mheffner

  module Spawner
    class SpawnedJob < EventMachine::Connection
      def initialize(params)
        @output = ""
        @dfr = params[:deferrable]
        super
      end

      def notify_readable
        begin

mheffner

# See this article for how to tag processes:
# http://support.silverline.librato.com/kb/monitoring-tags/using-monitoring-tags
#

####
# Apache config option:
# See: http://www.modrails.com/documentation/Users%20guide%20Apache.html#PassengerRuby
#

PassengerRuby /path/to/ruby_wrapper.sh

mheffner

# silverline - start the Librato Silverline agent
#
# The Librato Silverline agent collects monitoring statistics
# from Silverlined processes, dynamically rebalances capacity
# based on registered SLAs and process demand, and pushes limits
# to managed Silverlined processes.
#
# Librato Silverline is provided as a SaaS platform, see:
# http://www.librato.com
#

mheffner

Setting up syslog logging on Heroku with Sinatra 1.2.x

1. Update your Gemfile to include:

gem 'remote_syslog_logger'

2. Add the file remote_syslog.rb below to your Sinatra app as lib/remote_syslog.rb.

3. Modify your config.ru to match the example one below.

mheffner

$ grep -i digicert /etc/pki/tls/cert.pem
        Issuer: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Assured ID Root CA
        Subject: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Assured ID Root CA
        Issuer: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Global Root CA
        Subject: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Global Root CA
        Issuer: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert High Assurance EV Root CA
        Subject: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert High Assurance EV Root CA

mheffner

/*
 * Dumps the value of gettimeofday(), the TSC, and
 * getrusage(RUSAGE_SELF) every two seconds while performing some fake
 * I/O workload on a /tmp file.
 *
 * Build: gcc -o readtsc readtsc.c -lrt
 */

#include <stdio.h>

mheffner

#!/usr/bin/env ruby
#
#
# Cleanup EC2 EBS snapshots.
#
# Originally from: http://www.elastdream.com/2009/04/snapshots.html
#

require 'rubygems'
require 'right_aws'

mheffner

function traildir()
{
    local n=$1 dir=$2
    local sl tildedir homelen shifted  traildir
    local oldifs=$IFS

    tildedir=${dir#$HOME}
    if ! [[ "$tildedir" == "$dir" ]]; then
            # Special break out case
            [[ -z "$tildedir" ]] && { echo "~"; return 0; }

mheffner

$ make libab.so
gcc -Wall -fPIC -fvisibility=hidden   -c -o filea.o filea.c
gcc -Wall -fPIC -fvisibility=hidden   -c -o fileb.o fileb.c
gcc -Wall -fPIC -fvisibility=hidden -shared -o libab.so filea.o fileb.o

$ strip --strip-all --discard-all libab.so 

$ objdump -T libab.so   | grep get
0000000000000587 g    DF .text 000000000000004a  Base        ab_get_string

mheffner

/* filea.c */
#include <stdio.h>

/* Include public API definitions. */
#include "ab.h"

/* Function provided by fileb.c */
int b_getval_super_secret(void);

/* Simple function internal to this file only. */