D Morty k DekusDenial

Fluent-bit rocks

A short survey of log collection options and why you picked the wrong one. 😜

Who am I? Where am I from?

I'm Steve Coffman and I work at Ithaka. We do JStor (academic journals) and other stuff. How big is it?

Number	what it means
101,332,633	unique visitors in 2017

Here's an example of how to debug Mocha v4 if it hangs.

Ensure you're using a Node.js 8 or newer (or any version with async_hooks support).

If you run your test, you'll notice it hangs:

$ mocha test.js

Go (Golang) GOOS and GOARCH

All of the following information is based on go version go1.17.1 darwin/amd64.

GOOS Values

GOOS	Out of the Box
`aix`	✅
`android`	✅

How to Change Open Files Limit on OS X and macOS

This text is the section about OS X Yosemite (which also works for macOS Sierra) from https://docs.basho.com/riak/kv/2.1.4/using/performance/open-files-limit/#mac-os-x

The last time i visited this link it was dead (403), so I cloned it here from the latest snapshot in Archive.org's Wayback Machine https://web.archive.org/web/20170523131633/https://docs.basho.com/riak/kv/2.1.4/using/performance/open-files-limit/

Mac OS X

To check the current limits on your Mac OS X system, run:

Configuring AWS ECS to have access to AWS EFS

If you would like to persist data from your ECS containers, i.e. hosting databases like MySQL or MongoDB with Docker, you need to ensure that you can mount the data directory of the database in the container to volume that's not going to dissappear when your container or worse yet, the EC2 instance that hosts your containers, is restarted or scaled up or down for any reason.

Don't know how to create your own AWS ECS Cluster? Go here!

New Cluster

Sadly the EC2 provisioning process doesn't allow you to configure EFS during the initial config. After your create your cluster, follow the guide below.

New Task Definition for Web App

If you're using an Alpine-based Node server like duluca/minimal-node-web-server follow this guide:

AWS CLI JMESPath cheatsheet

Random query recipes of JMESPath for the AWS CLI tools that I might have written or stumbled upon.

Examples

Semantic Commit Messages

See how a minor change to your commit message style can make you a better programmer.

Format: <type>(<scope>): <subject>

<scope> is optional

	# Snippet of code to be put on ~/.bash_profile to help SSH into instances via Session Manager while specifying AWS profiles
	# It can be used by saving ~/.ssm_bash_profile and adding the following line to ~/.bash_profile
	# source ~/.ssm_bash_profile

	function aws-ssm-instance-list {
	if [ "$#" -lt 1 ]; then
	echo "Usage: aws-ssm-instance-list <profile name>"
	else
	output=$(aws ssm describe-instance-information --profile $1 --query "InstanceInformationList[*].{Name:ComputerName,Id:InstanceId,IPAddress:IPAddress}" --output text)
	echo "$output"

	/*
	Let us re-create `Promise.all`

	`Promise.all` method returns a promise that resolves when all of the promises in the iterable argument have resolved,
	or rejects with the reason of the first passed promise that rejects.

	Read more about `Promise.all` on MDN: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise/all

	A basic example would be something like this:

	package main

	// The aim of this example is to illustrate backpressure using golang channels and go routines.
	//
	// This is the basis for a simple data processing service which could either be reading from
	// some internal queue or a socket of some sort.

	import (
	"fmt"
	"math/rand"