notes

EBPF Study

环境搭建 | BCC | Libbpf | Prometheus

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tcprtt

BCC & Prometheus

Setup

sudo pip install prometheus-client

Start exporter

sudo python ./prometheus/bcc/tcprtt_exporter.py

Now you can access http://127.0.0.1:8000/metrics to see the metrics.

edit config file

# prometheus.yml
scrape_configs:
  - job_name: "prometheus"

    static_configs:
      - targets: ["localhost:9090"]

  - job_name: "tcprtt"

    static_configs:
      - targets: ["localhost:8000"]

start prometheus server

# In your prometheus installation path
./prometheus --config.file=prometheus.yml

Libbpf & Prometheus

Setup

Follow this steps to install Prometheus-CPP.

If following situation happens while running your project:

libprometheus-cpp-pull.so.1.1: cannot open shared object file

This might happen if you have recently installed a shared library and didn't run ldconfig

sudo ldconfig

You can also install as a static library

cmake .. -DBUILD_SHARED_LIBS=OFF

Build exporter

cd ./prometheus/libbpf

make

sudo ./prometheus/dist/tcprtt

# HELP tcp_rtt Round Trip Time
# TYPE tcp_rtt histogram
tcp_rtt_count{address="all"} 313
tcp_rtt_sum{address="all"} 1022544
tcp_rtt_bucket{address="all",le="1"} 0
tcp_rtt_bucket{address="all",le="2"} 0
tcp_rtt_bucket{address="all",le="4"} 0
tcp_rtt_bucket{address="all",le="8"} 0
tcp_rtt_bucket{address="all",le="16"} 38
tcp_rtt_bucket{address="all",le="32"} 107
tcp_rtt_bucket{address="all",le="64"} 152
tcp_rtt_bucket{address="all",le="128"} 158
tcp_rtt_bucket{address="all",le="256"} 158
tcp_rtt_bucket{address="all",le="512"} 158
tcp_rtt_bucket{address="all",le="1024"} 161
tcp_rtt_bucket{address="all",le="2048"} 167
tcp_rtt_bucket{address="all",le="4096"} 192
tcp_rtt_bucket{address="all",le="8192"} 267
tcp_rtt_bucket{address="all",le="16384"} 313
tcp_rtt_bucket{address="all",le="32768"} 313
tcp_rtt_bucket{address="all",le="65536"} 313
tcp_rtt_bucket{address="all",le="131072"} 313
tcp_rtt_bucket{address="all",le="262144"} 313
tcp_rtt_bucket{address="all",le="524288"} 313
tcp_rtt_bucket{address="all",le="1048576"} 313
tcp_rtt_bucket{address="all",le="2097152"} 313
tcp_rtt_bucket{address="all",le="4194304"} 313
tcp_rtt_bucket{address="all",le="8388608"} 313
tcp_rtt_bucket{address="all",le="16777216"} 313
tcp_rtt_bucket{address="all",le="33554432"} 313
tcp_rtt_bucket{address="all",le="67108864"} 313
tcp_rtt_bucket{address="all",le="134217728"} 313
tcp_rtt_bucket{address="all",le="+Inf"} 313