crmaxx

How to install promtool by Prometheus?

# Fetch latest version
TAG=$(curl -s https://api.github.com/repos/prometheus/prometheus/releases | jq -r '.[] | .tag_name' | head -n 1)
echo $TAG

# Remove the `v` prefix
VERSION=$(echo $TAG | sed 's/v//')
echo $VERSION

crmaxx

#! /bin/sh
# @author: Jarle Friestad
# Based on script by Claus Witt (http://clauswitt.com/319.html)
 
# Adding or Removing Items to hosts file
# Use -h flag for help
 
DEFAULT_IP=127.0.0.1
IP=${3:-$DEFAULT_IP}
 

crmaxx

namespace :deploy do
  namespace :assets do
    Rake::Task['deploy:assets:precompile'].clear_actions

    desc "Precompile assets on local machine and upload them to the server."
    task :precompile do
      run_locally do
        execute 'RAILS_ENV=production bundle exec rake assets:precompile'
      end

crmaxx

# this monit config goes in /etc/monit/conf.d

check process puma_master
  with pidfile  /data/myapp/current/tmp/puma.pid
  start program = "/etc/monit/scripts/puma start"
  stop program = "/etc/monit/scripts/puma stop" 
  group myapp

check process puma_worker_0
  with pidfile /data/myapp/current/tmp/puma_worker_0.pid

crmaxx

Finding a Ruby memory leak using a time analysis

When developing a program in Ruby, you may sometimes encounter a memory leak. For a while now, Ruby has a facility to gather information about what objects are laying around: ObjectSpace.

There are several approaches one can take to debug a leak. This discusses a time-based approach, where a full memory dump is generated every, say, 5 minutes, during a time that the memory leak is showing up. Afterwards, one can look at all the objects, and find out which ones are staying around, causing the

crmaxx

require "bigdecimal"

# List of our individual pricing rules
TAX           = ->(val) { val + val*0.05 }
FEE           = ->(val) { val + 1 }
PREMIUM       = ->(val) { val + 10 }
DISCOUNT      = ->(val) { val * 0.90 }
ROUND_TO_CENT = ->(val) { val.round(2) }
# One presenter
PRESENT       = ->(val) { val.to_f }

crmaxx

Installing Postgres via Brew

Pre-Reqs

Brew Package Manager

In your command-line run the following commands:

1. brew doctor
2. brew update

crmaxx

-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query 
FROM pg_stat_activity 
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' 

crmaxx

# p4merge for 64 bit
wget https://cdist2.perforce.com/perforce/r18.2/bin.linux26x86_64/p4v.tgz

tar zxvf p4v.tgz
sudo cp -r p4v-* /usr/local/p4v/
sudo ln -s /usr/local/p4v/bin/p4merge /usr/local/bin/p4merge

crmaxx

require 'minitest/mock'
require 'minitest/unit'
require 'date'

MiniTest::Unit.autorun

class TestMailPurge < MiniTest::Unit::TestCase
  class MailPurge
    def initialize(imap)
      @imap = imap