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@jarthod
jarthod / mongo-hang-monitoring.rb
Created Nov 8, 2019
Ruby script which tries to detect when mongo is up but super slow (for example due to IO issue) and stop it to allow fallback to secondary
View mongo-hang-monitoring.rb
#!/usr/bin/env ruby
# Tries to detect when mongo is up but super slow (ex: IO issue)
THRESHOLD = 20_000 # ms
def test_mongo tries: 5
out = `echo -e "db.isMaster()\ndb.getReplicationInfo()" | mongo mongodb://localhost/?socketTimeoutMS=#{THRESHOLD} 2>&1`
res = $?
if res != 0 && !out['Connection refused']
@jarthod
jarthod / process_semaphore.rb
Created Apr 17, 2019
Provides a system wide file lock to ensure no more than X process is running at the same time.
View process_semaphore.rb
#!/usr/bin/env ruby
# Provides a system wide file lock to ensure no more
# than X process is running at the same time.
# Example:
#
# process_semaphore!({
# prefix: "/tmp/my_process",
# limit: 2
@jarthod
jarthod / application_helper.rb
Last active Feb 14, 2016
Rails helper to render time using client's browser locale
View application_helper.rb
# Use this in place of `time_tag`
# Ex: <%= local_time_tag user.created_at %>
def local_time_tag time, opts = {}
opts[:data] = (opts[:data] || {}).merge format: 'local'
opts[:title] ||= time
time_tag(time, opts) + content_tag(:script, raw(<<-JAVASCRIPT))
var nodes = document.querySelectorAll('time[data-format=local]');
if (nodes.length > 0) {
var elem = nodes[nodes.length - 1];
@jarthod
jarthod / deploy.rb
Created Sep 20, 2015
Capistrano local assets compile
View deploy.rb
# Rewrite precompile tasks to do it locally
Rake::Task["deploy:compile_assets"].clear
task :compile_assets => [:set_rails_env] do
# invoke 'deploy:assets:precompile'
invoke 'deploy:assets:precompile_local'
invoke 'deploy:assets:backup_manifest'
end
namespace :assets do
task :precompile_local do
@jarthod
jarthod / git_cleanup.rb
Last active Aug 29, 2015
Ruby script to cleanup large files from your git repository
View git_cleanup.rb
#!/usr/bin/env ruby
# Ruby shows you the largest objects in your git repo's pack file & offers you to remove them automatically
# Based on http://stubbisms.wordpress.com/2009/07/10/git-script-to-show-largest-pack-objects-and-trim-your-waist-line/ by Antony Stubbs
# Use this to fetch all branches locally first:
# for branch in `git branch -a | grep remotes | grep -v HEAD | grep -v master`; do
# git branch --track ${branch##*/} $branch
# done