cfg_checker/modules/network/checker.py

import json
import os
import sys
import ipaddress

from copy import deepcopy

from cfg_checker.reports import reporter
from cfg_checker.common import utils, const
from cfg_checker.common import config, logger, logger_cli, pkg_dir
from cfg_checker.common import salt_utils
from cfg_checker.nodes import SaltNodes, node_tmpl


class NetworkChecker(SaltNodes):
    @staticmethod
    def _map_network_for_host(host, if_class, net_list, data):
        if not any(if_class.ip in net for net in net_list.keys()):
            # IP not fits into existing networks
            if if_class.network not in net_list.keys():
                # create subnet key
                net_list[if_class.network] = {}
            # add the host to the dict
            net_list[if_class.network][host] = data
        else:
            # There is a network that ip fits into
            for _net in net_list.keys():
                if if_class.ip in _net:
                    net_list[_net][host] = data

        return net_list

    def collect_network_info(self):
        """
        Collects info on the network using ifs_data.py script

        :return: none
        """
        logger_cli.info("### Collecting network data")
        _result = self.execute_script_on_active_nodes("ifs_data.py", args=["json"])

        for key in self.nodes.keys():
            # due to much data to be passed from salt, it is happening in order
            if key in _result:
                _text = _result[key]
                _dict = json.loads(_text[_text.find('{'):])
                self.nodes[key]['networks'] = _dict
            else:
                self.nodes[key]['networks'] = {}
            logger_cli.debug("# {} has {} networks".format(
                key,
                len(self.nodes[key]['networks'].keys())
            ))
        logger_cli.info("-> done collecting networks data")

        # dump collected data to speed up coding
        # with open('dump.json', 'w+') as ff:
        #     ff.write(json.dumps(self.nodes))

        # load dump data
        # with open('dump.json', 'r') as ff:
        #     _nodes = json.loads(ff.read())

        logger_cli.info("### Building network tree")
        # match interfaces by IP subnets
        _all_nets = {}
        for host, node_data in self.nodes.iteritems():
            for net_name, net_data in node_data['networks'].iteritems():
                # get ips and calculate subnets
                if net_name == 'lo':
                    # skip the localhost
                    continue
                _ip4s = net_data['ipv4']
                for _ip_str in _ip4s.keys():
                     # create interface class
                    _if = ipaddress.IPv4Interface(_ip_str)
                    net_data['name'] = net_name
                    net_data['if'] = _if

                    _all_nets = self._map_network_for_host(
                        host,
                        _if,
                        _all_nets,
                        net_data
                    )

        # save collected info
        self.all_networks = _all_nets


    def collect_reclass_networks(self):
        # Get networks from reclass and mark them
        _reclass_nets = {}
        # Get required pillars
        self.get_specific_pillar_for_nodes("linux:network")
        for node in self.nodes.keys():
            _pillar = self.nodes[node]['pillars']['linux']['network']['interface']
            for _if_name, _if_data in _pillar.iteritems():
                if 'address' in _if_data:
                    _if = ipaddress.IPv4Interface(
                        _if_data['address'] + '/' + _if_data['netmask']
                    )
                    _if_data['name'] = _if_name
                    _if_data['if'] = _if

                    _reclass_nets = self._map_network_for_host(
                        node,
                        _if,
                        _reclass_nets,
                        _if_data
                    )

        self.reclass_nets = _reclass_nets


    def print_network_report(self):
        """
        Create text report for CLI

        :return: none
        """
        for network, nodes in self.all_networks.iteritems():
            logger_cli.info("-> {}".format(str(network)))
            names = sorted(nodes.keys())

            for hostname in names:
                _text = "{0:30}: {1:19} {2:5} {3:4}".format(
                    nodes[hostname]['name'],
                    str(nodes[hostname]['if'].ip),
                    nodes[hostname]['mtu'],
                    nodes[hostname]['state']
                )
                logger_cli.info(
                    "\t{0:10} {1}".format(hostname.split('.')[0], _text)
                )
    
    def create_html_report(self, filename):
        """
        Create static html showing network schema-like report

        :return: none
        """
        logger_cli.info("### Generating report to '{}'".format(filename))
        _report = reporter.ReportToFile(
            reporter.HTMLNetworkReport(),
            filename
        )
        _report({
            "nodes": self.nodes,
            "diffs": {}
        })
        logger_cli.info("-> Done")