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• What do Etcd, Consul, and Zookeeper do?
  • Service Registration:
    • Host, port number, and sometimes authentication credentials, protocols, versions numbers, and/or environment details.
  • Service Discovery:
    • Ability for client application to query the central registry to learn of service location.
  • Consistent and durable general-purpose K/V store across distributed system.
    • Some solutions support this better than others.
    • Based on Paxos or some derivative (i.e. Raft) algorithm to quickly converge to a consistent state.
• Centralized locking can be based on this K/V store.

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#!/bin/bash
#
# MYSQL CONFIG
# ============
# <UDF name="db_password" Label="Choose a MySQL Root Password" />
# <UDF name="db_name" Label="MySQL - Database Name" default="" example="Optionally create this database." />
# <UDF name="db_user" Label="MySQL - Username" default="" example="Optionally create this user." />
# <UDF name="db_user_password" Label="MySQL - Password" default="" example="The user password." />
#
# OPTIONAL LIBRARIES TO INSTALL

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#!/usr/bin/env python
# -*- coding: utf-8 -*-

# Copyright (c) 2014 Alexey Kutepov a.k.a. rexim

# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation files
# (the "Software"), to deal in the Software without restriction,
# including without limitation the rights to use, copy, modify, merge,
# publish, distribute, sublicense, and/or sell copies of the Software,

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#!/usr/bin/bash

if [ -z "$1" ]
then
  echo "Usage: `basename $0` filename-to-convert"
  exit 1
fi

# Lines in a DOS text file end in a CR-LF.
CR='\015'  # Carriage return.

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<?xml version="1.0" encoding="UTF-8"?>
<zabbix_export>
    <version>2.0</version>
    <date>2015-01-21T15:24:57Z</date>
    <groups>
        <group>
            <name>Templates</name>
        </group>
    </groups>
    <templates>

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A Brief Introduction to Fabric

Fabric is a deployment management framework written in Python which makes remotely managing multiple servers incredibly easy. If you've ever had to issue a change to a group servers, this should look pretty familiar:

for s in $(cat servers.txt); do ssh $s service httpd graceful; done

Fabric improves on this process by providing a suite of functions to run commands on the servers, as well as a number of other features which just aren't possible in a simple for loop. While a working knowledge of Python is helpful when using Fabric, it certainly isn't necessary. This tutorial will cover the steps necessary to get started with the framework and introduce how it can be used to improve on administering groups of servers.

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    #!/bin/bash
    # Shell script to monitor running services such as web/http, ssh, mail etc.
    # If service fails it will send an Email to ADMIN user
    # -------------------------------------------------------------------------
    # Copyright (c) 2006 nixCraft project <http://www.cyberciti.biz/fb/>
    # This script is licensed under GNU GPL version 2.0 or above
    # -------------------------------------------------------------------------
    # This script is part of nixCraft shell script collection (NSSC)
    # Visit http://bash.cyberciti.biz/ for more information.
    # ----------------------------------------------------------------------

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cd ~
sudo yum update
sudo yum install java-1.7.0-openjdk.i686 -y

wget https://github.com/downloads/elasticsearch/elasticsearch/elasticsearch-0.19.9.tar.gz -O elasticsearch.tar.gz

tar -xf elasticsearch.tar.gz
rm elasticsearch.tar.gz
mv elasticsearch-* elasticsearch
sudo mv elasticsearch /usr/local/share

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###############################################################################
## Monit control file
###############################################################################
##
## Comments begin with a '#' and extend through the end of the line. Keywords
## are case insensitive. All path's MUST BE FULLY QUALIFIED, starting with '/'.
##
## Below you will find examples of some frequently used statements. For 
## information about the control file, a complete list of statements and 
## options please have a look in the monit manual.

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# /etc/rsyslog.conf Configuration file for rsyslog.
#
# For more information see
# /usr/share/doc/rsyslog-doc/html/rsyslog_conf.html
#
# Default logging rules can be found in /etc/rsyslog.d/50-default.conf


#################
#### MODULES ####