Fix controller logs in docker-machine (apache#4079)

* Fix controller logs in docker-machine

With the change apache#3579, controller logs file was not being created due to lack of permissions when OW is deployed on docker-machine. This is because ansible is not able to create a folder with full permissions within a mounted folder in docker-machine. However creating a file with full permissions through ansible does work.

* Adding condition to check for docker-machine

This change is needed only for docker-machine

ansible/roles/controller/tasks/deploy.yml

@@ -27,6 +27,15 @@
     mode: 0777
   become: "{{ logs.dir.become }}"
 
+# We need to create the file with proper permissions because the dir creation above
+# does not result in a dir with full permissions in docker machine especially with macos mounts
+- name: ensure controller log file is created with permissions
+  file:
+    path: "{{ whisk_logs_dir }}/{{ controller_name }}/{{ controller_name }}_logs.log"
+    state: touch
+    mode: 0777
+  when: environment_type is defined and environment_type == "docker-machine"
+
 - name: ensure controller config directory is created with permissions
   file:
     path: "{{ controller.confdir }}/{{ controller_name }}"