| #!/bin/bash | |
| # loads a pry console to interact with the chef server | |
| # (substitute irb if pry is not available) | |
| bundle exec knife exec -E "require 'pry'; binding.pry" | |
| # type `ls` to see available methods | |
| # to perform a node search for example: `nodes.search("roles:web*")` |
| #!/bin/bash | |
| host="$1" | |
| workspace="/tmp/memcached-keys/$1" | |
| rm -rf "$workspace" | |
| mkdir -p "$workspace/items" | |
| for item in $(echo "stats items" | nc "$host" 11211 | grep items | awk '{print $2}' | cut -d : -f 2 | sort -n | uniq); do | |
| echo "stats cachedump $item 1000000" | nc "$host" 11211 > "$workspace/items/$item" |
If you want to interact with the chef server using the chef gem, you can get an interactive console using knife exec. This can be useful when trying out ideas for automation.
For example, how do I get the IP for a single (random) node for a role (example requires that pry is available):
$> bundle exec knife exec -E "require 'pry'; binding.pry"
[1] pry(#<Object>)> search(:node, 'role:solr-search').shuffle.first.ipaddress
=> "10.45.10.189"
This outline is for a presentation I'm giving at CoderFaire 2014 called Cache Me If You Can on September 21, 2014.
The description that will be listed for the talk:
Using a Content Delivery Network (CDN) can be a great way to improve the performance of your website. In this talk, we will explore the key concepts of HTTP caching and how they are used by a CDN. We will review some of the common challenges and pitfalls in setting up an awesome CDN configuration. To tie it all together, we will walk through how to verify your CDN configuration with automated testing.
| class DotDot | |
| def self.dot(starting_text = "Loading", completed_text = "Done!") | |
| print starting_text | |
| thread = Thread.new { loop { print '.'; sleep 1 } } | |
| yield if block_given? | |
| Thread.kill(thread) | |
| print "\n" | |
| puts completed_text | |
| end | |
| end |
| #!/usr/bin/env ruby | |
| USAGE = <<-EOS | |
| Run shell commands from vim in another terminal window. | |
| Useful for triggering long-running tasks (tests, vagrant, test-kitchen, etc) without | |
| blocking your vim session. | |
| ## Usage |
| #!/bin/sh | |
| current_datetime=$(date | date +'%F-%H%M') | |
| ps aux | grep current | grep -v grep | awk '{print $2}' > /tmp/passengers.$current_datetime.txt | |
| passenger-status | grep PID | awk '{print $2}' >> /tmp/passengers.$current_datetime.txt | |
| likely_freeloaders=$(uniq -u /tmp/passengers.$current_datetime.txt) | |
| echo "Passenger doesn't know if these guys should be on the train" | |
| echo $likely_freeloaders | xargs ps -o pid,command --no-headers |
| class PingMonitor < Scout::Plugin | |
| OPTIONS =<<-EOS | |
| destination: | |
| default: yahoo.com | |
| name: Desitnation | |
| notes: The destination address for ping to check. | |
| EOS | |
| def build_report | |
| ping_output = `ping -c 1 #{option(:destination)}` |
| require 'chronic' | |
| class PassengerProcess | |
| attr_accessor :pid, :uptime | |
| def initialize(passenger_status_line) | |
| values = passenger_status_line.match(/PID:\s(\d*).*Uptime:\s*(.*)$/) | |
| @pid = values[1].to_i | |
| @uptime = values[2] | |
| end |
| {"tumblelog":{"title":"Rails Machine Status","description":"System and network updates and status information for Rails Machine.\r\n","name":"railsmachine","timezone":"US\/Eastern","cname":"status.railsmachine.com","feeds":[]},"posts-start":0,"posts-total":"97","posts-type":false,"posts":[{"id":390738426,"url":"http:\/\/status.railsmachine.com\/post\/390738426","url-with-slug":"http:\/\/status.railsmachine.com\/post\/390738426\/presidents-day-holiday-support","type":"regular","date-gmt":"2010-02-15 13:08:06 GMT","date":"Mon, 15 Feb 2010 08:08:06","bookmarklet":0,"mobile":0,"feed-item":"","from-feed-id":0,"unix-timestamp":1266239286,"format":"markdown","reblog-key":"mE83wtxd","slug":"presidents-day-holiday-support","regular-title":"Presidents Day Holiday Support","regular-body":"<p>Here at Rails Machine, we\u2019re pretty much a 24\/7\/365 shop. However, every now and then we like to untether ourselves from our laptops and spend time with our friends, family, and loved ones.<\/p>\n\n<p>Today, Monday February 1 |