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Metrics
Review default metrics that are available in Prometheus so that you can monitor the health of Gloo Network components.
View metrics
To view all metrics that are available in Prometheus, follow these steps:
Port-forward the Prometheus pod in your cluster.
Open the Prometheus expression browser to run PromQL queries on metrics.
Default metrics
If you followed the Get started guide to install Gloo Network, the Gloo telemetry pipeline is automatically set up for you. The Gloo telemetry pipeline collects the following metrics that are required for the Gloo UI Graph. Prometheus scrapes the Gloo telemetry gateway and collector agent to feed other Gloo observability tools. You can also use the Prometheus expression browser to run PromQL queries on these metrics.
Cilium metrics
| Metric | Description |
|---|---|
cilium_bpf_map_pressure | The ratio of the required map size compared to its configured size. Values that are greater than or equal to 1.0 indicate that the map is full. |
cilium_drop_count_total | The total number of dropped packages. |
cilium_endpoint_regeneration_time_stats_seconds | The total time in seconds that the Cilium agent needed to generate Cilium endpoints. |
cilium_identity | The number of identities that are currently allocated. |
cilium_node_connectivity_status | The connectivity status of each node in the cluster. |
cilium_operator_ipam_ips | The total number of used IP addresses that are currently in use. |
cilium_policy_endpoint_enforcement_status | The number of endpoints that are labeled by the policy enforcement status. |
cilium_unreachable_nodes | The number of nodes that are not reachable. |
hubble_flows_processed_total | The total number of network flows that were processed by the Cilium agent. |
hubble_drop_total | The total number of packages that were dropped by the Cilium agent. |
Gloo management server metrics
| Metric | Description |
|---|---|
gloo_mesh_build_snapshot_metric_time_sec | The time in seconds for the Gloo management server to generate an output snapshot for connected Gloo agents. |
gloo_mesh_garbage_collection_time_sec | The time it takes for the garbage collector to clean up unused resources in seconds, such as after the custom resource translation. |
gloo_mesh_reconciler_time_sec_bucket | The time the Gloo management server needs to sync with the Gloo agents in the workload clusters to apply the translated resources. This metric is captured in seconds for the following intervals (buckets): 1, 2, 5, 10, 15, 30, 50, 80, 100, 200. |
gloo_mesh_redis_relation_err | The number of errors that occured during a read or write operation of relationship data to Redis. |
gloo_mesh_redis_sync_err | The number of times the Gloo mangement server could not read from or write to the Gloo Redis instance. |
gloo_mesh_redis_write_time_sec | The time it takes in seconds for the Gloo mangement server to write to the Redis database. |
gloo_mesh_relay_client_delta_pull_time_sec | The time it takes for a Gloo agent to receive a delta output snapshot from the Gloo management server in seconds. |
gloo_mesh_relay_client_delta_pull_err | The number of errors that occured while sending a delta output snapshot to a connected Gloo agent. |
gloo_mesh_relay_client_delta_push_time_sec | The time it takes for a Gloo agent to send a delta input snapshot to the Gloo management server in seconds. |
gloo_mesh_relay_client_delta_push_err | The number of errors that occured while sending a delta input snapshot from the Gloo agent to the Gloo management server. |
gloo_mesh_snapshot_upserter_op_time_sec | The time it takes for a snapshot to be updated and/or inserted in the Gloo management server local memory in seconds. |
gloo_mesh_safe_mode_active | Indicates whether safe mode is enabled in the Gloo management server. For more information, see Redis safe mode options. |
gloo_mesh_translation_time_sec_bucket | The time the Gloo management server needs to translate Gloo resources into Istio, Envoy, or Cilium resources. This metric is captured in seconds for the following intervals (buckets): 1, 2, 5, 10, 15, 20, 25, 30, 45, 60, and 120. |
gloo_mesh_translator_concurrency | The number of translation operations that the Gloo management server can perform at the same time. |
object_write_fails_total | The number of times the Gloo agent tried to write invalid Istio configuration to the cluster that was rejected by the Istio control plane istiod. |
relay_pull_clients_connected | The number of Gloo agents that are connected to the Gloo management server. |
relay_push_clients_warmed | The number of Gloo agents that are ready to accept updates from the Gloo management server. |
solo_io_gloo_gateway_license | The number of minutes until the Gloo Gateway license expires. To prevent your management server from crashing when the license expires, make sure to upgrade the license before expiration. |
solo_io_gloo_mesh_license | The number of minutes until the Gloo Gateway license expires. To prevent your management server from crashing when the license expires, make sure to upgrade the license before expiration. |
solo_io_gloo_network_license | The number of minutes until the Gloo Network for Cilium license expires. To prevent your management server from crashing when the license expires, make sure to upgrade the license before expiration. |
translation_error | The number of translation errors that were reported by the Gloo management server. |
translation_warning | The number of translation warnings that were reported by the Gloo management server. |
Gloo telemetry pipeline metrics
| Metric | Description |
|---|---|
otelcol_processor_refused_metric_points | The number of metrics that were refused by the Gloo telemetry pipeline processor. For example, metrics might be refused to prevent collector agents from being overloaded in the case of insufficient memory resources. |
otelcol_receiver_refused_metric_points | The number of metrics that were refused by the Gloo telemetry pipeline receiver. For example, metrics might be refused to prevent collector agents from being overloaded in the case of insufficient memory resources. |
otelcol_processor_refused_spans | The metric spans that were refused by the memory_limiter in the Gloo telemetry pipeline to prevent collector agents from being overloaded. |
otelcol_exporter_queue_capacity | The amount of telemetry data that can be stored in memory while waiting on a worker in the collector agent to become available to send the data. |
otelcol_exporter_queue_size | The amount of telemetry data that is currently stored in memory. If the size is equal or larger than otelcol_exporter_queue_capacity, new telemetry data is rejected. |
otelcol_loadbalancer_backend_latency | The time the collector agents need to export telemetry data. |
otelcol_exporter_send_failed_spans | The number of telemetry data spans that could not be sent to a backend. |
Metric labels
To reduce cardinality in the Gloo telemetry pipeline, only the following labels are collected for each metric.
| Metric group | Labels |
|---|---|
| Istio | [“cluster”, “collector_pod” , “connection_security_policy”, “destination_cluster”, “destination_principal”, “destination_service”, “destination_workload”, “destination_workload_id”, “destination_workload_namespace”, “gloo_mesh”, “namespace”, “pod_name”, “reporter”, “response_code”, “source_cluster”, “source_principal”, “source_workload”, “source_workload_namespace”, “version”, “workload_id”] |
| Telemetry pipeline | [“app”, “cluster”, “collector_name”, “collector_pod”, “component”, “exporter”, “namespace”, “pod_template_generation”, “processor”, “service_version”] |
| Hubble | [“app”, “cluster”, “collector_pod”, “component”, “destination”, “destination_cluster”, “destination_pod”, “destination_workload”, “destination_workload_id”, “destination_workload_namespace”, “k8s_app”, “namespace”, “pod”, “protocol”, “source”, “source_cluster”, “source_pod”, “source_workload”, “source_workload_namespace”, “subtype”, “type”, “verdict”, “workload_id”] |
| Cilium (if enabled in Gloo telemetry pipeline) | [“action”, “address_type”, “api_call”, “app”, “arch”, “area”, “cluster”, “collector_pod”, “component”, “direction”, “endpoint_state”, “enforcement”, “equal”, “error”, “event_type”, “family”, “k8s_app”, “le”, “level”, “map_name”, “method”, “name”, “namespace”, “operation”, “outcome”, “path”, “pod”, “pod_template_generation”, “protocol”, “reason”, “return_code”, “revision”, “scope”, “source”, “source_cluster”, “source_node_name”, “status”, “subsystem”, “target_cluster”, “target_node_ip”, “target_node_name”, “target_node_type”, “type”, “valid”, “value”, “version”] |
| eBPF (if enabled in Gloo telemetry pipeline) | [“app”, “client_addr”, “cluster”, “code”, “collector_pod”, “component”, “destination”, “local_addr”, “namespace”, “pod”, “pod_template_generation”, “remote_identity”, “server_identity”, “source”] |