Add new role parameters for cpu/ram/disk allocation ratio

This change adds three new role parameters `NovaCPUAllocationRatio`,
`NovaRAMAllocationRatio` and `NovaDiskAllocationRatio` for
configuring cpu_allocation_ratio, ram_allocation_ratio and
disk_allocation_ratio.
The default values for CPU and Disk allocation ratio are taken
as 0.0 as it will be updated by update_available_resource method
as mentioned in [1].
[1] https://specs.openstack.org/openstack/nova-specs/specs/stein/implemented/initial-allocation-ratios.html

Change-Id: Ia3c62668b0c1469e31aa8cd2c984b460eb06d970

deployment/nova/nova-base-puppet.yaml

@@ -351,7 +351,6 @@ outputs:
           nova::cron::purge_shadow_tables::verbose: {get_param: NovaCronPurgeShadowTablesVerbose}
           nova::cron::purge_shadow_tables::all_cells: {get_param: NovaCronPurgeShadowTablesAllCells}
           nova::compute::sync_power_state_interval: {get_param: NovaSyncPowerStateInterval}
-          nova::ram_allocation_ratio: '1.0'
           nova_is_additional_cell: {get_param: NovaAdditionalCell}
         - get_attr: [RoleParametersValue, value]
         -

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

@@ -323,6 +323,24 @@ parameters:
     description: The password for the nova service and db account
     type: string
     hidden: true
+  NovaCPUAllocationRatio:
+    type: number
+    description: Virtual CPU to physical CPU allocation ratio.
+    default: 0.0
+    tags:
+      - role_specific
+  NovaRAMAllocationRatio:
+    type: number
+    description: Virtual RAM to physical RAM allocation ratio.
+    default: 1.0
+    tags:
+      - role_specific
+  NovaDiskAllocationRatio:
+    type: number
+    description: Virtual disk to physical disk allocation ratio.
+    default: 0.0
+    tags:
+      - role_specific
 
 resources:
 
@@ -389,6 +407,9 @@ resources:
               nova::compute::libvirt::mem_stats_period_seconds: NovaLibvirtMemStatsPeriodSeconds
               nova::compute::rbd::ephemeral_storage: NovaEnableRbdBackend
               resume_guests_state_on_host_boot: NovaResumeGuestsStateOnHostBoot
+              nova::cpu_allocation_ratio: NovaCPUAllocationRatio
+              nova::ram_allocation_ratio: NovaRAMAllocationRatio
+              nova::disk_allocation_ratio: NovaDiskAllocationRatio
             - values: {get_param: [RoleParameters]}
           - values:
               NovaVcpuPinSet: {get_param: NovaVcpuPinSet}
@@ -411,6 +432,9 @@ resources:
               NovaLibvirtNumPciePorts: {get_param: NovaLibvirtNumPciePorts}
               NovaLibvirtMemStatsPeriodSeconds: {get_param: NovaLibvirtMemStatsPeriodSeconds}
               NovaEnableRbdBackend: {get_param: NovaEnableRbdBackend}
+              NovaCPUAllocationRatio: {get_param: NovaCPUAllocationRatio}
+              NovaRAMAllocationRatio: {get_param: NovaRAMAllocationRatio}
+              NovaDiskAllocationRatio: {get_param: NovaDiskAllocationRatio}
 
 conditions:
   enable_instance_ha: {equals: [{get_param: EnableInstanceHA}, true]}
@@ -546,7 +570,7 @@ outputs:
               if:
               - libvirt_file_backed_memory_enabled
               - '1.0'
-              - null
+              - {get_attr: [RoleParametersValue, value, 'nova::ram_allocation_ratio']}
       service_config_settings:
         fluentd:
           tripleo_fluentd_groups_nova_compute:

releasenotes/notes/allocation_ratio-4a8ecf4cdf5fb7e2.yaml

@@ -0,0 +1,13 @@
+---
+features:
+  - |
+    Add new role parameters `NovaCPUAllocationRatio`, `NovaRAMAllocationRatio`
+    and `NovaDiskAllocationRatio` which allows to configure `cpu_allocation_ratio`,
+    `ram_allocation_ratio` and `disk_allocation_ratio`.
+    Default value for NovaCPUAllocationRatio is 0.0
+    Default value for NovaRAMAllocationRatio is 1.0
+    Default value for NovaDiskAllocationRatio is 0.0
+
+    The default values for CPU and Disk allocation ratio
+    are taken 0.0 as mentioned in [1].
+    [1] https://specs.openstack.org/openstack/nova-specs/specs/stein/implemented/initial-allocation-ratios.html