Art Witczak artbikes

Nginx FastCGI response buffer sizes

By default when Nginx starts receiving a response from a FastCGI backend (such as PHP-FPM) it will buffer the response in memory before delivering it to the client. Any response larger than the set buffer size is saved to a temporary file on disk. This process is also explained at the Nginx ngx_http_fastcgi_module page document page.

Since disk is slow and memory is fast the aim is to get as many FastCGI responses passing through memory only. On the flip side we don't want to set an excessively large buffer as they are created and sized on a per request basis (it's not shared).

The related Nginx options are:

fastcgi_buffering appeared in Nginx 1.5.6 (1.6.0 stable) and can be used to turn buffering completely on/off. It's on by default.
[fastcgi_buffer_size](http://nginx.org/en/docs/http/ngx_ht

Puppet with Jenkins

Setup Jenkins

With Puppet:

puppet module install rtyler-jenkins

puppet apply -v -e "include jenkins"

Installing My Blog

I want to install Ghost as my blog. I want the web server, ghost, and OS, all to receive security updates on a regular schedule without me having to muck with it. (I am willing for the blog to sometimes go down because of this.)

I'll eventually want monitoring and alerting, and backups of the blog entries; uploads of the static site to my web hosting company; automatic DNS configuration; updates of the base OS. But for now I'm modest, I just want Ghost and I want updates.

I want to do this all with Chef. I want to write the Ghost cookbook myself, not because the existing Ghost cookbook is bad, but because I want to get a real feel for how these get written.

Getting Started: Test Kitchen

One-liners

Reverse every line:

Input file:

$ cat foo
qwe
123

bar

	#!/bin/bash
	set -e

	sudo rm -f /etc/update-motd.d/10-help-text
	sudo rm -f /etc/update-motd.d/51-cloudguest
	sudo rm -f /etc/update-motd.d/91-release-upgrade
	echo -e "[sysinfo]\nexclude_sysinfo_plugins = LandscapeLink" \| sudo tee /etc/landscape/client.conf

	echo deb https://get.docker.com/ubuntu docker main \| sudo tee /etc/apt/sources.list.d/docker.list
	sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 36A1D7869245C8950F966E92D8576A8BA88D21E9

	# Build dependencies for OpenResty.
	sudo apt-get install build-essential libpcre3-dev libssl-dev libgeoip-dev

	# Install standard Nginx first so that you get the relevant service scripts installed too
	sudo apt-get install nginx

	# If you want to access Postgres via Nginx
	sudo apt-get install libpq-dev

	.DS_Store

	logs/
	data/

	*.html

	#! /usr/bin/env python

	import argparse
	import logging
	import sys
	import time

	from itertools import islice

	import boto3

	#!/bin/bash

	DATE=`date +"%a"`
	DVOLNAME=datalv
	LVOLNAME=journallv
	VOLGR=datavg
	DVOLPATH=/dev/$VOLGR/$DVOLNAME
	LVOLPATH=/dev/$VOLGR/$LVOLNAME
	DSNAME=`echo ${DVOLNAME}_ss_${DATE} \| tr '[A-Z]' '[a-z]'`
	LSNAME=`echo ${LVOLNAME}_ss_${DATE} \| tr '[A-Z]' '[a-z]'`

	package main

	import (
	"encoding/json"
	"fmt"
	"net/http"
	"time"

	"github.com/goiot/devices/piglow"
	"golang.org/x/exp/io/i2c"