Add new role parameter NovaLibvirtMemStatsPeriodSeconds

Add role parameter NovaLibvirtMemStatsPeriodSeconds which allows to
set `libvirt/mem_stats_period_seconds` parameter value to
number of seconds to memory usage statistics period, where
zero or negative value mean to disable memory usage statistics.

Default value for the parameter is 10.
Also set the default value to 0 for Real-Time Compute roles.

Depends-On: https://review.opendev.org/#/c/671232/
Change-Id: I8e1a81bc69b4d266755ba3c2a4bf17f37d276fd7
(cherry picked from commit 66c4e23654)

deployment/nova/nova-compute-container-puppet.yaml

@@ -292,6 +292,14 @@ parameters:
     type: number
     tags:
       - role_specific
+  NovaLibvirtMemStatsPeriodSeconds:
+    description: >
+      A number of seconds to memory usage statistics period, zero or negative
+      value mean to disable memory usage statistics.
+    default: 10
+    type: number
+    tags:
+      - role_specific
   NeutronMechanismDrivers:
     default: 'ovn'
     description: |
@@ -364,6 +372,7 @@ resources:
               nfs_options: NovaNfsOptions
               nfs_vers: NovaNfsVersion
               nova::compute::libvirt::num_pcie_ports: NovaLibvirtNumPciePorts
+              nova::compute::libvirt::mem_stats_period_seconds: NovaLibvirtMemStatsPeriodSeconds
             - values: {get_param: [RoleParameters]}
           - values:
               NovaVcpuPinSet: {get_param: NovaVcpuPinSet}
@@ -384,6 +393,7 @@ resources:
               NovaNfsOptions: {get_param: NovaNfsOptions}
               NovaNfsVersion: {get_param: NovaNfsVersion}
               NovaLibvirtNumPciePorts: {get_param: NovaLibvirtNumPciePorts}
+              NovaLibvirtMemStatsPeriodSeconds: {get_param: NovaLibvirtMemStatsPeriodSeconds}
 
 conditions:
   enable_instance_ha: {equals: [{get_param: EnableInstanceHA}, true]}

releasenotes/notes/nova_libvirt_mem_stats_period_seconds-b9b606232629cb38.yaml

@@ -0,0 +1,8 @@
+---
+features:
+  - |
+    Add parameter NovaLibvirtMemStatsPeriodSeconds, which allows to
+    set `libvirt/mem_stats_period_seconds` parameter value to number
+    of seconds to memory usage statistics period, zero or negative
+    value mean to disable memory usage statistics.
+    Default value for NovaLibvirtMemStatsPeriodSeconds is 10.

roles/ComputeOvsDpdkRT.yaml

@@ -18,6 +18,7 @@
     TunedProfileName: "realtime-virtual-host"
     NovaLibvirtRxQueueSize: 1024
     NovaLibvirtTxQueueSize: 1024
+    NovaLibvirtMemStatsPeriodSeconds: 0
   update_serial: 25
   ServicesDefault:
     - OS::TripleO::Services::Aide

roles/ComputeOvsDpdkSriovRT.yaml

@@ -15,6 +15,7 @@
     TunedProfileName: "realtime-virtual-host"
     NovaLibvirtRxQueueSize: 1024
     NovaLibvirtTxQueueSize: 1024
+    NovaLibvirtMemStatsPeriodSeconds: 0
   update_serial: 25
   ServicesDefault:
     - OS::TripleO::Services::Aide

roles/ComputeRealTime.yaml

@@ -22,6 +22,7 @@
     KernelArgs: ""      # these must be set in an environment file or similar
     IsolCpusList: ""    # according to the hardware of real-time nodes
     NovaVcpuPinSet: ""  #
+    NovaLibvirtMemStatsPeriodSeconds: 0
   update_serial: 25
   ServicesDefault:
     - OS::TripleO::Services::Aide

roles/ComputeSriovRT.yaml

@@ -15,6 +15,7 @@
   ImageDefault: overcloud-realtime-compute
   RoleParametersDefault:
     TunedProfileName: "realtime-virtual-host"
+    NovaLibvirtMemStatsPeriodSeconds: 0
   update_serial: 25
   ServicesDefault:
     - OS::TripleO::Services::Aide