Hi,
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 consul.io 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:
#cloud-config
coreos:
etcd:
# generate a new token for each unique cluster from https://discovery.etcd.io/new
discovery: https://discovery.etcd.io/[your-token-here]
# 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
fleet:
public-ip: $private_ipv4 # used for fleetctl ssh command
units:
- name: etcd.service
command: start
- name: fleet.service
command: start
units:
- name: nameservers.network
content: |
[Network]
DNS=8.8.4.4
DNS=8.8.8.8
Thanks. While I can append entries to the nameservers list, I don’t think it guarantees usage. I guess I would really like to replace the nameservers used entirely.