# Prometheus scrape Metrics {% hint style="info" %} **Supported event types:** `metrics` {% endhint %} Fluent Bit 1.9 and later includes additional metrics features to let you collect logs and metrics from a Prometheus-based endpoint at a set interval. These metrics can be routed to metric supported endpoints such as [Prometheus Exporter](https://docs.fluentbit.io/manual/data-pipeline/outputs/prometheus-exporter), [InfluxDB](https://docs.fluentbit.io/manual/data-pipeline/outputs/influxdb) or [Prometheus Remote Write](https://docs.fluentbit.io/manual/data-pipeline/outputs/prometheus-remote-write). ## Configuration | Key | Description | Default | | ----------------- | ------------------------------------------------------------------------------------------------------------------------------- | ----------- | | `bearer_token` | Set the bearer token for authentication with the Prometheus endpoint. | *none* | | `buffer_max_size` | Set the maximum buffer size for the HTTP response. | `10M` | | `host` | The host of the Prometheus metric endpoint to scrape. | `localhost` | | `http_passwd` | Set the password for HTTP basic authentication. | `""` | | `http_user` | Set the username for HTTP basic authentication. | *none* | | `metrics_path` | The metrics URI endpoint, which must start with a forward slash (`/`). Parameters can be added to the path by using `?` | `/metrics` | | `port` | The port of the Prometheus metric endpoint to scrape. | `9100` | | `scrape_interval` | The interval to scrape metrics. | `10s` | | `threaded` | Indicates whether to run this input in its own [thread](https://docs.fluentbit.io/manual/administration/multithreading#inputs). | `false` | ### TLS configuration This plugin supports TLS/SSL for secure connections to HTTPS endpoints. For detailed TLS configuration options, refer to the [TLS/SSL](https://docs.fluentbit.io/manual/administration/transport-security) documentation section. ## Example If an endpoint exposes Prometheus Metrics you can specify the configuration to scrape and then output the metrics. The following example retrieves metrics from the HashiCorp Vault application. {% tabs %} {% tab title="fluent-bit.yaml" %} ```yaml pipeline: inputs: - name: prometheus_scrape host: 0.0.0.0 port: 8201 tag: vault metrics_path: /v1/sys/metrics?format=prometheus scrape_interval: 10s outputs: - name: stdout match: '*' ``` {% endtab %} {% tab title="fluent-bit.conf" %} ``` [INPUT] name prometheus_scrape host 0.0.0.0 port 8201 tag vault metrics_path /v1/sys/metrics?format=prometheus scrape_interval 10s [OUTPUT] name stdout match * ``` {% endtab %} {% endtabs %} This returns output similar to: ``` ... 2022-03-26T23:01:29.836663788Z go_memstats_alloc_bytes_total = 31891336 2022-03-26T23:01:29.836663788Z go_memstats_frees_total = 313264 2022-03-26T23:01:29.836663788Z go_memstats_lookups_total = 0 2022-03-26T23:01:29.836663788Z go_memstats_mallocs_total = 378992 2022-03-26T23:01:29.836663788Z process_cpu_seconds_total = 1.6200000000000001 2022-03-26T23:01:29.836663788Z go_goroutines = 19 2022-03-26T23:01:29.836663788Z go_info{version="go1.17.7"} = 1 2022-03-26T23:01:29.836663788Z go_memstats_alloc_bytes = 12547800 2022-03-26T23:01:29.836663788Z go_memstats_buck_hash_sys_bytes = 1468900 2022-03-26T23:01:29.836663788Z go_memstats_gc_cpu_fraction = 8.1509688352783453e-06 2022-03-26T23:01:29.836663788Z go_memstats_gc_sys_bytes = 5875576 2022-03-26T23:01:29.836663788Z go_memstats_heap_alloc_bytes = 12547800 2022-03-26T23:01:29.836663788Z go_memstats_heap_idle_bytes = 2220032 2022-03-26T23:01:29.836663788Z go_memstats_heap_inuse_bytes = 14000128 2022-03-26T23:01:29.836663788Z go_memstats_heap_objects = 65728 2022-03-26T23:01:29.836663788Z go_memstats_heap_released_bytes = 2187264 2022-03-26T23:01:29.836663788Z go_memstats_heap_sys_bytes = 16220160 2022-03-26T23:01:29.836663788Z go_memstats_last_gc_time_seconds = 1648335593.2483871 2022-03-26T23:01:29.836663788Z go_memstats_mcache_inuse_bytes = 2400 2022-03-26T23:01:29.836663788Z go_memstats_mcache_sys_bytes = 16384 2022-03-26T23:01:29.836663788Z go_memstats_mspan_inuse_bytes = 150280 2022-03-26T23:01:29.836663788Z go_memstats_mspan_sys_bytes = 163840 2022-03-26T23:01:29.836663788Z go_memstats_next_gc_bytes = 16586496 2022-03-26T23:01:29.836663788Z go_memstats_other_sys_bytes = 422572 2022-03-26T23:01:29.836663788Z go_memstats_stack_inuse_bytes = 557056 2022-03-26T23:01:29.836663788Z go_memstats_stack_sys_bytes = 557056 2022-03-26T23:01:29.836663788Z go_memstats_sys_bytes = 24724488 2022-03-26T23:01:29.836663788Z go_threads = 8 2022-03-26T23:01:29.836663788Z process_max_fds = 65536 2022-03-26T23:01:29.836663788Z process_open_fds = 12 2022-03-26T23:01:29.836663788Z process_resident_memory_bytes = 200638464 2022-03-26T23:01:29.836663788Z process_start_time_seconds = 1648333791.45 2022-03-26T23:01:29.836663788Z process_virtual_memory_bytes = 865849344 2022-03-26T23:01:29.836663788Z process_virtual_memory_max_bytes = 1.8446744073709552e+19 2022-03-26T23:01:29.836663788Z vault_runtime_alloc_bytes = 12482136 2022-03-26T23:01:29.836663788Z vault_runtime_free_count = 313256 2022-03-26T23:01:29.836663788Z vault_runtime_heap_objects = 65465 2022-03-26T23:01:29.836663788Z vault_runtime_malloc_count = 378721 2022-03-26T23:01:29.836663788Z vault_runtime_num_goroutines = 12 2022-03-26T23:01:29.836663788Z vault_runtime_sys_bytes = 24724488 2022-03-26T23:01:29.836663788Z vault_runtime_total_gc_pause_ns = 1917611 2022-03-26T23:01:29.836663788Z vault_runtime_total_gc_runs = 19 ... ```