Open the terminal on your Debian/Ubuntu system.
Update the package list using the following command:
sudo apt update
Install the Knot DNS package by running the following command:
sudo apt install knot-dns
After the installation is complete, you can start the Knot DNS service using the following command:
sudo systemctl start knot
To enable Knot DNS to start automatically at boot time, run the following command:
sudo systemctl enable knot
To check the status of the Knot DNS service, run the following command:
sudo systemctl status knot
That’s it! Knot DNS should now be installed and running on your Debian/Ubuntu system. You can configure it by editing the configuration file located at /etc/knot/knot.conf.
Running Knot DNS in Docker is a way to isolate the application and simplify its deployment. But this is just for testing, using in production you should avoid this.
Here are the steps you can follow if you still want to use docker:
Install Docker on your system if you haven’t already done so.
Create a new directory where you will store your Docker files and navigate to it in your terminal.
Create a new file named Dockerfile and paste the following code in it:
FROM alpine:latest
RUN apk update && apk add knot knot-dns-tools
CMD ["knotd", "-c", "/etc/knot/knot.conf"]
This Dockerfile uses Alpine as the base image, installs Knot DNS and its tools, and sets the command to start the Knot daemon with the configuration file located at /etc/knot/knot.conf.
Create a new directory named knot in the same directory where you created the Dockerfile.
Create a new configuration file named knot.conf inside the knot directory. You can use the following example configuration:
# Listen on all interfaces
listen: [ "::", "0.0.0.0" ]
# Define your zones here
zone:
name: example.com
file: /etc/knot/zones/example.com.zone
# Store zone files in this directory
directory: /etc/knot/zones/
This configuration file listens on all interfaces and defines one zone named example.com. It also specifies that zone files should be stored in the /etc/knot/zones/ directory.
Create a new directory named zones inside the knot directory.
Create a new zone file named example.com.zone inside the zones directory. You can use the following example zone file:
$ORIGIN example.com.
$TTL 86400
@ IN SOA ns1.example.com. admin.example.com. (
2019032301 ; Serial
86400 ; Refresh
7200 ; Retry
864000 ; Expire
86400 ; TTL
)
IN NS ns1.example.com.
ns1 IN A 192.168.1.1
This zone file defines a single record for the ns1 host in the example.com zone.
docker build -t knot-dns .
This command builds a new Docker image named knot-dns based on the Dockerfile you created.
docker run --name knot-dns -p 53:53/udp -p 53:53/tcp -v "$(pwd)/knot:/etc/knot" knot-dns
This command runs a new Docker container named knot-dns, maps port 53 to the host system, mounts the knot directory as the /etc/knot directory in the container, and uses the knot-dns image you built earlier.
That’s it! You should now have a running Knot DNS server in a Docker container. You can test it by querying the server from another machine on your network, or by running dig on your local machine.