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Add descriptions about systemd-resolved option #123

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44 changes: 27 additions & 17 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -56,6 +56,7 @@ Name | Description |
--systemd.collector.enable-restart-count | Enables service restart count metrics. This feature only works with systemd 235 and above.
--systemd.collector.enable-file-descriptor-size | Enables file descriptor size metrics. Systemd Exporter needs access to /proc/X/fd files.
--systemd.collector.enable-ip-accounting | Enables service ip accounting metrics. This feature only works with systemd 235 and above.
--systemd.collector.enable-resolved | Enable systemd-resolved metrics.

Of note, there is no customized support for `.snapshot` (removed in systemd v228), `.busname` (only present on systems using kdbus), `generated` (created via generators), `transient` (created during systemd-run) have no special support.

Expand Down Expand Up @@ -83,23 +84,32 @@ PromQL grouping queries (e.g. `count(systemd_unit_state) by (type)`)

Note that a number of unit types are filtered by default

| Metric name | Metric type | Status | Cardinality |
| ----------------------------------------- | ----------- | -------- | ------------------------------------------------------------------ |
| systemd_exporter_build_info | Gauge | UNSTABLE | 1 per systemd-exporter |
| systemd_unit_info | Gauge | UNSTABLE | 1 per service + 1 per mount |
| systemd_unit_state | Gauge | UNSTABLE | 5 per unit {state="activating/active/deactivating/failed/inactive} |
| systemd_unit_tasks_current | Gauge | UNSTABLE | 1 per service |
| systemd_unit_tasks_max | Gauge | UNSTABLE | 1 per service |
| systemd_unit_start_time_seconds | Gauge | UNSTABLE | 1 per service |
| systemd_service_restart_total | Gauge | UNSTABLE | 1 per service |
| systemd_service_ip_ingress_bytes | Counter | UNSTABLE | 1 per service |
| systemd_service_ip_egress_bytes | Counter | UNSTABLE | 1 per service |
| systemd_service_ip_ingress_packets_total | Counter | UNSTABLE | 1 per service |
| systemd_service_ip_egress_packets_total | Counter | UNSTABLE | 1 per service |
| systemd_socket_accepted_connections_total | Counter | UNSTABLE | 1 per socket |
| systemd_socket_current_connections | Gauge | UNSTABLE | 1 per socket |
| systemd_socket_refused_connections_total | Gauge | UNSTABLE | 1 per socket |
| systemd_timer_last_trigger_seconds | Gauge | UNSTABLE | 1 per timer |
| Metric name | Metric type | Status | Cardinality |
| ------------------------------------------ | ----------- | -------- | ------------------------------------------------------------------ |
| systemd_exporter_build_info | Gauge | UNSTABLE | 1 per systemd-exporter |
| systemd_unit_info | Gauge | UNSTABLE | 1 per service + 1 per mount |
| systemd_unit_state | Gauge | UNSTABLE | 5 per unit {state="activating/active/deactivating/failed/inactive} |
| systemd_unit_tasks_current | Gauge | UNSTABLE | 1 per service |
| systemd_unit_tasks_max | Gauge | UNSTABLE | 1 per service |
| systemd_unit_start_time_seconds | Gauge | UNSTABLE | 1 per service |
| systemd_service_restart_total | Gauge | UNSTABLE | 1 per service |
| systemd_service_ip_ingress_bytes | Counter | UNSTABLE | 1 per service |
| systemd_service_ip_egress_bytes | Counter | UNSTABLE | 1 per service |
| systemd_service_ip_ingress_packets_total | Counter | UNSTABLE | 1 per service |
| systemd_service_ip_egress_packets_total | Counter | UNSTABLE | 1 per service |
| systemd_socket_accepted_connections_total | Counter | UNSTABLE | 1 per socket |
| systemd_socket_current_connections | Gauge | UNSTABLE | 1 per socket |
| systemd_socket_refused_connections_total | Gauge | UNSTABLE | 1 per socket |
| systemd_timer_last_trigger_seconds | Gauge | UNSTABLE | 1 per timer |
| systemd_resolved_cache_hits_total | Counter | UNSTABLE | 1 per systemd-exporter |
| systemd_resolved_cache_misses_total | Counter | UNSTABLE | 1 per systemd-exporter |
| systemd_resolved_current_cache_size | Gauge | UNSTABLE | 1 per systemd-exporter |
| systemd_resolved_current_transactions | Gauge | UNSTABLE | 1 per systemd-exporter |
| systemd_resolved_transactions_total | Counter | UNSTABLE | 1 per systemd-exporter |
| systemd_resolved_dnssec_bogus_total | Counter | UNSTABLE | 1 per systemd-exporter |
| systemd_resolved_dnssec_indeterminate_total| Counter | UNSTABLE | 1 per systemd-exporter |
| systemd_resolved_dnssec_insecure_total | Counter | UNSTABLE | 1 per systemd-exporter |
| systemd_resolved_dnssec_secure_total | Counter | UNSTABLE | 1 per systemd-exporter |

## Configuration

Expand Down