[root@master1 etc]# yum install -yq epel-release && sudo yum install -yq ansible
[root@master1 etc]# cat <<EOF > $HOME/ansible-nginx/deploy.yml
- hosts: nginx
  tasks:
    - include: 'tasks/install_nginx.yml'
EOF
[root@master1 etc]# cat <<EOF > $HOME/ansible-nginx/tasks/install_nginx.yml
- name: NGINX | Installing NGINX repo rpm
  yum:
    name: http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm
- name: NGINX | Installing NGINX
  yum:
    name: nginx
    state: latest
- name: NGINX | Starting NGINX
  service:
    name: nginx
    state: started
EOF
[root@master1 etc]# mv /etc/ansible/hosts /etc/ansible/hosts.backup
[root@master1 etc]# cat <<EOF > /etc/ansible/hosts
# /etc/ansible/hosts
[nginx]
master2
EOF
 

[root@master1 etc]# sudo ansible-playbook --ask-pass $HOME/ansible-nginx/deploy.yml
SSH password:

PLAY [nginx] ************************************************************************************************************************

TASK [Gathering Facts] **************************************************************************************************************
ok: [master2]

TASK [NGINX | Installing NGINX repo rpm] ********************************************************************************************
changed: [master2]

TASK [NGINX | Installing NGINX] *****************************************************************************************************
changed: [master2]

TASK [NGINX | Starting NGINX] *******************************************************************************************************
changed: [master2]

PLAY RECAP **************************************************************************************************************************
master2 : ok=4 changed=3 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0

[root@master2 kubelet]# ps -ef | grep nginx
root 48337 1 0 15:04 ? 00:00:00 nginx: master process /usr/sbin/nginx
nginx 48338 48337 0 15:04 ? 00:00:00 nginx: worker process
nginx 48339 48337 0 15:04 ? 00:00:00 nginx: worker process
nginx 48340 48337 0 15:04 ? 00:00:00 nginx: worker process
nginx 48341 48337 0 15:04 ? 00:00:00 nginx: worker process
root 48480 14520 0 15:05 pts/1 00:00:00 grep --color=auto nginx