cp -r nginx/ app/ 虚构一个role

vim some_role3.yml

– hosts: all

romete_user: root

roles:

– { role: httpd,tags:‘web’,’httpd’}

– { role: nginx,tags:‘web’,’nginx’,when: ansible_distribution_major_version==”7″}

– { role: app,tags:’app’}

ansible-playbook -t web some_role.yml

执行结果：至执行tags标签为web的roles，当主版本号为7时，才执行nginx的role