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Ryan Malloy 87eaa27c4c coredns: auto-bump SOA serial (NN counter) on every make prep

Previously: `SERIAL=$(date +%Y%m%d)01` — same-day re-runs produced the
same serial. HE polled, saw no change, never pulled the update.

Now: scan zones-prepared/ for the highest `YYYYMMDDNN` matching today's
date and increment the NN counter. First run of the day starts at NN=01.
Caps at NN=99 with a clear error message (set SERIAL manually if you
genuinely need >99 changes per day).

`SERIAL=<value> make prep` still overrides the auto-detection, useful
for forcing a specific serial during recovery or for testing.

Verified end-to-end on dell01: prep bumped 2026051601 → 2026051602,
CoreDNS auto-reload picked it up within 30s, all queried zones serve
the new serial. HE will pull on its next refresh poll (SOA refresh
= 3600s, so worst case 1 hour).

2026-05-16 16:25:53 -06:00

caddy

coredns: production Let's Encrypt cert via Caddy sidecar (DNS-01 + Vultr)

2026-05-14 01:34:57 -06:00

scripts

coredns: auto-bump SOA serial (NN counter) on every make prep

2026-05-16 16:25:53 -06:00

zones

coredns: docker compose stack with Vultr zone import

2026-05-12 01:51:09 -06:00

.env

coredns: rename endpoint dns.l.supported.systems -> dns.supported.systems