add proxy_env for docker installation

defaults/main.yml

@@ -36,3 +36,8 @@ docker_users: []
 
 # Docker daemon options as a dict
 docker_daemon_options: {}
+
+# proxy env, if defined, env vars https_proxy and http_proxy will be injected.
+proxy_env:
+  http_proxy: 'http://10.0.45.5:8118'
+  https_proxy: 'http://10.0.45.5:8118'

tasks/docker-compose.yml

@@ -18,6 +18,7 @@
     url: "{{ docker_compose_url }}"
     dest: "{{ docker_compose_path }}"
     mode: 0755
+  environment: "{{ proxy_env }}"
   when: >
     docker_compose_current_version.stdout is not defined
     or docker_compose_version not in docker_compose_current_version.stdout

tasks/main.yml

@@ -11,6 +11,7 @@
     state: "{{ docker_package_state }}"
   notify: restart docker
   ignore_errors: "{{ ansible_check_mode }}"
+  environment: "{{ proxy_env }}"
 
 - name: Ensure /etc/docker/ directory exists.
   file: