[Consul + Registrator] #docker

docker

#sysvinit /etc/default/docker
#append '--bip=172.17.42.1/24 --dns=172.17.42.1' to DOCKER_OPTS
DOCKER_OPTS="-H tcp://127.0.0.1:4243 -H unix:///var/run/docker.sock --bip 172.17.42.1/24 --dns 172.17.42.1 --dns 8.8.8.8 --dns 8.8.4.4 --dns-search service.consul"

docker-compose.yml

# Resources #
# http://howtocookmicroservices.com/docker-compose/#docker-compose-1
# http://artplustech.com/docker-consul-dns-registrator/
#
# Service Discovery - Consul
#
consul:
    container_name: consul
    # http://artplustech.com/docker-consul-dns-registrator/
    # only difference to the server is that it has the web ui
    image: gliderlabs/consul-server:latest
    # Options: https://www.consul.io/docs/agent/options.html#_client
    command: -server -bootstrap
    ports:
        - "8300:8300"
        - "8400:8400"
        - "8500:8500"
        - "172.17.42.1:53:8600/udp"
        # it is very very important to bind the fixed docker bridge IP and DNS port to 8600
#
# Service Discovery - Registrator
#
registrator:
    container_name: registrator
    image: gliderlabs/registrator:latest
    #Options: http://gliderlabs.com/registrator/latest/user/run/
    command: -internal consul://consul:8500
    links:
        - consul
    volumes:
        - "/var/run/docker.sock:/tmp/docker.sock"

docker.service

#Systemd /lib/systemd/system/docker.service
#append '--bip=172.17.42.1/24 --dns=172.17.42.1' to ExecStart
ExecStart=/usr/bin/docker daemon -H fd:// --bip=172.17.42.1/24 --dns=172.17.42.1 --dns=8.8.8.8 --dns=8.8.4.4 --dns-search=service.consul

resolv.conf

#/etc/resolv.conf
#add 'nameserver 172.17.42.1'
nameserver 172.17.42.1
#this one should already exist
nameserver 127.0.1.1