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Monitoring Libp2p

Libp2p is one of most commonly used libraries across web3 infrasture. It exposes several metrics compatible with Prometheus.

The official github repo has Grafana dashboard json for a quick start.

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#!/bin/bash
ip neigh show dev wlan0

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1. Set screen blanking: sudo raspi-config nonint do_blanking 0
2. Set lingering: sudo loginctl enable-linger $(whoami)
3. If above two does not work sudo setterm -powerdown 0 and sudo setterm -powersave off

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# Using this composer in the machines that a specific app runs which opens the port for prometheus
# Using promtail collect logs and publish to external loki
version: '3.8'

networks:
  monitoring:
    driver: bridge

services:
  cadvisor:

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Untar remote file to local directory

Downloading a tar.gz file and extracting it after the download completes might consume a lot of disk space and time. It is possible to write tar.gz file directly as input to tar command and untar it to directory directly from remote url.

wget -qO- your_link_here | tar -xvz -C /target/directory

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# Create the folder to mount drive 
sudo mkdir /mnt/storage

# Set user/group perms to write
chown -R pi:pi /mnt/storage

# find the driver properties
sudo blkid

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sudo sysctl -w kern.maxfiles=75000
sudo sysctl -w kern.maxfilesperproc=75000
ulimit -S -n 75000

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FROM golang:1.13 as build

WORKDIR /app

COPY go.mod go.sum ./
RUN GO111MODULE=on go mod download

COPY . .
RUN CGO_ENABLED=0 go build -v

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package stack

type Stack struct {
	*node
}

type node struct {
	value string
	next  *node
}