而且此处我们可以写成变量的形式，首先，我们用ansible的setup模块取出VCPU的表示
[root@ceshi ansible]# ansible -i hosts ceshi -m setup |grep "processor"
"ansible_processor": [
"ansible_processor_cores": 1,
"ansible_processor_count": 4,
"ansible_processor_threads_per_core": 1,
"ansible_processor_vcpus": 4,

然后修改 worker_processes auto; ------> worker_processes {{ ansible_processor_vcpus*2 }}; ###nginx进程数乘以2
修改完模板后，由于我们之前都已经装过包了，所以我们需要再次修改我们的playbook
---
- hosts: ceshi
remote_user: root

tasks:
- name: install package
yum: name=nginx
- name: copy template
template: src=nginx.conf.j2 dest=/etc/nginx/nginx.conf
notif: restart service
- name: start service
service: name=nginx state=started enabled=yes
handlers：
- name: restart service
service: name=nginx state=restarted