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# Copyright (c) 2019 StackHPC Ltd.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import jinja2
from kolla_ansible import exception
from kolla_ansible.helpers import _call_bool_filter
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@jinja2.contextfilter
def service_enabled(context, service):
"""Return whether a service is enabled.
:param context: Jinja2 Context object.
:param service: Service definition, dict.
:returns: A boolean.
"""
enabled = service.get('enabled')
if enabled is None:
raise exception.FilterError(
"Service definition for '%s' does not have an 'enabled' attribute"
% service.get("container_name", "<unknown>"))
return _call_bool_filter(context, enabled)
@jinja2.contextfilter
def service_mapped_to_host(context, service):
"""Return whether a service is mapped to this host.
There are two ways to describe the service to host mapping. The most common
is via a 'group' attribute, where the service is mapped to all hosts in the
group. The second approach is via a 'host_in_groups' attribute, which is a
boolean expression which should be evaluated for every host. The latter
approach takes precedence over the first.
:param context: Jinja2 Context object.
:param service: Service definition, dict.
:returns: A boolean.
"""
host_in_groups = service.get("host_in_groups")
if host_in_groups is not None:
return _call_bool_filter(context, host_in_groups)
group = service.get("group")
if group is not None:
return group in context.get("group_names") or group == "all"
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raise exception.FilterError(
"Service definition for '%s' does not have a 'group' or "
"'host_in_groups' attribute" %
service.get("container_name", "<unknown>"))
@jinja2.contextfilter
def service_enabled_and_mapped_to_host(context, service):
"""Return whether a service is enabled and mapped to this host.
:param context: Jinja2 Context object.
:param service: Service definition, dict.
:returns: A boolean.
"""
return (service_enabled(context, service) and
service_mapped_to_host(context, service))
@jinja2.contextfilter
def select_services_enabled_and_mapped_to_host(context, services):
"""Select services that are enabled and mapped to this host.
:param context: Jinja2 Context object.
:param services: Service definitions, dict.
:returns: A dict containing enabled services mapped to this host.
"""
return {service_name: service
for service_name, service in services.items()
if service_enabled_and_mapped_to_host(context, service)}
def get_filters():
return {
"service_enabled": service_enabled,
"service_mapped_to_host": service_mapped_to_host,
"service_enabled_and_mapped_to_host": (
service_enabled_and_mapped_to_host),
"select_services_enabled_and_mapped_to_host": (
select_services_enabled_and_mapped_to_host),
}