interpolate network.dns block on client #11851
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Confirmed, and intend to work on. No timeline committment though.
theme/networking
type/enhancement
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tgross
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nvx
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Feb 8, 2022
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#12021 has been merged and will ship in 1.3.0 |
ghost
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Apr 10, 2022
With the move of dnsmasq to the host, we now need a way to tell the containers to use the host for their dns lookups if they want to use consul dns. Typically on a host you would just add a nameserver for 127.0.0.1, but that doesn't work because in the container 127.0.0.1 points to the container not the host. Ideally we'd just be passing in attr.unique.network.ip-address, but unfortunately, variable interpolation is only available for network.dns as of Nomad 1.3 per hashicorp/nomad#11851 So instead we're stuck doing grabbing an IP from `hostname -I` and passing that in as an environment variable. This may actually be for the best if we end up setting a distinct dns service in production
inickles-grapl
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Apr 20, 2022
With the move of dnsmasq to the host, we now need a way to tell the containers to use the host for their dns lookups if they want to use consul dns. Typically on a host you would just add a nameserver for 127.0.0.1, but that doesn't work because in the container 127.0.0.1 points to the container not the host. Ideally we'd just be passing in attr.unique.network.ip-address, but unfortunately, variable interpolation is only available for network.dns as of Nomad 1.3 per hashicorp/nomad#11851 So instead we're stuck doing grabbing an IP from `hostname -I` and passing that in as an environment variable. This may actually be for the best if we end up setting a distinct dns service in production
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From #11845 (comment) @nvx requested being able to interpolate the
network.dns.serversfield with node metadata. We likely don't interpolate thenetworkblock because we need it to be complete for scheduling, but thednsblock defaults to the client if unset, so it should be safe to interpolate after landing on the client.The text was updated successfully, but these errors were encountered: