Add MySQL connection SSL support

When 'neutron_galera_use_ssl' is True, use an encrypted connection to
the database using either a self-signed or user-provided CA certificate.

A new non-voting test has been added to verify that the role remains
functional when enabling SSL features.

Change-Id: Id576553bd481ed786ff0ed4948ce79bb74544000
Partial-Bug: 1667789

defaults/main.yml

@@ -179,6 +179,8 @@ neutron_galera_database: neutron
 neutron_db_max_overflow: 20
 neutron_db_pool_size: 120
 neutron_db_pool_timeout: 30
+neutron_galera_use_ssl: "{{ galera_use_ssl | default(False) }}"
+neutron_galera_ssl_ca_cert: "{{ galera_ssl_ca_cert | default('/etc/ssl/certs/galera-ca.pem') }}"
 
 ###
 ### RPC (RabbitMQ) integration

templates/neutron.conf.j2

@@ -187,7 +187,8 @@ memcache_secret_key = {{ memcached_encryption_key }}
 
 # Database
 [database]
-connection = mysql+pymysql://{{ neutron_galera_user }}:{{ neutron_container_mysql_password }}@{{ neutron_galera_address }}/{{ neutron_galera_database }}?charset=utf8
+connection = mysql+pymysql://{{ neutron_galera_user }}:{{ neutron_container_mysql_password }}@{{ neutron_galera_address }}/{{ neutron_galera_database }}?charset=utf8{% if neutron_galera_use_ssl | bool %}&ssl_ca={{ neutron_galera_ssl_ca_cert }}{% endif %}
+
 max_overflow = {{ neutron_db_max_overflow }}
 max_pool_size = {{ neutron_db_pool_size }}
 pool_timeout = {{ neutron_db_pool_timeout }}

tox.ini

@@ -170,6 +170,18 @@ commands =
     bash -c "{toxinidir}/tests/tests-repo-clone.sh"
     bash -c "{toxinidir}/tests/common/test-ansible-functional.sh"
 
+
+[testenv:ssl]
+deps =
+    {[testenv:ansible]deps}
+setenv =
+    {[testenv]setenv}
+    ANSIBLE_PARAMETERS=-vvv -e galera_use_ssl=True
+commands =
+    bash -c "{toxinidir}/tests/tests-repo-clone.sh"
+    bash -c "{toxinidir}/tests/common/test-ansible-functional.sh"
+
+
 [testenv:linters]
 deps =
     {[testenv:ansible]deps}

zuul.d/jobs.yaml

@@ -47,3 +47,10 @@
     voting: false
     vars:
       tox_env: ovs-nsh
+
+- job:
+    name: openstack-ansible-neutron-ssl-nv
+    parent: openstack-ansible-functional-ubuntu-xenial
+    voting: false
+    vars:
+      tox_env: ssl

zuul.d/project.yaml

@@ -27,6 +27,7 @@
         - openstack-ansible-dragonflow-ubuntu-xenial-nv
         - openstack-ansible-opendaylight-ubuntu-xenial-nv
         - openstack-ansible-ovs-nsh-ubuntu-xenial
+        - openstack-ansible-neutron-ssl-nv
     experimental:
       jobs:
         - openstack-ansible-integrated-deploy-aio
@@ -37,4 +38,4 @@
         - openstack-ansible-functional-opensuse-423
         - openstack-ansible-functional-ubuntu-xenial
         - openstack-ansible-upgrade-ubuntu-xenial
-
+        - openstack-ansible-neutron-ssl-nv