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Instead of casting lease ID to uint32, fix the TTL() function
to use etcd time-to-live API for determining TTL. Add configurable
min-lease-ttl and max-lease-ttl options to prevent extreme TTL
values. By default, lease records now go through bounds checking
with 30s to 1d as the min/max.

Added unit tests for validation and docs.

Signed-off-by: Ville Vesilehto <ville@vesilehto.fi>
This commit is contained in:
Ville Vesilehto
2025-09-05 03:14:27 +03:00
committed by GitHub
parent 066e51675c
commit e1768a5d27
6 changed files with 333 additions and 15 deletions
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plugin/etcd/README.md
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@@ -55,6 +55,8 @@ etcd [ZONES...] {
* three arguments - path to cert PEM file, path to client private key PEM file, path to CA PEM
file - if the server certificate is not signed by a system-installed CA and client certificate
is needed.
* `min-lease-ttl` the minimum TTL for DNS records based on etcd lease duration. Accepts flexible time formats like '30', '30s', '5m', '1h', '2h30m'. Default: 30 seconds.
* `max-lease-ttl` the maximum TTL for DNS records based on etcd lease duration. Accepts flexible time formats like '30', '30s', '5m', '1h', '2h30m'. Default: 24 hours.
## Special Behaviour
@@ -83,6 +85,8 @@ skydns.local {
etcd {
path /skydns
endpoint http://localhost:2379
min-lease-ttl 60 # minimum 1 minute for lease-based records
max-lease-ttl 1h # maximum 1 hour for lease-based records
}
prometheus
cache