Disable Ceilometer API by default on undercloud

Ceilometer API has already been deprecated in Ocata. Lets stop
deploying it by default on undercloud.

Closes-bug: #1676968

Change-Id: I27ce7d480be1196aff5dec3dfb6e1d7f5651c852

elements/puppet-stack-config/puppet-stack-config.pp

@@ -171,7 +171,7 @@ if str2bool(hiera('enable_telemetry', true)) {
   include ::ceilometer::keystone::auth
   include ::aodh::keystone::auth
   include ::ceilometer
-  if str2bool(hiera('enable_legacy_ceilometer_api', true)) {
+  if str2bool(hiera('enable_legacy_ceilometer_api', false)) {
     include ::ceilometer::api
     include ::ceilometer::wsgi::apache
   }

instack_undercloud/undercloud.py

@@ -314,7 +314,7 @@ _opts = [
                 help=('Whether to install the Volume service to be boot '
                       'overcloud nodes from remote volumes.')),
     cfg.BoolOpt('enable_legacy_ceilometer_api',
-                default=True,
+                default=False,
                 help=('Whether to enable legacy ceilometer api '
                       'in the Undercloud. '
                       'Note: Ceilometer API has been deprecated and will be '

releasenotes/notes/disable-ceilometer-api-14b270afc22d75c1.yaml

@@ -0,0 +1,6 @@
+---
+deprecations:
+  - Ceilometer API is deprecated since ocata release.
+fixes:
+  - Ceilometer API is now disabled by default. This has been deprecated
+    since ocata release. Use gnocchi/aodh and panko APIs instead.

undercloud.conf.sample

@@ -171,7 +171,7 @@
 # Ceilometer API has been deprecated and will be removed in future
 # release. Please consider moving to gnocchi/Aodh/Panko API instead.
 # (boolean value)
-#enable_legacy_ceilometer_api = true
+#enable_legacy_ceilometer_api = false
 
 # Whether to install novajoin metadata service in the Undercloud.
 # (boolean value)