ERROR! A malformed block was encountered while loading a block

[root@ansible test]# ansible-playbook -C roles_redis.yml -i hosts
ERROR! A malformed block was encountered while loading a block

原因：

写main 文件的时候 include 后面没有加 ：

- include add_group.yml

解决：

空格格式问题一定要注意，规范很严格

- include: add_group.yml