16.2. メトリクスのクエリー

Red Hat build of Keycloak は、次のエンドポイントでメトリクスを公開します。

エンドポイントからの応答は、application/openmetrics-text コンテンツタイプを使用し、Prometheus (OpenMetrics) テキスト形式に基づいています。以下は、応答例の抜粋です。

# HELP base_gc_total Displays the total number of collections that have occurred. This attribute lists -1 if the collection count is undefined for this collector.
# TYPE base_gc_total counter
base_gc_total{name="G1 Young Generation",} 14.0
# HELP jvm_memory_usage_after_gc_percent The percentage of long-lived heap pool used after the last GC event, in the range [0..1]
# TYPE jvm_memory_usage_after_gc_percent gauge
jvm_memory_usage_after_gc_percent{area="heap",pool="long-lived",} 0.0
# HELP jvm_threads_peak_threads The peak live thread count since the Java virtual machine started or peak was reset
# TYPE jvm_threads_peak_threads gauge
jvm_threads_peak_threads 113.0
# HELP agroal_active_count Number of active connections. These connections are in use and not available to be acquired.
# TYPE agroal_active_count gauge
agroal_active_count{datasource="default",} 0.0
# HELP base_memory_maxHeap_bytes Displays the maximum amount of memory, in bytes, that can be used for memory management.
# TYPE base_memory_maxHeap_bytes gauge
base_memory_maxHeap_bytes 1.6781410304E10
# HELP process_start_time_seconds Start time of the process since unix epoch.
# TYPE process_start_time_seconds gauge
process_start_time_seconds 1.675188449054E9
# HELP system_load_average_1m The sum of the number of runnable entities queued to available processors and the number of runnable entities running on the available processors averaged over a period of time
# TYPE system_load_average_1m gauge
system_load_average_1m 4.005859375

...