tower-trace-metrics

A tower-http TraceLayer that records metrics using the metrics facade.

use tower_trace_metrics::make_layer;
use tower::ServiceBuilder;
use bytes;


fn main() {
    let service = ServiceBuilder::new()
        // Make a trace layer where the chunks are bytes::Bytes
        .layer(make_layer(|b: &bytes::Bytes| b.len() as u64));
    // ... Use this service in a Tower middleware stack.
}

记录的度量

• http_request_counter 所有请求的总数
• http_request_failure_counter 所有请求失败的总数
• http_request_size_bytes_hist 请求大小的字节直方图
• http_request_request_time_micros_hist 请求时间的微秒直方图

每个度量都按请求的 path、method 和 host 分面。