Infraestrutura Ágil

Soluções e métodos inteligentes para sua infra

Utilizando módulo Puppetlabs Apache

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1. Módulos da Puppetlabs

Como informei no post anterior, resolvi iniciar uma série de posts para divulgar os excelentes módulos da Puppetlabs, muita gente não os usa e não os conhece. Estes módulos são maduros e bem testados, afinal são construídos de forma coletiva pela comunidade puppet.

Não vale a pena investir tempo reinventando a roda, use estes módulos!

2. Método aplicado

A ideia aqui não é mostrar como se instala e configura o PuppetMaster, isso já foi bem coberto neste blog e nas wikis do meu site, partirei da ideia de que você já tem um ambiente rodando e em produção. Eu simplesmente vou mostrar alguns exemplos de uso do módulo para facilitar a configuração.

3. Entendendo os módulos

Todos os módulos da Puppetlabs tem um arquivo README, este arquivo contém informações mais do que suficientes para entender seu funcionamento e fazer uso dele.

Você vai encontrar os módulos da puppetlabs no Forge e no Github.

No caso do Github existem outros projetos no repositório além dos módulos, normalmente os módulos terão o nome de puppetlabs-module, mas na descrição estará bem claro.

4. Sobre o módulo Puppetlabs Apache

Este módulo é bastante interessante, particularmente eu o uso para gerenciar meus servidores apache, com ele consigo instalar o Apache, habilitar módulos, criar vhost, configurar vhosts e muito mais.

4.1 Classes

4.1.1 Public Classes

  • apache: Guides the basic setup of Apache.
  • apache::dev: Installs Apache development libraries. (Note: On FreeBSD, you must declare apache::package or apache before apache::dev.)
  • apache::mod::[name]: Enables specific Apache HTTPD modules.

4.1.2 Private Classes

  • apache::confd::no_accf: Creates the no-accf.conf configuration file in conf.d, required by FreeBSD’s Apache 2.4.
  • apache::default_confd_files: Includes conf.d files for FreeBSD.
  • apache::default_mods: Installs the Apache modules required to run the default configuration.
  • apache::package: Installs and configures basic Apache packages.
  • apache::params: Manages Apache parameters.
  • apache::service: Manages the Apache daemon.

4.2 Defined Types

4.2.1 Public Defined Types

  • apache::balancer: Creates an Apache balancer cluster.
  • apache::balancermember: Defines members of mod_proxy_balancer.
  • apache::listen: Based on the title, controls which ports Apache binds to for listening. Adds Listen directives to ports.conf in the Apache HTTPD configuration directory. Titles take the form ”, ‘:’, or ‘:’.
  • apache::mod: Used to enable arbitrary Apache HTTPD modules for which there is no specific apache::mod::[name] class.
  • apache::namevirtualhost: Enables name-based hosting of a virtual host. Adds all NameVirtualHost directives to the ports.conf file in the Apache HTTPD configuration directory. Titles take the form ’’, ’:’, ’default:, ”, or ‘:’.
  • apache::vhost: Allows specialized configurations for virtual hosts that have requirements outside the defaults.

4.2.2 Private Defined Types

  • apache::peruser::multiplexer: Enables the Peruser module for FreeBSD only.
  • apache::peruser::processor: Enables the Peruser module for FreeBSD only.

4.3 Templates

The Apache module relies heavily on templates to enable the vhost and apache::mod defined types. These templates are built based on Facter facts around your operating system. Unless explicitly called out, most templates are not meant for configuration.

5. Instalando o módulo Apache

No servidor puppetmaster acesse o diretório de módulos

cd /etc/puppet/modules

Vamos instalar o módulo apache

puppet module install puppetlabs-apache

Acompanhe a saída

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Notice: Preparing to install into /etc/puppet/modules ...
Notice: Downloading from https://forge.puppetlabs.com ...
Notice: Installing -- do not interrupt ...
/etc/puppet/modules
└─┬ puppetlabs-apache (v1.0.1)
  └── puppetlabs-concat (v1.0.2)

Veja que ele instalou o módulo concat que é dependência para este módulo.

5. Utilizando o módulo

Edite o arquivo /etc/puppet/manifests/site.pp e insira o código abaixo no node que receberá as configurações para instalação do Apache HTTPd.

5.1 Para instalar o Apache HTTPD Server

É importante você saber que configurações do apache que não são gerenciadas pelo Puppet serão removidas, esse módulo leva em conta que seu apache só será gerido pelo Puppet, logo tome cuidado ao usar em produção, pense em migrar o ambiente, será mais seguro. Eu criei uma nova VM, avaliei a VM antiga, escrevi toda a configuração, copiei os arquivos de aplicação e rodei o puppet, isso me permitiu desativar a VM antiga com segurança.

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node "apache.hacklab" {
        include apache
        include apache::mod::php
        include apache::mod::alias
        include apache::mod::rewrite
        include apache::mod::ssl
        include apache::mod::vhost_alias
}

Eu coloquei neste exemplo as configurações que normalmente utilizo em meus ambientes, agora vamos aplicar.

puppet agent -t

Acompanhe a saída

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Info: Retrieving plugin
Info: Loading facts in /etc/puppet/modules/concat/lib/facter/concat_basedir.rb
Info: Loading facts in /etc/puppet/modules/stdlib/lib/facter/puppet_vardir.rb
Info: Loading facts in /etc/puppet/modules/stdlib/lib/facter/root_home.rb
Info: Loading facts in /etc/puppet/modules/stdlib/lib/facter/pe_version.rb
Info: Loading facts in /etc/puppet/modules/stdlib/lib/facter/facter_dot_d.rb
Info: Loading facts in /var/lib/puppet/lib/facter/puppet_vardir.rb
Info: Loading facts in /var/lib/puppet/lib/facter/root_home.rb
Info: Loading facts in /var/lib/puppet/lib/facter/pe_version.rb
Info: Loading facts in /var/lib/puppet/lib/facter/concat_basedir.rb
Info: Loading facts in /var/lib/puppet/lib/facter/facter_dot_d.rb
Info: Caching catalog for puppet.hacklab
Info: Applying configuration version '1395824850'
Notice: /Stage[main]/Apache/Package[httpd]/ensure: created
Info: /Stage[main]/Apache/Package[httpd]: Scheduling refresh of Class[Apache::Service]
Notice: /Stage[main]/Apache::Mod::Ssl/File[ssl.conf]/ensure: defined content as '{md5}a3d9c9dac9163536b63c2801bdd43ea8'
Info: /Stage[main]/Apache::Mod::Ssl/File[ssl.conf]: Scheduling refresh of Service[httpd]
Notice: /Stage[main]/Apache/File[/etc/httpd/conf/httpd.conf]/content:
...
...
...
...
Info: FileBucket got a duplicate file {md5}27a5c8d9e75351b08b8ca1171e8a0bbd
Info: /Stage[main]/Apache/File[/etc/httpd/conf/httpd.conf]: Filebucketed /etc/httpd/conf/httpd.conf to puppet with sum 27a5c8d9e75351b08b8ca1171e8a0bbd
Notice: /Stage[main]/Apache/File[/etc/httpd/conf/httpd.conf]/content: content changed '{md5}27a5c8d9e75351b08b8ca1171e8a0bbd' to '{md5}227489018cada97a86d93b5ffafd6d4b'
Info: /Stage[main]/Apache/File[/etc/httpd/conf/httpd.conf]: Scheduling refresh of Class[Apache::Service]
Notice: /Stage[main]/Apache::Mod::Php/Apache::Mod[php5]/Package[php]/ensure: created
Notice: /Stage[main]/Apache::Mod::Ssl/Apache::Mod[ssl]/Package[mod_ssl]/ensure: created
Info: /Stage[main]/Apache/Concat[/etc/httpd/conf/ports.conf]/File[/var/lib/puppet/concat/_etc_httpd_conf_ports.conf/fragments/10_Listen 443]: Filebucketed /var/lib/puppet/concat/_etc_httpd_conf_ports.conf/fragments/10_Listen 443 to puppet with sum 462e40c14c182d965ae6448e832ebb9a
Notice: /Stage[main]/Apache/Concat[/etc/httpd/conf/ports.conf]/File[/var/lib/puppet/concat/_etc_httpd_conf_ports.conf/fragments/10_Listen 443]/ensure: removed
Info: /Stage[main]/Apache/Concat[/etc/httpd/conf/ports.conf]/File[/var/lib/puppet/concat/_etc_httpd_conf_ports.conf/fragments/10_NameVirtualHost *:443]: Filebucketed /var/lib/puppet/concat/_etc_httpd_conf_ports.conf/fragments/10_NameVirtualHost *:443 to puppet with sum 235a73c5a3abcbafdd73c00f8c639b89
Notice: /Stage[main]/Apache/Concat[/etc/httpd/conf/ports.conf]/File[/var/lib/puppet/concat/_etc_httpd_conf_ports.conf/fragments/10_NameVirtualHost *:443]/ensure: removed
Info: /var/lib/puppet/concat/_etc_httpd_conf_ports.conf/fragments: Scheduling refresh of Exec[concat_/etc/httpd/conf/ports.conf]
Notice: /Stage[main]/Apache/Concat[/etc/httpd/conf/ports.conf]/Exec[concat_/etc/httpd/conf/ports.conf]/returns: executed successfully
Notice: /Stage[main]/Apache/Concat[/etc/httpd/conf/ports.conf]/Exec[concat_/etc/httpd/conf/ports.conf]: Triggered 'refresh' from 1 events
Notice: /Stage[main]/Apache/Concat[/etc/httpd/conf/ports.conf]/File[/etc/httpd/conf/ports.conf]/content:
--- /etc/httpd/conf/ports.conf    2014-03-26 05:46:43.562816901 -0300
+++ /tmp/puppet-file20140326-3322-1da7azk-0   2014-03-26 06:08:06.286816834 -0300
@@ -3,7 +3,5 @@
 # Managed by Puppet
 # ************************************

-Listen 443
 Listen 80
-NameVirtualHost *:443
 NameVirtualHost *:80

Info: /Stage[main]/Apache/Concat[/etc/httpd/conf/ports.conf]/File[/etc/httpd/conf/ports.conf]: Filebucketed /etc/httpd/conf/ports.conf to puppet with sum bc388698a3c11221869ded2030460038
Notice: /Stage[main]/Apache/Concat[/etc/httpd/conf/ports.conf]/File[/etc/httpd/conf/ports.conf]/content: content changed '{md5}bc388698a3c11221869ded2030460038' to '{md5}ac3b658e433eba85f350d4068b0ef826'
Info: Concat[/etc/httpd/conf/ports.conf]: Scheduling refresh of Class[Apache::Service]
Info: /Stage[main]/Apache/File[/etc/httpd/conf.d/25-intranet.seusite.com.br.conf]: Filebucketed /etc/httpd/conf.d/25-intranet.seusite.com.br.conf to puppet with sum d03969fa47021eceeadeea38ef4805fb
Notice: /Stage[main]/Apache/File[/etc/httpd/conf.d/25-intranet.seusite.com.br.conf]/ensure: removed
Info: /Stage[main]/Apache/File[/etc/httpd/conf.d/25-www.seusite.com.br.conf]: Filebucketed /etc/httpd/conf.d/25-www.seusite.com.br.conf to puppet with sum 230bc8bf6cd2bab7019c1c9cfa62df11
Notice: /Stage[main]/Apache/File[/etc/httpd/conf.d/25-www.seusite.com.br.conf]/ensure: removed
Info: /Stage[main]/Apache/File[/etc/httpd/conf.d/25-blog.seusite.com.br.conf]: Filebucketed /etc/httpd/conf.d/25-blog.seusite.com.br.conf to puppet with sum 0d1676f1185addac23548ca2c36a8759
Notice: /Stage[main]/Apache/File[/etc/httpd/conf.d/25-blog.seusite.com.br.conf]/ensure: removed
Info: FileBucket got a duplicate file {md5}a3d9c9dac9163536b63c2801bdd43ea8
Info: /Stage[main]/Apache/File[/etc/httpd/conf.d/ssl.conf.rpmsave]: Filebucketed /etc/httpd/conf.d/ssl.conf.rpmsave to puppet with sum a3d9c9dac9163536b63c2801bdd43ea8
Notice: /Stage[main]/Apache/File[/etc/httpd/conf.d/ssl.conf.rpmsave]/ensure: removed
Info: FileBucket got a duplicate file {md5}98540d3009ecc6435d8770c24a71258a
Info: /Stage[main]/Apache/File[/etc/httpd/conf.d/welcome.conf]: Filebucketed /etc/httpd/conf.d/welcome.conf to puppet with sum 98540d3009ecc6435d8770c24a71258a
Notice: /Stage[main]/Apache/File[/etc/httpd/conf.d/welcome.conf]/ensure: removed
Info: FileBucket got a duplicate file {md5}50015ff8bb23090aae4f8556987c5e40
Info: /Stage[main]/Apache/File[/etc/httpd/conf.d/php.conf]: Filebucketed /etc/httpd/conf.d/php.conf to puppet with sum 50015ff8bb23090aae4f8556987c5e40
Notice: /Stage[main]/Apache/File[/etc/httpd/conf.d/php.conf]/ensure: removed
Info: /Stage[main]/Apache/File[/etc/httpd/conf.d/25-mobile.seusite.com.br.conf]: Filebucketed /etc/httpd/conf.d/25-mobile.seusite.com.br.conf to puppet with sum ed928ada5c97974fddc0bc4cbf268483
Notice: /Stage[main]/Apache/File[/etc/httpd/conf.d/25-mobile.seusite.com.br.conf]/ensure: removed
Info: FileBucket got a duplicate file {md5}41f59421026a473a0378c58d539069c6
Info: /Stage[main]/Apache/File[/etc/httpd/conf.d/ssl.conf.rpmnew]: Filebucketed /etc/httpd/conf.d/ssl.conf.rpmnew to puppet with sum 41f59421026a473a0378c58d539069c6
Notice: /Stage[main]/Apache/File[/etc/httpd/conf.d/ssl.conf.rpmnew]/ensure: removed
Info: FileBucket got a duplicate file {md5}e92bea7e9d70a9ecdc61edd7c0a2f59a
Info: /Stage[main]/Apache/File[/etc/httpd/conf.d/README]: Filebucketed /etc/httpd/conf.d/README to puppet with sum e92bea7e9d70a9ecdc61edd7c0a2f59a
Notice: /Stage[main]/Apache/File[/etc/httpd/conf.d/README]/ensure: removed
Info: /etc/httpd/conf.d: Scheduling refresh of Class[Apache::Service]
Info: Class[Apache::Service]: Scheduling refresh of Service[httpd]
Notice: /Stage[main]/Apache::Service/Service[httpd]/ensure: ensure changed 'stopped' to 'running'
Info: /Stage[main]/Apache::Service/Service[httpd]: Unscheduling refresh on Service[httpd]
Notice: Finished catalog run in 30.00 seconds

Veja que o puppet instalou o apache, ajustou os arquivos de configuração e reiniciou o serviço, tudo em 30 segundos, agora podemos verificar se a porta 80 está como LISTEN.

netstat -ntpl|grep :80
tcp        0      0 :::80        :::*     LISTEN       2414/httpd

Podemos verificar se está respondendo

curl localhost

Acompanhe a saída

retorno do acesso localhost
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<html>
 <head>
  <title>Index of /</title>
 </head>
 <body>
<h1>Index of /</h1>
<table><tr><th><img src="/icons/blank.gif" alt="[ICO]"></th><th><a href="?C=N;O=D">Name</a></th><th><a href="?C=M;O=A">Last modified</a></th><th><a href="?C=S;O=A">Size</a></th><th><a href="?C=D;O=A">Description</a></th></tr><tr><th colspan="5"><hr></th></tr>
<tr><th colspan="5"><hr></th></tr>
</table>
</body></html>

Veja que o site está respondendo perfeitamente. Vale a pena mencionar que o diretório apache, seja no Debian ou no CentOS, sofrerá uma mudança na organização interna de diretórios e arquivos, isto é uma característica deste módulo, vai ficar diferente, mas tudo vai funcionar e seu servidor web estará devidamente automatizado.

5.2 Criando vhosts

Vamos criar um VHOST para cada um dos seguintes sites

http://www.seusite.com.br
http://blog.seusite.com.br
http://mobile.seusite.com.br
http://intranet.seusite.com.br

Vamos ao código

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node "apache.hacklab" {

  include apache
  include apache::mod::php
  include apache::mod::alias
  include apache::mod::rewrite
  include apache::mod::ssl
  include apache::mod::vhost_alias
   
   # criando vhost simples

  apache::vhost { 'www.seusite.com.br':
      port          => '80',
      docroot       => '/var/www/seusite',
  }

   # criando vhost especificando owners e options
  
  apache::vhost { 'blog.seusite.com.br':
      port          => '80',
      docroot       => '/var/www/blog',
      docroot_owner => 'apache',
      docroot_group => 'apache',
      options       => ['Indexes','FollowSymLinks','MultiViews'],
      override      => ['none'],
  }
 
   # criando um vhost especificando configurações personalizadas de php

  apache::vhost { 'mobile.seusite.com.br':
                port            => '80',
                docroot         => '/var/www/activesync',
                docroot_owner   => 'apache',
                docroot_group   => 'apache',
                options         =>  ['All'],
                override        =>  ['All'],
                custom_fragment => [
                        "php_flag magic_quotes_gpc off \n",
                        "php_flag register_globals off \n",
                        "php_flag magic_quotes_runtime off \n",
                        "php_flag short_open_tag on \n",
                        "Alias /Microsoft-Server-ActiveSync /var/www/activesync/index.php"
                ],
        }


   # criando vhost ssl usando certificados default

  apache::vhost { 'intranet.seusite.com.br':
      port          => '443',
      docroot       => '/var/www/intranet',
      docroot_owner => 'apache',
      docroot_group => 'apache',
      options       => ['all'],
      override      => ['all'],
      ssl           => true,
      # pode especificar um certificado se quiser
      #ssl_cert => '/etc/ssl/intranet.cert',
      #ssl_key  => '/etc/ssl/intranet.key',
  }
}

Cödigo no lugar, agora vamos rodar o puppet

puppet agent -t

Acompanhe a saída

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Info: Retrieving plugin
Info: Loading facts in /etc/puppet/modules/concat/lib/facter/concat_basedir.rb
Info: Loading facts in /etc/puppet/modules/stdlib/lib/facter/puppet_vardir.rb
Info: Loading facts in /etc/puppet/modules/stdlib/lib/facter/root_home.rb
Info: Loading facts in /etc/puppet/modules/stdlib/lib/facter/pe_version.rb
Info: Loading facts in /etc/puppet/modules/stdlib/lib/facter/facter_dot_d.rb
Info: Loading facts in /var/lib/puppet/lib/facter/puppet_vardir.rb
Info: Loading facts in /var/lib/puppet/lib/facter/root_home.rb
Info: Loading facts in /var/lib/puppet/lib/facter/pe_version.rb
Info: Loading facts in /var/lib/puppet/lib/facter/concat_basedir.rb
Info: Loading facts in /var/lib/puppet/lib/facter/facter_dot_d.rb
Info: Caching catalog for puppet.hacklab
Info: Applying configuration version '1395825015'
Notice: /Stage[main]/Main/Node[puppet.hacklab]/Apache::Vhost[intranet.seusite.com.br]/Apache::Listen[443]/Concat::Fragment[Listen 443]/File[/var/lib/puppet/concat/_etc_httpd_conf_ports.conf/fragments/10_Listen 443]/ensure: created
Info: /Stage[main]/Main/Node[puppet.hacklab]/Apache::Vhost[intranet.seusite.com.br]/Apache::Listen[443]/Concat::Fragment[Listen 443]/File[/var/lib/puppet/concat/_etc_httpd_conf_ports.conf/fragments/10_Listen 443]: Scheduling refresh of Exec[concat_/etc/httpd/conf/ports.conf]
Notice: /Stage[main]/Main/Node[puppet.hacklab]/Apache::Vhost[intranet.seusite.com.br]/Apache::Namevirtualhost[*:443]/Concat::Fragment[NameVirtualHost *:443]/File[/var/lib/puppet/concat/_etc_httpd_conf_ports.conf/fragments/10_NameVirtualHost *:443]/ensure: created
Info: /Stage[main]/Main/Node[puppet.hacklab]/Apache::Vhost[intranet.seusite.com.br]/Apache::Namevirtualhost[*:443]/Concat::Fragment[NameVirtualHost *:443]/File[/var/lib/puppet/concat/_etc_httpd_conf_ports.conf/fragments/10_NameVirtualHost *:443]: Scheduling refresh of Exec[concat_/etc/httpd/conf/ports.conf]
Notice: /Stage[main]/Apache/Concat[/etc/httpd/conf/ports.conf]/Exec[concat_/etc/httpd/conf/ports.conf]/returns: executed successfully
Notice: /Stage[main]/Apache/Concat[/etc/httpd/conf/ports.conf]/Exec[concat_/etc/httpd/conf/ports.conf]: Triggered 'refresh' from 2 events
Notice: /Stage[main]/Apache/Concat[/etc/httpd/conf/ports.conf]/File[/etc/httpd/conf/ports.conf]/content:
--- /etc/httpd/conf/ports.conf    2014-03-26 06:08:06.382816833 -0300
+++ /tmp/puppet-file20140326-3642-1h8p4wc-0   2014-03-26 06:10:34.465816827 -0300
@@ -3,5 +3,7 @@
 # Managed by Puppet
 # ************************************

+Listen 443
 Listen 80
+NameVirtualHost *:443
 NameVirtualHost *:80

Info: FileBucket got a duplicate file {md5}ac3b658e433eba85f350d4068b0ef826
Info: /Stage[main]/Apache/Concat[/etc/httpd/conf/ports.conf]/File[/etc/httpd/conf/ports.conf]: Filebucketed /etc/httpd/conf/ports.conf to puppet with sum ac3b658e433eba85f350d4068b0ef826
Notice: /Stage[main]/Apache/Concat[/etc/httpd/conf/ports.conf]/File[/etc/httpd/conf/ports.conf]/content: content changed '{md5}ac3b658e433eba85f350d4068b0ef826' to '{md5}bc388698a3c11221869ded2030460038'
Info: Concat[/etc/httpd/conf/ports.conf]: Scheduling refresh of Class[Apache::Service]
Notice: /Stage[main]/Main/Node[puppet.hacklab]/Apache::Vhost[intranet.seusite.com.br]/File[25-intranet.seusite.com.br.conf]/ensure: created
Info: /Stage[main]/Main/Node[puppet.hacklab]/Apache::Vhost[intranet.seusite.com.br]/File[25-intranet.seusite.com.br.conf]: Scheduling refresh of Service[httpd]
Notice: /Stage[main]/Main/Node[puppet.hacklab]/Apache::Vhost[mobile.seusite.com.br]/File[25-mobile.seusite.com.br.conf]/ensure: created
Info: /Stage[main]/Main/Node[puppet.hacklab]/Apache::Vhost[mobile.seusite.com.br]/File[25-mobile.seusite.com.br.conf]: Scheduling refresh of Service[httpd]
Notice: /Stage[main]/Main/Node[puppet.hacklab]/Apache::Vhost[blog.seusite.com.br]/File[25-blog.seusite.com.br.conf]/ensure: created
Info: /Stage[main]/Main/Node[puppet.hacklab]/Apache::Vhost[blog.seusite.com.br]/File[25-blog.seusite.com.br.conf]: Scheduling refresh of Service[httpd]
Info: Class[Apache::Service]: Scheduling refresh of Service[httpd]
Notice: /Stage[main]/Main/Node[puppet.hacklab]/Apache::Vhost[www.seusite.com.br]/File[25-www.seusite.com.br.conf]/ensure: created
Info: /Stage[main]/Main/Node[puppet.hacklab]/Apache::Vhost[www.seusite.com.br]/File[25-www.seusite.com.br.conf]: Scheduling refresh of Service[httpd]
Notice: /Stage[main]/Apache::Service/Service[httpd]: Triggered 'refresh' from 5 events
Notice: Finished catalog run in 10.81 seconds

Em menos de 11 segundos ele fez a configuração de 4 vhosts em nosso servidor, agora você só precisa colocar os arquivos de aplicação no diretório que foi declarado em seus vhosts, afinal o servidor já está pronto para rodando.

6. Amarrando as pontas

Neste post eu abordei a instalação do apache e a criação de vhosts simples, mas esse módulo tem muito, muito mais recursos, leia o README para ver, conhecer e entender seus vastos recursos.

O uso do Puppet torna a administração do seu servidor web um processo limpo, organizado, rápido e eficiente, vale a pena usá-lo.

7. Referências

  • https://github.com/puppetlabs/puppetlabs-apache
  • http://forge.puppetlabs.com/puppetlabs
  • http://docs.puppetlabs.com/puppet/latest/reference/modules_fundamentals.html

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