Add handler to check if jenkins is alive

Change-Id: I63c14ab98a0acc8813a76ff71a9c29a8942e356b
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

defaults/main.yaml

@@ -47,3 +47,7 @@ jenkins_job_builder_install_method: git
 
 jenkins_job_builder_pip_name: jenkins-job-builder
 jenkins_job_builder_pip_version:
+
+# handlers/main.yaml
+jenkins_job_builder_handler_check_delay: 10
+jenkins_job_builder_handler_check_retries: 3

handlers/main.yaml

@@ -12,6 +12,13 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 ---
+- name: Check jenkins
+  delay: " {{ jenkins_job_builder_handler_check_delay }}"
+  shell: "curl --head --silent {{ jenkins_job_builder_config_jenkins_url }}"
+  register: result
+  retries: "{{ jenkins_job_builder_handler_check_retries }}"
+  until: result.stdout.find('200 OK') != -1
+
 - name: Reload jenkins-jobs
   shell: "jenkins-jobs --conf {{ jenkins_job_builder_template_jenkins_jobs_ini_dest }} update {{ jenkins_job_builder_file_jobs_dest }} --delete-old"
   sudo: yes

tasks/config.yaml

@@ -45,4 +45,6 @@
     perms: yes
     src: "{{ jenkins_job_builder_file_jobs_src }}"
   when: jenkins_job_builder_file_jobs_src != ""
-  notify: Reload jenkins-jobs
+  notify:
+    - Check jenkins
+    - Reload jenkins-jobs