openstack/puppet-nova
Code Issues Proposed changes

Expose 'mem_stats_period_seconds' config parameter

Browse Source 
Add support for configuring 'mem_stats_period_seconds'
libvirt config option.

When using the balloon stats in the XML configuration, user gets
latency violation in guests, because balloon stats causes QEMU to
periodically send asynchronous requests to balloon driver in the guest.

Change-Id: If69d32fb4b718b97efbfbe0d58a37966af957be9
This commit is contained in:
Rajesh Tailor 2019-05-16 15:20:32 +05:30
parent 3e7cd134f8
commit 05d7733e2a
3 changed files with 38 additions and 20 deletions
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43
manifests/compute/libvirt.pp
View File

@ -169,6 +169,11 @@
# for hotplug use.
# Defaults to $::os_service_default
#
# [*mem_stats_period_seconds*]
# (optional) A number of seconds to memory usage statistics period,
# zero or negative value mean to disable memory usage statistics.
# Defaults to $::os_service_default
#
class nova::compute::libvirt (
$ensure_package = 'present',
$libvirt_virt_type = 'kvm',
@ -201,6 +206,7 @@ class nova::compute::libvirt (
$volume_use_multipath = $::os_service_default,
$nfs_mount_options = $::os_service_default,
$num_pcie_ports = $::os_service_default,
$mem_stats_period_seconds = $::os_service_default,
) inherits nova::params {
include ::nova::deps
@ -268,24 +274,25 @@ class nova::compute::libvirt (
}
nova_config {
'DEFAULT/compute_driver': value => $compute_driver;
'DEFAULT/preallocate_images': value => $preallocate_images;
'vnc/vncserver_listen': value => $vncserver_listen;
'libvirt/virt_type': value => $libvirt_virt_type;
'libvirt/cpu_mode': value => $libvirt_cpu_mode_real;
'libvirt/snapshot_image_format': value => $libvirt_snapshot_image_format;
'libvirt/inject_password': value => $libvirt_inject_password;
'libvirt/inject_key': value => $libvirt_inject_key;
'libvirt/inject_partition': value => $libvirt_inject_partition;
'libvirt/hw_disk_discard': value => $libvirt_hw_disk_discard;
'libvirt/hw_machine_type': value => $libvirt_hw_machine_type;
'libvirt/enabled_perf_events': value => join(any2array($libvirt_enabled_perf_events), ',');
'libvirt/rx_queue_size': value => $rx_queue_size;
'libvirt/tx_queue_size': value => $tx_queue_size;
'libvirt/file_backed_memory': value => $file_backed_memory;
'libvirt/volume_use_multipath': value => $volume_use_multipath;
'libvirt/nfs_mount_options': value => $nfs_mount_options;
'libvirt/num_pcie_ports': value => $num_pcie_ports;
'DEFAULT/compute_driver': value => $compute_driver;
'DEFAULT/preallocate_images': value => $preallocate_images;
'vnc/vncserver_listen': value => $vncserver_listen;
'libvirt/virt_type': value => $libvirt_virt_type;
'libvirt/cpu_mode': value => $libvirt_cpu_mode_real;
'libvirt/snapshot_image_format': value => $libvirt_snapshot_image_format;
'libvirt/inject_password': value => $libvirt_inject_password;
'libvirt/inject_key': value => $libvirt_inject_key;
'libvirt/inject_partition': value => $libvirt_inject_partition;
'libvirt/hw_disk_discard': value => $libvirt_hw_disk_discard;
'libvirt/hw_machine_type': value => $libvirt_hw_machine_type;
'libvirt/enabled_perf_events': value => join(any2array($libvirt_enabled_perf_events), ',');
'libvirt/rx_queue_size': value => $rx_queue_size;
'libvirt/tx_queue_size': value => $tx_queue_size;
'libvirt/file_backed_memory': value => $file_backed_memory;
'libvirt/volume_use_multipath': value => $volume_use_multipath;
'libvirt/nfs_mount_options': value => $nfs_mount_options;
'libvirt/num_pcie_ports': value => $num_pcie_ports;
'libvirt/mem_stats_period_seconds': value => $mem_stats_period_seconds;
}
# cpu_model param is only valid if cpu_mode=custom

6
releasenotes/notes/nova_libvirt_mem_stats_period_seconds-679de08855e07254.yaml Normal file
View File

@ -0,0 +1,6 @@
---
features:
- |
Add parameter `mem_stats_period_seconds` to specify number
of seconds to memory usage statistics period, zero or negative
value mean to disable memory usage statistics.

9
spec/classes/nova_compute_libvirt_spec.rb
View File

@ -67,6 +67,7 @@ describe 'nova::compute::libvirt' do
it { is_expected.to contain_nova_config('libvirt/volume_use_multipath').with_value('<SERVICE DEFAULT>')}
it { is_expected.to contain_nova_config('libvirt/nfs_mount_options').with_ensure('<SERVICE DEFAULT>')}
it { is_expected.to contain_nova_config('libvirt/num_pcie_ports').with_ensure('<SERVICE DEFAULT>')}
it { is_expected.to contain_nova_config('libvirt/mem_stats_period_seconds').with_value('<SERVICE DEFAULT>')}
end
describe 'with params' do
@ -95,7 +96,8 @@ describe 'nova::compute::libvirt' do
:tx_queue_size => 1024,
:volume_use_multipath => false,
:nfs_mount_options => 'rw,intr,nolock',
:num_pcie_ports => 16
:num_pcie_ports => 16,
:mem_stats_period_seconds => 20,
}
end
@ -124,6 +126,7 @@ describe 'nova::compute::libvirt' do
it { is_expected.to contain_nova_config('libvirt/volume_use_multipath').with_value(false)}
it { is_expected.to contain_nova_config('libvirt/nfs_mount_options').with_value('rw,intr,nolock')}
it { is_expected.to contain_nova_config('libvirt/num_pcie_ports').with_value(16)}
it { is_expected.to contain_nova_config('libvirt/mem_stats_period_seconds').with_value(20)}
it {
is_expected.to contain_service('libvirt').with(
:name => 'custom_service',
@ -303,7 +306,8 @@ describe 'nova::compute::libvirt' do
:remove_unused_resized_minimum_age_seconds => 3600,
:remove_unused_original_minimum_age_seconds => 3600,
:libvirt_enabled_perf_events => ['cmt', 'mbml', 'mbmt'],
:nfs_mount_options => 'rw,intr,nolock'
:nfs_mount_options => 'rw,intr,nolock',
:mem_stats_period_seconds => 20,
}
end
@ -314,6 +318,7 @@ describe 'nova::compute::libvirt' do
it { is_expected.to contain_nova_config('libvirt/remove_unused_resized_minimum_age_seconds').with_value(3600)}
it { is_expected.to contain_nova_config('libvirt/enabled_perf_events').with_value('cmt,mbml,mbmt')}
it { is_expected.to contain_nova_config('libvirt/nfs_mount_options').with_value('rw,intr,nolock')}
it { is_expected.to contain_nova_config('libvirt/mem_stats_period_seconds').with_value(20)}
it { is_expected.to contain_package('libvirt').with(
:name => 'libvirt-daemon-kvm',
:ensure => 'present'