Enable splay for os-collect-config

At scale, having the os-collect-config instances all check in at the
same time can cause performance problems. This change enables splay and
sets it to a default maximum random sleep of 30 seconds prior to the
os-collect-config polling.

Change-Id: Iab8b51f4e5fb4727b8aa7e081f5cbfcbf11f7fcb
Depends-On: I88f623c9e8db9ed4a186918206a63faec8f7f673
Closes-Bug: #1677314

1 files changed, 10 insertions, 0 deletions

diff --git a/puppet/role.role.j2.yaml b/puppet/role.role.j2.yaml
index 1f68f41f..373318f9 100644
--- a/puppet/role.role.j2.yaml
+++ b/puppet/role.role.j2.yaml
@@ -125,6 +125,15 @@ parameters:
     type: string
     description: Command which will be run whenever configuration data changes
     default: os-refresh-config --timeout 14400
+  ConfigCollectSplay:
+    type: number
+    default: 30
+    description: |
+      Maximum amount of time to possibly to delay configuation collection
+      polling. Defaults to 30 seconds. Set to 0 to disable it which will cause
+      the configuration collection to occur as soon as the collection process
+      starts.  This setting is used to prevent the configuration collection
+      processes from polling all at the exact same time.
   LoggingSources:
     type: json
     default: []
@@ -152,6 +161,7 @@ resources:
     metadata:
       os-collect-config:
         command: {get_param: ConfigCommand}
+        splay: {get_param: ConfigCollectSplay}
     properties:
       image: {get_param: {{role}}Image}
       image_update_policy: {get_param: ImageUpdatePolicy}