nickmarden

# How to correctly install http://rubygems.org/gems/debugger
# for use with chef-client

# If you are using the self-contained Ruby installation of Chef
# that is installed in /opt/chef, make sure that the 'gem' command
# that you invoke is the one that modifies the self-contained
# Ruby installation belonging to chef, rather than the system Ruby
# in /usr/bin.
#
# If the Ruby used by your chef-client is the system Ruby, this line

nickmarden

[root@my-server]$ rdebug `which chef-client`
(rdb:1) break /var/chef/cache/cookbooks/gsfn_mysql/recipes/custom.rb:168
Breakpoint 1 file /var/chef/cache/cookbooks/gsfn_mysql/recipes/custom.rb, line 168
(rdb:1) continue

nickmarden

[2012-11-19T18:16:09+00:00] INFO: *** Chef 10.14.4 ***
[2012-11-19T18:16:16+00:00] INFO: Run List is [recipe[xfs], role[gsfn_auth_prod], role[volumes]...
...
Breakpoint 1 at /var/chef/cache/cookbooks/gsfn_mysql/recipes/custom.rb:168
/var/chef/cache/cookbooks/gsfn_mysql/recipes/custom.rb:168
route53_rr "sql-#{node['gsfn']['mysql']['serverid']}" do
(rdb:1) list
[163, 172] in /var/chef/cache/cookbooks/gsfn_mysql/recipes/custom.rb
   163  execute "lower swappiness threshold" do
   164    command "echo 0 > /proc/sys/vm/swappiness"

nickmarden

Keybase proof

I hereby claim:

• I am nickmarden on github.
• I am nick_marden (https://keybase.io/nick_marden) on keybase.
• I have a public key whose fingerprint is 3663 55B8 098A 711C 350F 8549 8D82 F04B C7A0 B5D1

To claim this, I am signing this object:

nickmarden

nginx:
  pkg:
    - installed

nginx-config:
  file:
    - managed
    - name: /etc/nginx/nginx.conf
    - source: salt://conf/nginx/nginx.conf
    - user: nginx

nickmarden

include:
  - nginx

# ...

jenkins-http-proxy:
  file:
    - managed
    - template: jinja
    - name: /etc/nginx/conf.d/nginx-proxy-jenkins.conf

nickmarden

nginx:
  pkg:
    - installed

nginx-config:
  file:
    - managed
    - name: /etc/nginx/nginx.conf
    - source: salt://conf/nginx/nginx.conf
    - user: nginx

nickmarden

# Copyright (c) 2013, StrongLoop, Inc. <callback@strongloop.com>
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

nickmarden

1. Voting

---

Each voter can vote in zero or more referenda. Each referendum has one or more questions, and each question is a yes/no vote. Write the simplest normalized schema to describe this in generic SQL statements or as an entity-relationship diagram. Point out where the indexes would be if you want to quickly know the results of a given referendum question, but you never expect to query a single voter's voting record.

2. Availability on AWS

---

Your client plans to host their web application on AWS. When would you advise (a) deployment in a single availability zone, (b) deployment in multiple availability zones in a single region (c) deployment in multiple regions? What operational difficulty or complexity, if any, is added as you go from (a) to (b) to (c)?

nickmarden

#!/bin/bash -x
rm -fr $HOME/elasticsearch
mkdir -p $HOME/elasticsearch
mkdir -p $HOME/elasticsearch/data
mkdir -p $HOME/elasticsearch/logs
cp -p config/travis/elasticsearch-client.yml config/elasticsearch.yml
cat config/elasticsearch.yml
sed "s#__HOME__#$HOME#g;" config/travis/elasticsearch-server.yml > $HOME/elasticsearch/elasticsearch.yml
cat $HOME/elasticsearch/elasticsearch.yml
sed "s#__HOME__#$HOME#g;" config/travis/elasticsearch.sh > $HOME/elasticsearch/elasticsearch.sh