Доработки:

- docker-machine мастером может быть удаленный хост (в оригинале только локалхост)
- исправлены баги
- в Pre-generate client certificate не увидел необходимости - закомментировал

defaults/main.yml

@@ -1,4 +1,6 @@
 ---
+docker_machine_master: 127.0.0.1
+docker_machine_executable: docker-machine
 docker_machine_create: false
 docker_machine_remove: false
 docker_machine_manage_config: false

tasks/docker_machine_check.yml

@@ -2,7 +2,7 @@
 - block: # Check and install Docker Machine
   - name: Get version of Docker Machine
     shell: docker-machine version | awk '{print substr($3, 1, length($3)-1)}'
-    delegate_to: 127.0.0.1
+    delegate_to: "{{ docker_machine_master }}"
     register: docker_machine_version
 
   # TODO Find the way to check version and better way to install docker machine
@@ -12,7 +12,7 @@
   #     dest: "{{ docker_machine_install_path }}"
   #     mode: 0755
   #     force: yes
-  #   delegate_to: 127.0.0.1
+  #   delegate_to: "{{ docker_machine_master }}"
   #   become: true
   #   when: docker_machine_version.stdout <= docker_machine_install_version
 

tasks/docker_machine_create.yml

@@ -1,37 +1,40 @@
 ---
-- block: # Pre-generate client certificate
-
-  - name: Check if client certificate exists
-    stat:
-      path: "{{ docker_machine_client_certificate_file }}"
-    run_once: true
-    register: docker_machine_client_certificate_check
-
-  - name: Generate client certificate
-    shell: |
-      docker-machine create --driver none --url http://not-exist delete-me;
-      docker-machine rm -f delete-me
-    delegate_to: 127.0.0.1
-    run_once: true
-    when: not docker_machine_client_certificate_check.stat.exists
+#- block: # Pre-generate client certificate
+#
+#  - name: Check if client certificate exists
+#    stat:
+#      path: "{{ docker_machine_client_certificate_file }}"
+#    run_once: true
+#    register: docker_machine_client_certificate_check
+#
+#  - name: Generate client certificate
+#    shell: |
+#      docker-machine create --driver none --url http://not-exist delete-me;
+#      docker-machine rm -f delete-me
+#    delegate_to: 127.0.0.1
+#    run_once: true
+#    when: not docker_machine_client_certificate_check.stat.exists
 
 
 - block: # Create Docker Machine
 
   - name: Remove Docker Machine
-    command: docker-machine rm -f {{ inventory_hostname }}
-    delegate_to: 127.0.0.1
+    command: "{{ docker_machine_executable }} rm -f {{ inventory_hostname }} --storage-path {{ docker_machine_storage_path }}"
+    delegate_to: "{{ docker_machine_master }}"
     when: docker_machine_host_check.stat.exists and docker_machine_remove
 
+  # can't use ansible_host if it is not set explicitly because of 'delegate_to'
+  # see https://github.com/ansible/ansible/issues/14958
+  - debug: msg={{ lookup('dig', inventory_hostname) }}
+    delegate_to: "{{ docker_machine_master }}"
   - name: Create Docker Machine
     command: |
-      docker-machine create --driver generic
-      --generic-ssh-user {{ ansible_user }}
-      --generic-ip-address {{ ansible_host }}
-      --generic-ssh-port {{ ansible_port }}
+      {{ docker_machine_executable }} create --driver generic
+      --generic-ssh-user root
+      --generic-ip-address {{ lookup('dig', inventory_hostname) }}
       {{ docker_machine_extra_parameters|default('') }}
       {{ inventory_hostname }}
-    delegate_to: 127.0.0.1
+    delegate_to: "{{ docker_machine_master }}"
     when: not docker_machine_host_check.stat.exists or docker_machine_remove
 
   tags:

tasks/docker_machine_manage_config.yml

@@ -3,6 +3,7 @@
   - name: Check if machine exists
     stat:
       path: "{{ docker_machine_config_file }}"
+    delegate_to: "{{ docker_machine_master }}"
     register: docker_machine_host_check
 
   - name: Search and replace Docker Machine configuration file
@@ -12,6 +13,7 @@
       replace: "{{ item.replace }}"
     with_items: "{{ docker_machine_config_variables }}"
     when: docker_machine_host_check.stat.exists == true
+    delegate_to: "{{ docker_machine_master }}"
 
   tags:
     - docker-machine-manage-config