如果一台服务器安装了nginx和apache，我如何找出它用于其网站的服务器？

Question

We have a lot of servers and vhosts and some of them use nignx, some httpd or apache for their domains. I want to write an ansible script that pulls the information out on what web server the vhost uses for its site, the problem is that a lot of them have all 3 web servers installed but only one is actually used for the site to run (others might have an active status).

I mean, I don't even know where to begin. A simple example of a bash script would be nice that accurately outputs the web server of the vhost.

Answer 1

how about checking the ports 80 or 443 which process is using them:

sudo netstat -ntlp | grep '0.0.0.0:80' | awk '{print $7}'

and for port 443:

sudo netstat -ntlp | grep '0.0.0.0:443' | awk '{print $7}'

The output will be one of those lines:

xx/httpd # for apache
xx/nginx # for nginx

And you can write an ansible task to run this cmd

Answer 2

Q: " If a server has nginx and apache installed, how do I find out which one is used for the website? "

A: Given a "website" we know the IP address and port. Then the question is: What daemon is running at www_ip host and www_port?

Let's use lsof and print the first item on the list. The play below (as an example nginx is listening at port 8080)

- hosts: www_ip
  vars:
    www_port: 8080
  tasks:
    - shell: "lsof -i :{{ www_port }}|
              grep LISTEN|
              cut -d ' ' -f 1"
      register: result
    - debug:
        msg: "{{ result.stdout_lines|first }}"

gives

ok: [www_ip] => {
    "msg": "nginx"
}

Notes

• This solution works with Linux.
• A lot of other ideas and comments can be found in Ansible: Check if service is listening on a specific port