Awesome

Dory's dnsmasq container

What is this?

Dory uses this container to provide the dnsmasq services in conjunction with an nginx-proxy. It's a very lightweight container built on Alpine Linux (based off of andyshinn/dnsmasq. See the dory project page for more info.

How do I use it?

A single TLD

You can use this container in your project, or as a standalone utility if you'd like.

Here's how to fire it up.

docker run -p 53:53/tcp -p 53:53/udp --cap-add=NET_ADMIN freedomben/dory-dnsmasq:1.0.0 [<domain>] [<ip>]

So if you wanted all queries against domain "docker" to be routed to IP 3.3.3.3:

docker run -p 53:53/tcp -p 53:53/udp --cap-add=NET_ADMIN freedomben/dory-dnsmasq:1.0.0 docker 3.3.3.3

If you'd rather extend it to bake in your defaults, here's an example:

FROM freedomben/dory-dnsmasq

CMD["docker", "3.3.3.3"]

Multiple TLDs

You can have more than one TLD if you prefer. Use the container the same way as with a single TLD, but add each domain and ip as extra args.

docker run -p 53:53/tcp -p 53:53/udp --cap-add=NET_ADMIN freedomben/dory-dnsmasq:1.0.0 [<domain1>] [<ip1>] [<domain2>] [<ip2>]

So if you wanted all queries against domain "docker" to be routed to IP 3.3.3.3, and dev to be routed to 4.4.4.4:

docker run -p 53:53/tcp -p 53:53/udp --cap-add=NET_ADMIN freedomben/dory-dnsmasq:1.0.0 docker 3.3.3.3 dev 4.4.4.4

The domains can go to the same IP. You just have to repeat it. Say you wanted both to go to 3.3.3.3:

docker run -p 53:53/tcp -p 53:53/udp --cap-add=NET_ADMIN freedomben/dory-dnsmasq:1.0.0 docker 3.3.3.3 dev 3.3.3.3

Wildcard

You can have all domain names that are not answered from /etc/hosts or DHCP be resolved to a specific address by using a # as the domain. So to have all requests be resolved to 4.4.4.4:

docker run -p 53:53/tcp -p 53:53/udp --cap-add=NET_ADMIN freedomben/dory-dnsmasq:1.0.0 '#' 4.4.4.4

NOTE: You have to put the # in quotes otherwise bash will think it's a comment character