| CLEANUP_THRESHOLD = 250 * 1_024_000 # 250 megabytes | |
| # See https://robots.thoughtbot.com/how-to-reduce-a-large-heroku-compiled-slug-size | |
| desc "Clean up the Heroku repo to reduce compiled slug size" | |
| task cleanup: :set_app do | |
| force = ENV.fetch('FORCE_CLEANUP', false) | |
| if force || slug_size > CLEANUP_THRESHOLD | |
| puts "Heroku compiled slug size exceeds 250 MB. Cleaning up the Heroku repo." | |
| install_heroku_plugin('heroku-repo') | |
| _execute heroku_command("repo:gc") |
"Bob" (backend engineer) was the developer on call during this incident. All names have been changed to protect the innocent. :)
Bad code which prevented server startup was deployed to production. It had not been manually tested in a dev environment, but had passed all unit and
Written by David. Much thanks to Lukasz for technical and moral support, and helping me grep the Papertrail logs.
All times are in EST.
Heroku PGBackups was running during a database migration, and was unexpectedly holding a lock. Postgres stopped serving any queries until the backup was canceled.
| namespace :sync do | |
| desc "Run production sync" | |
| task run: [ | |
| :set_app, | |
| :maint_on, | |
| :scale_down, | |
| :cancel_backup, | |
| :delete_database, | |
| :create_production_fork, | |
| :migrate, |
| $ logstash -f samples/tcp.conf | |
| Settings: Default pipeline workers: 8 | |
| Pipeline main started | |
| {"message":"\"2017-04-28T22:44:30.424-07:00\"","@timestamp":"2017-04-29T05:44:30.424Z","@version":"1","severity":"INFO","host":"Davids-MacBook-Pro-6.local","port":62671} | |
| {"message":"\"2017-04-28T22:44:30.528-07:00\"","@timestamp":"2017-04-29T05:44:30.528Z","@version":"1","severity":"INFO","host":"Davids-MacBook-Pro-6.local","port":62671} | |
| {"message":"\"2017-04-28T22:44:30.633-07:00\"","@timestamp":"2017-04-29T05:44:30.633Z","@version":"1","severity":"INFO","host":"Davids-MacBook-Pro-6.local","port":62671} | |
| {"message":"\"2017-04-28T22:44:30.737-07:00\"","@timestamp":"2017-04-29T05:44:30.737Z","@version":"1","severity":"INFO","host":"Davids-MacBook-Pro-6.local","port":62671} | |
| {"message":"\"2017-04-28T22:44:30.842-07:00\"","@timestamp":"2017-04-29T05:44:30.842Z","@version":"1","severity":"INFO","host":"Davids-MacBook-Pro-6.local","port":62671} | |
| {"message":"\"2017-04-28T22:44:30.947-07:00\"","@timestamp":"2017-04-29T05:44:30.9 |
| class Config | |
| CONSTANT = 1 | |
| def CONSTANT=(val) | |
| fail | |
| end | |
| end | |
| config = Config.new | |
| config.CONSTANT = 2 |
| class Config | |
| attr_accessor :thing | |
| def thing=(val) | |
| raise ArgumentError if defined?(@thing) | |
| @thing = val | |
| end | |
| end | |
| config = Config.new |
| require 'appcanary' | |
| Appcanary.configure do |config| | |
| config.api_key = ENV['APPCANARY_API_KEY'] | |
| end | |
| # Explicitly specify language and file | |
| Appcanary.check(language: :ruby, file: 'Gemfile.lock') | |
| # Autodetect Ruby as the language and Gemfile.lock as the file |
| # Tested with ActiveRecord 4.0.5 | |
| # Run using: | |
| # BUNDLE_GEMFILE=gemfiles/rails_4.0.gemfile bundle console | |
| require 'sqlite3' | |
| require 'active_record' | |
| require 'groupify/adapter/active_record' | |
| ActiveSupport::VERSION::STRING | |
| # => "4.0.5" |
| require 'time' | |
| require 'benchmark' | |
| time = Time.now.iso8601(3) | |
| # => "2014-05-26T23:26:08.628-07:00" | |
| Benchmark.bm do |x| | |
| x.report('parse') { 100_000.times { Time.parse(time).gmtime } } | |
| x.report('iso8601') { 100_000.times { Time.iso8601(time).gmtime } } | |
| end |