chore(ops/glesys): prepare DNS setup for whitby decomissioning

Reduces the whitby record TTLs everywhere, and sets up the scaffolding for
adding nevsky/bugry records.

This relates to b/433.

Change-Id: I31b5503fa4fcf5463c989f4cf47a3d403d34c684
Reviewed-on: https://cl.tvl.fyi/c/depot/+/13066
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>

ops/glesys/dns-tvl-fyi.tf

@@ -87,9 +87,30 @@ resource "glesys_dnsdomain_record" "tvl_fyi_whitby_services" {
   type     = "CNAME"
   data     = "whitby.tvl.fyi."
   host     = each.key
+  ttl      = 60 # TODO
   for_each = toset(local.whitby_services)
 }
 
+# Explicit records for all services running on nevsky
+resource "glesys_dnsdomain_record" "tvl_fyi_nevsky_services" {
+  domain   = glesys_dnsdomain.tvl_fyi.id
+  type     = "CNAME"
+  data     = "nevsky.tvl.fyi."
+  host     = each.key
+  ttl      = 600 # TODO
+  for_each = toset(local.nevsky_services)
+}
+
+# Explicit records for all services running on bugry
+resource "glesys_dnsdomain_record" "tvl_fyi_bugry_services" {
+  domain   = glesys_dnsdomain.tvl_fyi.id
+  type     = "CNAME"
+  data     = "bugry.tvl.fyi."
+  host     = each.key
+  ttl      = 600 # TODO
+  for_each = toset(local.bugry_services)
+}
+
 resource "glesys_dnsdomain_record" "tvl_fyi_net_CNAME" {
   domain = glesys_dnsdomain.tvl_fyi.id
   type   = "CNAME"

ops/glesys/dns-tvl-su.tf

@@ -79,10 +79,31 @@ resource "glesys_dnsdomain_record" "tvl_su_whitby_services" {
   domain   = glesys_dnsdomain.tvl_su.id
   type     = "CNAME"
   data     = "whitby.tvl.su."
+  ttl      = 60
   host     = each.key
   for_each = toset(local.whitby_services)
 }
 
+# Explicit records for all services running on nevsky
+resource "glesys_dnsdomain_record" "tvl_su_nevsky_services" {
+  domain   = glesys_dnsdomain.tvl_su.id
+  type     = "CNAME"
+  data     = "nevsky.tvl.su."
+  host     = each.key
+  ttl      = 600
+  for_each = toset(local.nevsky_services)
+}
+
+# Explicit records for all services running on bugry
+resource "glesys_dnsdomain_record" "tvl_su_bugry_services" {
+  domain   = glesys_dnsdomain.tvl_su.id
+  type     = "CNAME"
+  data     = "bugry.tvl.su."
+  host     = each.key
+  ttl      = 600
+  for_each = toset(local.bugry_services)
+}
+
 # historical tvixbolt.tvl.su record, redirects to bolt.tvix.dev
 resource "glesys_dnsdomain_record" "tvix_su_tvixbolt_CNAME" {
   domain = glesys_dnsdomain.tvl_su.id

ops/glesys/main.tf

@@ -107,4 +107,12 @@ locals {
     "status",
     "todo",
   ]
+
+  # Hostnames of all public services on nevsky
+  nevsky_services = [
+  ]
+
+  # Hostnames of all public services on bugry
+  bugry_services = [
+  ]
 }