How to change DNS nameserver for CoreOS?

  • Posted on September 19, 2014
  • bryantlukAsked by bryantluk


I’m using the CoreOS image for my droplet. Is there any way to change which DNS name server is used? I would actually like to use for service lookup and have it fallback to the Google DNS servers.

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On CoreOS, /etc/resolve.conf is managed by systemd. One way to append to it would be to use the cloud-config metadata to add a new systemd unit file. Something like:

    # generate a new token for each unique cluster from
    # multi-region deployments, multi-cloud deployments, and droplets without
    # private networking need to use $public_ipv4
    addr: $private_ipv4:4001
    peer-addr: $private_ipv4:7001
    public-ip: $private_ipv4   # used for fleetctl ssh command
    - name: etcd.service
      command: start
    - name: fleet.service
      command: start
    - name:
      content: |