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dns.md

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Configuring DNS

Traefik routes traffic that matches the hostname of a Docker service's traefik.frontend.rule label. However, for applications running on your host machine (curl, wget, the browser, etc.) to be able to know where to find the host you need to configure your DNS to resolve all hostnames ending on ".localhost" to your local IP address.

Linux (Ubuntu)

On Ubuntu 18.04 no action is required, because systemd-resolved already resolves hostnames ending on ".localhost" to 127.0.0.1 and ::1.

If for some reason resolving is not working on Ubuntu, make sure that the symlink /etc/resolv.conf is pointing to /run/systemd/resolve/stub-resolv.conf:

ll /etc/resolv.conf

If this doesn't point to /run/systemd/resolve/stub-resolv.conf, overwrite the symbolic link:

sudo ln -sf /run/systemd/resolve/stub-resolv.conf /etc/resolv.conf

macOS High Sierra

On macOS the same can be achieved by installing dnsmasq and configuring it to route all traffic for ".localhost" to 127.0.0.1:

brew install dnsmasq

mkdir -pv $(brew --prefix)/etc/
echo 'address=/.localhost/127.0.0.1' >> $(brew --prefix)/etc/dnsmasq.conf
echo 'port=53' >> $(brew --prefix)/etc/dnsmasq.conf

sudo brew services start dnsmasq

sudo mkdir -v /etc/resolver
sudo bash -c 'echo "nameserver 127.0.0.1" > /etc/resolver/localhost'

ping dashboard.leviy.localhost

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