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plugin/file/cache: Add metadata for wildcard record responses (#5308)

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For responses synthesized by known wildcard records, publish metadata containing the wildcard record name

Signed-off-by: Chris O'Haver <cohaver@infoblox.com>
This commit is contained in:
Chris O'Haver
2022-07-07 17:07:04 -04:00
committed by GitHub
parent e80d696502
commit 83adb8fa22
5 changed files with 93 additions and 3 deletions
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9
plugin/cache/cache.go vendored
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@@ -114,6 +114,9 @@ type ResponseWriter struct {
ad bool // When true the original request had the AD bit set.
prefetch bool // When true write nothing back to the client.
remoteAddr net.Addr
wildcardFunc func() string // function to retrieve wildcard name that synthesized the result.
}
// newPrefetchResponseWriter returns a Cache ResponseWriter to be used in
@@ -202,6 +205,9 @@ func (w *ResponseWriter) set(m *dns.Msg, key uint64, mt response.Type, duration
switch mt {
case response.NoError, response.Delegation:
i := newItem(m, w.now(), duration)
if w.wildcardFunc != nil {
i.wildcard = w.wildcardFunc()
}
if w.pcache.Add(key, i) {
evictions.WithLabelValues(w.server, Success, w.zonesMetricLabel).Inc()
}
@@ -212,6 +218,9 @@ func (w *ResponseWriter) set(m *dns.Msg, key uint64, mt response.Type, duration
case response.NameError, response.NoData, response.ServerError:
i := newItem(m, w.now(), duration)
if w.wildcardFunc != nil {
i.wildcard = w.wildcardFunc()
}
if w.ncache.Add(key, i) {
evictions.WithLabelValues(w.server, Denial, w.zonesMetricLabel).Inc()
}