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()