openstack
/
puppet-nova
Code Issues Proposed changes

Expose 'mem_stats_period_seconds' config parameter 

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
(cherry picked from commit 05d7733e2a)
This commit is contained in:
Rajesh Tailor 2019-05-16 15:20:32 +05:30
parent e0cfbc5c11
commit 4c5881a746
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'