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Add noble DNS ops file for warden/bosh-lite deployments#512

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fix-noble-warden-dns
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Add noble DNS ops file for warden/bosh-lite deployments#512
neddp wants to merge 1 commit into
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fix-noble-warden-dns

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@neddp

@neddp neddp commented Jun 22, 2026

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On warden containers, systemd-resolved has no DHCP-provided upstream DNS because warden does not configure DNS in the container network namespace. With disable_recursors=true (the noble default), all external DNS queries fail with REFUSED or SERVFAIL.

Add warden/noble-dns.yml which overrides the bosh-dns-systemd addon to:

  • set disable_recursors=false so bosh-dns forwards external queries
  • set recursors=[169.254.169.254] as the explicit upstream (the link-local metadata DNS available on GCP, AWS and Azure)

Apply the ops file in virtualbox/create-env.sh and both warden/docker CI tasks which deploy noble stemcells on warden.

Note: Please create PR's against the develop branch

On warden containers, systemd-resolved has no DHCP-provided upstream
DNS because warden does not configure DNS in the container network
namespace. With disable_recursors=true (the noble default), all external
DNS queries fail with REFUSED or SERVFAIL.

Add warden/noble-dns.yml which overrides the bosh-dns-systemd addon to:
- set disable_recursors=false so bosh-dns forwards external queries
- set recursors=[169.254.169.254] as the explicit upstream (the
  link-local metadata DNS available on GCP, AWS and Azure)

Apply the ops file in virtualbox/create-env.sh and both warden/docker
CI tasks which deploy noble stemcells on warden.

Co-authored-by: Saumya Dudeja <saumya.dudeja@sap.com>
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