How to efficiently delete a node from LTM?

how about multi servers in the upstream? The real case would be let F5 get the real count number of "up" server, and mark the nginx(revers proxy one) as down if the "up" less than x.

an example

#!/usr/bin/python
# -*- coding: UTF-8 -*-
 
import sys
import urllib2
import json
 
def get_nginxapi(url):
    ct_headers = {'Content-type':'application/json'}
    request = urllib2.Request(url,headers=ct_headers)
    response = urllib2.urlopen(request)
    html = response.read()
    return html
 
api = sys.argv[3]
 
try:
    data = get_nginxapi(api)
    data = json.loads(data)
except:
    data = ''
m = 0
lowwater = int(sys.argv[4])
try:
    for peer in data['peers']:
        state = peer['state']
        if state == 'up':
            m = m + 1
except:
    m = 0
#print data['peers'][]['state']
#print m
if m >= lowwater:
    print 'UP'

 very nice! I have another blog post coming up that is similar in idea. The basic idea is to collect the number of available upstreams and use that as information to update the BIG-IP. The article uses NGINX JavaScript (NJS) to do the lookup on NGINX (vs. externally via Python). Once the article is posted; I'll post the link here.

I am very care your any post. Do post here or share in Team. Remembered you have a concept word that describe this about using njs.

  here's the article that I mentioned earlier: https://www.nginx.com/blog/just-one-post-declarative-dns-with-f5-and-nginx-javascript/

  Great post. Will you consider to invoke the update URI once nginx find there is new app status change?