diff --git a/cfg_checker/__init__.py b/cfg_checker/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/cfg_checker/__init__.py
diff --git a/cfg_checker/cfg_check.py b/cfg_checker/cfg_check.py
new file mode 100644
index 0000000..9260f30
--- /dev/null
+++ b/cfg_checker/cfg_check.py
@@ -0,0 +1,112 @@
+import argparse
+import os
+import sys
+
+import reporter
+from cfg_checker.common import utils, const
+from cfg_checker.common import config, logger, logger_cli, pkg_dir
+from cfg_checker.clients import salt
+
+from cfg_checker.pkg_check import CloudPackageChecker
+
+pkg_dir = os.path.dirname(__file__)
+pkg_dir = os.path.normpath(pkg_dir)
+
+
+class MyParser(argparse.ArgumentParser):
+    def error(self, message):
+        sys.stderr.write('Error: {0}\n\n'.format(message))
+        self.print_help()
+
+
+
+def help_message():
+    print"""
+    Please, use following examples to generate info reports:\n
+         cfg_checker packages report\n
+         cfg_checker network check\n
+         cfg_checker network report\n
+    """
+    return
+
+def pkg_check(args):
+    # create package versions report
+    _filename = args.file
+    # init connection to salt and collect minion data
+    pChecker = CloudPackageChecker()
+    # collect data on installed packages
+    pChecker.collect_installed_packages()
+    # diff installed and candidates
+    # pChecker.collect_packages()
+    # report it
+    pChecker.create_html_report(_filename)
+
+
+def net_check(args):
+    print("This is net check routine")
+
+    return
+
+
+def net_report(args):
+    print("This is net check routine")
+
+    return
+
+
+def config_check_entrypoint():
+    # Main entrypointр
+    parser = MyParser(prog="Cloud configuration checker")
+    subparsers = parser.add_subparsers(dest='command')
+    # packages
+    pkg_parser = subparsers.add_parser(
+        'packages',
+        help="Package versions check (Candidate vs Installed)"
+    )
+    pkg_subparsers = pkg_parser.add_subparsers(dest='type')
+
+    pkg_report_parser = pkg_subparsers.add_parser(
+        'report',
+        help="Report package versions to HTML file"
+    )
+    pkg_report_parser.add_argument(
+        '-f',
+        '--file',
+        help="HTML filename to save report"
+    )
+
+    # networking
+    net_parser = subparsers.add_parser(
+        'network',
+        help="Network infrastructure checks"
+    )
+    net_subparsers = net_parser.add_subparsers(dest='type')
+
+    net_check_parser = net_subparsers.add_parser(
+        'check',
+        help="Do network check and print the result"
+    )
+    net_check_parser.set_defaults(func=net_check)
+
+    net_report_parser = net_subparsers.add_parser(
+        'report',
+        help="Generate network check report"
+    )
+    net_report_parser.add_argument(
+        '-f',
+        '--file',
+        help="HTML filename to save report"
+    )
+    net_report_parser.set_defaults(func=net_report)
+    
+    #parse arguments
+    args = parser.parse_args()
+
+    # Execute the command
+    result = args.func(args)
+
+    logger.debug(result)
+    return
+
+if __name__ == '__main__':
+    config_check_entrypoint()
diff --git a/cfg_checker/clients/__init__.py b/cfg_checker/clients/__init__.py
new file mode 100644
index 0000000..3e1f55c
--- /dev/null
+++ b/cfg_checker/clients/__init__.py
@@ -0,0 +1,29 @@
+from cfg_checker.common.salt_utils import SaltRemote
+from cfg_checker.common import logger
+
+# instance of the salt client
+salt = None
+
+
+def get_salt_remote(config):
+    """Singleton-like creation of instance
+
+    Arguments:
+        config {base_config} -- an instance to base_config
+            with creds and params
+
+    Returns:
+        SaltRemote -- instance of salt client
+    """
+
+    global salt
+    logger.info("Creating salt remote instance")
+    # create it once
+    if salt is None:
+        salt = SaltRemote(config)
+        # do most expensive operation with no strict timeout possible
+        # all nodes that answer ping
+        salt.nodes_active = salt.get_active_nodes()
+
+    # return once required
+    return salt
diff --git a/cfg_checker/common/__init__.py b/cfg_checker/common/__init__.py
new file mode 100644
index 0000000..297ace6
--- /dev/null
+++ b/cfg_checker/common/__init__.py
@@ -0,0 +1,13 @@
+import os
+import const
+
+from settings import pkg_dir, config
+from other import Utils
+from log import logger, logger_cli
+
+
+utils = Utils()
+const = const
+logger = logger
+logger_cli = logger_cli
+config = config
\ No newline at end of file
diff --git a/cfg_checker/common/const.py b/cfg_checker/common/const.py
new file mode 100644
index 0000000..4142ea7
--- /dev/null
+++ b/cfg_checker/common/const.py
@@ -0,0 +1,32 @@
+"""Constants that is not to be changed and used in all other files
+"""
+
+from __future__ import print_function, absolute_import
+
+import itertools
+
+_cnt = itertools.count()
+NODE_DOWN = next(_cnt)
+NODE_UP = next(_cnt)
+
+del _cnt
+
+all_roles_map = {
+    "apt": "repository",
+    "bmk": "validation",
+    "cfg": "master",
+    "cid": "cicd",
+    "cmn": "storage_monitor",
+    "cmp": "compute",
+    "ctl": "openstack_controller",
+    "dbs": "database",
+    "gtw": "openstack_gateway",
+    "kvm": "foundation",
+    "log": "stacklight_logger",
+    "mon": "monitoring",
+    "msg": "messaging",
+    "mtr": "stacklight_metering",
+    "osd": "storage_node",
+    "prx": "proxy",
+    "rgw": "storage_rados"
+}
diff --git a/cfg_checker/common/exception.py b/cfg_checker/common/exception.py
new file mode 100644
index 0000000..bc7cefe
--- /dev/null
+++ b/cfg_checker/common/exception.py
@@ -0,0 +1,21 @@
+from exceptions import Exception
+
+
+class CheckerBaseExceptions(Exception):
+    pass
+
+
+class CheckerException(CheckerBaseExceptions):
+    def __init__(self, message, *args, **kwargs):
+        super(CheckerException, self).__init__(message, *args, **kwargs)
+        # get the trace
+        # TODO: get and log traceback
+
+        # prettify message
+        self.message = "CheckerException: {}".format(message)
+
+
+class ConfigException(CheckerException):
+    def __init__(self, message, *args, **kwargs):
+        super(ConfigException, self).__init__(message, *args, **kwargs)
+        self.message = "Configuration error: {}".format(message)
diff --git a/cfg_checker/common/log.py b/cfg_checker/common/log.py
new file mode 100644
index 0000000..af52cac
--- /dev/null
+++ b/cfg_checker/common/log.py
@@ -0,0 +1,95 @@
+import os
+import logging
+
+pkg_dir = os.path.dirname(__file__)
+pkg_dir = os.path.join(pkg_dir, os.pardir, os.pardir)
+pkg_dir = os.path.normpath(pkg_dir)
+pkg_dir = os.path.abspath(pkg_dir)
+
+
+def color_me(color):
+    RESET_SEQ = "\033[0m"
+    COLOR_SEQ = "\033[1;%dm"
+
+    color_seq = COLOR_SEQ % (30 + color)
+
+    def closure(msg):
+        return color_seq + msg + RESET_SEQ
+    return closure
+
+
+class ColoredFormatter(logging.Formatter):
+    BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE = range(8)
+
+    colors = {
+        'INFO': color_me(WHITE),
+        'WARNING': color_me(YELLOW),
+        'DEBUG': color_me(BLUE),
+        'CRITICAL': color_me(YELLOW),
+        'ERROR': color_me(RED)
+    }
+
+    def __init__(self, msg, use_color=True, datefmt=None):
+        logging.Formatter.__init__(self, msg, datefmt=datefmt)
+        self.use_color = use_color
+
+    def format(self, record):
+        orig = record.__dict__
+        record.__dict__ = record.__dict__.copy()
+        levelname = record.levelname
+
+        prn_name = levelname + ' ' * (8 - len(levelname))
+        if levelname in self.colors:
+            record.levelname = self.colors[levelname](prn_name)
+        else:
+            record.levelname = prn_name
+
+        # super doesn't work here in 2.6 O_o
+        res = logging.Formatter.format(self, record)
+
+        # res = super(ColoredFormatter, self).format(record)
+
+        # restore record, as it will be used by other formatters
+        record.__dict__ = orig
+        return res
+
+
+def setup_loggers(name, def_level=logging.DEBUG, log_fname=None):
+
+    # Stream Handler
+    sh = logging.StreamHandler()
+    sh.setLevel(def_level)
+    log_format = '%(message)s'
+    colored_formatter = ColoredFormatter(log_format, datefmt="%H:%M:%S")
+    sh.setFormatter(colored_formatter)
+
+    # File handler
+    if log_fname is not None:
+        fh = logging.FileHandler(log_fname)
+        log_format = '%(asctime)s - %(levelname)8s - %(name)-15s - %(message)s'
+        formatter = logging.Formatter(log_format, datefmt="%H:%M:%S")
+        fh.setFormatter(formatter)
+        fh.setLevel(logging.DEBUG)
+    else:
+        fh = None
+
+    logger = logging.getLogger(name)
+    logger.setLevel(logging.DEBUG)
+    if len(logger.handlers) == 0:
+        logger.addHandler(fh)
+
+    logger_cli = logging.getLogger(name + ".cli")
+    logger_cli.setLevel(logging.DEBUG)
+    if len(logger_cli.handlers) == 0:
+        logger_cli.addHandler(sh)
+
+    return logger, logger_cli
+
+# init instances of logger to be used by all other modules
+logger, logger_cli = setup_loggers(
+    'cfg_checker',
+    log_fname=os.path.join(
+        pkg_dir,
+        os.getenv('LOGFILE', 'cfg_checker.log')
+    )
+)
diff --git a/cfg_checker/common/other.py b/cfg_checker/common/other.py
new file mode 100644
index 0000000..97030bb
--- /dev/null
+++ b/cfg_checker/common/other.py
@@ -0,0 +1,99 @@
+import os
+import re
+
+from cfg_checker.common.const import all_roles_map
+
+from cfg_checker.common.exception import ConfigException
+
+pkg_dir = os.path.dirname(__file__)
+pkg_dir = os.path.join(pkg_dir, os.pardir, os.pardir)
+pkg_dir = os.path.normpath(pkg_dir)
+pkg_dir = os.path.abspath(pkg_dir)
+
+
+class Utils(object):
+    @staticmethod
+    def validate_name(fqdn, message=False):
+        """
+        Function that tries to validate node name.
+        Checks if code contains letters, has '.' in it,
+        roles map contains code's role
+
+        :param fqdn: node FQDN name to supply for the check
+        :param message: True if validate should return error check message
+        :return: False if checks failed, True if all checks passed
+        """
+        _message = "Validation passed"
+
+        def _result():
+            return (True, _message) if message else True
+
+        # node role code checks
+        _code = re.findall("[a-zA-Z]+", fqdn.split('.')[0])
+        if len(_code) > 0:
+            if _code[0] in all_roles_map:
+                return _result()
+            else:
+                # log warning here
+                _message = "Node code is unknown, '{}'. " \
+                           "Please, update map".format(_code)
+        else:
+            # log warning here
+            _message = "Node name is invalid, '{}'".format(fqdn)
+
+        # put other checks here
+
+        # output result
+        return _result()
+
+    @staticmethod
+    def node_string_to_list(node_string):
+        # supplied var should contain node list
+        # if there is no ',' -> use space as a delimiter
+        if node_string is not None:
+            if node_string.find(',') < 0:
+                return node_string.split(' ')
+            else:
+                return node_string.split(',')
+        else:
+            return []
+
+    def get_node_code(self, fqdn):
+        # validate
+        _isvalid, _message = self.validate_name(fqdn, message=True)
+        _code = re.findall("[a-zA-Z]+", fqdn.split('.')[0])
+        # check if it is valid and raise if not
+        if _isvalid:
+            return _code[0]
+        else:
+            raise ConfigException(_message)
+
+    def get_nodes_list(self, env, nodes_list):
+        _list = []
+        if env is None:
+            # nothing supplied, use the one in repo
+            try:
+                if not nodes_list:
+                    return []
+                with open(os.path.join(pkg_dir, nodes_list)) as _f:
+                    _list.extend(_f.read().splitlines())
+            except IOError as e:
+                raise ConfigException("Error while loading file, '{}': "
+                                      "{}".format(e.filename, e.strerror))
+        else:
+            _list.extend(self.node_string_to_list(env))
+
+        # validate names
+        _invalid = []
+        _valid = []
+        for idx in range(len(_list)):
+            _name = _list[idx]
+            if not self.validate_name(_name):
+                _invalid.append(_name)
+            else:
+                _valid.append(_name)
+
+        return _valid
+
+
+utils = Utils()
diff --git a/cfg_checker/common/salt_utils.py b/cfg_checker/common/salt_utils.py
new file mode 100644
index 0000000..ba1233b
--- /dev/null
+++ b/cfg_checker/common/salt_utils.py
@@ -0,0 +1,371 @@
+"""
+Module to handle interaction with salt
+"""
+import os
+import requests
+import time
+
+from cfg_checker.common import logger, config
+
+
+def list_to_target_string(node_list, separator):
+    result = ''
+    for node in node_list:
+        result += node + ' ' + separator + ' '
+    return result[:-(len(separator)+2)]
+
+
+class SaltRest(object):
+    _host = config.salt_host
+    _port = config.salt_port
+    uri = "http://" + config.salt_host + ":" + config.salt_port
+    _auth = {}
+
+    default_headers = {
+        'Accept': 'application/json',
+        'Content-Type': 'application/json',
+        'X-Auth-Token': None
+    }
+
+    def __init__(self):
+        self._token = self._login()
+        self.last_response = None
+
+    def get(self, path='', headers=default_headers, cookies=None):
+        _path = os.path.join(self.uri, path)
+        logger.debug("GET '{}'\nHeaders: '{}'\nCookies: {}".format(
+            _path,
+            headers,
+            cookies
+        ))
+        return requests.get(
+            _path,
+            headers=headers,
+            cookies=cookies
+        )
+
+    def post(self, data, path='', headers=default_headers, cookies=None):
+        if data is None:
+            data = {}
+        _path = os.path.join(self.uri, path)
+        if path == 'login':
+            _data = str(data).replace(config.salt_pass, "*****")
+        else:
+            _data = data
+        logger.debug("POST '{}'\nHeaders: '{}'\nCookies: {}\nBody: {}".format(
+            _path,
+            headers,
+            cookies,
+            _data
+        ))
+        return requests.post(
+            os.path.join(self.uri, path),
+            headers=headers,
+            json=data,
+            cookies=cookies
+        )
+
+    def _login(self):
+        login_payload = {
+            'username': config.salt_user,
+            'password': config.salt_pass,
+            'eauth': 'pam'
+        }
+
+        logger.debug("Logging in to salt master...")
+        _response = self.post(login_payload, path='login')
+
+        if _response.ok:
+            self._auth['response'] = _response.json()['return'][0]
+            self._auth['cookies'] = _response.cookies
+            self.default_headers['X-Auth-Token'] = \
+                self._auth['response']['token']
+            return self._auth['response']['token']
+        else:
+            raise EnvironmentError(
+                "HTTP:{}, Not authorized?".format(_response.status_code)
+            )
+
+    def salt_request(self, fn, *args, **kwargs):
+        # if token will expire in 5 min, re-login
+        if self._auth['response']['expire'] < time.time() + 300:
+            self._auth['response']['X-Auth-Token'] = self._login()
+
+        _method = getattr(self, fn)
+        _response = _method(*args, **kwargs)
+        self.last_response = _response
+        _content = "..."
+        _len = len(_response.content)
+        if _len < 1024:
+            _content = _response.content
+        logger.debug(
+            "Response (HTTP {}/{}), {}: {}".format(
+                _response.status_code,
+                _response.reason,
+                _len,
+                _content
+            )
+        )
+        if _response.ok:
+            return _response.json()['return']
+        else:
+            raise EnvironmentError(
+                "Salt Error: HTTP:{}, '{}'".format(
+                    _response.status_code,
+                    _response.reason
+                )
+            )
+
+
+class SaltRemote(SaltRest):
+    def __init__(self):
+        super(SaltRemote, self).__init__()
+
+    def cmd(
+            self,
+            tgt,
+            fun,
+            param=None,
+            client='local',
+            kwarg=None,
+            expr_form=None,
+            tgt_type=None,
+            timeout=None
+    ):
+        _timeout = timeout if timeout is not None else config.salt_timeout
+        _payload = {
+            'fun': fun,
+            'tgt': tgt,
+            'client': client,
+            'timeout': _timeout
+        }
+
+        if expr_form:
+            _payload['expr_form'] = expr_form
+        if tgt_type:
+            _payload['tgt_type'] = tgt_type
+        if param:
+            _payload['arg'] = param
+        if kwarg:
+            _payload['kwarg'] = kwarg
+
+        _response = self.salt_request('post', [_payload])
+        if isinstance(_response, list):
+            return _response[0]
+        else:
+            raise EnvironmentError(
+                "Unexpected response from from salt-api/LocalClient: "
+                "{}".format(_response)
+            )
+
+    def run(self, fun, kwarg=None):
+        _payload = {
+            'client': 'runner',
+            'fun': fun,
+            'timeout': config.salt_timeout
+        }
+
+        if kwarg:
+            _payload['kwarg'] = kwarg
+
+        _response = self.salt_request('post', [_payload])
+        if isinstance(_response, list):
+            return _response[0]
+        else:
+            raise EnvironmentError(
+                "Unexpected response from from salt-api/RunnerClient: "
+                "{}".format(_response)
+            )
+
+    def wheel(self, fun, arg=None, kwarg=None):
+        _payload = {
+            'client': 'wheel',
+            'fun': fun,
+            'timeout': config.salt_timeout
+        }
+
+        if arg:
+            _payload['arg'] = arg
+        if kwarg:
+            _payload['kwarg'] = kwarg
+
+        _response = self.salt_request('post', _payload)['data']
+        if _response['success']:
+            return _response
+        else:
+            raise EnvironmentError(
+                "Salt Error: '{}'".format(_response['return']))
+
+    def pillar_request(self, node_target, pillar_submodule, argument):
+        # example cli: 'salt "ctl01*" pillar.keys rsyslog'
+        _type = "compound"
+        if isinstance(node_target, list):
+            _type = "list"
+        return self.cmd(
+            node_target,
+            "pillar." + pillar_submodule,
+            argument,
+            expr_form=_type
+        )
+
+    def pillar_keys(self, node_target, argument):
+        return self.pillar_request(node_target, 'keys', argument)
+
+    def pillar_get(self, node_target, argument):
+        return self.pillar_request(node_target, 'get', argument)
+
+    def pillar_data(self, node_target, argument):
+        return self.pillar_request(node_target, 'data', argument)
+
+    def pillar_raw(self, node_target, argument):
+        return self.pillar_request(node_target, 'raw', argument)
+
+    def list_minions(self):
+        """
+            Fails in salt version 2016.3.8
+            api returns dict of minions with grains
+        """
+        return self.salt_request('get', 'minions')
+
+    def list_keys(self):
+        """
+            Fails in salt version 2016.3.8
+            api should return dict:
+            {
+                'local': [],
+                'minions': [],
+                'minions_denied': [],
+                'minions_pre': [],
+                'minions_rejected': [],
+            }
+        """
+        return self.salt_request('get', path='keys')
+
+    def get_status(self):
+        """
+            'runner' client is the equivalent of 'salt-run'
+            Returns the
+        """
+        return self.run(
+            'manage.status',
+            kwarg={'timeout': 10}
+        )
+
+    def get_active_nodes(self):
+        if config.skip_nodes:
+            logger.info("Nodes to be skipped: {0}".format(config.skip_nodes))
+            return self.cmd(
+                '* and not ' + list_to_target_string(
+                    config.skip_nodes,
+                    'and not'
+                ),
+                'test.ping',
+                expr_form='compound')
+        else:
+            return self.cmd('*', 'test.ping')
+
+    def get_monitoring_ip(self, param_name):
+        salt_output = self.cmd(
+            'docker:client:stack:monitoring',
+            'pillar.get',
+            param=param_name,
+            expr_form='pillar')
+        return salt_output[salt_output.keys()[0]]
+
+    def f_touch_master(self, path, makedirs=True):
+        _kwarg = {
+            "makedirs": makedirs
+        }
+        salt_output = self.cmd(
+            "cfg01*",
+            "file.touch",
+            param=path,
+            kwarg=_kwarg
+        )
+        return salt_output[salt_output.keys()[0]]
+
+    def f_append_master(self, path, strings_list, makedirs=True):
+        _kwarg = {
+            "makedirs": makedirs
+        }
+        _args = [path]
+        _args.extend(strings_list)
+        salt_output = self.cmd(
+            "cfg01*",
+            "file.write",
+            param=_args,
+            kwarg=_kwarg
+        )
+        return salt_output[salt_output.keys()[0]]
+
+    def mkdir(self, target, path, tgt_type=None):
+        salt_output = self.cmd(
+            target,
+            "file.mkdir",
+            param=path,
+            expr_form=tgt_type
+        )
+        return salt_output
+
+    def f_manage_file(self, target_path, source,
+                      sfn='', ret='{}',
+                      source_hash={},
+                      user='root', group='root', backup_mode='755',
+                      show_diff='base',
+                      contents='', makedirs=True):
+        """
+        REST variation of file.get_managed
+        CLI execution goes like this (10 agrs):
+        salt cfg01\* file.manage_file /root/test_scripts/pkg_versions.py
+        '' '{}' /root/diff_pkg_version.py
+        '{hash_type: 'md5', 'hsum': <md5sum>}' root root '755' base ''
+        makedirs=True
+            param: name - target file placement when managed
+            param: source - source for the file
+        """
+        _source_hash = {
+            "hash_type": "md5",
+            "hsum": 000
+        }
+        _arg = [
+            target_path,
+            sfn,
+            ret,
+            source,
+            _source_hash,
+            user,
+            group,
+            backup_mode,
+            show_diff,
+            contents
+        ]
+        _kwarg = {
+            "makedirs": makedirs
+        }
+        salt_output = self.cmd(
+            "cfg01*",
+            "file.manage_file",
+            param=_arg,
+            kwarg=_kwarg
+        )
+        return salt_output[salt_output.keys()[0]]
+
+    def cache_file(self, target, source_path):
+        salt_output = self.cmd(
+            target,
+            "cp.cache_file",
+            param=source_path
+        )
+        return salt_output[salt_output.keys()[0]]
+
+    def get_file(self, target, source_path, target_path, tgt_type=None):
+        return self.cmd(
+            target,
+            "cp.get_file",
+            param=[source_path, target_path],
+            expr_form=tgt_type
+        )
+
+    @staticmethod
+    def compound_string_from_list(nodes_list):
+        return " or ".join(nodes_list)
diff --git a/cfg_checker/common/settings.py b/cfg_checker/common/settings.py
new file mode 100644
index 0000000..cea1f0c
--- /dev/null
+++ b/cfg_checker/common/settings.py
@@ -0,0 +1,107 @@
+import os
+
+from exception import ConfigException
+from log import logger
+from other import utils
+
+pkg_dir = os.path.dirname(__file__)
+pkg_dir = os.path.join(pkg_dir, os.pardir, os.pardir)
+pkg_dir = os.path.normpath(pkg_dir)
+pkg_dir = os.path.abspath(pkg_dir)
+
+_default_work_folder = os.path.normpath(pkg_dir)
+
+
+class CheckerConfiguration(object):
+    def _init_values(self):
+        """Load values from environment variables or put default ones
+        """
+
+        self.name = "CheckerConfig"
+        self.working_folder = os.environ.get(
+            'CFG_TESTS_WORK_DIR',
+            _default_work_folder
+        )
+        self.date_format = "%Y-%m-%d %H:%M:%S.%f%z"
+        self.default_tz = "UTC"
+
+        self.salt_host = os.environ.get('SALT_URL', None)
+        self.salt_port = os.environ.get('SALT_PORT', '6969')
+        self.salt_user = os.environ.get('SALT_USER', 'salt')
+        self.salt_pass = os.environ.get('SALT_PASSWORD', None)
+        self.salt_timeout = os.environ.get('SALT_TIMEOUT', 30)
+        self.salt_file_root = os.environ.get('SALT_FILE_ROOT', None)
+        self.salt_scripts_folder = os.environ.get(
+            'SALT_SCRIPTS_FOLDER',
+            'cfg_checker_scripts'
+        )
+        self.all_nodes = utils.get_nodes_list(
+            os.environ.get('CFG_ALL_NODES', None),
+            os.environ.get('SALT_NODE_LIST_FILE', None)
+        )
+        self.skip_nodes = utils.node_string_to_list(os.environ.get(
+            'CFG_SKIP_NODES',
+            None
+        ))
+
+    @staticmethod
+    def _init_env(env_name=None):
+        """[summary]
+
+        Keyword Arguments:
+            env_name {str} -- environment name to search configuration
+                files in etc/<env_name>.env (default: {None})
+
+        Raises:
+            ConfigException -- on IO error when loading env file
+            ConfigException -- on env file failed validation
+        """
+        # load env file as init os.environment with its values
+        if env_name is None:
+            _env_name = 'default'
+        else:
+            _env_name = env_name
+        _config_path = os.path.join(pkg_dir, 'etc', _env_name + '.env')
+        if os.path.isfile(_config_path):
+            with open(_config_path) as _f:
+                _list = _f.read().splitlines()
+            logger.debug("Loading env vars from '{}'".format(_config_path))
+        else:
+            raise ConfigException(
+                "Failed to load enviroment vars from '{}'".format(
+                    _config_path
+                )
+            )
+        for index in range(len(_list)):
+            _line = _list[index]
+            # skip comments
+            if _line.strip().startswith('#'):
+                continue
+            # validate
+            _errors = []
+            if _line.find('=') < 0 or _line.count('=') > 1:
+                _errors.append("Line {}: {}".format(index, _line))
+            else:
+                # save values
+                _t = _line.split('=')
+                _key, _value = _t[0], _t[1]
+                os.environ[_key] = _value
+        # if there was errors, report them
+        if _errors:
+            raise ConfigException(
+                "Environment file failed validation in lines: {}".format(
+                    "\n".join(_errors)
+                )
+            )
+        else:
+            logger.debug("Loaded total of '{}' vars".format(len(_list)))
+
+    def __init__(self):
+        """Base configuration class. Only values that are common for all scripts
+        """
+        _env = os.getenv('SALT_ENV', None)
+        self._init_env(_env)
+        self._init_values()
+
+
+config = CheckerConfiguration()
diff --git a/cfg_checker/pkg_check.py b/cfg_checker/pkg_check.py
new file mode 100644
index 0000000..34907c5
--- /dev/null
+++ b/cfg_checker/pkg_check.py
@@ -0,0 +1,189 @@
+import json
+import os
+import sys
+
+from copy import deepcopy
+
+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
+
+node_tmpl = {
+    'role': '',
+    'node_group': '',
+    'status': const.NODE_DOWN,
+    'pillars': {},
+    'grains': {}
+}
+
+
+class CloudPackageChecker(object):
+    _config = config
+
+    def __init__(self):
+        logger_cli.info("Collecting nodes for package check")
+        # simple salt rest client
+        self.salt = salt_utils.SaltRemote()
+
+        # Keys for all nodes
+        # this is not working in scope of 2016.8.3, will overide with list
+        # cls.node_keys = cls.salt.list_keys()
+
+        logger_cli.info("Collecting node names existing in the cloud")
+        self.node_keys = {
+            'minions': base_config.all_nodes
+        }
+
+        # all that answer ping
+        _active = self.salt.get_active_nodes()
+        logger_cli.info("Nodes responded: {}".format(_active))
+        # just inventory for faster interaction
+        # iterate through all accepted nodes and create a dict for it
+        self.nodes = {}
+        for _name in self.node_keys['minions']:
+            _nc = utils.get_node_code(_name)
+            _rmap = const.all_roles_map
+            _role = _rmap[_nc] if _nc in _rmap else 'unknown'
+            _status = const.NODE_UP if _name in _active else const.NODE_DOWN
+
+            self.nodes[_name] = deepcopy(node_tmpl)
+            self.nodes[_name]['node_group'] = _nc
+            self.nodes[_name]['role'] = _role
+            self.nodes[_name]['status'] = _status
+
+        logger_cli.info("{} nodes collected".format(len(self.nodes)))
+
+    def collect_installed_packages(self):
+        """
+        Collect installed packages on each node
+        sets 'installed' dict property in the class
+
+        :return: none
+        """
+        logger_cli.info("Collecting installed packages")
+        # form an all nodes compound string to use in salt
+        _active_nodes_string = self.salt.compound_string_from_list(
+            filter(
+                lambda nd: self.nodes[nd]['status'] == const.NODE_UP,
+                self.nodes
+            )
+        )
+        # Prepare script
+        _script_filename = "pkg_versions.py"
+        _p = os.path.join(PKG_DIR, 'scripts', _script_filename)
+        with open(_p, 'rt') as fd:
+            _script = fd.read().splitlines()
+        _storage_path = os.path.join(
+            base_config.salt_file_root, base_config.salt_scripts_folder
+        )
+        logger_cli.info(
+            "Uploading script {} to master's file cache folder: '{}'".format(
+                _script_filename,
+                _storage_path
+            )
+        )
+        _result = self.salt.mkdir("cfg01*", _storage_path)
+        # Form cache, source and target path
+        _cache_path = os.path.join(_storage_path, _script_filename)
+        _source_path = os.path.join(
+            'salt://',
+            base_config.salt_scripts_folder,
+            _script_filename
+        )
+        _target_path = os.path.join(
+            '/root',
+            base_config.salt_scripts_folder,
+            _script_filename
+        )
+
+        logger.debug("Creating file in cache '{}'".format(_cache_path))
+        _result = self.salt.f_touch_master(_cache_path)
+        _result = self.salt.f_append_master(_cache_path, _script)
+        # command salt to copy file to minions
+        logger.debug("Creating script target folder '{}'".format(_cache_path))
+        _result = self.salt.mkdir(
+            _active_nodes_string,
+            os.path.join(
+                '/root',
+                base_config.salt_scripts_folder
+            ),
+            tgt_type="compound"
+        )
+        logger_cli.info("Running script to all active nodes")
+        _result = self.salt.get_file(
+            _active_nodes_string,
+            _source_path,
+            _target_path,
+            tgt_type="compound"
+        )
+        # execute pkg collecting script
+        logger.debug("Running script to all nodes")
+        # handle results for each node
+        _result = self.salt.cmd(
+            _active_nodes_string,
+            'cmd.run',
+            param='python {}'.format(_target_path),
+            expr_form="compound"
+        )
+        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]['packages'] = _dict
+            else:
+                self.nodes[key]['packages'] = {}
+            logger_cli.info("{} has {} packages installed".format(
+                key,
+                len(self.nodes[key]['packages'].keys())
+            ))
+
+    def collect_packages(self):
+        """
+        Check package versions in repos vs installed
+
+        :return: no return values, all date put to dict in place
+        """
+        _all_packages = {}
+        for node_name, node_value in self.nodes.iteritems():
+            for package_name in node_value['packages']:
+                if package_name not in _all_packages:
+                    _all_packages[package_name] = {}
+                _all_packages[package_name][node_name] = node_value
+
+        # TODO: process data for per-package basis
+
+        self.all_packages = _all_packages
+
+    def create_html_report(self, filename):
+        """
+        Create static html showing packages diff per node
+
+        :return: buff with html
+        """
+        _report = reporter.ReportToFile(
+            reporter.HTMLPackageCandidates(),
+            filename
+        )
+        _report({
+            "nodes": self.nodes,
+            "diffs": {}
+        })
+
+
+if __name__ == '__main__':
+    # init connection to salt and collect minion data
+    cl = CloudPackageChecker()
+
+    # collect data on installed packages
+    cl.collect_installed_packages()
+
+    # diff installed and candidates
+    # cl.collect_packages()
+
+    # report it
+    cl.create_html_report("./pkg_versions.html")
+
+    sys.exit(0)
diff --git a/cfg_checker/reclass_cmp.py b/cfg_checker/reclass_cmp.py
new file mode 100644
index 0000000..d644679
--- /dev/null
+++ b/cfg_checker/reclass_cmp.py
@@ -0,0 +1,312 @@
+"""Model Comparer:
+- yaml parser
+- class tree comparison
+"""
+import itertools
+import os
+import yaml
+
+import reporter
+from cfg_checker.common import logger, logger_cli
+
+
+global prefix_name
+global model_name_1, model_path_1
+global model_name_2, model_path_2
+
+prefix_name = "emk"
+model_name_1 = "dev"
+model_path_1 = "/Users/savex/proj/mediakind/reclass-dev"
+model_name_2 = "stg"
+model_path_2 = "/Users/savex/proj/mediakind/reclass-stg"
+
+
+class ModelComparer(object):
+    """Collection of functions to compare model data.
+    """
+    models = {}
+
+    @staticmethod
+    def load_yaml_class(fname):
+        """Loads a yaml from the file and forms a tree item
+
+        Arguments:
+            fname {string} -- full path to the yaml file
+        """
+        _yaml = {}
+        try:
+            _size = 0
+            with open(fname, 'r') as f:
+                _yaml = yaml.load(f)
+                _size = f.tell()
+            # TODO: do smth with the data
+            if not _yaml:
+                logger_cli.warning("WARN: empty file '{}'".format(fname))
+                _yaml = {}
+            else:
+                logger.debug("...loaded YAML '{}' ({}b)".format(fname, _size))
+            return _yaml
+        except yaml.YAMLError as exc:
+            logger_cli.error(exc)
+        except IOError as e:
+            logger_cli.error(
+                "Error loading file '{}': {}".format(fname, e.message)
+            )
+            raise Exception("CRITICAL: Failed to load YAML data: {}".format(
+                e.message + e.strerror
+            ))
+
+    def load_model_tree(self, name, root_path="/srv/salt/reclass"):
+        """Walks supplied path for the YAML filed and loads the tree
+
+        Arguments:
+            root_folder_path {string} -- Path to Model's root folder. Optional
+        """
+        logger_cli.info("Loading reclass tree from '{}'".format(root_path))
+        # prepare the file tree to walk
+        raw_tree = {}
+        # Credits to Andrew Clark@MIT. Original code is here:
+        # http://code.activestate.com/recipes/577879-create-a-nested-dictionary-from-oswalk/
+        root_path = root_path.rstrip(os.sep)
+        start = root_path.rfind(os.sep) + 1
+        root_key = root_path.rsplit(os.sep, 1)[1]
+        # Look Ma! I am walking the file tree with no recursion!
+        for path, dirs, files in os.walk(root_path):
+            # if this is a hidden folder, ignore it
+            _filders_list = path[start:].split(os.sep)
+            if any(item.startswith(".") for item in _filders_list):
+                continue
+            # cut absolute part of the path and split folder names
+            folders = path[start:].split(os.sep)
+            subdir = {}
+            # create generator of files that are not hidden
+            _exts = ('.yml', '.yaml')
+            _subfiles = (file for file in files
+                         if file.endswith(_exts) and not file.startswith('.'))
+            for _file in _subfiles:
+                # cut file extension. All reclass files are '.yml'
+                _subnode = _file
+                # load all YAML class data into the tree
+                subdir[_subnode] = self.load_yaml_class(
+                    os.path.join(path, _file)
+                )
+                try:
+                    # Save original filepath, just in case
+                    subdir[_subnode]["_source"] = os.path.join(
+                        path[start:],
+                        _file
+                    )
+                except Exception:
+                    logger.warning(
+                        "Non-yaml file detected: {}".format(_file)
+                    )
+            # creating dict structure out of folder list. Pure python magic
+            parent = reduce(dict.get, folders[:-1], raw_tree)
+            parent[folders[-1]] = subdir
+        # save it as a single data object
+        self.models[name] = raw_tree[root_key]
+        return True
+
+    def generate_model_report_tree(self):
+        """Use two loaded models to generate comparison table with
+        values are groupped by YAML files
+        """
+        def find_changes(dict1, dict2, path=""):
+            _report = {}
+            for k in dict1.keys():
+                # yamls might load values as non-str types
+                if not isinstance(k, str):
+                    _new_path = path + ":" + str(k)
+                else:
+                    _new_path = path + ":" + k
+                # ignore _source key
+                if k == "_source":
+                    continue
+                # check if this is an env name cluster entry
+                if dict2 is not None and \
+                        k == model_name_1 and \
+                        model_name_2 in dict2.keys():
+                    k1 = model_name_1
+                    k2 = model_name_2
+                    if type(dict1[k1]) is dict:
+                        if path == "":
+                            _new_path = k1
+                        _child_report = find_changes(
+                            dict1[k1],
+                            dict2[k2],
+                            _new_path
+                        )
+                        _report.update(_child_report)
+                elif dict2 is None or k not in dict2:
+                    # no key in dict2
+                    _report[_new_path] = {
+                        "type": "value",
+                        "raw_values": [dict1[k], "N/A"],
+                        "str_values": [
+                            "{}".format(dict1[k]),
+                            "n/a"
+                        ]
+                    }
+                    logger.info(
+                        "{}: {}, {}".format(_new_path, dict1[k], "N/A")
+                    )
+                else:
+                    if type(dict1[k]) is dict:
+                        if path == "":
+                            _new_path = k
+                        _child_report = find_changes(
+                            dict1[k],
+                            dict2[k],
+                            _new_path
+                        )
+                        _report.update(_child_report)
+                    elif type(dict1[k]) is list and type(dict2[k]) is list:
+                        # use ifilterfalse to compare lists of dicts
+                        try:
+                            _removed = list(
+                                itertools.ifilterfalse(
+                                    lambda x: x in dict2[k],
+                                    dict1[k]
+                                )
+                            )
+                            _added = list(
+                                itertools.ifilterfalse(
+                                    lambda x: x in dict1[k],
+                                    dict2[k]
+                                )
+                            )
+                        except TypeError as e:
+                            # debug routine,
+                            # should not happen, due to list check above
+                            logger.error(
+                                "Caught lambda type mismatch: {}".format(
+                                    e.message
+                                )
+                            )
+                            logger_cli.warning(
+                                "Types mismatch for correct compare: "
+                                "{}, {}".format(
+                                    type(dict1[k]),
+                                    type(dict2[k])
+                                )
+                            )
+                            _removed = None
+                            _added = None
+                        _original = ["= {}".format(item) for item in dict1[k]]
+                        if _removed or _added:
+                            _removed_str_lst = ["- {}".format(item)
+                                                for item in _removed]
+                            _added_str_lst = ["+ {}".format(item)
+                                              for item in _added]
+                            _report[_new_path] = {
+                                "type": "list",
+                                "raw_values": [
+                                    dict1[k],
+                                    _removed_str_lst + _added_str_lst
+                                ],
+                                "str_values": [
+                                    "{}".format('\n'.join(_original)),
+                                    "{}\n{}".format(
+                                        '\n'.join(_removed_str_lst),
+                                        '\n'.join(_added_str_lst)
+                                    )
+                                ]
+                            }
+                            logger.info(
+                                "{}:\n"
+                                "{} original items total".format(
+                                    _new_path,
+                                    len(dict1[k])
+                                )
+                            )
+                            if _removed:
+                                logger.info(
+                                    "{}".format('\n'.join(_removed_str_lst))
+                                )
+                            if _added:
+                                logger.info(
+                                    "{}".format('\n'.join(_added_str_lst))
+                                )
+                    else:
+                        # in case of type mismatch
+                        # considering it as not equal
+                        d1 = dict1
+                        d2 = dict2
+                        val1 = d1[k] if isinstance(d1, dict) else d1
+                        val2 = d2[k] if isinstance(d2, dict) else d2
+                        try:
+                            match = val1 == val2
+                        except TypeError as e:
+                            logger.warning(
+                                "One of the values is not a dict: "
+                                "{}, {}".format(
+                                    str(dict1),
+                                    str(dict2)
+                                ))
+                            match = False
+                        if not match:
+                            _report[_new_path] = {
+                                "type": "value",
+                                "raw_values": [val1, val2],
+                                "str_values": [
+                                    "{}".format(val1),
+                                    "{}".format(val2)
+                                ]
+                            }
+                            logger.info("{}: {}, {}".format(
+                                _new_path,
+                                val1,
+                                val2
+                            ))
+            return _report
+        # tmp report for keys
+        diff_report = find_changes(
+            self.models[model_name_1],
+            self.models[model_name_2]
+        )
+        # prettify the report
+        for key in diff_report.keys():
+            # break the key in two parts
+            _ext = ".yml"
+            if ".yaml" in key:
+                _ext = ".yaml"
+            _split = key.split(_ext)
+            _file_path = _split[0]
+            _param_path = "none"
+            if len(_split) > 1:
+                _param_path = _split[1]
+            diff_report[key].update({
+                "class_file": _file_path + _ext,
+                "param": _param_path,
+            })
+
+        diff_report["diff_names"] = [model_name_1, model_name_2]
+        return diff_report
+
+
+# temporary executing the parser as a main prog
+if __name__ == '__main__':
+    mComparer = ModelComparer()
+    mComparer.load_model_tree(
+        model_name_1,
+        model_path_1
+    )
+    mComparer.load_model_tree(
+        model_name_2,
+        model_path_2
+    )
+    diffs = mComparer.generate_model_report_tree()
+
+    report_file = \
+        prefix_name + "-" + model_name_1 + "-vs-" + model_name_2 + ".html"
+    report = reporter.ReportToFile(
+        reporter.HTMLModelCompare(),
+        report_file
+    )
+    logger_cli.info("...generating report to {}".format(report_file))
+    report({
+        "nodes": {},
+        "diffs": diffs
+    })
+    # with open("./gen_tree.json", "w+") as _out:
+    #     _out.write(json.dumps(mComparer.generate_model_report_tree))
diff --git a/cfg_checker/reporter.py b/cfg_checker/reporter.py
new file mode 100644
index 0000000..3b21894
--- /dev/null
+++ b/cfg_checker/reporter.py
@@ -0,0 +1,178 @@
+import jinja2
+import six
+import abc
+import os
+
+from cfg_checker.common import const
+
+pkg_dir = os.path.dirname(__file__)
+pkg_dir = os.path.join(pkg_dir, os.pardir)
+pkg_dir = os.path.normpath(pkg_dir)
+
+
+def shortname(node_fqdn):
+    # form shortname out of node fqdn
+    return node_fqdn.split(".", 1)[0]
+
+
+def is_equal(pkg_dict):
+    # compare versions of given package
+    return pkg_dict['installed'] == pkg_dict['candidate']
+
+
+def is_active(node_dict):
+    # check node status in node dict
+    return node_dict['status'] == const.NODE_UP
+
+
+def line_breaks(text):
+    # replace python linebreaks with html breaks
+    return text.replace("\n", "<br />")
+
+
+@six.add_metaclass(abc.ABCMeta)
+class _Base(object):
+    def __init__(self):
+        self.jinja2_env = self.init_jinja2_env()
+
+    @abc.abstractmethod
+    def __call__(self, payload):
+        pass
+
+    @staticmethod
+    def init_jinja2_env():
+        return jinja2.Environment(
+            loader=jinja2.FileSystemLoader(os.path.join(pkg_dir, 'templates')),
+            trim_blocks=True,
+            lstrip_blocks=True)
+
+
+class _TMPLBase(_Base):
+    @abc.abstractproperty
+    def tmpl(self):
+        pass
+
+    @staticmethod
+    def _count_totals(data):
+        data['counters']['total_nodes'] = len(data['nodes'])
+
+    def __call__(self, payload):
+        # init data structures
+        data = self.common_data()
+        data.update({
+            "nodes": payload['nodes'],
+            "diffs": payload['diffs']
+        })
+
+        # add template specific data
+        self._extend_data(data)
+
+        # do counts global
+        self._count_totals(data)
+
+        # specific filters
+        self.jinja2_env.filters['shortname'] = shortname
+        self.jinja2_env.filters['is_equal'] = is_equal
+        self.jinja2_env.filters['is_active'] = is_active
+        self.jinja2_env.filters['linebreaks'] = line_breaks
+
+        # render!
+        tmpl = self.jinja2_env.get_template(self.tmpl)
+        return tmpl.render(data)
+
+    def common_data(self):
+        return {
+            'counters': {},
+            'salt_info': {}
+        }
+
+    def _extend_data(self, data):
+        pass
+
+
+# Package versions report
+class HTMLPackageCandidates(_TMPLBase):
+    tmpl = "pkg_versions_tmpl.j2"
+
+    @staticmethod
+    def is_fail_uniq(p_dict, p_name, nodes, node_name):
+        # look up package fail for nodes with similar role
+        _tgroup = nodes[node_name]['node_group']
+        # filter all nodes with the same role
+        _nodes_list = filter(
+            lambda nd: nodes[nd]['node_group'] == _tgroup and nd != node_name,
+            nodes
+        )
+        # lookup same package
+        _fail_uniq = False
+        for _node_name in _nodes_list:
+            # check if there is a package present on node
+            _nd = nodes[_node_name]['packages']
+            if p_name not in _nd:
+                continue
+            # if both backages has same version and differ from candidate
+            if p_dict['candidate'] == _nd[p_name]['candidate'] \
+                    and _nd[p_name]['candidate'] == _nd[p_name]['installed']:
+                # it is not uniq, mark and break
+                _fail_uniq = True
+        return _fail_uniq
+
+    def _extend_data(self, data):
+        _all_pkg = 0
+        for key, value in data['nodes'].iteritems():
+            # add count of packages for this node to total
+            _all_pkg += len(value.keys())
+
+            # count differences
+            data['counters'][key] = {}
+            data['counters'][key]['packages'] = len(value['packages'].keys())
+            data['counters'][key]['package_diff'] = 0
+            for pkg_name, pkg_value in value['packages'].iteritems():
+                if pkg_value['installed'] != pkg_value['candidate']:
+                    pkg_value['is_equal'] = False
+                    pkg_value['fail_uniq'] = self.is_fail_uniq(
+                        pkg_value,
+                        pkg_name,
+                        data['nodes'],
+                        key
+                    )
+                    data['counters'][key]['package_diff'] += 1
+                else:
+                    pkg_value['is_equal'] = True
+                    pkg_value['fail_uniq'] = False
+
+        data['counters']['total_packages'] = _all_pkg
+
+
+# Package versions report
+class HTMLModelCompare(_TMPLBase):
+    tmpl = "model_tree_cmp_tmpl.j2"
+
+    def _extend_data(self, data):
+        # move names into separate place
+        data["names"] = data["diffs"].pop("diff_names")
+
+        # counters - mdl_diff
+        data['counters']['mdl_diff'] = len(data["diffs"].keys())
+
+
+class ReportToFile(object):
+    def __init__(self, report, target):
+        self.report = report
+        self.target = target
+
+    def __call__(self, payload):
+        payload = self.report(payload)
+
+        if isinstance(self.target, six.string_types):
+            self._wrapped_dump(payload)
+        else:
+            self._dump(payload, self.target)
+
+    def _wrapped_dump(self, payload):
+        with open(self.target, 'wt') as target:
+            self._dump(payload, target)
+
+    @staticmethod
+    def _dump(payload, target):
+        target.write(payload)