Ensure the log folder exists

Restarting the apache service under ubuntu read the envvars file.
This envvars contains the folder for logrotate. If the folder
doesn't exist or hasn't the apache permissions, the restart of
the service will fail.

We ensure here the folder properly exists, with the right
permissions.

Change-Id: I041a044ef88aff917eeb3a618c2c08ac9ceb80fe

tasks/horizon_apache.yml

@@ -13,6 +13,13 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+- name: Ensure apache log folder exists
+  file:
+    dest: "{{ horizon_apache_default_log_folder }}"
+    state: directory
+    owner: "{{ horizon_apache_default_log_owner }}"
+    group: "{{ horizon_apache_default_log_grp }}"
+
 # Workaround for https://github.com/ansible/ansible-modules-core/issues/5328
 # TODO: Replace using apache2_module when fixed in Ansible release
 - name: Enable apache2 modules

vars/debian.yml

@@ -31,6 +31,9 @@ horizon_distro_packages:
   - gettext
 
 horizon_apache_conf: "/etc/apache2/apache2.conf"
+horizon_apache_default_log_folder: "/var/log/apache2"
+horizon_apache_default_log_owner: "root"
+horizon_apache_default_log_grp: "adm"
 horizon_apache_security_conf: "/etc/apache2/conf-available/security.conf"
 
 horizon_apache_site_available: "/etc/apache2/sites-available/openstack-dashboard.conf"

vars/redhat-7.yml

@@ -31,6 +31,9 @@ horizon_distro_packages:
   - which
 
 horizon_apache_conf: "/etc/httpd/conf/httpd.conf"
+horizon_apache_default_log_folder: "/var/log/httpd"
+horizon_apache_default_log_owner: "root"
+horizon_apache_default_log_grp: "root"
 horizon_apache_security_conf: "{{ horizon_apache_conf }}"
 
 horizon_apache_configs: