Create config variables for zuul user

Remove hardcoded user settings and allow a user to override them.

Change-Id: I126b0bbd53e2fec63eb48c15762561ab757d27c6
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

README.rst

@@ -34,6 +34,20 @@ should be copied to ``zuul_config_gerrit_sshkey``.
 Role Variables
 --------------
 
+.. code-block:: yaml
+
+    # Name of the user to be created.
+    # Default: zuul
+    zuul_user_name: zuul
+
+    # Name of the group to be created.
+    # Default: zuul
+    zuul_user_group: zuul
+
+    # Path of home directory to be created.
+    # Default: /var/lib/zuul
+    zuul_user_home: /var/lib/zuul
+
 Dependencies
 ------------
 

defaults/main.yaml

@@ -13,6 +13,10 @@
 # under the License.
 ---
 # tasks/config.yaml
+zuul_user_name: zuul
+zuul_user_group: "{{ zuul_user_name }}"
+zuul_user_home: "/var/lib/${{ zuul_user_name }}"
+
 zuul_config_gearman_port: 4730
 zuul_config_gearman_server: localhost
 
@@ -22,16 +26,16 @@ zuul_config_gearman_server_log_config: /etc/zuul/gearman-logging.conf
 
 zuul_config_gerrit_port: 29418
 zuul_config_gerrit_server: localhost
-zuul_config_gerrit_sshkey: /var/lib/zuul/.ssh/id_rsa
+zuul_config_gerrit_sshkey: "{{ zuul_user_home }}/.ssh/id_rsa"
 zuul_config_gerrit_user: zuul
 
-zuul_config_merger_git_dir: /var/lib/zuul/git
+zuul_config_merger_git_dir: "{{ zuul_user_home }}/git"
 zuul_config_merger_log_config: /etc/zuul/merger-logging.conf
 zuul_config_merger_zuul_url: localhost
 
 zuul_config_zuul_layout_config: /etc/zuul/layout.yaml
 zuul_config_zuul_log_config: /etc/zuul/server-logging.conf
-zuul_config_zuul_state_dir: /var/lib/zuul
+zuul_config_zuul_state_dir: "{{ zuul_user_home }}"
 
 zuul_file_gearman_logging_conf: etc/zuul/gearman-logging.conf
 zuul_file_merger_logging_conf: etc/zuul/merger-logging.conf

tasks/config.yaml

@@ -12,16 +12,21 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 ---
-- name: Create system user account.
+- name: Create group account.
+  group:
+    name: "{{ zuul_user_group }}"
+
+- name: Create user account.
   user:
     createhome: yes
-    home: /var/lib/zuul
-    name: zuul
+    home: "{{ zuul_user_home }}"
+    group: "{{ zuul_user_group }}"
+    name: "{{ zuul_user_name }}"
 
 - name: Create required directories.
   file:
-    group: zuul
-    owner: zuul
+    group: "{{ zuul_user_group }}"
+    owner: "{{ zuul_user_name }}"
     path: "{{ item }}"
     state: directory
   with_items: