[Yandex Cloud documentation](../index.md) > [Yandex SpeechKit Hybrid](index.md) > SpeechKit Hybrid administration > Envoy monitoring # Envoy service monitoring Envoy services is a collective name of the Envoy and License server SpeechKit Hybrid components For more information about the SpeechKit Hybrid components, see [SpeechKit Hybrid architecture](architecture.md). Envoy services collect and store metrics in Prometheus format. For more information about metric types, see [this Prometheus guide](https://prometheus.io/docs/concepts/metric_types/). ## License server metrics {#license-metrics} License server metrics are available at the URL: ```text : ``` Where: * ``: IP address of the License server SpeechKit Hybrid component in your network. * ``: Prometheus port. The default port is `8003`. You can change it in the SpeechKit Hybrid settings. ### Common metrics {#metrics-common} | Metric | Type | Description | Labels | |:------------------------|:----------|:----------------------------------------------------|:-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `active_services` | GAUGE | Number of running SpeechKit Hybrid services | `type`: Service type, `stt` / `tts`. | | `log4j2_appender_total` | COUNTER | Number of logs with this level. | `level`: [Logging level](operations/logging.md). | | `grpc_statuses` | COUNTER | gRPC method operating states | `app` (application), `method` (gRPC method), `status` (query status). To monitor the link with Yandex Billing, specify the `yandex.cloud.ds.billing.BillingService/Register` and `yandex.cloud.ds.billing.BillingService/SendBillingData` values in the `method` label. | | `grpc_durations` | HISTOGRAM | Histogram of the gRPC query processing time | `app` (application), `method` (gRPC method), `status` (query status). | | `grpc_requests` | GAUGE | Various metrics of gRPC queries | `app` (application), `method` (gRPC method), `status` (query status). | ### Metrics for the Cloud Billing license model {#metrics-cloud-billing} | Metric | Type | Description | Labels | |:---------------------------------------|:--------|:-------------------------------------------------------------------------------|:-----------------------------------------| | `billing_agent_billing_units_sent` | COUNTER | Count of billing packets sent to Yandex Billing | `unit_type`: Service type, `stt` / `tts`. | | `billing_agent_requests_sent` | COUNTER | Number of queries sent to the Cloud Billing server SpeechKit Hybrid | | | `billing_agent_entries_sent` | COUNTER | Number of billing records sent | | | `billing_agent_queue_size` | GAUGE | Current Cloud Billing queue size SpeechKit Hybrid | | | `billing_agent_billing_units_received` | COUNTER | Number of billing packets received from the `stt`/`tts` services. | `unit_type`: Service type, `stt` / `tts`. | | `billing_agent_last_entry_serial` | GAUGE | Serial number of the last billing record sent | | | `billing_agent_last_entry_unixtime` | GAUGE | Standard Unix time of the last billing record sent | | ### Metrics for the Yubikey license model {#metrics-yubikey} | Metric | Type | Description | Labels | |:---------------------|:------|:-------------------------------------------------------------------------|:------------------------------------------------------------------------------------------------------------------------------------------------------| | `license_active` | GAUGE | License status (`0` for inactive license, `1` for active one). | | | `license_parameters` | GAUGE | License options | `type`, parameter type. `max_stt_connections`: Maximum number of connections to `stt`; `max_tts_rps`: Maximum RPS for `tts`. | ## Envoy metrics {#envoy-metrics} To get information about the Envoy service status, use the administrative interface at the URL: ```text :9091 ``` Where: * ``: IP address of the Envoy SpeechKit Hybrid service in your network. For more information about the interface, see [this Envoy guide](https://www.envoyproxy.io/docs/envoy/latest/operations/admin). Envoy metrics in Prometheus format are available via the administrative interface at the URL: ```text :9091/stats/prometheus ``` {% note info %} To get only significant metrics that changed at least once, use this URL: `:9091/stats?format=prometheus&usedonly`. {% endnote %} Informative Envoy metrics for SpeechKit Hybrid monitoring: * [Upstream metrics](https://www.envoyproxy.io/docs/envoy/latest/configuration/upstream/cluster_manager/cluster_stats) for Envoy communications with the `stt`/`tts` service clusters. * [Downstream metrics](https://www.envoyproxy.io/docs/envoy/latest/configuration/http/http_conn_man/stats) for Envoy communications with external resources. For example: | Metric | Type | Description | Labels | |:-------------------------------|:--------|:----------------------------------------------------------------------|:-----------------------------------------------------------------------------------------------------| | `downstream_cx_total` | COUNTER | Number of HTTP connections during the service operation | `envoy_http_conn_manager_prefix` | | `downstream_cx_active` | GAUGE | Number of active HTTP connections. | `envoy_cluster_name`: Cluster name: `upstream_stt`, `upstream_tts` for SpeechKit Hybrid services. | | `downstream_cx_rx_bytes_total` | COUNTER | Amount of information received (in bytes) during the service operation | `envoy_http_conn_manager_prefix` | | `downstream_cx_tx_bytes_total` | COUNTER | Amount of information sent (in bytes) during the service operation | `envoy_http_conn_manager_prefix` | | `downstream_rq_total` | COUNTER | Numbers of queries sent during the service operation | `envoy_http_conn_manager_prefix` | | `downstream_rq_active` | GAUGE | Number of active queries. | `envoy_http_conn_manager_prefix` |