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Add probe_dns_flag_do metric #1216

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Add probe_dns_flag_do metric #1216

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12 changes: 12 additions & 0 deletions prober/dns.go
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Original file line number Diff line number Diff line change
Expand Up @@ -141,6 +141,10 @@ func ProbeDNS(ctx context.Context, target string, module config.Module, registry
Name: "probe_dns_additional_rrs",
Help: "Returns number of entries in the additional resource record list",
})
probeDNSFlagDo := prometheus.NewGauge(prometheus.GaugeOpts{
Name: "probe_dns_flag_do",
Help: "Returns whether or not the query had the DNSSEC OK flag set",
})
probeDNSQuerySucceeded := prometheus.NewGauge(prometheus.GaugeOpts{
Name: "probe_dns_query_succeeded",
Help: "Displays whether or not the query was executed successfully",
Expand All @@ -154,6 +158,7 @@ func ProbeDNS(ctx context.Context, target string, module config.Module, registry
registry.MustRegister(probeDNSAnswerRRSGauge)
registry.MustRegister(probeDNSAuthorityRRSGauge)
registry.MustRegister(probeDNSAdditionalRRSGauge)
registry.MustRegister(probeDNSFlagDo)
registry.MustRegister(probeDNSQuerySucceeded)

qc := uint16(dns.ClassINET)
Expand Down Expand Up @@ -257,6 +262,7 @@ func ProbeDNS(ctx context.Context, target string, module config.Module, registry
msg.RecursionDesired = module.DNS.Recursion
msg.Question = make([]dns.Question, 1)
msg.Question[0] = dns.Question{dns.Fqdn(module.DNS.QueryName), qt, qc}
msg.SetEdns0(client.UDPSize, true)

logger.Info("Making DNS query", "target", targetIP, "dial_protocol", dialProtocol, "query", module.DNS.QueryName, "type", qt, "class", qc)
timeoutDeadline, _ := ctx.Deadline()
Expand All @@ -280,6 +286,12 @@ func ProbeDNS(ctx context.Context, target string, module config.Module, registry
probeDNSAdditionalRRSGauge.Set(float64(len(response.Extra)))
probeDNSQuerySucceeded.Set(1)

if opt := response.IsEdns0(); opt != nil && opt.Do() {
probeDNSFlagDo.Set(1)
} else {
probeDNSFlagDo.Set(0)
}

if qt == dns.TypeSOA {
probeDNSSOAGauge = prometheus.NewGauge(prometheus.GaugeOpts{
Name: "probe_dns_serial",
Expand Down