nfs

Table of Contents

1. Module Description - What the module does and why it is useful
2. Setup - The basics of getting started with derdanne-nfs
   • What derdanne-nfs affects
   • Setup requirements
   • Beginning with derdanne-nfs
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

Module Description

Github Master:

This module installs, configures and manages everything on NFS clients and servers.

This module is a complete refactor of the module haraldsk/nfs, because Harald Skoglund sadly is not maintaining his module actively anymore. It is stripped down to use only the class 'nfs' and parametrized to act as a server, client or both with the parameters 'server_enabled' and 'client_enabled'. It also has some dependencies on newer stdlib functions like 'difference'.

It supports the OS Families Ubuntu, Debian, Redhat, SUSE, Gentoo and Archlinux. It supports also Strict Variables, so if you pass all OS specific parameters correctly it should work on your preferred OS too. Feedback, bugreports, and feature requests are always welcome, visit https://github.com/derdanne/puppet-nfs or send me an email.

When you are using a puppet version 3.x like it is shipped with Redhat Satellite 6, please use a version 1.x.x from puppet forge or the branch puppet3 when cloning directly from Github. (Note: voxpupuli#49 (comment)). I'll recommend using puppet >= 4.6.1, puppet versions up until 4.6.0 had various issues.

If you want to contribute, please do a fork on github, create a branch "feature name" with your features and do a pull request.

Warning: I've introduced new dependencies with version 2.1.0 which were needed to fix buggy rpcbind-socket restarting with systemd:

• puppetlabs/transition
• herculesteam/augeasproviders_core
• herculesteam/augeasproviders_shellvar

Setup

What derdanne-nfs affects

This module can be used to configure your nfs client and/or server, it could export nfs mount resources via storeconfigs or simply mount nfs shares on a client. You can also easily use the create_resources function when you store your exports i.e. via hiera.

Setup requirements

This Module depends on puppetlabs-stdlib >= 4.5.0 and puppetlabs-concat >= 1.1.2, you need to have these modules installed to use derdanne-nfs module.

Beginning with derdanne-nfs

On a nfs server the following code is sufficient to get all packages installed and services running to use nfs:

  node server {
    class { '::nfs':
      server_enabled => true,
    }
  }

On a client the following code is sufficient:

  node server {
    class { '::nfs':
      client_enabled => true,
    }
  }

Usage

Simple NFSv3 server and client example

This will export /data_folder on the server and automagically mount it on client.

  node server {
    class { '::nfs':
      server_enabled => true
    }
    nfs::server::export{ '/data_folder':
      ensure  => 'mounted',
      clients => '10.0.0.0/24(rw,insecure,async,no_root_squash) localhost(rw)'
    }
  }

  # By default, mounts are mounted in the same folder on the clients as
  # they were exported from on the server
  node client {
    class { '::nfs':
      client_enabled => true,
    }
    Nfs::Client::Mount <<| |>>
  }

Simple NFSv4 client example

This will mount /data on client in /share/data.

  node client {
    class { '::nfs':
      server_enabled => false,
      client_enabled => true,
      nfs_v4_client => true,
      nfs_v4_idmap_domain => $::domain,
    }
  
    nfs::client::mount { '/share/data':
        server => '192.168.0.1',
        share => 'data',
    }
  }

NFSv3 multiple exports, servers and multiple node example

  node server1 {
    class { '::nfs':
      server_enabled => true,
    }
    nfs::server::export { '/data_folder':
      ensure  => 'mounted',
      clients => '10.0.0.0/24(rw,insecure,async,no_root_squash) localhost(rw)',
    }
    nfs::server::export { '/homeexport':
      ensure  => 'mounted',
      clients => '10.0.0.0/24(rw,insecure,async,root_squash)',
      mount   => '/srv/home',
    }
  }

  node server2 {
    class { '::nfs':
      server_enabled => true,
    }
    # ensure is passed to mount, which will make the client not mount it
    # the directory automatically, just add it to fstab
    nfs::server::export { '/media_library':
      ensure  => 'present',
      nfstag     => 'media',
      clients => '10.0.0.0/24(rw,insecure,async,no_root_squash) localhost(rw)',
    }
  }

  node client {
    class { '::nfs':
      client_enabled => true,
    }
    Nfs::Client::Mount <<| |>>
  }

  # Using a storeconfig override, to change ensure option, so we mount
  # all shares
  node greedy_client {
    class { '::nfs':
      client_enabled => true,
    }
    Nfs::Client::Mount <<| |>> {
      ensure => 'mounted',
    }
  }


  # only the mount tagged as media
  # also override mount point
  node media_client {
    class { '::nfs':
      client_enabled => true,
    }
    Nfs::Client::Mount <<| nfstag == 'media' |>> {
      ensure => 'mounted',
      mount  => '/import/media',
    }
  }

  # All @@nfs::server::mount storeconfigs can be filtered by parameters
  # Also all parameters can be overridden (not that it's smart to do
  # so).
  # Check out the doc on exported resources for more info:
  # http://docs.puppetlabs.com/guides/exported_resources.html
  node single_server_client {
    class { '::nfs':
      client_enabled => true,
    }
    Nfs::Client::Mount <<| server == 'server1' |>> {
      ensure => 'absent',
    }
  }

NFSv4 Simple example

  # We use the $::domain fact for the Domain setting in
  # /etc/idmapd.conf.
  # For NFSv4 to work this has to be equal on servers and clients
  # set it manually if unsure.
  #
  # All nfsv4 exports are bind mounted into /export/$mount_name
  # and mounted on /srv/$mount_name on the client.
  # Both values can be overridden through parameters both globally

  # and on individual nodes.
  node server {
    file { ['/data_folder', '/homeexport']:
      ensure => 'directory',
    }
    class { '::nfs':
      server_enabled => true,
      nfs_v4 => true,
      nfs_v4_idmap_domain => 'example.com',
      nfs_v4_export_root  => '/export',
      nfs_v4_export_root_clients => '*(rw,fsid=0,insecure,no_subtree_check,async,no_root_squash)',
    }
    nfs::server::export { '/data_folder':
      ensure  => 'mounted',
      clients => '*(rw,insecure,async,no_root_squash,no_subtree_check)',
    }
    nfs::server::export { '/homeexport':
      ensure  => 'mounted',
      clients => '*(rw,insecure,async,root_squash,no_subtree_check)',
      mount   => '/srv/home',
    }
  }

  # By default, mounts are mounted in the same folder on the clients as
  # they were exported from on the server

  node client {
    class { '::nfs':
      client_enabled  => true,
      nfs_v4_client   => true,
    }
    Nfs::Client::Mount <<| |>>
  }

  # We can also mount the NFSv4 Root directly through nfs::client::mount::nfsv4::root.
  # By default /srv will be used for as mount point, but can be overriden through
  # the 'mounted' option.

  node client2 {
    $server = 'server'
    class { '::nfs':
      client_enabled => true,
      nfs_v4_client  => true,
    }
    Nfs::Client::Mount::Nfs_v4::Root <<| server == $server |>> {
      mount => "/srv/${server}",
    }
  }

NFSv4 insanely overcomplicated reference example

  # and on individual nodes.
  node server {
    class { '::nfs':
      server_enabled      => true,
      nfs_v4              => true,
      # Below are defaults
      nfs_v4_idmap_domain => $::domain,
      nfs_v4_export_root  => '/export',
      # Default access settings of /export root
      nfs_v4_export_root_clients =>
        "*.${::domain}(ro,fsid=root,insecure,no_subtree_check,async,root_squash)",


    }
    nfs::server::export { '/data_folder':
      # These are the defaults
      ensure  => 'mounted',
      # rbind or bind mounting of folders bindmounted into /export
      # google it
      bind    => 'rbind',
      # everything below here is propogated by to storeconfigs
      # to clients
      #
      # Directory where we want export mounted on client
      mount     => undef,
      remounts  => false,
      atboot    => false,
      #  Don't remove that option, but feel free to add more.
      options_nfs   => '_netdev',
      # If set will mount share inside /srv (or overridden mount_root)
      # and then bindmount to another directory elsewhere in the fs -
      # for fanatics.
      bindmount => undef,
      # Used to identify a catalog item for filtering by by
      # storeconfigs, kick ass.
      nfstag     => 'kick-ass',
      # copied directly into /etc/exports as a string, for simplicity
      clients => '10.0.0.0/24(rw,insecure,no_subtree_check,async,no_root_squash)',
    }
  }

  node client {
    class { '::nfs':
      client_enabled      => true,
      nfs_v4_client       => true,
      nfs_v4_idmap_domain => $::domain,
      nfs_v4_mount_root   => '/srv',
    }

    # We can as you by now know, override options set on the server
    # on the client node.
    # Be careful. Don't override mount points unless you are sure
    # that only one export will match your filter!

    Nfs::Client::Mount <<| nfstag == 'kick-ass' |>> {
      # Directory where we want export mounted on client
      mount       => undef,
      remounts    => false,
      atboot      => false,
      #  Don't remove that option, but feel free to add more.
      options_nfs => '_netdev',
      # If set will mount share inside /srv (or overridden mount_root)
      # and then bindmount to another directory elsewhere in the fs -
      # for fanatics.
      bindmount   => undef,
    }
  }

Simple create nfs export resources with hiera example

Hiera Server Role:

  classes:
    - nfs

  nfs::server_enabled: true
  nfs::client_enabled: false
  nfs::nfs_v4: true
  nfs::nfs_v4_idmap_domain: %{::domain}
  nfs::nfs_v4_export_root: '/share'
  nfs::nfs_v4_export_root_clients: '192.168.0.0/24(rw,fsid=root,insecure,no_subtree_check,async,no_root_squash)'


  nfs::nfs_exports_global:
    /var/www: {}
    /var/smb: {}

Hiera Client Role:

  classes:
    - nfs

  nfs::client_enabled: true
  nfs::nfs_v4_client: true
  nfs::nfs_v4_idmap_domain: %{::domain}
  nfs::nfs_v4_mount_root: '/share'
  nfs::nfs_server: 'nfs-server-fqdn'

Puppet:

  
  node server {
    hiera_include('classes')
    $nfs_exports_global = hiera_hash('nfs::nfs_exports_global', false)
  
    $defaults_nfs_exports = {
      ensure  => 'mounted',
      clients => '192.168.0.0/24(rw,insecure,no_subtree_check,async,no_root_squash)',
      nfstag     => $::fqdn,
    }
  
    if $nfs_exports_global {
      create_resources('::nfs::server::export', $nfs_exports_global, $defaults_nfs_exports)
    }
  }
  
  node client {
    hiera_include('classes')
    $nfs_server = hiera('nfs::nfs_server', false)
    
    if $nfs_server {
      Nfs::Client::Mount <<| nfstag == $nfs_server |>>
    }
  }

Reference

Classes

Public Classes

• nfs: Main class, includes all other classes

Public Defines

• nfs::client::mount: Handles all mounts on a nfs client.
• nfs::server::export: Handles all nfs exports on a nfs server.

Private Classes

• nfs::client: Includes all relevant classes for configuring as a client.

• nfs::client::config: Handles the configuration files.

• nfs::client::package: Handles the packages.

• nfs::client::service: Handles the services.

• nfs::server: Includes all relevant classes for configuring as a server.

• nfs::server::config: Handles the configuration files.

• nfs::server::package: Handles the packages.

• nfs::server::service: Handles the services.

• nfs::params: Includes all os specific parameters.

Private Defines

• nfs::bindmount: Creates the bindmounts of nfs 3 exports.
• nfs::nfsv4_bindmount: Creates the bindmounts of nfs 4 exports.
• nfs::create_export: Creates the nfs exports.
• nfs::mkdir: Creates directories recursive.

Parameters

Class: ::nfs

The following parameters are available in the ::nfs class:

ensure

String. Controls if the managed resources shall be present or absent. If set to absent:

• The managed software packages are being uninstalled.
• Any traces of the packages will be purged as good as possible. This may include existing configuration files. The exact behavior is provider dependent. Q.v.:
  • Puppet type reference: {package, "purgeable"}[http://j.mp/xbxmNP]
  • {Puppet's package provider source code}[http://j.mp/wtVCaL]
• System modifications (if any) will be reverted as good as possible (e.g. removal of created users, services, changed log settings, ...).
• This is thus destructive and should be used with care. Defaults to present.

server_enabled

Boolean. If set to true, this module will configure the node to act as a nfs server.

client_enabled

Boolean. If set to true, this module will configure the node to act as a nfs client, you can use the exported mount resources from configured servers.

storeconfigs_enabled

Boolean. If set to false, this module will not export any resources as storeconfigs. Defaults to true.

nfs_v4

Boolean. If set to true, this module will use nfs version 4 for exporting and mounting nfs resources. It defaults to true.

nfs_v4_client

Boolean. If set to true, this module will use nfs version 4 for mounting nfs resources. If set to false it will use nfs version 3 to mount nfs resources. It defaults to true.

exports_file

String. It defines the location of the file with the nfs export resources used by the nfs server.

idmapd_file

String. It defines the location of the file with the idmapd settings.

defaults_file

String. It defines the location of the file with the nfs settings.

manage_packages

Boolean. It defines if the packages should be managed through this module

server_packages

Array. It defines the packages needed to be installed for acting as a nfs server

server_package_ensure

String. It defines the packages state - any of present, installed, absent, purged, held, latest

client_packages

Array. It defines the packages needed to be installed for acting as a nfs client

client_package_ensure

String. It defines the packages state - any of present, installed, absent, purged, held, latest

manage_server_service

Boolean. Defines if module should manage server_service

manage_server_servicehelper

Boolean. Defines if module should manage server_servicehelper

manage_client_service

Boolean. Defines if module should manage client_service

server_service_name

String. It defines the servicename of the nfs server service

server_service_ensure

Boolean. It defines the service parameter ensure for nfs server services.

server_service_enable

Boolean. It defines the service parameter enable for nfs server service.

server_service_hasrestart

Boolean. It defines the service parameter hasrestart for nfs server service.

server_service_hasstatus

Boolean. It defines the service parameter hasstatus for nfs server service.

server_service_restart_cmd

String. It defines the service parameter restart for nfs server service.

server_nfsv4_servicehelper

Array. It defines the service helper like idmapd for servers configured with nfs version 4.

client_services

Nested Hash. It defines the servicenames need to be started when acting as a nfs client

client_nfsv4_services

Nested Hash. It defines the servicenames need to be started when acting as a nfs client version 4.

client_service_hasrestart

Boolean. It defines the service parameter hasrestart for nfs client services.

client_service_hasstatus

Boolean. It defines the service parameter hasstatus for nfs client services.

client_idmapd_setting

Array. It defines the Augeas parameter added in defaults_file when acting as a nfs version 4 client.

client_nfs_fstype

String. It defines the name of the nfs filesystem, when adding entries to /etc/fstab on a client node.

client_nfs_options

String. It defines the options for the nfs filesystem, when adding entries to /etc/fstab on a client node.

client_nfsv4_fstype

String. It defines the name of the nfs version 4 filesystem, when adding entries to /etc/fstab on a client node.

client_nfsv4_options

String. It defines the options for the nfs version 4filesystem, when adding entries to /etc/fstab on a client node.

nfs_v4_export_root

String. It defines the location where nfs version 4 exports should be bindmounted to on a server node. Defaults to /export.

nfs_v4_export_root_clients

String. It defines the clients that are allowed to mount nfs version 4 exports and includes the option string. Defaults to *.${::domain}(ro,fsid=root,insecure,no_subtree_check,async,root_squash).

nfs_v4_mount_root

String. It defines the location where nfs version 4 clients find the mount root on a server node. Defaults to /srv.

nfs_v4_idmap_domain

String. It defines the name of the idmapd domain setting in idmapd_file needed to be set to the same value on a server and client node to do correct uid and gid mapping. Defaults to $::domain.

nfsv4_bindmount_enable

Boolean. It defines if the module should create a bindmount for the export. Defaults to true.

client_need_gssd

Boolean. If true, sets NEED_GSSD=yes in /etc/defauls/nfs-common, usable on Debian/Ubuntu

client_gssd_service

Boolean. If true enable rpc-gssd service.

client_gssd_options

String. Options for rpc-gssd service. Defaults to ''

client_d9_gssdopt_workaround

Boolean. If enabled, workaround for passing gssd_options which is broken on Debian 9. Usable only on Debian 9

nfs_v4_idmap_localrealms

String or Array. 'Local-Realms' option for idmapd. Defaults to ''

nfs_v4_idmap_cache

Integer. 'Cache-Expiration' option for idmapd. Defaults to 0 - unused.

manage_nfs_v4_idmap_nobody_mapping

Boolean. Enable setting Nobody mapping in idmapd. Defaults to false.

nfs_v4_idmap_nobody_user

String. 'Nobody-User' option for idmapd. Defaults to nobody.

nfs_v4_idmap_nobody_group

String. 'Nobody-Group' option for idmapd. Defaults to nobody or nogroup.

client_rpcbind_config

String. It defines the location of the file with the rpcbind config.

client_rpcbind_optname

String. It defines the name of env variable that holds the rpcbind config. E.g. OPTIONS for Debian

client_rpcbind_opts

String. Options for rpcbind service.

Define: ::nfs::client::mount

The following parameters are available in the ::nfs::client::mount define:

server

String. Sets the ip address of the server with the nfs export

share

String. Sets the name of the nfs share on the server

ensure

String. Sets the ensure parameter of the mount.

remounts

String. Sets the remounts parameter of the mount.

atboot

String. Sets the atboot parameter of the mount.

options_nfsv4

String. Sets the mount options for a nfs version 4 mount.

options_nfs

String. Sets the mount options for a nfs mount.

bindmount

String. When not undef it will create a bindmount on the node for the nfs mount.

nfstag

String. Sets the nfstag parameter of the mount.

nfs_v4

Boolean. When set to true, it uses nfs version 4 to mount a share.

owner

String. Set owner of mount dir

group

String. Set group of mount dir

mode

String. Set mode of mount dir

mount_root

String. Overwrite mount root if differs from server config

Define: ::nfs::server::export

The following parameters are available in the ::nfs::server::export define:

clients

String. Sets the allowed clients and options for the export in the exports file. Defaults to localhost(ro)

bind

String. Sets the bind options setted in /etc/fstab for the bindmounts created. Defaults to rbind. When you have any submounts in your exported folders, the rbind option will submount them in the bindmount folder. You have to set the  crossmnt option in your nfs export to have the submounts from rbind available on your client. Your export should look like this:

node client {
  nfs::server::export { '/home':
    ensure  => 'mounted',
    clients => '*(rw,insecure,no_subtree_check,async,no_root_squash,crossmnt)',
  }
}

ensure

String. If enabled the mount will be created. Defaults to mounted

remounts

String. Sets the remounts parameter of the mount.

atboot

String. Sets the atboot parameter of the mount.

options_nfsv4

String. Sets the mount options for a nfs version 4 exported resource mount.

options_nfs

String. Sets the mount options for a nfs exported resource mount.

bindmount

String. When not undef it will create a bindmount on the node for the nfs mount.

nfstag

String. Sets the nfstag parameter of the mount.

mount

String. Sets the mountpoint the client will mount the exported resource mount on. If undef it defaults to the same path as on the server

owner

String. Sets the owner of the exported directory

group

String. Sets the group of the exported directory

mode

String. Sets the permissions of the exported directory.

Requirements

Modules needed:

puppetlabs/stdlib >= 4.5.0 puppetlabs/concat >= 1.1.2

Software versions needed:

facter > 1.6.2 puppet > 3.2.0

Ruby Gems needed:

augeas

Limitations

If you want to have specific package versions installed you may manage the needed packages outside of this module (use manage_packages => false). It is only tested to use 'present', 'installed', 'absent', 'purged', 'held' and 'latest' as argument for the parameters server_package_ensure and client_package_ensure.

Development

Derdanne modules are open projects. So if you want to make this module even better, you can contribute to this module on Github.

Before pushing PRs to Github i would recommend you to test your work locally. So you can ensure all test builds on Travis CI were passing. I have prepared an easy way to test your code locally with the help of Docker.

For running the complete static code analysis, it is sufficient to run a make test-all.

Default settings

I have set some defaults which you can change by setting the following environment variables.

PUPPET_VERSION

Changes the puppet version which will be used for the tests. Defaults to 6.0.

STRICT_VARIABLES

Sets strict variables on or off. Defaults to yes.

RVM

Sets the ruby version which will be used for the tests. Defaults to 2.4.1.

BEAKER_set

Sets the beaker docker target host. Defaults to ubuntu-20.04.

PUPPET_collection

Sets the puppet version for acceptance tests. Defaults to puppet6.

Running tests

You can run the following commands to setup and run the testsuite on your local machine.

make build

Build a docker image with a Ruby version which is not available on Docker hub. Check out https://hub.docker.com/r/derdanne/rvm/ to see if i have already prepared a rvm build for the ruby version you want to test. Take a look at the Dockerfile located in spec/local-testing if you want to customize your builds.

make pull

Pull a prebuild rvm docker image with the Ruby version defined in the variable RVM.

make install-gems

Install all needed gems locally to vendor/bundle.

make test-metadata-lint

Run linting of metadata.

make test-lint

Run puppet lint tests.

make test-syntax

Run syntax tests.

make test-rspec

Run rspec puppet tests.

make test-rubocop

Run rubocop tests.

make test-all

Run the whole testsuite.

make test-beaker

Run puppetlabs beaker rspec tests.

Disclaimer

This module based on Harald Skoglund haraldsk@redpill-linpro.com from https://github.com/haraldsk/puppet-module-nfs/ but has been fundementally refactored