Hello,
You guys are always so helpful so I thought I'd come here with my
crazy problem I'm trying to solve.
I have a Django Application Cluster. We use subversion for our code.
The only type of a post-commit hook we have is an HTTP Request with
JSON at a URL we define. Essentially what I want to do is to use this
post-commit hook to trigger a cluster-wise reload of the uwsgi
service.
The problem is that I don't really want to implement a fancy script
that uses SSH or anything along those lines. First off, there are
security issues. Secondly, I want it to be relatively quick and
integrated into our app for easy replication as we add and remove
nodes.
I started off with some code -- just trying to play around the idea. I
want to have two views. The first view is titled "svn_hook". This view
is tied to the URL that is called from the post-commit hook by our SVN
Hosting Provider. The second view is titled "uwsgi_reload".
svn_hook()'s job is to simply open a connection with each of the nodes
and call their uwsgi_reload() views. uwsgi_reload()'s job is to simply
execute /etc/init.d/uwsgi... reload.
Unfortunately, I have *no* idea how to get this thing to work. I tried
approaching it with some RPC code in MoinMoin that I was forwarded to
by a nice guy in #wsgi. But, as it turns out, I have no idea what I'm
doing :)
I think if I can get the servers to talk to each other, then I can
handle the rest. If you guys have any ideas on either how to fix this
code, or a better way of approaching this problem, I would really
appreciate the input.
By the way, I understand that WSGI is a completely different protocol
from HTTP. I tried to understand the code the best I could and had no
idea what was going on exactly with the key/value pairs I saw in the
MoinMoin code. Hopefully someone can understand what I was trying to
accomplish there
Thanks again!
-Kurtis
from django.http import HttpResponse
# View for URL Called by SVN on Post-Commit Hook
def svn_hook(request):
# Resources
# import urllib # Used in example code, not here yet...
from httplib import HTTPConnection
# List of IP Addresses to Reload
# <Real IP's Hidden>
hosts = ('192.168.1.1', '192.168.1.2')
port = '7999'
# Hit the Server
"""
Note:
I was going to do more here ... but I can't
even get the thing to work without stalling or throwing
errors. I wanted to check for a 200 Status from each
host and eventually log if any fail.
"""
for host in hosts:
client = HTTPConnection(host, port, False, 30)
client.request("GET", '/reload')
response = client.getresponse()
body = response.read()
body = body.decode('utf-8')
# Done
return HttpResponse(status = 200)
# Temporarily set as /reload for testing purposes.
def uwsgi_reload(request):
# Execute /etc/init.d/uwsgi.... reload
# and any other logic that may need to be performed
# I'll do this later, after I get the actual WSGI call
# working.
return HttpResponse(status = 200)
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