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DNS checks
DNS or domain name servers resolve a domain such as grafana.com to an IP address. This check ensures a domain resolves and measures the average time for the resolution to happen. DNS checks can be set up to validate against a specific DNS server and check for a specific kind of response.
Options
DNS checks have the following additional settings:
| Option name | Description |
|---|---|
| Record type | The resource record to query |
| Server | The nameserver to query |
| Port | The port used to connect to the server |
| Protocol | The protocol (TCP, UDP) used to connect to the server |
| Valid response codes | The set of response codes to accept |
| Valid response matches | A series of validations to apply to the response |
| IP version | The Internet Procotol version to use (V4, V6 or any) |
These configuration options do not produce any additional labels in the resulting metrics.
Metrics
| Metric name | Description |
|---|---|
| probe_all_duration_seconds | Returns how long the probe took to complete in seconds (histogram) |
| probe_all_success | Displays whether or not the probe was a success (summary) |
| probe_dns_additional_rrs | Returns number of entries in the additional resource record list |
| probe_dns_answer_rrs | Returns number of entries in the answer resource record list |
| probe_dns_authority_rrs | Returns number of entries in the authority resource record list |
| probe_dns_duration_seconds | Duration of DNS request by phase |
| probe_dns_lookup_time_seconds | Returns the time taken for probe dns lookup in seconds |
| probe_dns_query_succeeded | Displays whether or not the query was executed successfully |
| probe_duration_seconds | Returns how long the probe took to complete in seconds |
| probe_ip_addr_hash | Specifies the hash of IP address. It’s useful to detect if the IP address changes. |
| probe_ip_protocol | Specifies whether probe ip protocol is IP4 or IP6 |
| probe_success | Displays whether or not the probe was a success |
| sm_check_info | Provides information about a single check configuration |
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