Ensure rsyslog restarts after configuration file changes

Added rsyslog restart handlers to each rsyslog_client_post_install task.
There was an issue when rsyslog_client_post_install would stop its service,
it would automatically get restarted and the service would not listen
for incoming logs. This now ensures that the rsyslog service will
be restarted after configuration files are changed.

Change-Id: I0cc9dd512fba6a1d583bf861a645097ae7c1d852
Partial-Bug: 1636017

handlers/main.yml

@@ -0,0 +1,7 @@
+---
+
+- name: restart rsyslog
+  service:
+    name: rsyslog
+    state: restarted
+

tasks/rsyslog_client_post_install.yml

@@ -13,14 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-- name: Stop rsyslog
-  service:
-    name: "rsyslog"
-    state: "stopped"
-  failed_when: false
-  tags:
-    - rsyslog_client-install
-
 - name: Rsyslog Setup
   copy:
     src: "50-default.conf"
@@ -29,6 +21,8 @@
     group: "root"
   tags:
     - rsyslog_client-install
+  notify:
+    - restart rsyslog
 
 - name: Check if log dir exists
   stat:
@@ -75,6 +69,8 @@
     group: "root"
   tags:
     - rsyslog_client-config
+  notify:
+    - restart rsyslog
 
 - name: Write rsyslog target file
   template:
@@ -85,6 +81,8 @@
   when: (rsyslog_client_all_log_files | length) > 0
   tags:
     - rsyslog_client-config
+  notify:
+    - restart rsyslog
 
 - name: Write log rotate file
   template:
@@ -104,10 +102,3 @@
     backrefs: yes
   tags:
     - rsyslog_client-install
-
-- name: Start rsyslog
-  service:
-    name: "rsyslog"
-    state: "started"
-  tags:
-    - rsyslog_client-config