Support runner options for Docker Machine

defaults/main.yml

@@ -10,7 +10,7 @@ gitlab_runner_coordinator_url: 'https://gitlab.com/ci'
 # GitLab registration token
 gitlab_runner_registration_token: ''
 # Runner description
-gitlab_runner_description: '{{ ansible_hostname }}'
+gitlab_runner_description_base: '{{ ansible_hostname }}'
 # Runner executor
 gitlab_runner_executor: 'shell'
 # Maximum number of jobs to run concurrently on this specific runner
@@ -32,4 +32,18 @@ gitlab_runner_ssh_password: ''
 # Runner SSH identity file
 gitlab_runner_ssh_identity_file: ''
 # Runner Locked
-gitlab_runner_locked: 'false'
+gitlab_runner_locked: false
+
+# Individual runners
+gitlab_runners:
+  - {
+      description: '{{ gitlab_runner_description_base }}'
+  }
+
+# Runner machine
+gitlab_runner_machine_idle_nodes: 0
+gitlab_runner_machine_idle_time: 3
+
+# Docker Machine
+docker_machine_version: 'v0.15.0'
+docker_machine_binary_dest: /usr/local/bin/docker-machine