jedi4ever

Wordpress Setup

This challenge will see if you can setup and configure a wordpress correctly.

Wordpress is great!

Hardware

Ubuntu

The hardware used will be an Ubuntu machine.

• os: ubuntu

jedi4ever

Title:

How to make operations love Nodejs Apps

One little typo for Dev-kind, one big failure for Ops

(or vice versa if that makes more sense)

Abstract:

One little typo, is all what it takes to break a nodejs program. From an operational side, this doesn't give you much confidence.

Much of the documentation on nodejs out there is focused on building websites with Express and the Secret Sauce 'Socket.IO' and friends. Documentation on non-functional aspects, is sparse and more fragmented.

jedi4ever

Clustering: The basics

The trick? pass the file descriptor from a parent process and have the server.listen reuse that descriptor. So multiprocess in their own memory space (but with ENV shared usually)

It does not balance, it leaves it to the kernel.

In the last nodejs > 0.8 there is a cluster module (functional although marked experimental)

• http://nodejs.org/api/cluster.html
• Simple cluster example:

jedi4ever

Node Clients:

• sivy/node-statsd is feature complete and seems to be the most popular
• dscape/lynx has streams + (some wierd random/sampling stuff)
• msiebuhr/node-statsd-client has express helpers & multi child options
• fasterize/node-statsd-profiler has transformation function
• godmodelabs/statistik has a CLI interface

https://github.com/sivy/node-statsd/

jedi4ever

- Tune /etc/ssh/sshd_config

UseDNS no  # Disable DNS lookups
GSSAPIAuthentication no # Disable negotation of slow GSSAPI

don't forget to restart it, use a script provider to set it , or create it with veewee or snapshot it

- Tune Vagrantfile

    vb.customize ["modifyvm", :id, "--natdnshostresolver1", "on"]

jedi4ever

Get free version of growl - http://www.macupdate.com/app/mac/41038/growl-fork

From notes on - <https://github.com/visionmedia/node-growl>


$ sudo gem install terminal-notifier
$ npm install growl
$ ./node_modules/mocha/bin/mocha  --require test/common.js  -G

Simple guard-nodejs like :

jedi4ever

Compiling plain javascript (no external modules)

So we got nexe to compile nodejs projects to an executable binary:

• it downloads the nodejs source
• it creates a single file nodejs source (using sardines )
• it monkey patches the nodejs code to include this single file in the binary (adding it to the lib/nexe.js)

$ nexe -i myproject.js -o myproject.bin -r 0.10.3

Caveats:

• I had an issue with unicode chars that got converted: it uses uglify.js and this needs to be configured to leave them alone

jedi4ever

#!/bin/bash -e
export TERM=xterm
[[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm"
# Use the correct ruby
rvm install ruby-1.9.2-p320
rvm use 1.9.2@veewee-test-1 --create
# Do any setup
# e.g. possibly do 'rake db:migrate db:test:prepare' here
bundle install
export VEEWEE_SSH_TIMEOUT=600

jedi4ever

#!/bin/bash -e
export TERM=xterm
[[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm"
# Use the correct ruby
rvm install ruby-1.9.2-p320
rvm use 1.9.2@veewee-test-1 --create
# Do any setup
bundle install
export VEEWEE_SSH_TIMEOUT=600
export VEEWEE_CPU_COUNT=4

jedi4ever

if [ -f .veewee_params ]                                                             
then                                                                                 
  . .veewee_params                                                                   
fi                                                                                   
                                                                                     
if [ -z "$CHEF_INSTALLMETHOD" ]; then                                                
  export CHEF_INSTALLMETHOD="gems"                                                   
fi                                                                                   
                                                                                     
# Installing chef