Autofs Puppet Module

Table of Contents

1. Description - - What the module does and why it is useful
2. Setup - The basics of getting started with Autofs

• The module manages the following
• Requirements
• Incompatibilities

3. Usage - Configuration options and additional functionality
4. Reference - An under-the-hood peek at what the module is doing and how
5. Limitations - OS compatibility, etc
6. Development - Guide for contributing to the module
7. Support - When you need help with this module

Description

The Autofs module is a Puppet module for managing the configuration of on-demand mounting and automatic unmounting of local and remote filesystems via autofs / automount. This is a global module designed to be used by any organization. It enables most details of Autofs configuration to be specified via the user's choice of Puppet manifest or external data.

Setup

The Module manages the following:

• Autofs package
• Autofs service
• Autofs master map (/etc/auto.master)
• Autofs map files (e.g. /etc/auto.home)

Requirements

• The stdlib Puppet module
• The concat Puppet module

Usage

The module provides one class:

include autofs

With all default parameter values, this installs, enables, and starts the autofs service, configuring it to rely on the default location for the master map. If desired, the required state of the autofs package and / or service can instead be specified explicitly via class parameters. For example,

To ensure the package is absent:

class { 'autofs':
  package_ensure => 'absent',
}

To ensure the service is disabled and not running:

class { 'autofs':
  service_ensure => 'stopped',
  service_enable => false,
}

Master Map

The module provides two compatible, built-in mechanisms for managing the content of the master map: by setting the mounts parameter of the autofs class, and by declaration of autofs::mount resources. Using these is not obligatory -- one could instead use a File resource, for instance, but using the built-in mechanisms automatically provides for the autofs service to be notified of any changes to the master map.

Note well, however, that managing the master map via this module's built-in mechanisms is an all-or-nothing affair. If any autofs mount points are managed via either of those mechanisms, then only mount points managed via those mechanisms will appear in the master map.

example

The declaration

autofs::mount { 'home':
  mount       => '/home',
  mapfile     => '/etc/auto.home',
  options     => '--timeout=120'
}

, or the equivalent element of the value of class parameter $autofs::mounts, will result in the following entry in the master map"

/home /etc/auto.home --timeout=120

The target map file, /etc/auto.home, is not affected by this.

Alternatively, this can be expressed directly in the declaration of class autofs:

class { 'autofs':
  mounts => {
    'home' => {
      'mount'   => '/home',
      'mapfile' => '/etc/auto.home',
      'options' => '--timeout=120'
    }
  }
}

or in YAML form in external Hiera data:

lookup_options:
  autofs::mounts:
    merge: hash
autofs::mounts:
  home:
    mount: '/home'
    mapfile: '/etc/auto.home'
    options: '--timeout=120'

For more information about merge behavior see the doc for:

• Lookup docs
• Hiera 5 docs if using Puppet >= 4.9

Direct Map /- argument

The autofs module supports Autofs direct maps naturally. For a direct map, simply specify the mount parameter as /-, just as is used for the purpose in the auto.master file. When this option is exercised, Autofs requires the keys in the corresponding map file to be absolute paths of mountpoint directories; this module does not validate that constraint.

example

Define:

autofs::mount { 'foo':
  mount       => '/-',
  mapfile     => '/etc/auto.foo',
  options     => '--timeout=120',
}

Hiera:

autofs::mounts:
  foo:
    mount: '/-'
    mapfile: '/etc/auto.foo'
    options: '--timeout=120'

+dir: drop-in directories

The autofs module supports the use of Autofs's +dir: option (Autofs 5.0.5 or later) to record master map content in drop-in files in a specified directory instead of directly int rhe master map. When a mount's use_dir parameter is true (default is false), the corresponding master map entry is created as a separate file in the appropriate directory instead of being written directly into the master map. The master map is still, however, ensured to contain an appropriate +dir: entry designating the chosen drop-in directory.

example

Define:

autofs::mount { 'home':
  mount       => '/home',
  mapfile     => '/etc/auto.home',
  options     => '--timeout=120',
  use_dir     => true
}

Hiera:

autofs::mounts:
  home:
    mount: '/home'
    mapfile: '/etc/auto.home'
    options: '--timeout=120'
    use_dir: true

Removing mount points

Unwanted mount points can be ensured absent to force their removal. This will remove them from the master map even if the master map is not otherwise managed (and in that specific case, without otherwise managing that file), either directly in the file or in the drop-in directory (but not both). If at least one mount point is managed present in the master map then it may also be sufficient to simply omit unwanted mount points.

example

Define:

autofs::mount { 'home':
  ensure      => 'absent',
  mount       => '/home',
  mapfile     => '/etc/auto.home',
}

Hiera:

autofs::mounts:
  home:
    ensure: 'absent'
    mount: '/home'
    mapfile: '/etc/auto.home'

Map Files

The module also provides two compatible, built-in mechanisms for managing Autofs map files: by setting the mapfiles parameter of the autofs class, and by declaration of autofs::mapfile resources. As with entries in the master map, using these is not obligatory. In fact, they are applicable only to map files written in the default (sun) map format; some other mechanism must be chosen if map files in some other format are to be managed.

As with the master map, managing map files via this module's built-in mechanisms is an all-or-nothing affair. If a map file is managed via these mechanisms then only mappings declared via these mechanisms will be included.

Note that map file management is wholly independent of master map management. Just as managing mount points in the master map does not affect corresponding map files, managing map files does not affect the master map.

For example,

autofs::mapfile { 'home':
  path     => '/etc/auto.home',
  mappings => [
    { 'key' => '*', 'options' => 'rw,soft,intr', 'fs' => 'server.example.com:/path/to/home/shares' }
  ]
}

The standard external-data representation again is associated with the module via a parameter of class autofs:

autofs::mapfiles:
  home:
    path: '/etc/auto.home'
    mappings:
      - key: '*'
        options: 'rw,soft,intr'
        fs: 'server.example.com:/path/to/home/shares'

Whichever form is used, the resulting mapping in file /etc/auto.home is

*	-rw,soft,intr	server.example.com:/path/to/home/shares

Executable map files

By default, map files are marked as 0644. If a map file must be executable, you can set the execute parameter to enforce 0755.

autofs::mapfile { 'home':
  path    => '/etc/auto.data',
  execute => true
}

Multiple mappings in the same file

Multiple mappings may be declared for the same map file, either in the same autofs::mapfile resource (or an entry in the $::autofs::mappings class parameter or corresponding external data), or in one or more separate autofs::mapping resources:

autofs::mapfile { '/mnt/data':
}

autofs::mapping { '/mnt/data_dataA':
  mapfile => '/mnt/data',
  key     => 'dataA',
  options => 'ro',
  fs      => 'remote.com:/exports/dataA'
}

autofs::mapping { '/mnt/data_dataB':
  mapfile => '/mnt/data',
  key     => 'dataB',
  options => 'rw,noexec',
  fs      => 'remote.com:/exports/dataB'
}

The resulting content of file /mnt/data would be

dataA	-ro	remote.com:/exports/dataA
dataB	-rw,noexec	remote.com:/exports/dataB

Removing Entries

To remove entries from a managed mapfile simply remove the element from the mappings array in your manifest or external data. If the mapping is expressed via a separate autofs::mapping declaration, then either omit that resource or ensure it absent:

Example:

autofs::mapping { 'data':
  ensure      => 'absent',
  mapfile     => '/etc/auto.data',
  key         => 'dataA'
  fs          => 'example.com:/exports/dataA'
}

Reference

Classes

Public Classes

• autofs: Main class. Contains or calls all other classes or defines.

Private Classes

• autofs::package: Handles autofs packages.
• autofs::service: Handles the service.

Parameters

mounts

Optional.

Data type: Hash

A hash of options that describe Autofs mount points for which entries should appear in the master map. Each entry is equivalent to the title and a hash of the parameters of one autofs::mount resource.

mapfiles

Optional.

Data type: Hash

A hash of options that describe Autofs map files that should be managed. Each entry is equivalent to the title and a hash of the parameters of one autofs::mapfile resource.

package_name

Data type: String or Array[String]

The name of the Autofs package(s). System-appropriate values for a variety of target environments are included with the module, so this parameter does not usually need to be specified explicitly.

package_ensure

Data type: String

Determines the required state of the autofs package. Can be set to: installed, absent, lastest, or a specific version string.

Default: 'installed'

service_name

Data type: String

The name of the Autofs service, as appropriate for use with the target environment's tools. System-appropriate values for a variety of target environments are included with the module, so this parameter does not usually need to be specified explicitly.

service_ensure

Data type: Enum['running', 'stopped']

Determines required state of the autofs service.

Default: 'running'

service_enable

Data type: Boolean

Determines whether the autofs service should start at system boot.

Default: true

reload_command

Optional.

Data type: String

If specified, a command to execute in the target environment to reload Autofs configuration without restarting the service.

auto_master_map

Data type: String

The absolute path to the Autofs master map. The standard paths used on a variety of supported environments are included with the module, so this parameter does not usually need to be specified explicitly.

map_file_owner

Data type: String

The system user who should own the master map and any managed map files. May be expressed either as a name or as a uid (in string form). The module defaults to 'root' for most environments and provides alternative defaults for supported target environments that ordinarily differ in this regard, so it is rarely necessary to specify this parameter explicitly unless a non-standard value is desired.

map_file_group

Data type: String

The system group to which the master map and any managed map files should be assigned. May be expressed either as a name or as a gid (in string form). The module defaults to 'root' for most environments and provides alternative defaults for supported target environments that ordinarily differ in this regard, so it is rarely necessary to specify this parameter explicitly unless a non-standard value is desired.

Defines

Public Defines

• autofs::mount: Describes an entry in the master map.
• autofs::mapfile: Describes a (sun-format) map file and, optionally, some or all of its contents.
• autofs::mapping: Describes one (sun-format) filesystem mapping in a specific map file.

Parameters for autofs::mount

ensure

Data type: String

The desired state of the mount definition in the master map. If set to absent, the resulting master map will not contain a mountpoint definition corresponding to this resource. Defaults to present.

mount

Data type: Stblib::Absolutepath

The Autofs mountpoint described by this resource. When this parameter has the value /-, this resource describes a direct mount, and the keys in the corresponding map file must be absolute paths to mountpoint directories. Otherwise, this resource describes an indirect map, and this parameter is a base path to the automounted directories described by the corresponding map file. Defaults to the title of this autofs::mount.

mapfile

Data type: Stdlib::Absolutepath or Autofs::MapEntry

This parameter designates the automount map serving this mount. Autofs supports a variety of options here, but most commonly this is either an absolute path to a map file or the special string -hosts.

options

Optional.

Data type: String

This parameter provides Autofs and/or mount options to be specified for this mount point in the master map.

order

Data type: Integer

This parameter specifies the relative order of this mount point in the master map.

Default: 1

master

Data type: Stdlib::Absolutepath

This parameter specifies the path to the master map. It's system-dependent default value is usually the right choice.

Default: (system-dependent)

map_dir

Data type: Stdlib::Absolutepath

This parameter specifies the path to the Autofs master map drop-in directory in which this mount's definition should reside. This may differ from mount to mount. Applies only to autofs 5.0.5 or later, and only when the use_dir parameter is set to true.

Default: '/etc/auto.master.d'

use_dir

Data type: Boolean

This parameter specifies whether to manage this mount point via its own file in a drop-in directory, as opposed to recording it directly in the master map. Relevant only for autofs 5.0.5 or later.

Default: false

Parameters for autofs::mapfile

ensure

Data type: String

This parameter specifies the target state of this map file, either present or absent.

Default: 'present'

path

Data type: Stdlib::Absolutepath

The absolute path to the map file managed by this resource. e.g '/etc/auto.data'.

Default: the title of this resource.

mappings

Data type: Array of Autofs::Fs_mapping

Each element corresponds to one (sun-format) mapping in the file, with a key, usually some mount options, and a specification of the filesystem(s) to mount. The filesystem specification format is extremely loose, accommodating not only the typical case of a single remote filesystem spec, but also the wide variety of Autofs-recognized alternatives such as shared mounts, multi-mounts, and replicated mounts.

Example:

[
  { 'key' => 'dataA', 'options' => 'rw,noexec', 'fs' => 'remote.net:/exports/dataA' }
]

Default: []

replace

Data type: Boolean

This parameter specifies whether this map file's contents should be managed in the event that the file already exists at the start of the Puppet run. It affects not only mappings specified directly in this resource, but also any that are specified for this map file via separate autofs::mapping resources.

Default: true

execute

Data type: Boolean

This parameter specifies whether this map file should be executable.

Default: false

Parameters for autofs::mapping

ensure

Data type: String

This parameter specifies whether the mapping it describes should be present in the target map file, provided that that map file is managed via an autofs::mapfile resource or the equivalent data among the parameters of class autofs. Setting the value absent is substantially equivalent to altogether omitting any declaration of this resource.

Default: 'present'

mapfile

The absolute path to the target map file hosting this mapping.

key

Data type: String matching /\A\S+\z/

The autofs key for this mapping.

fs

Data type: String matching /\S/

The filesystem specification for this mapping. The Sun map format permits a number of alternatives beyond simple, single mappings, and this module opts to allow wide latitude in filesystem specification instead of trying to codify all the alternatives.

Simple example: 'remote.net:/exports/data'

options

Optional.

Data type: String matching /A\S+\z/, or an Array of such Strings

Autofs and mount options specific to this mapping. If given as and array then elements are joined with commas (,) to form a single option string. Options should not be prefixed with a hyphen (-) unless that is part of the option itself. Options whose names do begin with a hyphen must not be first.

example: 'rw,noexec,nodev'

example: [ 'rw', 'noexec', 'nodev' ]

order

Data type: Integer

The relative order of this mapping in the target map file. Does not ordinarily need to be specified, because the map file order will be stable either way, and the order matters only if the map contains more than one mapping for the same key.

Default: 10

Limitations

Removals

Directly calling the autofs::package and autofs::service classes is disabled in 3.0.0. These are now private classes.

The autofs::map defined type is no longer documented or supported, and it will be removed from a future version.

The direct, executable, mapcontents, mapfile_manage, and replace parameters of autofs::mount are removed in 5.0.0, the first having already been ineffective in 4.3.0, and the others no longer being relevant starting in 5.0.0.

Puppet platforms

Compatible with Puppet 4 or greater only. Puppet 4.6.0 or greater (including Puppet 5) will provide best results.

Operating Systems

• Supported
  • Ubuntu
    • 14.04
    • 16.04
    • 18.04
  • CentOS/RHEL/Scientific/Oracle Linux
    • 6.x
    • 7.x
  • SLES
    • 11 Service Pack 4
    • 12 Service Pack 1
  • OpenSUSE 13.1
  • Debian
    • 7 "Wheezy"
    • 8 "Jessie"
• Self Support - should work, support not provided by developer
  • Solaris 10, 11
  • AIX 7.1, 7.2
  • Fedora 24, 25
  • SLES 10
  • CentOS/RHEL/Scientific/Oracle Linux 5.x
• Unsupported
  • Windows (Autofs not available)
  • Mac OS X

Development

Please see the CONTRIBUTING.md file for instructions regarding development environments and testing.

Authors

• Vox Pupuli: voxpupuli@groups.io
• David Hollinger: david.hollinger@moduletux.com