irqbalance

Table of Contents

1. Overview
2. Usage
3. Limitations
4. Development

Overview

This module installs and manages the irqbalance daemon. It will accept any option or environment variable that irqbalance supports and will simply ignore anything not supported by the default irqbalance version that comes with the distribution.

Unmanaged service states

This module will not manage the running state of the irqbalance service when applied to a single processor system, or when oneshot is set to yes. In these scenarios the service_ensure parameter is simply ignored.

Init scripts

The Upstart init script that was included with Ubuntu Trusty Tahr (14.04) does not seem to support the full set of options that the installed irqbalance version itself supports.

If manage_init_script_file is set to true, this module will generally provide a sensible init script replacement for Ubuntu distributions. Additionally, if you wish to provide your own init script you can do so by passing the appropriate parameter: eg. upstart_init_script_file_source or systemd_init_script_file_template.

This module will default to using the following init types to manage the service:

• CentOS/RHEL5 will use SysV init scripts.
• CentOS/RHEL6 will use SysV init scripts.
• CentOS/RHEL7 will use systemd.
• Fedora will use systemd.
• Debian 6 will use SysV init scripts.
• Debian 7 will use SysV init scripts.
• Ubuntu 10.04 will use Upstart.
• Ubuntu 12.04 will use Upstart.
• Ubuntu 14.04 will use Upstart.
• SLES 11 SP1 will use SysV init scripts.
• Gentoo will use OpenRC.

Debian 7 and Ubuntu 14.04 support systemd as a non-default init but note that neither come with an irqbalance service unit file. Examples of managing irqbalance under systemd on Debian/Ubuntu are shown below.

Usage

Install and run the irqbalance service using the distribution defaults:

include  '::irqbalance'

Set the powerthresh option to 2 if the irqbalance version included with this distribution supports it:

class { '::irqbalance':
  powerthresh => '2',
}

Set all of the irqbalance options at once: (These won't be checked to see if the installed irqbalance version supports them)

class { '::irqbalance':
  args => '--powerthresh=2 --deepestcache=2',
}

Set the ONESHOT environment variable:

class { '::irqbalance':
  oneshot => 'yes',
}

Use your own irqbalance configuration file:

class { '::irqbalance':
  config_file_source => '/path/to/config',
}

Manage irqbalance on Debian 7 under systemd (untested):

class { '::irqbalance':
  $manage_init_script_file => true,
  $service_provider = 'systemd'
  $systemd_init_script_file_template = 'irqbalance/init/systemd/without-foreground-irqbalance.service.erb'
}

Manage irqbalance on Ubuntu 14.04 under systemd (untested):

class { '::irqbalance':
  $manage_init_script_file => true,
  $service_provider = 'systemd'
  $systemd_init_script_file_template = 'irqbalance/init/systemd/with-foreground-irqbalance.service.erb'
}

Parameters

Environment variables for the configuration file:

affinity_mask

Must be an array. eg. affinity_mask => ['ff000000', '0000000'],

banned_cpus

Must be an array. eg. banned_cpus => ['fc3', '0000001'],

banned_interrupts

Must be an array. eg. banned_interrupts => ['01', '03'],

oneshot

Can be set to 'yes', but accepts most boolean forms as a string. If set, the service_ensure parameter will be ignored. eg. oneshot => 'yes',

Options passed to the service:

banirq

Must be an array. eg. banirq => ['01', '03', '04'],

banscript

eg. banscript => '/path/to/banscript.sh',

debug

Must be set to true or false. Mostly ignored unless the irqbalance version also supports the foreground option. eg. debug => true,

deepestcache

eg. deepestcache => '2',

hintpolicy

eg. hintpolicy => 'exact',

pid

Generally ignored when using SysV init scripts, as they use their own path.

eg. pid => '/path/to/irqbalance.pid',

policyscript

eg. policyscript => '/path/to/policyscript.sh',

powerthresh

eg. powerthresh => '2',

Other parameters:

args

Options that will passed to irqbalance, in the same way that one would do it from the command line. eg. args => '--powerthresh=2 --deepestcache=2',

config_file_group

Group for the irqbalance configuration file. Defaults to '0'.

config_file_mode

Mode for the irqbalance configuration file. Defaults to '0644'.

config_file_name

The filename that the irqbalance configuration is written into.

config_file_owner

Owner for the irqbalance configuration file. Defaults to '0'.

config_file_source

Used for providing your own irqbalance configuration file. Needs to follow the same requirements as the Puppet File source attribute. eg. config_file_source => 'puppet:///modules/irqbalance/config/irq.conf', If this parameter is provided, you should also set the oneshot parameter to 'yes' if the file contains ONESHOT=yes, since this module does not know about the contents and uses oneshot to decide how to manage the service. See the service_ensure parameter.

config_file_template

Determines which template Puppet should use for the irqbalance configuration.

dependency_class

Determines whether to include a dependency class for this irqbalance module. eg. dependency_class => 'irqbalance_deps',

manage_init_script_file

Determines whether to manage init scripts. Defaults to false. It is recommended that this be set to true to ensure that you can use most available options that irqbalance supports. This will also need to be set to true if the distribution does not provide one for systemd. For example, Debian Wheezy.

manage_systemd_dir_path

Determines whether to manage the systemd unit file directory. Defaults to true. In the next release this directory will be unmanaged by this module and this parameter will be removed.

package_ensure

Sets the irqbalance package to be installed. Can be set to present, 'latest', or a specific version.

package_manage

Determines whether to manage the irqbalance package. Defaults to true.

prefer_systemd

Determines whether to use systemd init scripts on certain Debian or Ubuntu distributions.

service_enable

Determines if the service should be enabled at boot.

service_ensure

Determines if the service should be running or not. This parameter is ignored if running on a single processor system, or if oneshot is set to 'yes'.

service_manage

Selects whether Puppet should manage the service. eg. service_manage => false

systemd_init_script_file_group

Group for the systemd init service file. Defaults to '0'.

systemd_init_script_file_mode

Mode for the systemd init service file. Defaults to '0644'.

systemd_init_script_file_owner

Owner for the systemd init service file. Defaults to '0'.

systemd_init_script_file_source

Used for providing your own irqbalance systemd service file for systems using systemd.

systemd_init_script_file_template

Determines which systemd service template Puppet should use for systems using systemd.

sysv_init_script_file_group

Group for SysV-like init scripts. Defaults to '0'.

sysv_init_script_file_mode

Mode for SysV-like init scripts. Defaults to '0755'.

sysv_init_script_file_owner

Owner for SysV-like init scripts. Defaults to '0'.

sysv_init_script_file_source

Used for providing your own irqbalance init script for systems using SysV-like init.

sysv_init_script_file_template

Determines which init script template Puppet should use for systems using SysV-like init.

upstart_file_group

Group for Upstart init scripts. Defaults to '0'.

upstart_init_script_file_mode

Mode for Upstart init scripts. Defaults to '0644'.

upstart_init_script_file_owner

Owner for Upstart init scripts. Defaults to '0'.

upstart_init_script_file_source

Used for providing your own irqbalance init script for systems using Upstart.

upstart_init_script_file_template

Determines which init script template Puppet should use for systems using Upstart.

Limitations

This module has received very limited testing on:

• CentOS/RHEL 5/6/7
• Debian 6/7
• Fedora 20
• SLES 11 SP1
• Ubuntu 10.04/12.04/14.04

against Puppet 3.8.7 and Puppet 4.x

Development

Patches are welcome.