Multihost dns with skydns v1 and skydock

Skydns

Start skydns on one of the hosts, for example host1:

docker run -d --name skydns \
-p 53:53/udp \
-p 8080:8080/tcp \
crosbymichael/skydns:latest \
-nameserver="8.8.8.8:53" \
-domain="deki.local"

If running on Centos 7 use IP with port bind:

docker run -d --name skydns \
-p $HOSTIP:53:53/udp \
-p $HOSTIP:8080:8080/tcp \
crosbymichael/skydns:latest \
-nameserver="8.8.8.8:53" \
-domain="deki.local"

where $HOSTIP is the ip address of host1.

Skydock

Skydock will run on both hosts , host1 and host2. On run this on both hosts:

docker run -d -v /var/run/docker.sock:/docker.sock \
--name skydock crosbymichael/skydock \
-ttl 30 -environment dev -s /docker.sock \
-domain "deki.local" \
-skydns="http://$DNS_IP:8080/"

In this case since we run skydns on host1, $DNS_IP is ip address of host1. In this setup we have one DNS on host1, and skydock running on both. Each time container is started/stopped/destroyed skydock on that node will update DNS records for us. This setup can be further improved by running multiple DNS servers and multiple instances of skydock for higher availability.