fix_bad_tags.py

#!/usr/bin/python

import subprocess
import json
import sys

def deugly(obj):
        try:
                ret = {}
                for elem in  obj[1]:
                        ret[elem[0]] = elem[1]
                return ret
        except:
                return obj

j = json.loads(subprocess.check_output(['ovs-vsctl', '--format=json', '--data=json',  'list', 'port']))
data = j['data']
headings = j['headings']
other_config = headings.index('other_config')
tag = headings.index('tag')
name = headings.index('name')
uuid = headings.index('_uuid')

def fix(name, uuid, old_tag, new_tag):
        print "Replacing old tag {old} to new tag {new} for port {uuid} with name {name}".format(
                name=name,
                uuid=uuid,
                old=old_tag,
                new=new_tag
        )
        if '--fix' in sys.argv:
                cmd = ['ovs-vsctl', 'set', 'port', uuid, 'tag=%s' % new_tag]
        else:
                cmd = ['echo', 'ovs-vsctl', 'set', 'port', uuid, 'tag=%s' % new_tag]
        print cmd
        print subprocess.check_output(cmd)

for obj in data:
        cfg = deugly(obj[other_config])
        try:
                if str(cfg['tag']) != str(obj[tag]):
                        fix(obj[name], obj[uuid][1], obj[tag], cfg['tag'])
        except KeyError:
                #print "keyerror", obj[name]
                pass