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adamvduke / encrypt_openssl.txt
Created September 13, 2018 21:23 — forked from crazybyte/encrypt_openssl.txt
File encryption using OpenSSL
For symmetic encryption, you can use the following:
To encrypt:
openssl aes-256-cbc -salt -a -e -in plaintext.txt -out encrypted.txt
To decrypt:
openssl aes-256-cbc -salt -a -d -in encrypted.txt -out plaintext.txt
For Asymmetric encryption you must first generate your private key and extract the public key.
@adamvduke
adamvduke / .zshrc
Last active November 22, 2016 19:01 — forked from bmhatfield/.zshrc
OSX Keychain Environment Variables
# If you use bash, this technique isn't really zsh specific. Adapt as needed.
source ~/keychain-environment-variables.sh
# AWS configuration example, after doing:
# $ set-keychain-environment-variable AWS_ACCESS_KEY_ID
# provide: "AKIAYOURACCESSKEY"
# $ set-keychain-environment-variable AWS_SECRET_ACCESS_KEY
# provide: "j1/yoursupersecret/password"
export AWS_ACCESS_KEY_ID=$(keychain-environment-variable AWS_ACCESS_KEY_ID);
export AWS_SECRET_ACCESS_KEY=$(keychain-environment-variable AWS_SECRET_ACCESS_KEY);
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adamvduke / service-checklist.md
Last active May 8, 2017 05:11 — forked from acolyer/service-checklist.md
Internet Scale Services Checklist

Internet Scale Services Checklist

A checklist for designing and developing internet scale services, inspired by James Hamilton's 2007 paper "On Desgining and Deploying Internet-Scale Services."

Basic tenets

  • Does the design expect failures to happen regularly and handle them gracefully?
  • Have we kept things as simple as possible?
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adamvduke / keybase.md
Created April 14, 2016 15:22
keybase proof

Keybase proof

I hereby claim:

  • I am adamvduke on github.
  • I am adamvduke (https://keybase.io/adamvduke) on keybase.
  • I have a public key ASAdtHkKYGody9mlJ2r3_QeHa2uCosnLTuc9xRNrv8fdxwo

To claim this, I am signing this object:

@adamvduke
adamvduke / Caddyfile
Created February 26, 2016 16:05
Serve rails with TLS using caddyserver
example.com {
root /srv/example.com/public
tls admin@example.com
proxy / localhost:5000 {
except /assets
}
}
@adamvduke
adamvduke / postgres-replication-lag-functions.sql
Last active December 17, 2015 01:11
A query to get postgres streaming replication lag
BEGIN;
CREATE OR REPLACE FUNCTION primary_streaming_byte_lag() RETURNS TABLE (client_hostname text, client_addr inet, log_location_diff_bytes numeric, total_byte_lag double precision, total_byte_lag_pretty text, replay_byte_lag double precision, replay_byte_lag_pretty text)
LANGUAGE SQL SECURITY DEFINER
AS $$
SELECT
client_hostname,
client_addr,
log_location_diff_bytes,
( (cur_xlog * 255 * 16 ^ 6) + cur_offset) - ((replay_xlog * 255 * 16 ^ 6) + replay_offset) AS total_byte_lag,
pg_size_pretty((( (cur_xlog * 255 * 16 ^ 6) + cur_offset) - ((replay_xlog * 255 * 16 ^ 6) + replay_offset))::numeric) AS total_byte_lag_pretty,
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adamvduke / HTTP-1.1-400-Not-Found
Last active November 15, 2015 00:10
curl -i "https://scontent-a.cdninstagram.com/hphotos-xaf1/outbound-distilleryimage2/t0.0-17/OBPTH/1c8dbe10a8a4....e414f2eeda2_8.jpg"
HTTP/1.1 400 Not Found
Content-Type: text/plain
Server: proxygen
Timing-Allow-Origin: *
X-Cache-Ts: 1447545792
Date: Sun, 15 Nov 2015 00:03:12 GMT
X-FB-Edge-Debug: BBUHPNJ58swqQlRj0vjMAzLKyzlubMK_sF7iftGX9VpdYAnw9_02fPGxmEeelkNXf_DeSr0oNybV0ztpT-DAjg
Connection: keep-alive
Content-Length: 9
@adamvduke
adamvduke / gist:99d5ddc67365ea814d8e
Created June 6, 2015 16:06
$ dig app5.zeropush.com @ns1.dreamhost.com ANY
;; Truncated, retrying in TCP mode.
; <<>> DiG 9.8.3-P1 <<>> app5.zeropush.com @ns1.dreamhost.com ANY
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62516
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; WARNING: recursion requested but not available
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adamvduke / nginx.conf
Last active December 16, 2019 16:09
# nginx Configuration File
# http://wiki.nginx.org/Configuration
# Run as a less privileged user for security reasons.
user forge;
# How many worker threads to run;
# "auto" sets it to the number of CPU cores available in the system, and
# offers the best performance. Don't set it higher than the number of CPU
# cores if changing this parameter.
@adamvduke
adamvduke / 2013-01-07-profiling-memory-leaky-sidekiq-applications-with-ruby-2.1.md
Last active August 29, 2015 14:12 — forked from krasnoukhov/2013-01-07-profiling-memory-leaky-sidekiq-applications-with-ruby-2.1.md

My largest Sidekiq application had a memory leak and I was able to find and fix it in just few hours spent on analyzing Ruby's heap. In this post I'll show my profiling setup.

As you might know Ruby 2.1 introduced a few great changes to ObjectSpace, so now it's much easier to find a line of code that is allocating too many objects. Here is great post explaining how it's working.

I was too lazy to set up some seeding and run it locally, so I checked that test suite passes when profiling is enabled and pushed debugging to production. Production environment also suited me better since my jobs data can't be fully random generated.

So, in order to profile your worker, add this to your Sidekiq configuration:

if ENV["PROFILE"]