maurorappa

require 'rubygems'
require 'redis'
require 'uri'

uri = URI.parse('redis://127.0.0.1:26379')
REDIS = Redis.new(:host => uri.host, :port => uri.port)

REDIS.psubscribe('*switch-master' ) do |on|
 on.psubscribe do |event, total|
    puts "Subscribed to ##{event} (#{total} subscriptions)"

maurorappa

/* ------------------------------------------------------------ *
 * file:        sslconnect.c                                    *
 * ------------------------------------------------------------ *
 * file:        sslconnect.c                                    *
 * purpose:     utility to time an SSL connection and           *
 * to compile:                                                  *
 * gcc -lssl -lcrypto -o sslconnect sslconnect.c                *
 * ------------------------------------------------------------ */

#include <sys/socket.h>

maurorappa

You can't simply run a backup on a specific node in a cluster, since its role can change to master and lead to an overload for it.
You need some intelligence to choose the right node (slave) and allow multiple nodes to execute the backup; you want to be safe without
designing a specific node to run it.

This is my approach:
* schedule the script below in any MongoDB host
* the script will exit if it's running on a master
* if it's a slave, it will wait a random interval, check if there's a lock document on the master and if not present perform the backup.

in such a way you are covered from any single node failure

maurorappa

#!/bin/bash -xe

##################################################################################
function usage(){
  echo "usage: $(basename $0) /path/to/jenkins_home archive.tar.gz"
}
##################################################################################

readonly JENKINS_HOME=$1
readonly DEST_FILE=$2

maurorappa

import boto
import sys,os.path
from boto.s3.key import Key

file_name=sys.argv[1]
if not os.path.isfile(file_name):
        print file_name + " not found!"
        sys.exit()

aws_access_key=''

maurorappa

#!/usr/bin/python 
# Acts like rpm -qa and lists the names of all the installed packages.
# Usage:
# python rpmqa.py
# This toool was used to debug RedHat Bugzilla BZ#1253608 for RHEL6 (not public)
# the relative errata is: https://rhn.redhat.com/errata/RHBA-2015-1809.html
  

import rpm
import datetime

maurorappa

I had a problem which required a closed monitoring of AMQ resources.
All Enterprise Java program can be monitored by JMX and the standard interface to visualize instrumentation data is JConsole.

Jconsole is great for realtime monitoring, but our load tests were running for hours and we needed all raw data to be parsed offline, a Jconsole graph is an approximation for our purposes.

I wanted a Cli tool to save on file all raw numbers; first I needed a java utility to query java processes via JMX protocol.

I choose jmxterm ( http://wiki.cyclopsgroup.org/jmxterm/ ) which is simple and scriptable.