Added support for NS records to discovery.dns

CHANGELOG.md

@@ -32,6 +32,8 @@ Main (unreleased)
 
 - Allow override debug metrics level for `otelcol.*` components. (@hainenber)
 
+- Added support for NS records to `discovery.dns`. (@djcode)
+
 ### Bugfixes
 
 - Fix panic when component ID contains `/` in `otelcomponent.MustNewType(ID)`.(@qclaogui)

docs/sources/reference/components/discovery.dns.md

@@ -20,12 +20,12 @@ discovery.dns "LABEL" {
 
 The following arguments are supported:
 
-Name               | Type           | Description                                                      | Default | Required
--------------------|----------------|------------------------------------------------------------------|---------|---------
-`names`            | `list(string)` | DNS names to look up.                                            |         | yes
-`port`             | `number`       | Port to use for collecting metrics. Not used for SRV records.    | `0`     | no
-`refresh_interval` | `duration`     | How often to query DNS for updates.                              | `"30s"` | no
-`type`             | `string`       | Type of DNS record to query. Must be one of SRV, A, AAAA, or MX. | `"SRV"` | no
+Name               | Type           | Description                                                          | Default | Required
+-------------------|----------------|----------------------------------------------------------------------|---------|---------
+`names`            | `list(string)` | DNS names to look up.                                                |         | yes
+`port`             | `number`       | Port to use for collecting metrics. Not used for SRV records.        | `0`     | no
+`refresh_interval` | `duration`     | How often to query DNS for updates.                                  | `"30s"` | no
+`type`             | `string`       | Type of DNS record to query. Must be one of SRV, A, AAAA, MX, or NS. | `"SRV"` | no
 
 ## Exported fields
 
@@ -41,7 +41,7 @@ Each target includes the following labels:
 * `__meta_dns_srv_record_target`: Target field of the SRV record.
 * `__meta_dns_srv_record_port`: Port field of the SRV record.
 * `__meta_dns_mx_record_target`: Target field of the MX record.
-
+* `__meta_dns_ns_record_target`: Target field of the NS record.
 
 ## Component health
 

internal/component/discovery/dns/dns.go

@@ -49,7 +49,7 @@ func (args *Arguments) SetToDefault() {
 func (args *Arguments) Validate() error {
 	switch strings.ToUpper(args.Type) {
 	case "SRV":
-	case "A", "AAAA", "MX":
+	case "A", "AAAA", "MX", "NS":
 		if args.Port == 0 {
 			return errors.New("a port is required in DNS-SD configs for all record types except SRV")
 		}