dnsmasq provides a container image for running DHCP, proxy DHCP, DNS, and/or TFTP with dnsmasq. Use it to test different network setups with clusters of network bootable machines.
The image bundles undionly.kpxe which chainloads PXE clients to iPXE and grub.efi (experimental) which chainloads UEFI architectures to GRUB2.
Run the container image as a DHCP, DNS, and TFTP service.
sudo rkt run --net=host quay.io/coreos/dnsmasq \
--caps-retain=CAP_NET_ADMIN,CAP_NET_BIND_SERVICE,CAP_SETGID,CAP_SETUID,CAP_NET_RAW \
-- -d -q \
--dhcp-range=192.168.1.3,192.168.1.254 \
--enable-tftp \
--tftp-root=/var/lib/tftpboot \
--dhcp-userclass=set:ipxe,iPXE \
--dhcp-boot=tag:#ipxe,undionly.kpxe \
--dhcp-boot=tag:ipxe,http://matchbox.example.com:8080/boot.ipxe \
--address=/matchbox.example.com/192.168.1.2 \
--log-queries \
--log-dhcpsudo docker run --rm --cap-add=NET_ADMIN --net=host quay.io/coreos/dnsmasq \
-d -q \
--dhcp-range=192.168.1.3,192.168.1.254 \
--enable-tftp --tftp-root=/var/lib/tftpboot \
--dhcp-userclass=set:ipxe,iPXE \
--dhcp-boot=tag:#ipxe,undionly.kpxe \
--dhcp-boot=tag:ipxe,http://matchbox.example.com:8080/boot.ipxe \
--address=/matchbox.example/192.168.1.2 \
--log-queries \
--log-dhcpPress ^] three times to stop the rkt pod. Press ctrl-C to stop the Docker container.
Configuration arguments can be provided as flags. Check the dnsmasq man pages for a complete list.
| flag | description | example |
|---|---|---|
| --dhcp-range | Enable DHCP, lease given range | 172.18.0.50,172.18.0.99, 192.168.1.1,proxy,255.255.255.0 |
| --dhcp-boot | DHCP next server option | http://matchbox.foo:8080/boot.ipxe |
| --enable-tftp | Enable serving from tftp-root over TFTP | NA |
| --address | IP address for a domain name | /matchbox.foo/172.18.0.2 |
Build a container image locally.
make docker-image
Run the image with Docker on the docker0 bridge (default).
sudo docker run --rm --cap-add=NET_ADMIN coreos/dnsmasq -d -q