Fix default value of host_subset_size in nova-controller config.
The default value of host_subset_size has been set to 1.
'host_subset_size' is mostly for cases then multiple VMs booting simultaneously
to avoid race conditions. If no such cases batter to use default value - 1
Closes-bug: PROD-36098
Change-Id: Id05658a17ba1e206009b9cfe8227359febce4377
diff --git a/README.rst b/README.rst
index 7ea6da8..0943db2 100644
--- a/README.rst
+++ b/README.rst
@@ -298,6 +298,15 @@
# Add key without value to remove line from policy.json
'compute:create:attach_network':
+Configure host_subset_size
+--------------------------
+
+.. code-block:: yaml
+
+ nova:
+ controller:
+ host_subset_size: 1
+
Compute nodes
-------------
diff --git a/nova/files/newton/nova-controller.conf.Debian b/nova/files/newton/nova-controller.conf.Debian
index 0b037df..f95e6bf 100644
--- a/nova/files/newton/nova-controller.conf.Debian
+++ b/nova/files/newton/nova-controller.conf.Debian
@@ -56,7 +56,7 @@
enabled_apis = osapi_compute,metadata
image_service=nova.image.glance.GlanceImageService
until_refresh=0
-scheduler_host_subset_size=30
+scheduler_host_subset_size = {{ controller.get('host_subset_size', '1') }}
my_ip={{ controller.bind.private_address }}
fping_path=/usr/bin/fping
diff --git a/nova/files/newton/nova-controller.conf.RedHat b/nova/files/newton/nova-controller.conf.RedHat
index c3b92c3..d7ce085 100644
--- a/nova/files/newton/nova-controller.conf.RedHat
+++ b/nova/files/newton/nova-controller.conf.RedHat
@@ -45,7 +45,7 @@
enabled_apis = osapi_compute,metadata
image_service=nova.image.glance.GlanceImageService
until_refresh=0
-scheduler_host_subset_size=30
+scheduler_host_subset_size = {{ controller.get('host_subset_size', '1') }}
my_ip={{ controller.bind.private_address }}
fping_path=/usr/bin/fping
diff --git a/nova/files/pike/nova-controller.conf.Debian b/nova/files/pike/nova-controller.conf.Debian
index d2d7693..a95b8d2 100644
--- a/nova/files/pike/nova-controller.conf.Debian
+++ b/nova/files/pike/nova-controller.conf.Debian
@@ -4733,7 +4733,7 @@
# Minimum value: 1
# Deprecated group/name - [DEFAULT]/scheduler_host_subset_size
#host_subset_size=1
-host_subset_size=30
+host_subset_size = {{ controller.get('host_subset_size', '1') }}
#
# The number of instances that can be actively performing IO on a host.
diff --git a/nova/files/queens/nova-controller.conf.Debian b/nova/files/queens/nova-controller.conf.Debian
index 17d0c4f..07b676c 100644
--- a/nova/files/queens/nova-controller.conf.Debian
+++ b/nova/files/queens/nova-controller.conf.Debian
@@ -4676,7 +4676,7 @@
# (integer value)
# Minimum value: 1
# Deprecated group/name - [DEFAULT]/scheduler_host_subset_size
-host_subset_size = 30
+host_subset_size = {{ controller.get('host_subset_size', '1') }}
#
# The number of instances that can be actively performing IO on a