Ansible execute each role in different host -

my intention execute each role in different host. doing simple task of downloading files in each host. have host file looks so

[groupa] 10.0.1.20  [groupb] 10.0.1.21 

below main_file.yml file

---   - hosts: local     connection: local     gather_facts: no     roles:       - oracle       - apache 

structure of roles

main_file.yml roles |-- oracle |   |-- tasks |       |-- main.yml |       |-- download_file.yml |-- apache |   |-- tasks |       |-- main.yml |       |-- download_file.yml 

oracle/main.yml

--- - name: downloading file in groupa   hosts: groupa   tasks:     - include: tasks/download_file.yml 

oracle/download_file.yml

--- - name: download file   shell: wget http://dummyurl.com/random.sh 

same steps followed apache role "groupb". when execute main_file.yml getting below error

error! no action detected in task. indicates misspelled module name, or incorrect module path.  error appears have been in '/etc/ansible/roles/oracle/tasks/main.yml': line 2, column 3, may elsewhere in file depending on exact syntax problem.  offending line appears be:  --- - name: downloading file   ^ here 

in ansible there 2 levels, 1 playbook level, other 1 task level. on playbook level can specify hosts want run tasks on, under tasks level no longer possible, hosts have been specified. roles included @ tasks level, cannot have hosts declarations inside them.

you should remove hosts main.yml, , have include:

--- - name: downloading file in groupa   include: download_file.yml 

as roles templates specific host, if want them run on specific host include them in playbook accordingly. example in main_file.yml can write following:

--- - hosts: groupa   roles:     - oracle  - hosts: groupb   roles:     - apache  - hosts: local   connection: local   tasks:     - { debug: { msg: "tasks run locally" } }