Send wsrep / galera notifications for mysql clusters to a slack.com webhook

wsrep_notify_slack

#!/usr/bin/env python

# configure this in my.cnf on a Galera-based MySQL-alike server:
#   wsrep_notify_cmd=/usr/local/sbin/wsrep_notify_slack

# by Tom Gidden <gid@starberry.tv>

url = 'https://hooks.slack.com/services/XXXXXXX/XXXXXXXX/XXXXXXXX'

import argparse
import urllib, urllib2
import socket
import json
import re

if __name__ == '__main__':
    parser = argparse.ArgumentParser()
    parser.add_argument('-s', '--status')
#    parser.add_argument('-u', '--uuid')
#    parser.add_argument('-p', '--primary')
#    parser.add_argument('-i', '--index')
#    parser.add_argument('-m', '--members')
    args = parser.parse_args()

    name = socket.gethostname()
    shortname = re.sub(r'\..*$', '', name)

    text = "*"+shortname+"* status changed to *"+args.status+"*"

    q = {}
    q['username'] = "Database node "+shortname

    colors = {
        'Joined' : 'warning',
        'Synced' : 'good',
        'Undefined' : 'danger',
        'Joiner' : 'warning',
        'Donor' : 'warning'
    }

    a = {}
    a["fallback"] = "Cluster change notification: "+text
    a["text"] = text
    a["mrkdwn_in"] = ["text", "fallback"]

    if args.status in colors:
        a['color'] = colors[args.status]
    else:
        a['color'] = 'danger'

    q['attachments'] = [ a ]
    enc = "payload="+json.dumps(q)

    urllib2.urlopen(url, enc)

Thanks for this - very helpful.

This causes unknown parameter errors though; the uuid, primary, index and members params should be included (uncommented) even if they're not used.