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plugin/view: Advanced routing interface and new 'view' plugin (#5538)

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* introduce new interface "dnsserver.Viewer", that allows a plugin implementing it to decide if a query should be routed into its server block.
* add new plugin "view", that uses the new interface to enable a user to define expression based conditions that must be met for a query to be routed to its server block.

Signed-off-by: Chris O'Haver <cohaver@infoblox.com>
This commit is contained in:
Chris O'Haver
2022-09-08 14:56:27 -04:00
committed by GitHub
parent 1f0a41a665
commit b56b080a7c
36 changed files with 880 additions and 114 deletions
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14
plugin/metrics/vars/report.go
View File

@@ -9,7 +9,7 @@ import (
// Report reports the metrics data associated with request. This function is exported because it is also
// called from core/dnsserver to report requests hitting the server that should not be handled and are thus
// not sent down the plugin chain.
func Report(server string, req request.Request, zone, rcode, plugin string, size int, start time.Time) {
func Report(server string, req request.Request, zone, view, rcode, plugin string, size int, start time.Time) {
// Proto and Family.
net := req.Proto()
fam := "1"
@@ -18,16 +18,16 @@ func Report(server string, req request.Request, zone, rcode, plugin string, size
}
if req.Do() {
RequestDo.WithLabelValues(server, zone).Inc()
RequestDo.WithLabelValues(server, zone, view).Inc()
}
qType := qTypeString(req.QType())
RequestCount.WithLabelValues(server, zone, net, fam, qType).Inc()
RequestCount.WithLabelValues(server, zone, view, net, fam, qType).Inc()
RequestDuration.WithLabelValues(server, zone).Observe(time.Since(start).Seconds())
RequestDuration.WithLabelValues(server, zone, view).Observe(time.Since(start).Seconds())
ResponseSize.WithLabelValues(server, zone, net).Observe(float64(size))
RequestSize.WithLabelValues(server, zone, net).Observe(float64(req.Len()))
ResponseSize.WithLabelValues(server, zone, view, net).Observe(float64(size))
RequestSize.WithLabelValues(server, zone, view, net).Observe(float64(req.Len()))
ResponseRcode.WithLabelValues(server, zone, rcode, plugin).Inc()
ResponseRcode.WithLabelValues(server, zone, view, rcode, plugin).Inc()
}

12
plugin/metrics/vars/vars.go
View File

@@ -14,7 +14,7 @@ var (
Subsystem: subsystem,
Name: "requests_total",
Help: "Counter of DNS requests made per zone, protocol and family.",
}, []string{"server", "zone", "proto", "family", "type"})
}, []string{"server", "zone", "view", "proto", "family", "type"})
RequestDuration = promauto.NewHistogramVec(prometheus.HistogramOpts{
Namespace: plugin.Namespace,
@@ -22,7 +22,7 @@ var (
Name: "request_duration_seconds",
Buckets: plugin.TimeBuckets,
Help: "Histogram of the time (in seconds) each request took per zone.",
}, []string{"server", "zone"})
}, []string{"server", "zone", "view"})
RequestSize = promauto.NewHistogramVec(prometheus.HistogramOpts{
Namespace: plugin.Namespace,
@@ -30,14 +30,14 @@ var (
Name: "request_size_bytes",
Help: "Size of the EDNS0 UDP buffer in bytes (64K for TCP) per zone and protocol.",
Buckets: []float64{0, 100, 200, 300, 400, 511, 1023, 2047, 4095, 8291, 16e3, 32e3, 48e3, 64e3},
}, []string{"server", "zone", "proto"})
}, []string{"server", "zone", "view", "proto"})
RequestDo = promauto.NewCounterVec(prometheus.CounterOpts{
Namespace: plugin.Namespace,
Subsystem: subsystem,
Name: "do_requests_total",
Help: "Counter of DNS requests with DO bit set per zone.",
}, []string{"server", "zone"})
}, []string{"server", "zone", "view"})
ResponseSize = promauto.NewHistogramVec(prometheus.HistogramOpts{
Namespace: plugin.Namespace,
@@ -45,14 +45,14 @@ var (
Name: "response_size_bytes",
Help: "Size of the returned response in bytes.",
Buckets: []float64{0, 100, 200, 300, 400, 511, 1023, 2047, 4095, 8291, 16e3, 32e3, 48e3, 64e3},
}, []string{"server", "zone", "proto"})
}, []string{"server", "zone", "view", "proto"})
ResponseRcode = promauto.NewCounterVec(prometheus.CounterOpts{
Namespace: plugin.Namespace,
Subsystem: subsystem,
Name: "responses_total",
Help: "Counter of response status codes.",
}, []string{"server", "zone", "rcode", "plugin"})
}, []string{"server", "zone", "view", "rcode", "plugin"})
Panic = promauto.NewCounter(prometheus.CounterOpts{
Namespace: plugin.Namespace,