Fix default deployment of freezer, use mariadb.

This change defaults freezer to use mariadb as default backend for database
and adds elasticsearch as an optional backend due to the requirement of
freezer to use elasticsearch version 2.3.0. The default elasticsearch in
kolla-ansible is 5.6.x and that doesn't work with freezer.

Added needed options to the elasticsearch backend like:
 - protocol
 - address
 - port
 - number of replicas

Change-Id: I88616c285bdb297fd1f738846ddffe1b08a7a827
Signed-off-by: Marek Svensson <marek@marex.st>

ansible/group_vars/all.yml

@@ -684,7 +684,7 @@ skip_stop_containers: []
 ####################
 
 elasticsearch_address: "{{ kolla_internal_fqdn }}"
-enable_elasticsearch: "{{ 'yes' if enable_central_logging | bool or enable_freezer | bool or enable_osprofiler | bool or enable_skydive | bool or enable_monasca | bool else 'no' }}"
+enable_elasticsearch: "{{ 'yes' if enable_central_logging | bool or enable_osprofiler | bool or enable_skydive | bool or enable_monasca | bool else 'no' }}"
 enable_kibana: "{{ 'yes' if enable_central_logging | bool or enable_monasca | bool else 'no' }}"
 
 ####################

ansible/roles/freezer/defaults/main.yml

@@ -28,6 +28,17 @@ freezer_services:
     volumes: "{{ freezer_scheduler_default_volumes + freezer_scheduler_extra_volumes }}"
     dimensions: "{{ freezer_scheduler_dimensions }}"
 
+####################
+## Database
+#####################
+freezer_database_backend: "mariadb"
+freezer_database_name: "freezer"
+freezer_database_user: "{% if use_preconfigured_databases | bool and use_common_mariadb_user | bool %}{{ database_user }}{% else %}freezer{% endif %}"
+freezer_database_address: "{{ database_address }}:{{ database_port }}"
+freezer_elasticsearch_replicas: "1"
+freezer_es_protocol:
+freezer_es_address:
+freezer_es_port:
 
 ####################
 # Docker

ansible/roles/freezer/tasks/bootstrap.yml

@@ -0,0 +1,38 @@
+---
+- name: Creating Freezer database
+  kolla_toolbox:
+    module_name: mysql_db
+    module_args:
+      login_host: "{{ database_address }}"
+      login_port: "{{ database_port }}"
+      login_user: "{{ database_user }}"
+      login_password: "{{ database_password }}"
+      name: "{{ freezer_database_name }}"
+  become: true
+  register: database
+  run_once: True
+  delegate_to: "{{ groups['freezer-api'][0] }}"
+  when:
+    - not use_preconfigured_databases | bool
+
+- name: Creating Freezer database user and setting permissions
+  kolla_toolbox:
+    module_name: mysql_user
+    module_args:
+      login_host: "{{ database_address }}"
+      login_port: "{{ database_port }}"
+      login_user: "{{ database_user }}"
+      login_password: "{{ database_password }}"
+      name: "{{ freezer_database_user }}"
+      password: "{{ freezer_database_password }}"
+      host: "%"
+      priv: "{{ freezer_database_name }}.*:ALL"
+      append_privs: "yes"
+  become: true
+  run_once: True
+  delegate_to: "{{ groups['freezer-api'][0] }}"
+  when:
+    - not use_preconfigured_databases | bool
+
+- include_tasks: bootstrap_service.yml
+  when: database.changed or use_preconfigured_databases | bool

ansible/roles/freezer/tasks/deploy.yml

@@ -6,6 +6,9 @@
   when: inventory_hostname in groups['freezer-api'] or
         inventory_hostname in groups['freezer-scheduler']
 
+- include_tasks: bootstrap.yml
+  when: freezer_database_backend == 'mariadb' and inventory_hostname in groups['freezer-api']
+
 - include_tasks: bootstrap_service.yml
   when: inventory_hostname in groups['freezer-api']
 

ansible/roles/freezer/templates/freezer.conf.j2

@@ -46,12 +46,25 @@ enable_proxy_headers_parsing = True
 [paste_deploy]
 config_file = /etc/freezer/freezer-paste.ini
 
+
+{% if freezer_database_backend == 'mariadb' %}
+[storage]
+backend = sqlachemy
+driver = sqlalchemy
+
+[database]
+connection = mysql+pymysql://{{ freezer_database_user }}:{{ freezer_database_password }}@{{ freezer_database_address }}/{{ freezer_database_name }}
+max_retries = -1
+{% endif %}
+
+{% if freezer_database_backend == 'elasticsearch' %}
 [storage]
 backend = elasticsearch
 driver = elasticsearch
 
 [elasticsearch]
-hosts = {{ internal_protocol }}://{{ kolla_internal_fqdn }}:{{ elasticsearch_port }}
-number_of_replicas = 0
+hosts = {{ freezer_es_protocol }}://{{ freezer_es_address }}:{{ freezer_es_port }}
+number_of_replicas = {{ freezer_elasticsearch_replicas }}
 index = freezer
 {% endif %}
+{% endif %}

etc/kolla/globals.yml

@@ -565,3 +565,12 @@
 #enable_prometheus_ceph_mgr_exporter: "{{ enable_prometheus | bool and enable_ceph | bool }}"
 #enable_prometheus_openstack_exporter: "{{ enable_prometheus | bool }}"
 #enable_prometheus_elasticsearch_exporter: "{{ enable_prometheus | bool and enable_elasticsearch | bool }}"
+
+#########
+# Freezer
+#########
+# Freezer can utilize two different database backends, elasticsearch or mariadb.
+# Elasticsearch is preferred, however it is not compatible with the version deployed
+# by kolla-ansible. You must first setup an external elasticsearch with 2.3.0.
+# By default, kolla-ansible deployed mariadb is the used database backend.
+#freezer_database_backend: "mariadb"

releasenotes/notes/freezer-backend-531eececd69c0cd4.yaml

@@ -0,0 +1,13 @@
+---
+upgrade:
+  - |
+    Freezer now use MariaDB as default backend for database.
+
+    Elasticsearch remains as an optional backend due to the requirement of
+    Freezer to use Elasticsearch version 2.3.0. Elasticsearch in kolla-ansible
+    is 5.6.x and that doesn't work with Freezer.
+
+    New variables have been added:: ``freezer_database_backend``,
+    ``freezer_database_name``, ``freezer_database_user``,
+    ``freezer_database_address``, ``freezer_elasticsearch_replicas``,
+    ``freezer_es_protocol``, ``freezer_es_address``, ``freezer_es_port``