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kevinveenbirkenbachandClaude Opus 5
918c401081
A deployment that keeps the shipped DOMAIN_PRIMARY serves names under
infinito.localhost. Those exist in no zone - coredns only knows the outer
stack's domain - so anything reaching the deployment's own domain from the host
depends on the myhostname NSS module, which maps *.localhost to loopback per RFC
6761. 3ebc4d152 established that and titled it "on every target", but the role
carrying it is reachable from exactly one place, sys-svc-mail, so a deploy
without mail never gets the guarantee.
web-app-bigbluebutton is where that surfaces. Job 94846729503 of run
31823654078 replays the role's README per distro; fedora and arch answered its
Greenlight gate with 200, and debian failed 30 attempts with elapsed: 0 and
"<urlopen error [Errno -2] Name or service not known>". In that distro's window
sys-hostname does not appear at all - the play reaches sys-stk-front-proxy at
18:27:45 and the gate at 18:30:06, both before anything pulls the role in. The
asymmetry is declared, not incidental: meta/packages.yml gives Debian
libnss-myhostname and both other families an empty list, because there the
module ships inside systemd.
The front proxy is the chokepoint every domain-serving role passes through, and
it stands up two domain probes of its own, so the guarantee belongs in front of
it. Including sys-hostname there would have been wrong: half that role is
gated only on DOCKER_IN_CONTAINER, so on a production target it would newly run
ansible.builtin.hostname on every domain-serving deploy and rename hosts whose
inventory entry is an alias. CI cannot show this - it always runs in a
container, where exactly those tasks skip.
So the resolution half moves to sys-svc-nss and sys-hostname includes it,
leaving the mail path unchanged while the front proxy takes only what it needs.
required_by names both callers rather than taking the coverage opt-out
sys-hostname still carries as a TODO.
Verified: tests/lint 335 passed / 307 subtests, tests/integration/roles 107
passed / 610 subtests, make readme-check clean. The role itself is unchanged in
behaviour and was already exercised on all five CI distros in job 94636437319 -
ubuntu and debian install the package, fedora, arch and centos skip it, and the
nsswitch line is a no-op everywhere.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
5 lines
156 B
YAML
5 lines
156 B
YAML
---
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- name: "🔧 Guarantee *.localhost loopback resolution (Once)"
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include_tasks: 00_core.yml
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when: not (run_once_sys_svc_nss | default(false) | bool)
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