use ansible_service_mgr to detect init system

roles/kubernetes/master/tasks/main.yml

@@ -18,7 +18,7 @@
     src: "kube-apiserver.service.j2"
     dest: "/etc/systemd/system/kube-apiserver.service"
     backup: yes
-  when: init_system == "systemd"
+  when: ansible_service_mgr == "systemd"
   notify: restart kube-apiserver
 
 - name: install | Write kube-apiserver initd script
@@ -28,7 +28,7 @@
     owner: root
     mode: 0755
     backup: yes
-  when: init_system == "sysvinit" and ansible_os_family == "Debian"
+  when: ansible_service_mgr in ["sysvinit","upstart"] and ansible_os_family == "Debian"
 
 - name: Write kube-apiserver config file
   template:

roles/kubernetes/master/tasks/start.yml

@@ -4,7 +4,7 @@
 
 - name: reload systemd
   command: systemctl daemon-reload
-  when: init_system == "systemd" and restart_apimaster is defined and restart_apimaster == True
+  when: ansible_service_mgr == "systemd" and restart_apimaster is defined and restart_apimaster == True
 
 - name: reload kube-apiserver
   service:

roles/kubernetes/master/templates/kube-apiserver.j2

@@ -3,7 +3,7 @@
 #
 # The following values are used to configure the kube-apiserver
 
-{% if init_system == "sysvinit" %}
+{% if ansible_service_mgr in ["sysvinit","upstart"] %}
 # Logging directory
 KUBE_LOGGING="--log-dir={{ kube_log_dir }} --logtostderr=true"
 {% else %}
@@ -38,7 +38,7 @@ KUBE_TLS_CONFIG="--tls_cert_file={{ kube_cert_dir }}/apiserver.pem --tls_private
 # Add you own!
 KUBE_API_ARGS="--token_auth_file={{ kube_token_dir }}/known_tokens.csv --basic-auth-file={{ kube_users_dir }}/known_users.csv --service_account_key_file={{ kube_cert_dir }}/apiserver-key.pem"
 
-{% if init_system == "sysvinit" %}
+{% if ansible_service_mgr in ["sysvinit","upstart"] %}
 DAEMON_ARGS="$KUBE_LOGGING $KUBE_LOG_LEVEL $KUBE_ALLOW_PRIV $KUBE_API_PORT $KUBE_SERVICE_ADDRESSES \
 $KUBE_ETCD_SERVERS $KUBE_ADMISSION_CONTROL $KUBE_RUNTIME_CONFIG $KUBE_TLS_CONFIG $KUBE_API_ARGS"
 {% endif %}