nginx-settings-from-docker-container.py

#!/usr/bin/python3
# Writter by Oskar Hane

import subprocess
import sys
import re

conf_dir = '/etc/nginx/sites-enabled/'
command = ["/usr/bin/docker ps | grep " + sys.argv[1]]
p = subprocess.Popen(command, stdout=subprocess.PIPE, shell=True)
output, err = p.communicate()
d_str = output.decode("utf-8")

ports = re.findall(':([0-9]+)->([0-9]+)', d_str)
domain = re.findall('\s([\S]+)\s*$', d_str)

if not (re.search('(\.[a-z]{2,4})$', domain[0])):
	print('Not a domain')
	exit()

proxy_port = 0
for i in range(len(ports)):
	if(''.join(ports[i][1]) != "80"):
		continue
	proxy_port = ''.join(ports[i][0])
	break

if(proxy_port == 0):
	print('Port 80 not open')
	exit()

f = open(conf_dir + domain[0], 'w+')
f.write('upstream ' + sys.argv[1] + " {\n")
f.write("\tserver 127.0.0.1:" + proxy_port + ";\n}\n")

listen_str = 'server {\n'
listen_str += "\tlisten 80;\n"
listen_str += "\tserver_name " + domain[0] + ";\n"
listen_str += "\tlocation / {\n"
listen_str += "\t\tproxy_pass http://" + sys.argv[1] + ";\n"
listen_str += "\t\tproxy_set_header X-Real-IP $remote_addr;\n"
listen_str += "\t\tproxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;\n"
listen_str += "\t\tproxy_set_header X-NginX-Proxy true;\n"
listen_str += "\t\tproxy_set_header Host $host;\n"
listen_str += "\t\tproxy_redirect off;\n"
listen_str += "\t}\n"
listen_str += "}"
f.write(listen_str)

f.close()