Dynamically determine whether ceilometer should be enabled

Currently each service requires a var to be set to enable the
configuration of ceilometer for the service.

This patch makes this setting dynamic based on whether there
are any hosts in the ceilometer_all host group.

This reduces the amount of configuration required for an
environment, making OSA simpler to use.

The 'rabbitmq_servers' group_var was previously a list of
'host:port' combinations. It is now only a set of hosts.

The new 'transport_url' configuration option for oslo_messaging
is not working with SSL enabled, so SSL transport for RabbitMQ
has been temporarily disabled.

Change-Id: Ia5ba4e26b9adcfd923a93c6ea5077cbec0c4478d

etc/openstack_deploy/user_variables.yml

@@ -26,16 +26,6 @@ debug: false
 # ceilometer_db_ip: localhost
 # ceilometer_db_port: 27017
 
-## Common Override to enable Ceilometer for each service.
-## By default all service are *not* enabled.
-# swift_ceilometer_enabled: True
-# heat_ceilometer_enabled: True
-# cinder_ceilometer_enabled: True
-# glance_ceilometer_enabled: True
-# nova_ceilometer_enabled: True
-# neutron_ceilometer_enabled: True
-# keystone_ceilometer_enabled: True
-
 ## Common Glance Overrides
 # Set glance_default_store to "swift" if using Cloud Files or swift backend
 # or "rbd" if using ceph backend; the latter will trigger ceph to get

playbooks/inventory/group_vars/all.yml

@@ -55,8 +55,10 @@ galera_root_user: "root"
 
 ## RabbitMQ
 rabbitmq_port: "{{ (rabbitmq_use_ssl | bool) | ternary(5671, 5672) }}"
-rabbitmq_servers: "{% for host in groups['rabbitmq_all'] %}{{ hostvars[host]['ansible_ssh_host'] }}:{{ rabbitmq_port }}{% if not loop.last %},{% endif %}{% endfor %}"
+rabbitmq_servers: "{% for host in groups['rabbitmq_all'] %}{{ hostvars[host]['ansible_ssh_host'] }}{% if not loop.last %},{% endif %}{% endfor %}"
-rabbitmq_use_ssl: true
+# TODO(odyssey4me)
+# The new transport_url configuration option is not working with SSL enabled. Revisit this ASAP.
+rabbitmq_use_ssl: false
 
 ## Enable external SSL handling for general OpenStack services
 openstack_external_ssl: true

playbooks/inventory/group_vars/cinder_all.yml

@@ -19,3 +19,6 @@ cinder_service_region: "{{ service_region }}"
 cinder_service_in_ldap: "{{ service_ldap_backend_enabled }}"
 cinder_glance_api_servers: "{{ glance_api_servers }}"
 cinder_glance_api_version: "{{ (cinder_backends_rbd_inuse|bool and glance_default_store == 'rbd') | ternary('2','1') }}"
+
+# If there are any Ceilometer hosts in the environment, then enable its usage
+cinder_ceilometer_enabled: "{{ (groups['ceilometer_all'] is defined) and (groups['ceilometer_all'] | length > 0) }}"

playbooks/inventory/group_vars/glance_all.yml

@@ -15,3 +15,6 @@
 
 glance_service_region: "{{ service_region }}"
 glance_service_in_ldap: "{{ service_ldap_backend_enabled }}"
+
+# If there are any Ceilometer hosts in the environment, then enable its usage
+glance_ceilometer_enabled: "{{ (groups['ceilometer_all'] is defined) and (groups['ceilometer_all'] | length > 0) }}"

playbooks/inventory/group_vars/heat_all.yml

@@ -15,3 +15,6 @@
 
 heat_service_region: "{{ service_region }}"
 heat_service_in_ldap: "{{ service_ldap_backend_enabled }}"
+
+# If there are any Ceilometer hosts in the environment, then enable its usage
+heat_ceilometer_enabled: "{{ (groups['ceilometer_all'] is defined) and (groups['ceilometer_all'] | length > 0) }}"

playbooks/inventory/group_vars/keystone_all.yml

@@ -18,3 +18,6 @@ keystone_external_ssl: "{{ openstack_external_ssl }}"
 keystone_cache_backend_argument: "url:{% for host in groups['memcached'] %}{{ hostvars[host]['container_address'] }}{% if not loop.last %},{% endif %}{% endfor %}:{{ memcached_port }}"
 keystone_memcached_servers: "{% for host in groups['keystone_all'] %}{{ hostvars[host]['container_address'] }}:{{ memcached_port }}{% if not loop.last %},{% endif %}{% endfor %}"
 keystone_service_in_ldap: "{{ service_ldap_backend_enabled }}"
+
+# If there are any Ceilometer hosts in the environment, then enable its usage
+keystone_ceilometer_enabled: "{{ (groups['ceilometer_all'] is defined) and (groups['ceilometer_all'] | length > 0) }}"

playbooks/inventory/group_vars/neutron_all.yml

@@ -25,3 +25,6 @@ neutron_rabbitmq_vhost: /neutron
 neutron_rabbitmq_port: "{{ rabbitmq_port }}"
 neutron_rabbitmq_servers: "{{ rabbitmq_servers }}"
 neutron_rabbitmq_use_ssl: "{{ rabbitmq_use_ssl }}"
+
+# If there are any Ceilometer hosts in the environment, then enable its usage
+neutron_ceilometer_enabled: "{{ (groups['ceilometer_all'] is defined) and (groups['ceilometer_all'] | length > 0) }}"

playbooks/inventory/group_vars/nova_all.yml

@@ -18,3 +18,6 @@ nova_ceph_client_uuid: '{{ cinder_ceph_client_uuid | default() }}'
 nova_dhcp_domain: "{{ dhcp_domain }}"
 nova_service_in_ldap: "{{ service_ldap_backend_enabled }}"
 nova_glance_api_servers: "{{ glance_api_servers }}"
+
+# If there are any Ceilometer hosts in the environment, then enable its usage
+nova_ceilometer_enabled: "{{ (groups['ceilometer_all'] is defined) and (groups['ceilometer_all'] | length > 0) }}"

playbooks/inventory/group_vars/swift_all.yml

@@ -15,3 +15,6 @@
 
 swift_service_region: "{{ service_region }}"
 swift_service_in_ldap: "{{ service_ldap_backend_enabled }}"
+
+# If there are any Ceilometer hosts in the environment, then enable its usage
+swift_ceilometer_enabled: "{{ (groups['ceilometer_all'] is defined) and (groups['ceilometer_all'] | length > 0) }}"

releasenotes/notes/dynamic-ceilometer-enablement-18be0bb994ede62a.yaml

@@ -0,0 +1,7 @@
+---
+features:
+  - Whether ceilometer should be enabled by default for each service
+    is now dynamically determined based on whether there are any
+    ceilometer hosts/containers deployed. This behaviour can still
+    be overridden by toggling ``<service>_ceilometer_enabled`` in
+    ``/etc/openstack_deploy/user_variables.yml``.

tests/roles/bootstrap-host/templates/user_variables.aio.yml.j2

@@ -20,13 +20,6 @@ debug: True
 ceilometer_db_type: mongodb
 ceilometer_db_ip: {{ bootstrap_host_mongodb_address }}
 ceilometer_db_port: 27017
-cinder_ceilometer_enabled: True
-glance_ceilometer_enabled: True
-heat_ceilometer_enabled: True
-neutron_ceilometer_enabled: True
-nova_ceilometer_enabled: True
-swift_ceilometer_enabled: False
-keystone_ceilometer_enabled: True
 
 ## Aodh Options
 aodh_db_type: mongodb