resetroot_169route_python3(用于ubuntu16.04)

#!/usr/bin/python3

import os

import sys

import json

import urllib.request

import urllib.parse

import urllib.error

import subprocess

from cloudinit.sources.DataSourceConfigDrive import find_candidate_devs, read_config_drive

from cloudinit.util import mount_cb

def shell(cmd):

    sp = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)

    out, err = sp.communicate()

    return out, err

# Before resetroot, We must ensure if 169.254.169.254 have gateway

for dev in find_candidate_devs():

    results = mount_cb(dev, read_config_drive)

    network_data = results.get("network_config")

    found = dev

    gateways = []

    if found:

        for line in network_data.splitlines():

            if line.startswith("gateway"):

                line = line.strip()

                split_up = line.split(None, 1)

                if len(split_up) <= 1:

                    continue

                gateway = split_up[1]

                gateways.append(gateway)

        break

if gateways:

    gateway = gateways[0]

    cmd = "route add -host 169.254.169.254 gw %s" % gateway

    out,err = shell(cmd)

# To reset password

data = urllib.request.urlopen("http://169.254.169.254/openstack/latest/meta_data.json").read().decode()

json_data = json.loads(data)

print(json_data)

meta = json_data.get("meta")

if meta:

    adminPass =  meta.get("admin_pass")

    if  adminPass:

        os.system("echo 'root:%s' | chpasswd" % adminPass)

        params = urllib.parse.urlencode({"delete":True}).encode(encoding='UTF8')

        f = urllib.request.urlopen("http://169.254.169.254/openstack/latest/password", params)

        f.read()