Juan Antonio Plaza jplaza

Extend and override nginx config for Elastic Beanstalk Amazon Linux 2

Documentation on how to override or extend the default nginx config on Elastic Beanstalk running om Amazon Linux 2. Correct as of 2021-08-01. Also see the general documentation on how to extend linux servers.

All references to placing files refer to putting a file at this location in your application bundle. You should never modify a file directly at your Elastic Beanstalk server by ssh:ing to the server, since such a change will be wiped whenever your servers autoscale or if you rebuild your application completely.

Adding a new location block

The easiest extension is to add a new location block to the main server block. This can be done by placing a .conf file with a server block in the folder .platform/nginx/conf.d/elasticbeanstalk. Any such file is automatically included in the main server block.

Overriding the default location

CLJS in AWS Lambda Quick Start

Setup

First, a few dependencies:

Leiningen: https://leiningen.org/
Node.js & NPM: https://nodejs.org/
Serverless: https://serverless.com/
An active AWS account: https://aws.amazon.com/

Atom Clojure Setup

This describes how I setup Atom for an ideal Clojure development workflow. This fixes indentation on newlines, handles parentheses, etc. The keybinding settings for enter (in keymap.cson) are important to get proper newlines with indentation at the right level. There are other helpers in init.coffee and keymap.cson that are useful for cutting, copying, pasting, deleting, and indenting Lisp expressions.

Install Atom

Download Atom

The Atom documentation is excellent. It's highly worth reading the flight manual.

	;; Unfortunately, re-natal's stacktraces are not always great.
	;;
	;; The following two functions (downgrade-reagent-errors and set-error-handler)
	;; give you better error messages in the Debug console (accessible in XCode
	;; or using `react-native log-ios`).
	;;
	;; This should apply mutatis mutandis to Android.

	(defonce !handler-set (atom false))

	#!/usr/bin/env bash

	# Prevent cron tasks from being ran by multiple instances in Elastic Beanstalk.
	# Automatically adjusts to new "leading instance" when scaling up or down.
	# Stores the result in an environment variable for other uses as AWS_EB_CRON
	#
	# This must be ran by cron as the root user to function correctly.
	# Anything after this file will be executed as webapp for security.
	#
	# Example Cron (should be created by .ebextensions):

	{
	"Version": "2012-10-17",
	"Id": "arn:aws:sqs:YOUR-AWS-REGION:YOUR-AWS-ACCOUNT-ID:YOUR-QUEUE-NAME/SQSDefaultPolicy",
	"Statement": [
	{
	"Sid": "example-statement-ID",
	"Effect": "Allow",
	"Principal": {
	"AWS": "*"
	},

	var Nightmare = require('nightmare');
	var vo = require('vo');

	vo(run)(function(err, result) {
	if (err) throw err;
	});

	fu

	;; Auto-scrolling ==============================================================

	(defn scroll! [el start end time]
	(.play (goog.fx.dom.Scroll. el (clj->js start) (clj->js end) time)))

	(defn scrolled-to-end? [el tolerance]
	;; at-end?: element.scrollHeight - element.scrollTop === element.clientHeight
	(> tolerance (- (.-scrollHeight el) (.-scrollTop el) (.-clientHeight el))))

	(defn autoscroll-list [{:keys [children class scroll?] :as opts}]

	(ns srs-s.routes.core
	(:require [io.pedestal.http :as pedestal]
	[io.pedestal.http.route.definition :refer [defroutes]]
	[io.pedestal.interceptor.helpers :as interceptor]
	[io.pedestal.http.body-params :as body-params]
	[ring.util.response :as ring-response]
	[cognitect.transit :as transit]
	[om.next.server :as om]
	[om.tempid :as tempid])
	(:import [java.io OutputStream]

	(require '[schema.core :as s])
	(require '[schema.utils :as su])

	(defn check-map [schema value]
	{:pre [(map? value)]}
	(if-let [value (s/check schema value)]
	(into {}
	(for [[k v] value]
	[k (cond
	(symbol? v) (keyword v)