abe5075878
Image preallocation allows storage to be fully allocated at instance start. This should significantly improve performance on writes to new blocks and may even improve I/O performance to prewritten blocks due to reduced fragmentation. Change-Id: I1be99c9af8f32b1a7f8408ddeb695fd05a603ace
263 lines
9.0 KiB
Puppet
263 lines
9.0 KiB
Puppet
# == Class: nova::compute::libvirt
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#
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# Install and manage nova-compute guests managed
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# by libvirt
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#
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# === Parameters:
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#
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# [*ensure_package*]
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# (optional) The state of nova packages
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# Defaults to 'present'
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#
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# [*libvirt_virt_type*]
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# (optional) Libvirt domain type. Options are: kvm, lxc, qemu, uml, xen
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# Defaults to 'kvm'
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#
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# [*vncserver_listen*]
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# (optional) IP address on which instance vncservers should listen
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# Defaults to '127.0.0.1'
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#
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# [*migration_support*]
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# (optional) Whether to support virtual machine migration
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# Defaults to false
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#
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# [*libvirt_cpu_mode*]
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# (optional) The libvirt CPU mode to configure. Possible values
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# include custom, host-model, none, host-passthrough.
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# Defaults to 'host-model' if libvirt_virt_type is set to kvm,
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# otherwise defaults to 'none'.
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#
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# [*libvirt_cpu_model*]
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# (optional) The named libvirt CPU model (see names listed in
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# /usr/share/libvirt/cpu_map.xml). Only has effect if
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# cpu_mode="custom" and virt_type="kvm|qemu".
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# Defaults to undef
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#
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# [*libvirt_disk_cachemodes*]
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# (optional) A list of cachemodes for different disk types, e.g.
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# ["file=directsync", "block=none"]
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# If an empty list is specified, the disk_cachemodes directive
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# will be removed from nova.conf completely.
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# Defaults to an empty list
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#
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# [*libvirt_hw_disk_discard*]
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# (optional) Discard option for nova managed disks. Need Libvirt(1.0.6)
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# Qemu1.5 (raw format) Qemu1.6(qcow2 format).
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# Defaults to $::os_service_default
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#
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# [*libvirt_hw_machine_type*]
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# (optional) Option to specify a default machine type per host architecture.
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# Defaults to $::os_service_default
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#
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# [*libvirt_inject_password*]
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# (optional) Inject the admin password at boot time, without an agent.
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# Defaults to false
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#
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# [*libvirt_inject_key*]
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# (optional) Inject the ssh public key at boot time.
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# Defaults to false
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#
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# [*libvirt_inject_partition*]
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# (optional) The partition to inject to : -2 => disable, -1 => inspect
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# (libguestfs only), 0 => not partitioned, >0 => partition
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# number (integer value)
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# Defaults to -2
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#
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# [*remove_unused_base_images*]
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# (optional) Should unused base images be removed?
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# If undef is specified, remove the line in nova.conf
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# otherwise, use a boolean to remove or not the base images.
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# Defaults to undef
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#
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# [*remove_unused_resized_minimum_age_seconds*]
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# (optional) Unused resized base images younger
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# than this will not be removed
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# If undef is specified, remove the line in nova.conf
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# otherwise, use a integer or a string to define after
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# how many seconds it will be removed.
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# Defaults to undef
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#
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# [*remove_unused_original_minimum_age_seconds*]
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# (optional) Unused unresized base images younger
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# than this will not be removed
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# If undef is specified, remove the line in nova.conf
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# otherwise, use a integer or a string to define after
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# how many seconds it will be removed.
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# Defaults to undef
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#
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# [*libvirt_service_name*]
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# (optional) libvirt service name.
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# Defaults to $::nova::params::libvirt_service_name
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#
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# [*virtlock_service_name*]
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# (optional) virtlock service name.
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# Defaults to $::nova::params::virtlock_service_name
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#
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# [*virtlog_service_name*]
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# (optional) virtlog service name.
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# Defaults to $::nova::params::virtlog_service_name
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#
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# [*compute_driver*]
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# (optional) Compute driver.
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# Defaults to 'libvirt.LibvirtDriver'
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#
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# [*preallocate_images*]
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# (optional) The image preallocation mode to use.
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# Valid values are 'none' or 'space'.
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# Defaults to $::os_service_default
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#
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# [*manage_libvirt_services*]
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# (optional) Whether or not deploy Libvirt services.
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# In the case of micro-services, set it to False and use
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# nova::compute::libvirt::services + hiera to select what
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# you actually want to deploy.
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# Defaults to true for backward compatibility.
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#
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class nova::compute::libvirt (
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$ensure_package = 'present',
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$libvirt_virt_type = 'kvm',
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$vncserver_listen = '127.0.0.1',
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$migration_support = false,
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$libvirt_cpu_mode = false,
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$libvirt_cpu_model = undef,
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$libvirt_disk_cachemodes = [],
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$libvirt_hw_disk_discard = $::os_service_default,
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$libvirt_hw_machine_type = $::os_service_default,
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$libvirt_inject_password = false,
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$libvirt_inject_key = false,
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$libvirt_inject_partition = -2,
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$remove_unused_base_images = undef,
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$remove_unused_resized_minimum_age_seconds = undef,
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$remove_unused_original_minimum_age_seconds = undef,
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$libvirt_service_name = $::nova::params::libvirt_service_name,
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$virtlock_service_name = $::nova::params::virtlock_service_name,
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$virtlog_service_name = $::nova::params::virtlog_service_name,
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$compute_driver = 'libvirt.LibvirtDriver',
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$preallocate_images = $::os_service_default,
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$manage_libvirt_services = true,
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) inherits nova::params {
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include ::nova::deps
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include ::nova::params
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# libvirt_cpu_mode has different defaults depending on hypervisor.
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if !$libvirt_cpu_mode {
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case $libvirt_virt_type {
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'kvm': {
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$libvirt_cpu_mode_real = 'host-model'
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}
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default: {
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$libvirt_cpu_mode_real = 'none'
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}
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}
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} else {
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$libvirt_cpu_mode_real = $libvirt_cpu_mode
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}
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if($::osfamily == 'Debian') {
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package { "nova-compute-${libvirt_virt_type}":
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ensure => $ensure_package,
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tag => ['openstack', 'nova-package'],
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}
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}
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if $migration_support {
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if $vncserver_listen != '0.0.0.0' and $vncserver_listen != '::0' {
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fail('For migration support to work, you MUST set vncserver_listen to \'0.0.0.0\' or \'::0\'')
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} else {
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include ::nova::migration::libvirt
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}
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}
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# manage_libvirt_services is here for backward compatibility to support
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# deployments that do not include nova::compute::libvirt::services
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#
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# If you're using hiera:
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# - set nova::compute::libvirt::manage_libvirt_services to false
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# - include ::nova::compute::libvirt::services in your composition layer
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# - select which services you want to deploy with
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# ::nova::compute::libvirt::services:* parameters.
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#
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# If you're not using hiera:
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# - set nova::compute::libvirt::manage_libvirt_services to true (default).
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# - select which services you want to deploy with
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# ::nova::compute::libvirt::*_service_name parameters.
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if $manage_libvirt_services {
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class { '::nova::compute::libvirt::services':
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libvirt_service_name => $libvirt_service_name,
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virtlock_service_name => $virtlock_service_name,
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virtlog_service_name => $virtlog_service_name,
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libvirt_virt_type => $libvirt_virt_type,
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}
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}
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nova_config {
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'DEFAULT/compute_driver': value => $compute_driver;
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'DEFAULT/preallocate_images': value => $preallocate_images;
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'vnc/vncserver_listen': value => $vncserver_listen;
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'libvirt/virt_type': value => $libvirt_virt_type;
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'libvirt/cpu_mode': value => $libvirt_cpu_mode_real;
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'libvirt/inject_password': value => $libvirt_inject_password;
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'libvirt/inject_key': value => $libvirt_inject_key;
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'libvirt/inject_partition': value => $libvirt_inject_partition;
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'libvirt/hw_disk_discard': value => $libvirt_hw_disk_discard;
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'libvirt/hw_machine_type': value => $libvirt_hw_machine_type;
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}
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# cpu_model param is only valid if cpu_mode=custom
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# otherwise it should be commented out
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if $libvirt_cpu_mode_real == 'custom' {
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validate_string($libvirt_cpu_model)
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nova_config {
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'libvirt/cpu_model': value => $libvirt_cpu_model;
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}
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} else {
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nova_config {
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'libvirt/cpu_model': ensure => absent;
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}
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if $libvirt_cpu_model {
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warning('$libvirt_cpu_model requires that $libvirt_cpu_mode => "custom" and will be ignored')
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}
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}
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if size($libvirt_disk_cachemodes) > 0 {
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nova_config {
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'libvirt/disk_cachemodes': value => join($libvirt_disk_cachemodes, ',');
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}
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} else {
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nova_config {
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'libvirt/disk_cachemodes': ensure => absent;
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}
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}
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if $remove_unused_resized_minimum_age_seconds != undef {
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nova_config {
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'libvirt/remove_unused_resized_minimum_age_seconds': value => $remove_unused_resized_minimum_age_seconds;
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}
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} else {
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nova_config {
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'libvirt/remove_unused_resized_minimum_age_seconds': ensure => absent;
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}
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}
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if $remove_unused_base_images != undef {
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nova_config {
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'DEFAULT/remove_unused_base_images': value => $remove_unused_base_images;
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}
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} else {
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nova_config {
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'DEFAULT/remove_unused_base_images': ensure => absent;
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}
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}
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if $remove_unused_original_minimum_age_seconds != undef {
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nova_config {
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'DEFAULT/remove_unused_original_minimum_age_seconds': value => $remove_unused_original_minimum_age_seconds;
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}
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} else {
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nova_config {
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'DEFAULT/remove_unused_original_minimum_age_seconds': ensure => absent;
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}
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}
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}
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