增加配置项是否启用docker仓库镜像

roles/docker/defaults/main.yml

@@ -10,3 +10,9 @@ STORAGE_DIR: "/var/lib/docker"
 
 # 开启Restful API
 ENABLE_REMOTE_API: false
+
+# 启用 docker 仓库镜像
+ENABLE_MIRROR_REGISTRY: true
+
+# 设置 docker 仓库镜像
+REG_MIRRORS: '["https://dockerhub.azk8s.cn", "https://docker.mirrors.ustc.edu.cn"]'

roles/docker/templates/daemon.json.j2

@@ -1,9 +1,10 @@
 {
-  "registry-mirrors": [
-    "https://dockerhub.azk8s.cn",
-    "https://docker.mirrors.ustc.edu.cn",
-    "http://hub-mirror.c.163.com"
-  ],
+{% if ENABLE_MIRROR_REGISTRY %}
+  "registry-mirrors": {{ REG_MIRRORS }}, 
+{% endif %}
+{% if ENABLE_REMOTE_API %}
+  "hosts": ["tcp://0.0.0.0:2376", "unix:///var/run/docker.sock"],
+{% endif %}
   "max-concurrent-downloads": 10,
   "log-driver": "{{ LOG_DRIVER }}",
   "log-level": "{{ LOG_LEVEL }}",
@@ -12,7 +13,4 @@
     "max-file": "{{ LOG_MAX_FILE }}"
     },
   "data-root": "{{ STORAGE_DIR }}"
-  {% if ENABLE_REMOTE_API %}
-  , "hosts": ["tcp://0.0.0.0:2376", "unix:///var/run/docker.sock"]
-  {% endif %}
 }