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apache2 (126) Versions 1.2.0

Installs and configures apache2

Policyfile
Berkshelf
Knife
cookbook 'apache2', '= 1.2.0', :supermarket
cookbook 'apache2', '= 1.2.0'
knife supermarket install apache2
knife supermarket download apache2
README
Dependencies
Quality -%

Description

This cookbook provides a complete Debian/Ubuntu style Apache HTTPD
configuration. Non-Debian based distributions such as Red Hat/CentOS,
ArchLinux and others supported by this cookbook will have a
configuration that mimics Debian/Ubuntu style as it is easier to
manage with Chef.

Debian-style Apache configuration uses scripts to manage modules and
sites (vhosts). The scripts are:

  • a2ensite
  • a2dissite
  • a2enmod
  • a2dismod

This cookbook ships with templates of these scripts for non
Debian/Ubuntu platforms. The scripts are used in the Definitions
below.

Requirements

Ohai and Chef:

  • Ohai: 0.6.12+
  • Chef: 0.10.10+

As of v1.2.0, this cookbook makes use of node['platform_family'] to
simplify platform selection logic. This attribute was introduced in
Ohai v0.6.12. The recipe methods were introduced in Chef v0.10.10. If
you must run an older version of Chef or Ohai, use version 1.1.16 of
this cookbook
.

Cookbooks:

This cookbook doesn't have direct dependencies on other cookbooks, as
none are needed for the default recipe or the general use cases.

Depending on your OS configuration and security policy, you may need
additional recipes or cookbooks for this cookbook's recipes to
converge on the node. In particular, the following Operating System
settings may affect the behavior of this cookbook:

  • apt cache outdated
  • SELinux enabled
  • IPtables
  • Compile tools
  • 3rd party repositories

On Ubuntu/Debian, use Opscode's apt cookbook to ensure the package
cache is updated so Chef can install packages, or consider putting
apt-get in your bootstrap process or
knife bootstrap template.

On RHEL, SELinux is enabled by default. The selinux cookbook
contains a permissive recipe that can be used to set SELinux to
"Permissive" state. Otherwise, additional recipes need to be created
by the user to address SELinux permissions.

The easiest but certainly not ideal way to deal with IPtables is
to flush all rules. Opscode does provide an iptables cookbook but is
migrating from the approach used there to a more robust solution
utilizing a general "firewall" LWRP that would have an "iptables"
provider. Alternately, you can use ufw, with Opscode's ufw and
firewall cookbooks to set up rules. See those cookbooks' READMEs for
documentation.

Build/compile tools may not be installed on the system by default.
Some recipes (e.g., apache2::mod_auth_openid) build the module from
source. Use Opscode's build-essential cookbook to get essential
build packages installed.

On ArchLinux, if you are using the apache2::mod_auth_openid recipe,
you also need the pacman cookbook for the pacman_aur LWRP. Put
recipe[pacman] on the node's expanded run list (on the node or in a
role). This is not an explicit dependency because it is only required
for this single recipe and platform; the pacman default recipe
performs pacman -Sy to keep pacman's package cache updated.

The apache2::god_monitor recipe uses a definition from the god
cookbook. Include recipe[god] in the node's expanded run list to
ensure that the cookbook is available to the node, and to set up god.

Platforms:

The following platforms and versions are tested and supported using
Opscode's test-kitchen.

  • Ubuntu 10.04, 12.04
  • CentOS 5.8, 6.3

The following platform families are supported in the code, and are
assumed to work based on the successful testing on Ubuntu and CentOS.

  • Debian
  • Red Hat (rhel)
  • Fedora
  • Amazon Linux

The following platforms are also supported in the code, have been
tested manually but are not tested under test-kitchen.

  • SUSE/OpenSUSE
  • ArchLinux
  • FreeBSD

Notes for RHEL Family:

On Red Hat Enterprise Linux and derivatives, the EPEL repository may
be necessary to install packages used in certain recipes. The
apache2::default recipe, however, does not require any additional
repositories. Opscode's yum cookbook contains a recipe to add the
EPEL repository. See Examples for more information.

Notes for FreeBSD:

The apache2::mod_php5 recipe depends on the freebsd cookbook,
which it uses to set the correct options for compiling the php5 port
from sources. You need to ensure the freebsd is in the expanded run
list, or this recipe will fail. We don't set an explicit dependency
because we feel the freebsd cookbook is something users would want
on their nodes, and due to the generality of this cookbook we don't
want additional specific dependencies.

Tests

This cookbook in the
source repository
contains minitest and cucumber tests. This is an initial proof of
concept that will be fleshed out with more supporting infrastructure
at a future time.

Please see the CONTRIBUTING file for information on how to add tests
for your contributions.

Attributes

This cookbook uses many attributes, broken up into a few different
kinds.

Platform specific

In order to support the broadest number of platforms, several
attributes are determined based on the node's platform. See the
attributes/default.rb file for default values in the case statement at
the top of the file.

  • node['apache']['dir'] - Location for the Apache configuration
  • node['apache']['log_dir'] - Location for Apache logs
  • node['apache']['user'] - User Apache runs as
  • node['apache']['group'] - Group Apache runs as
  • node['apache']['binary'] - Apache httpd server daemon
  • node['apache']['icondir'] - Location for icons
  • node['apache']['cache_dir'] - Location for cached files used by Apache itself or recipes
  • node['apache']['pid_file'] - Location of the PID file for Apache httpd
  • node['apache']['lib_dir'] - Location for shared libraries
  • node['apache']['default_site_enabled'] - Default site enabled. Defaults to true on redhat-family platforms
  • node['apache']['ext_status'] - if true, enables ExtendedStatus for mod_status

General settings

These are general settings used in recipes and templates. Default
values are noted.

  • node['apache']['listen_ports'] - Ports that httpd should listen on. Default is an array of ports 80 and 443.
  • node['apache']['contact'] - Value for ServerAdmin directive. Default "ops@example.com".
  • node['apache']['timeout'] - Value for the Timeout directive. Default is 300.
  • node['apache']['keepalive'] - Value for the KeepAlive directive. Default is On.
  • node['apache']['keepaliverequests'] - Value for MaxKeepAliveRequests. Default is 100.
  • node['apache']['keepalivetimeout'] - Value for the KeepAliveTimeout directive. Default is 5.
  • node['apache']['default_modules'] - Array of module names. Can take "mod_FOO" or "FOO" as names, where FOO is the apache module, e.g. "mod_status" or "status".

The modules listed in default_modules will be included as recipes in recipe[apache::default].

Prefork attributes

Prefork attributes are used for tuning the Apache HTTPD prefork MPM
configuration.

  • node['apache']['prefork']['startservers'] - initial number of server processes to start. Default is 16.
  • node['apache']['prefork']['minspareservers'] - minimum number of spare server processes. Default 16.
  • node['apache']['prefork']['maxspareservers'] - maximum number of spare server processes. Default 32.
  • node['apache']['prefork']['serverlimit'] - upper limit on configurable server processes. Default 400.
  • node['apache']['prefork']['maxclients'] - Maximum number of simultaneous connections.
  • node['apache']['prefork']['maxrequestsperchild'] - Maximum number of request a child process will handle. Default 10000.

Worker attributes

Worker attributes are used for tuning the Apache HTTPD worker MPM
configuration.

  • node['apache']['worker']['startservers'] - Initial number of server processes to start. Default 4
  • node['apache']['worker']['maxclients'] - Maximum number of simultaneous connections. Default 1024.
  • node['apache']['worker']['minsparethreads'] - Minimum number of spare worker threads. Default 64
  • node['apache']['worker']['maxsparethreads'] - Maximum number of spare worker threads. Default 192.
  • node['apache']['worker']['maxrequestsperchild'] - Maximum number of requests a child process will handle.

mod_auth_openid attributes

The following attributes are in the attributes/mod_auth_openid.rb
file. Like all Chef attributes files, they are loaded as well, but
they're logistically unrelated to the others, being specific to the
mod_auth_openid recipe.

  • node['apache']['mod_auth_openid']['checksum'] - sha256sum of the tarball containing the source.
  • node['apache']['mod_auth_openid']['version'] - version of the mod_auth_openid to download.
  • node['apache']['mod_auth_openid']['cache_dir'] - the cache directory is where the sqlite3 database is stored. It is separate so it can be managed as a directory resource.
  • node['apache']['mod_auth_openid']['dblocation'] - filename of the sqlite3 database used for directive AuthOpenIDDBLocation, stored in the cache_dir by default.
  • node['apache']['mod_auth_openid']['configure_flags'] - optional array of configure flags passed to the ./configure step in the compilation of the module.

Recipes

Most of the recipes in the cookbook are for enabling Apache modules.
Where additional configuration or behavior is used, it is documented
below in more detail.

The following recipes merely enable the specified module: mod_alias,
mod_basic, mod_digest, mod_authn_file, mod_authnz_ldap,
mod_authz_default, mod_authz_groupfile, mod_authz_host,
mod_authz_user, mod_autoindex, mod_cgi, mod_dav_fs,
mod_dav_svn, mod_deflate, mod_dir, mod_env, mod_expires,
mod_headers, mod_ldap, mod_log_config, mod_mime,
mod_negotiation, mod_proxy, mod_proxy_ajp, mod_proxy_balancer,
mod_proxy_connect, mod_proxy_http, mod_python, mod_rewrite,
mod_setenvif, mod_status, mod_wsgi, mod_xsendfile.

On RHEL Family distributions, certain modules ship with a config file
with the package. The recipes here may delete those configuration
files to ensure they don't conflict with the settings from the
cookbook, which will use per-module configuration in
/etc/httpd/mods-enabled.

default

The default recipe does a number of things to set up Apache HTTPd. It
also includes a number of modules based on the attribute
node['apache']['default_modules'] as recipes.

logrotate

Logrotate adds a logrotate entry for your apache2 logs. This recipe
requires the logrotate cookbook; ensure that recipe[logrotate] is
in the node's expanded run list.

mod_auth_cas

This recipe installs the proper package and enables the auth_cas
module. It can install from source or package. Package is the default,
set the attribute node['apache']['mod_auth_cas']['from_source'] to
true to enable source installation. Modify the version to install by
changing the attribute
node['apache']['mod_auth_cas']['source_revision']. It is a version
tag by default, but could be master, or another tag, or branch.

The module configuration is written out with the CASCookiePath set,
otherwise an error loading the module may cause Apache to not start.

Note: This recipe does not work on EL 6 platforms unless
epel-testing repository is enabled (outside the scope of this
cookbook), or the package version 1.0.8.1-3.el6 or higher is otherwise
available to the system due to this bug:

https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=708550

mod_auth_openid

Changed via COOK-915

This recipe compiles the module from source. In addition to
build-essential, some other packages are included for installation
like the GNU C++ compiler and development headers.

To use the module in your own cookbooks to authenticate systems using
OpenIDs, specify an array of OpenIDs that are allowed to authenticate
with the attribute node['apache']['allowed_openids']. Use the
following in a vhost to protect with OpenID authentication:

AuthType OpenID require user <%= node['apache']['allowed_openids'].join(' ') %>
AuthOpenIDDBLocation <%= node['apache']['mod_auth_openid']['dblocation'] %>

Change the DBLocation with the attribute as required; this file is in
a different location than previous versions, see below. It should be a
sane default for most platforms, though, see
attributes/mod_auth_openid.rb.

Changes from COOK-915:

  • AuthType OpenID instead of AuthOpenIDEnabled On.
  • require user instead of AuthOpenIDUserProgram.
  • A bug(?) in mod_auth_openid causes it to segfault when attempting to update the database file if the containing directory is not writable by the HTTPD process owner (e.g., www-data), even if the file is writable. In order to not interfere with other settings from the default recipe in this cookbook, the db file is moved.

mod_fastcgi

Install the fastcgi package and enable the module.

Only work on Debian/Ubuntu

mod_fcgid

Installs the fcgi package and enables the module. Requires EPEL on
RHEL family.

On RHEL family, this recipe will delete the fcgid.conf and on version
6+, create the /var/run/httpd/mod_fcgid` directory, which prevents the
emergency error:

[emerg] (2)No such file or directory: mod_fcgid: Can't create shared memory for size XX bytes

mod_php5

Simply installs the appropriate package on Debian, Ubuntu and
ArchLinux.

On Red Hat family distributions including Fedora, the php.conf that
comes with the package is removed. On RHEL platforms less than v6, the
php53 package is used.

mod_ssl

Besides installing and enabling mod_ssl, this recipe will append
port 443 to the node['apache']['listen_ports'] attribute array and
update the ports.conf.

god_monitor

Sets up a god monitor for Apache. External requirements are the
god and runit cookbooks from Opscode. When using this recipe,
include recipe[god] in the node's expanded run list to ensure the
client downloads it; god depends on runit so that will also be
downloaded.

Note This recipe is not tested under test-kitchen yet and is
pending fix in COOK-744.

Definitions

The cookbook provides a few definitions. At some point in the future
these definitions may be refactored into lightweight resources and
providers as suggested by
foodcritic rule FC015.

apache_conf

Sets up configuration file for an Apache module from a template. The
template should be in the same cookbook where the definition is used.
This is used by the apache_module definition and is not often used
directly.

This will use a template resource to write the module's configuration
file in the mods-available under the Apache configuration directory
(node['apache']['dir']). This is a platform-dependent location. See
apache_module.

Parameters:

  • name - Name of the template. When used from the apache_module, it will use the same name as the module.

Examples:

Create #{node['apache']['dir']}/mods-available/alias.conf.

apache_conf "alias"

apache_module

Enable or disable an Apache module in
#{node['apache']['dir']}/mods-available by calling a2enmod or
a2dismod to manage the symbolic link in
#{node['apache']['dir']}/mods-enabled. If the module has a
configuration file, a template should be created in the cookbook where
the definition is used. See Examples.

Parameters:

  • name - Name of the module enabled or disabled with the a2enmod or a2dismod scripts.
  • enable - Default true, which uses a2enmod to enable the module. If false, the module will be disabled with a2dismod.
  • conf - Default false. Set to true if the module has a config file, which will use apache_conf for the file.
  • filename - specify the full name of the file, e.g.

Examples:

Enable the ssl module, which also has a configuration template in templates/default/ssl.conf.erb.

apache_module "ssl" do
  conf true
end

Enable the php5 module, which has a different filename than the module default:

apache_module "php5" do
  filename "libphp5.so"
end

Disable a module:

apache_module "disabled_module" do
  enable false
end

See the recipes directory for many more examples of apache_module.

apache_site

Enable or disable a VirtualHost in
#{node['apache']['dir']}/sites-available by calling a2ensite or
a2dissite to manage the symbolic link in
#{node['apache']['dir']}/sites-enabled.

The template for the site must be managed as a separate resource. To
combine the template with enabling a site, see web_app.

Parameters:

  • name - Name of the site.
  • enable - Default true, which uses a2ensite to enable the site. If false, the site will be disabled with a2dissite.

web_app

Manage a template resource for a VirtualHost site, and enable it with
apache_site. This is commonly done for managing web applications
such as Ruby on Rails, PHP or Django, and the default behavior
reflects that. However it is flexible.

This definition includes some recipes to make sure the system is
configured to have Apache and some sane default modules:

  • apache2
  • apache2::mod_rewrite
  • apache2::mod_deflate
  • apache2::mod_headers

It will then configure the template (see Parameters and
Examples below), and enable or disable the site per the enable
parameter.

Parameters:

Current parameters used by the definition:

  • name - The name of the site. The template will be written to #{node['apache']['dir']}/sites-available/#{params['name']}.conf
  • cookbook - Optional. Cookbook where the source template is. If this is not defined, Chef will use the named template in the cookbook where the definition is used.
  • template - Default web_app.conf.erb, source template file.
  • enable - Default true. Passed to the apache_site definition.

Additional parameters can be defined when the definition is called in
a recipe, see Examples.

Examples:

All parameters are passed into the template. You can use whatever you
like. The apache2 cookbook comes with a web_app.conf.erb template as
an example. The following parameters are used in the template:

  • server_name - ServerName directive.
  • server_aliases - ServerAlias directive. Must be an array of aliases.
  • docroot - DocumentRoot directive.
  • application_name - Used in RewriteLog directive. Will be set to the name parameter.

To use the default web_app, for example:

web_app "my_site" do
  server_name node['hostname']
  server_aliases [node['fqdn'], "my-site.example.com"]
  docroot "/srv/www/my_site"
end

The parameters specified will be used as:

  • @params[:server_name]
  • @params[:server_aliases]
  • @params[:docroot]

In the template. When you write your own, the @ is significant.

For more information about Definitions and parameters, see the
Chef Wiki

Usage

Using this cookbook is relatively straightforward. Add the desired
recipes to the run list of a node, or create a role. Depending on your
environment, you may have multiple roles that use different recipes
from this cookbook. Adjust any attributes as desired. For example, to
create a basic role for web servers that provide both HTTP and HTTPS:

% cat roles/webserver.rb
name "webserver"
description "Systems that serve HTTP and HTTPS"
run_list(
  "recipe[apache2]",
  "recipe[apache2::mod_ssl]"
)
default_attributes(
  "apache2" => {
    "listen_ports" => ["80", "443"]
  }
)

For examples of using the definitions in your own recipes, see their
respective sections above.

License and Authors

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

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This cookbook has no specified dependencies.

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