コード例 #1
0
def connect_to_resource(resource):
    """connect to resource defined in resource dictionary"""
    log.info("Validating resource accessibility. Connecting to %s.",
             resource['name'])
    if resource['sshPrivateKeyFile'] is not None and os.path.isfile(
            resource['sshPrivateKeyFile']) is False:
        log.error("Can not access ssh private key (%s)"
                  "", resource['sshPrivateKeyFile'])
        exit(1)

    str_io = io.StringIO()
    try:
        sys.stdout = sys.stderr = str_io
        rsh = cfg.sshResource(resource)

        sys.stdout = sys.__stdout__
        sys.stderr = sys.__stderr__

        log.info("Successfully connected to %s\n", resource['name'])
        log.empty_line()

        return rsh
    except akrrError:
        sys.stdout = sys.__stdout__
        sys.stderr = sys.__stderr__

        log.critical("Can not connect to %s\nMessage:\n%s", resource['name'],
                     str_io.getvalue())
        exit(1)
コード例 #2
0
def check_create_dirs(rsh, resource):
    log.info("Checking directory locations\n")

    d = resource['akrrData']
    log.info("Checking: %s:%s", resource['remoteAccessNode'], d)
    status, msg = check_dir(rsh, d, exit_on_fail=True, try_to_create=True)
    log.info(msg)

    d = resource['appKerDir']
    log.info("Checking: %s:%s", resource['remoteAccessNode'], d)
    status, msg = check_dir(rsh, d, exit_on_fail=True, try_to_create=True)
    log.info(msg)

    d = resource['networkScratch']
    log.info("Checking: %s:%s", resource['remoteAccessNode'], d)
    status, msg = check_dir(rsh, d, exit_on_fail=False, try_to_create=False)

    if status is True:
        log.info(msg)
    else:
        log.warning_count += 1
        log.warning(msg)
        log.warning(
            "WARNING %d: network scratch might be have a different location on head node, "
            "so if it is by design it is ok", log.warning_count)

    d = resource['localScratch']
    log.info("Checking: %s:%s", resource['remoteAccessNode'], d)
    status, msg = check_dir(rsh, d, exit_on_fail=False, try_to_create=False)
    if status is True:
        log.info(msg)
    else:
        log.warning_count += 1
        log.warning(msg)
        log.warning(
            "WARNING %d: local scratch might be have a different location on head node, "
            "so if it is by design it is ok", log.warning_count)

    log.empty_line()
コード例 #3
0
def resource_deploy(args):
    global dry_run
    global checking_frequency

    resource_name = args.resource

    if 'dry_run' in args:
        dry_run = args.dry_run

    if "checking_frequency" in args:
        checking_frequency = args.checking_frequency

    if "appkernel" in args:
        app_name = args.appkernel
    else:
        app_name = "test"

    if "nodes" in args:
        nodes = int(args.nodes)
    else:
        nodes = 2

    log.error_count = 0
    log.warning_count = 0

    # validate resource configuration and get config
    resource = validate_resource_parameter_file(resource_name)

    # connect to resource
    rsh = connect_to_resource(resource)

    # do tests
    check_shell(rsh, resource)
    check_create_dirs(rsh, resource)

    # deploy inputs and sources
    copy_exec_sources_and_inputs(rsh, resource)

    # check that app.signature calculator on headnode
    check_appsig(rsh, resource)

    # close connection we don't need it any more
    rsh.close(force=True)
    del rsh

    # run test job to queue
    run_test_job(resource, app_name, nodes)

    if log.error_count == 0:
        append_to_bashrc(resource)
        enable_resource_for_execution(resource)
    log.empty_line()

    log.info("Result:")
    if log.error_count > 0:
        log.error("There are %d errors, fix them.", log.error_count)

    if log.warning_count > 0:
        log.warning(
            "There are %d warnings.\nif warnings have sense you can move to next step!\n",
            log.warning_count)
    if log.error_count == 0 and log.warning_count == 0:
        log.info("\nDONE, you can move to next step!\n")
コード例 #4
0
def validate_resource_parameter_file(resource_name):
    """validate resource parameter file and return dictionary with resource configuration"""
    default_resource_param_filename = os.path.join(cfg.akrr_mod_dir,
                                                   "default_conf",
                                                   "default.resource.conf")
    resource_param_filename = os.path.join(cfg.cfg_dir, "resources",
                                           resource_name, "resource.conf")

    log.info("Validating %s parameters from %s", resource_name,
             resource_param_filename)

    if not os.path.isfile(resource_param_filename):
        log.error("resource parameters file (%s) does not exist!",
                  resource_param_filename)
        exit(1)

    # check syntax
    try:
        tmp = {}
        exec(
            compile(
                open(default_resource_param_filename).read(),
                default_resource_param_filename, 'exec'), tmp)
        exec(
            compile(
                open(resource_param_filename).read(), resource_param_filename,
                'exec'), tmp)
    except Exception as e:
        log.critical(
            "Can not load resource from %s.\nProbably invalid syntax.",
            resource_param_filename)
        raise e

    # now we can load akrr
    resource = cfg.FindResourceByName(resource_name)

    # check that parameters for presents and type
    # format: key,type,can be None,must have parameter
    parameters_types = [
        ['info', str, False, False],
        ['localScratch', str, False, True],
        ['batchJobTemplate', str, False, True],
        ['remoteAccessNode', str, False, True],
        ['name', str, False, False],
        ['akrrCommonCommandsTemplate', str, False, True],
        ['networkScratch', str, False, True],
        ['ppn', int, False, True],
        # ['akrrStartAppKerTemplate',      types.StringType,       False,True],
        ['remoteCopyMethod', str, False, True],
        ['sshUserName', str, False, True],
        ['sshPassword', str, True, False],
        ['sshPrivateKeyFile', str, True, False],
        ['sshPrivateKeyPassword', str, True, False],
        ['batchScheduler', str, False, True],
        ['remoteAccessMethod', str, False, True],
        ['appKerDir', str, False, True],
        ['akrrCommonCleanupTemplate', str, False, True],
        # ['nodeListSetterTemplate',      types.StringType,       False,True],
        ['akrrData', str, False, True]
    ]

    for variable, m_type, can_be_none, must in parameters_types:
        if (must is True) and (variable not in resource):
            log.error("Syntax error in %s\nVariable %s is not set",
                      resource_param_filename, variable)
            exit(1)
        if variable not in resource:
            continue
        if resource[variable] is None and can_be_none is False:
            log.error("Syntax error in %s\nVariable %s can not be None",
                      resource_param_filename, variable)
            exit(1)
        if not isinstance(resource[variable], m_type) and not (
                resource[variable] is None and can_be_none):
            log.error(
                "Syntax error in %s\nVariable %s should be %s, but it is %s !",
                resource_param_filename, variable, str(m_type),
                type(resource[variable]))
            exit(1)

    log.info(
        "Syntax of %s is correct and all necessary parameters are present.",
        resource_param_filename)
    log.empty_line()
    return resource
コード例 #5
0
ファイル: resource_add.py プロジェクト: treydock/akrr
def resource_add(config):
    """add resource, config should have following members
        dry_run - Dry Run No files will actually be created
        minimalistic - Minimize questions number, configuration files will be edited manually
        no-ping - do not run ping to test headnode name
        verbose
    """
    global verbose
    global dry_run
    global no_ping
    global minimalistic
    global resource_name
    global remoteAccessNode
    global remoteAccessMethod
    global remoteCopyMethod
    global sshUserName
    global sshPassword
    global sshPrivateKeyFile
    global sshPrivateKeyPassword
    global networkScratch
    global localScratch
    global akrrData
    global appKerDir
    global batchScheduler
    global batchJobHeaderTemplate

    if config.verbose:
        verbose = True

    log.info("Beginning Initiation of New Resource...")
    verbose = config.verbose
    dry_run = config.dry_run
    resource_deploy.dry_run = config.dry_run
    no_ping = config.no_ping
    minimalistic = config.minimalistic

    log.info("Retrieving Resources from XDMoD Database...")
    # RETRIEVE: the resources from XDMoD
    resources = retrieve_resources()
    log.info("Found following resources from XDMoD Database:\n" +
             "    resource_id  name\n" + "\n".join([
                 "    %11d  %-40s" % (resource_id, resource_name)
                 for resource_name, resource_id in resources
             ]) + "\n")

    if len(resources) > 0:
        while True:
            log.log_input(
                'Enter resource_id for import (enter 0 for no match):')
            resource_id = input()
            if validate_resource_id(resource_id, resources):
                break
            log.warning("Incorrect resource_id try again")
        log.empty_line()
        resource_id = int(resource_id)
    else:
        resource_id = 0

    if resource_id <= 0:  # i.e. no match from XDMoD DB
        resource_id = None

    resource_name = ""
    while True:
        if resource_id is None:
            log.log_input('Enter AKRR resource name:')
            resource_name = input()
        else:
            resource_name2 = get_resource_name_by_id(resource_id, resources)
            log.log_input(
                'Enter AKRR resource name, hit enter to use same name as in XDMoD Database [%s]:'
                % (resource_name2, ))
            resource_name = input()
            if resource_name.strip() == "":
                resource_name = resource_name2

        if validate_resource_name(resource_name):
            break
    log.empty_line()

    while True:
        log.log_input('Enter queuing system on resource (slurm or pbs): ')
        queuing_system = input()
        if validate_queuing_system(queuing_system):
            break
        else:
            log.error("Incorrect queuing_system try again")

    batchScheduler = queuing_system
    log.empty_line()

    if minimalistic is False:
        get_remote_access_method()
        get_system_characteristics()
        get_file_system_access_points()

    log.debug("Summary of parameters" +
              "resource_name: {}".format(resource_name) +
              "remoteAccessNode: {}".format(remoteAccessNode) +
              "remoteAccessMethod: {}".format(remoteAccessMethod) +
              "remoteCopyMethod: {}".format(remoteCopyMethod) +
              "sshUserName: {}".format(sshUserName) +
              "sshPassword: {}".format(sshPassword) +
              "sshPrivateKeyFile: {}".format(sshPrivateKeyFile) +
              "sshPrivateKeyPassword: {}".format(sshPrivateKeyPassword) +
              "networkScratch: {}".format(networkScratch) +
              "localScratch: {}".format(localScratch) +
              "akrrData: {}".format(akrrData) +
              "appKerDir: {}".format(appKerDir) +
              "batchScheduler: {}".format(batchScheduler) +
              "batchJobHeaderTemplate: {}".format(batchJobHeaderTemplate) +
              "\n")

    generate_resource_config(resource_id, resource_name, queuing_system)
    log.info("Initiation of new resource is completed.\n"
             "    Edit batchJobHeaderTemplate variable in {}\n"
             "    and move to resource validation and deployment step.\n"
             "    i.e. execute:\n"
             "        akrr resource deploy -r {}".format(
                 resource_cfg_filename, resource_name))
コード例 #6
0
ファイル: resource_add.py プロジェクト: treydock/akrr
def get_file_system_access_points():
    global resource_name
    global networkScratch
    global localScratch
    global akrrData
    global appKerDir

    home_dir = cfg.sshCommand(rsh, "echo $HOME").strip()
    scratch_network_dir = cfg.sshCommand(rsh, "echo $SCRATCH").strip()

    # localScratch
    local_scratch_default = "/tmp"
    while True:
        log.log_input(
            "Enter location of local scratch (visible only to single node):")
        localScratch = input("[%s]" % local_scratch_default)
        if localScratch.strip() == "":
            localScratch = local_scratch_default
        status, msg = resource_deploy.check_dir_simple(rsh, localScratch)
        if status:
            log.info(msg)
            log.empty_line()
            break
        else:
            log.warning(msg)
            log.warning(
                'local scratch might be have a different location on head node, so if it is by design it is ok'
            )
            log.empty_line()
            break
    localScratch = cfg.sshCommand(rsh, "echo %s" % (localScratch, )).strip()
    # networkScratch
    network_scratch_default = ""
    if scratch_network_dir != "":
        network_scratch_default = scratch_network_dir
    network_scratch_visible = False
    while True:
        log.log_input(
            "Enter location of network scratch (visible only to all nodes),"
            "used for temporary storage of app kernel input/output:")
        if network_scratch_default != "":
            networkScratch = input("[%s]" % network_scratch_default)
            if networkScratch.strip() == "":
                networkScratch = network_scratch_default
        else:
            networkScratch = input("")

        if networkScratch == "":
            log.error("Incorrect value for networkScratch, try again")
            continue

        status, msg = resource_deploy.check_dir(rsh,
                                                networkScratch,
                                                exit_on_fail=False,
                                                try_to_create=True)
        if status:
            log.info(msg)
            network_scratch_visible = True
            log.empty_line()
            break
        else:
            log.warning(msg)
            break
    networkScratch = cfg.sshCommand(rsh,
                                    "echo %s" % (networkScratch, )).strip()
    # appKerDir
    appker_dir_default = os.path.join(home_dir, "appker", resource_name)
    while True:
        log.log_input(
            "Enter future location of app kernels input and executable files:")
        appKerDir = input("[%s]" % appker_dir_default)
        if appKerDir.strip() == "":
            appKerDir = appker_dir_default
        status, msg = resource_deploy.check_dir(rsh,
                                                appKerDir,
                                                exit_on_fail=False,
                                                try_to_create=True)
        if status:
            log.info(msg)
            log.empty_line()
            break
        else:
            log.error(msg)
    appKerDir = cfg.sshCommand(rsh, "echo %s" % (appKerDir, )).strip()
    # akrrData
    akrr_data_default = os.path.join(home_dir, "akrr_data", resource_name)
    if network_scratch_visible:
        akrr_data_default = os.path.join(networkScratch, "akrr_data",
                                         resource_name)
    while True:
        log.log_input(
            "Enter future locations for app kernels working directories (can or even should be on scratch space):"
        )
        akrrData = input("[%s]" % akrr_data_default)
        if akrrData.strip() == "":
            akrrData = akrr_data_default
        status, msg = resource_deploy.check_dir(rsh,
                                                akrrData,
                                                exit_on_fail=False,
                                                try_to_create=True)
        if status:
            log.info(msg)
            log.empty_line()
            break
        else:
            log.error(msg)
    akrrData = cfg.sshCommand(rsh, "echo %s" % (akrrData, )).strip()
コード例 #7
0
ファイル: resource_add.py プロジェクト: treydock/akrr
def get_remote_access_method():
    global resource_name
    global remoteAccessNode
    global remoteAccessMethod
    global remoteCopyMethod
    global sshUserName
    global sshPassword
    global sshPassword4thisSession
    global sshPrivateKeyFile
    global sshPrivateKeyPassword
    global rsh
    global no_ping

    # set remoteAccessNode
    while True:
        log.log_input(
            "Enter Resource head node (access node) full name (e.g. headnode.somewhere.org):"
        )
        remoteAccessNode = input("[%s] " % resource_name)
        if remoteAccessNode.strip() == "":
            remoteAccessNode = resource_name

        response = os.system("ping -c 1 -w2 " + remoteAccessNode +
                             " > /dev/null 2>&1")

        if response == 0:
            break
        else:
            if no_ping:
                log.warning("Can not ping %s, but asked to ignore it.",
                            remoteAccessNode)
                break
            log.error("Incorrect head node name (can not ping %s), try again",
                      remoteAccessNode)

    # set sshUserName
    current_user = getpass.getuser()
    ask_for_user_name = True

    while True:
        if ask_for_user_name:
            log.log_input("Enter username for resource access:")
            sshUserName = input("[%s] " % current_user)
            if sshUserName.strip() == "":
                sshUserName = current_user
            current_user = sshUserName

        # check password-less access
        if sshPassword is None:
            log.info("Checking for password-less access")
        else:
            log.info("Checking for resource access")
        successfully_connected = check_connection_to_resource()

        if successfully_connected:
            if sshPassword is None:
                log.info("Can access resource without password")
            else:
                log.info("Can access resource")

        if successfully_connected is False:
            log.info("Can not access resource without password")
            action_list = [(
                "TryAgain",
                "The private and public keys was generated manually, right now. Try again."
            )]
            # check private keys
            user_home_dir = os.path.expanduser("~")
            private_keys = [
                os.path.join(user_home_dir, '.ssh', f[:-4])
                for f in os.listdir(os.path.join(user_home_dir, '.ssh'))
                if os.path.isfile(os.path.join(user_home_dir, '.ssh', f))
                and f[-4:] == '.pub'
                and os.path.isfile(os.path.join(user_home_dir, '.ssh', f[:-4]))
            ]

            if len(private_keys) > 0:
                action_list.append(("UseExistingPrivateKey",
                                    "Use existing private and public key."))

            action_list.append(
                ("GenNewKey", "Generate new private and public key."))
            action_list.append(("UsePassword", "Use password directly."))
            log.empty_line()

            log.info("Select authentication method:" + "\n".join([
                "%3d  %s" % (i, desc)
                for i, (_, desc) in enumerate(action_list)
            ]))
            while True:
                log.log_input("Select option from list above:")
                try:
                    action = input("[2] ")
                    if action.strip() == "":
                        action = 2
                    else:
                        action = int(action)

                    if action < 0 or action >= len(action_list):
                        raise ValueError()
                    break
                except (ValueError, TypeError):
                    log.error("Incorrect entry, try again.")

            # do the action
            log.empty_line()
            if action_list[action][0] == "TryAgain":
                continue
            if action_list[action][0] == "UsePassword":
                log.log_input("Enter password for %s@%s:" %
                              (sshUserName, remoteAccessNode))
                sshPassword = getpass.getpass("")
                ask_for_user_name = not ask_for_user_name
                continue
            if action_list[action][0] == "UseExistingPrivateKey":
                log.info("Available private keys:" + "\n".join(
                    ["%3d  %s" % (i, p) for i, p in enumerate(private_keys)]))
                while True:
                    log.log_input("Select key number from list above:")
                    try:
                        i_key = input("")
                        i_key = int(i_key)

                        if i_key < 0 or i_key >= len(private_keys):
                            raise ValueError()
                        break
                    except (ValueError, TypeError):
                        log.error("Incorrect entry, try again.")
                sshPrivateKeyFile = private_keys[i_key]
                ask_for_user_name = not ask_for_user_name
                continue
            if action_list[action][0] == "GenNewKey":
                count = 0
                while True:
                    log.log_input(
                        "Enter password for %s@%s (will be used only during this session):"
                        % (sshUserName, remoteAccessNode))
                    sshPassword4thisSession = getpass.getpass("")
                    sshPassword = sshPassword4thisSession

                    if check_connection_to_resource():
                        break
                    count += 1
                    if count >= 3:
                        break
                sshPassword = None
                # generate keys
                log.log_input("Enter private key name:")
                sshPrivateKeyFile = input("[id_rsa_%s]" % resource_name)
                if sshPrivateKeyFile.strip() == "":
                    sshPrivateKeyFile = "id_rsa_%s" % resource_name
                sshPrivateKeyFile = os.path.join(user_home_dir, '.ssh',
                                                 sshPrivateKeyFile)
                log.log_input(
                    "Enter passphrase for new key (leave empty for passwordless access):"
                )
                sshPrivateKeyPassword = getpass.getpass("")
                os.system("ssh-keygen -t rsa -N \"%s\" -f %s" %
                          (sshPrivateKeyPassword, sshPrivateKeyFile))
                if sshPrivateKeyPassword.strip() == "":
                    sshPrivateKeyPassword = None
                # copy keys
                cfg.sshAccess(remoteAccessNode,
                              ssh='ssh-copy-id',
                              username=sshUserName,
                              password=sshPassword4thisSession,
                              PrivateKeyFile=sshPrivateKeyFile,
                              PrivateKeyPassword=None,
                              logfile=sys.stdout,
                              command='')
                ask_for_user_name = not ask_for_user_name
                continue

        if successfully_connected:
            break
        else:
            log.error("Incorrect resource access credential")

    if successfully_connected:
        log.empty_line()
        log.info("Connecting to " + resource_name)

        str_io = io.StringIO()
        try:
            sys.stdout = sys.stderr = str_io
            rsh = cfg.sshAccess(remoteAccessNode,
                                ssh=remoteAccessMethod,
                                username=sshUserName,
                                password=sshPassword,
                                PrivateKeyFile=sshPrivateKeyFile,
                                PrivateKeyPassword=sshPrivateKeyPassword,
                                logfile=sys.stdout,
                                command=None)
            sys.stdout = sys.__stdout__
            sys.stderr = sys.__stderr__
        except Exception as e:
            sys.stdout = sys.__stdout__
            sys.stderr = sys.__stderr__
            log.debug(str_io.getvalue())
            raise e

        log.info("              Done")
    log.empty_line()
    return successfully_connected
コード例 #8
0
ファイル: resource_add.py プロジェクト: treydock/akrr
def check_connection_to_resource():
    """check the connection to remote resource."""
    global remoteAccessNode
    global remoteAccessMethod
    global remoteCopyMethod
    global sshUserName
    global sshPassword
    global sshPassword4thisSession
    global sshPrivateKeyFile
    global sshPrivateKeyPassword

    successfully_connected = False
    passphrase_entrance_count = 0
    authorize_key_count = 0
    while True:
        # Try to connect
        str_io = io.StringIO()
        try:
            sys.stdout = sys.stderr = str_io
            cfg.sshAccess(remoteAccessNode,
                          ssh=remoteAccessMethod,
                          username=sshUserName,
                          password=sshPassword,
                          PrivateKeyFile=sshPrivateKeyFile,
                          PrivateKeyPassword=sshPrivateKeyPassword,
                          logfile=str_io,
                          command='ls')

            sys.stdout = sys.__stdout__
            sys.stderr = sys.__stderr__

            successfully_connected = True
            break
        except Exception:
            sys.stdout = sys.__stdout__
            sys.stderr = sys.__stderr__
            response = str_io.getvalue()

            log.debug(
                "Had attempted to access resource without password and failed, below is resource response"
                + "=" * 80 + str_io.getvalue() + "=" * 80)

            # check if it asking for passphrase
            m = re.search(r"Enter passphrase for key '(.*)':", response)
            if m:
                if passphrase_entrance_count >= 3:
                    sshPrivateKeyPassword = None
                    sshPrivateKeyFile = None
                    break
                if passphrase_entrance_count > 0:
                    log.error("Incorrect passphrase try again")
                sshPrivateKeyFile = m.group(1)
                log.log_input("Enter passphrase for key '%s':" %
                              sshPrivateKeyFile)
                sshPrivateKeyPassword = getpass.getpass("")
                passphrase_entrance_count += 1
                continue
            m2 = re.search(r"[pP]assword:", response)
            if m is None and sshPrivateKeyFile is not None and m2:
                log.warning(
                    "Can not login to head node. "
                    "Probably the public key of private key was not authorized on head node"
                )
                log.info(
                    "Will try to add public key to list of authorized keys on head node"
                )
                while True:
                    try:
                        authorize_key_count += 1
                        log.log_input(
                            "Enter password for %s@%s (will be used only during this session):"
                            % (sshUserName, remoteAccessNode))
                        sshPassword4thisSession = getpass.getpass("")
                        log.empty_line()
                        str_io = io.StringIO()
                        sys.stdout = sys.stderr = str_io
                        cfg.sshAccess(remoteAccessNode,
                                      ssh='ssh-copy-id',
                                      username=sshUserName,
                                      password=sshPassword4thisSession,
                                      PrivateKeyFile=sshPrivateKeyFile,
                                      PrivateKeyPassword=None,
                                      logfile=str_io,
                                      command='')

                        sys.stdout = sys.__stdout__
                        sys.stderr = sys.__stderr__
                        log.info(response)

                        log.info(
                            "Have added public key to list of authorized keys on head node, "
                            "will attempt to connect again.")
                        log.empty_line()
                        break
                    except Exception:
                        sys.stdout = sys.__stdout__
                        sys.stderr = sys.__stderr__
                        if verbose:
                            log.debug(
                                "Had attempted to add public key to list of authorized keys on head node and failed, "
                                + "below is resource response" + "=" * 80 +
                                str_io.getvalue() + "=" * 80)
                        log.error("Incorrect password try again.")
                        if authorize_key_count >= 3:
                            break
                if authorize_key_count < 3:
                    continue
            break
    return successfully_connected
コード例 #9
0
ファイル: setup.py プロジェクト: treydock/akrr
    def read_db_user_credentials(self):
        ###
        # mod_akrr
        log.info(
            "Before Installation continues we need to setup the database.")

        self.akrr_db_user_name, self.akrr_db_user_password = _read_username_password(
            "Please specify a database user to access mod_akrr database (Used by AKRR)"
            "(This user will be created if it does not already exist):",
            self.akrr_db_user_name, self.akrr_db_user_password,
            self.default_akrr_user)
        log.empty_line()

        # check if user, db already there

        user_exists = False
        db_exists = False
        user_rights_are_correct = False
        try:
            # connect with provided user, Exception will raise if user can not connect
            _, cur = get_con_to_db(self.akrr_db_user_name,
                                   self.akrr_db_user_password,
                                   self.akrr_db_host, self.akrr_db_port)
            client_host = get_db_client_host(cur)
            user_exists = True

            db_exists = db_exist(cur, self.akrr_db_name)
            if not db_exists:
                log.debug("Database {} doesn't exists on {}".format(
                    self.akrr_db_name, self.akrr_db_host))
            user_rights_are_correct = db_check_priv(cur, self.akrr_db_name,
                                                    "ALL",
                                                    self.akrr_db_user_name,
                                                    client_host)
            if not user_rights_are_correct:
                log.debug(
                    "User {} doesn't have right privilege on {}, should be ALL"
                    .format(self.akrr_db_user_name, self.akrr_db_name))
        except MySQLdb.Error:
            user_exists = False
            log.debug("User ({}) does not exists on {}".format(
                self.akrr_db_user_name, self.akrr_db_host))

        # ask for su user on this machine if needed
        if not user_exists or not db_exists or not user_rights_are_correct:
            self.akrr_db_su_user_name, \
            self.akrr_db_su_user_password = _read_sql_su_credentials(self.akrr_db_host, self.akrr_db_port)
        log.empty_line()
        ###
        # mod_appkernel
        same_host_as_ak = self.ak_db_host == self.akrr_db_host and self.ak_db_port == self.akrr_db_port

        self.ak_db_user_name, self.ak_db_user_password = _read_username_password(
            "Please specify a database user to access mod_appkernel database "
            "(Used by XDMoD appkernel module, AKRR creates and syncronize resource and appkernel description)"
            "(This user will be created if it does not already exist):",
            self.ak_db_user_name, self.ak_db_user_password,
            self.akrr_db_user_name,
            self.akrr_db_user_password if same_host_as_ak else None)
        log.empty_line()

        # ask for su user on this machine
        user_exists = False
        db_exists = False
        user_rights_are_correct = False
        try:
            _, cur = get_con_to_db(self.ak_db_user_name,
                                   self.ak_db_user_password, self.ak_db_host,
                                   self.ak_db_port)
            client_host = get_db_client_host(cur)
            user_exists = True

            db_exists = db_exist(cur, self.ak_db_name)
            if not db_exists:
                log.debug("Database {} doesn't exists on {}".format(
                    self.ak_db_name, self.ak_db_host))
            user_rights_are_correct = db_check_priv(cur, self.ak_db_name,
                                                    "ALL",
                                                    self.ak_db_user_name,
                                                    client_host)
            if not user_rights_are_correct:
                log.debug(
                    "User {} doesn't have right privelege on {}, should be ALL"
                    .format(self.ak_db_user_name, self.ak_db_name))
        except Exception as e:
            user_exists = False
            log.debug("User ({}) does not exists on {}".format(
                self.akrr_db_user_name, self.akrr_db_host))

        if not user_exists or not db_exists or not user_rights_are_correct:
            self.ak_db_su_user_name = self.akrr_db_su_user_name
            self.ak_db_su_user_password = self.akrr_db_su_user_password
            try:
                get_con_to_db(self.ak_db_su_user_name,
                              self.ak_db_su_user_password, self.ak_db_host,
                              self.ak_db_port)
            except:
                self.ak_db_su_user_name, \
                self.ak_db_su_user_password = _read_sql_su_credentials(self.ak_db_host, self.ak_db_port)
        log.empty_line()

        ##
        # modw
        same_host_as_xd = self.xd_db_host == self.ak_db_host and self.xd_db_port == self.ak_db_port

        self.xd_db_user_name, \
        self.xd_db_user_password = _read_username_password(
            "Please specify the user that will be connecting to the XDMoD database (modw):",
            self.xd_db_user_name,
            self.xd_db_user_password,
            self.ak_db_user_name,
            self.ak_db_user_password if same_host_as_xd else None
        )
        log.empty_line()

        # ask for su user on this machine
        user_exists = False
        db_exists = False
        user_rights_are_correct = False
        try:

            _, cur = get_con_to_db(self.xd_db_user_name,
                                   self.xd_db_user_password, self.xd_db_host,
                                   self.xd_db_port)
            client_host = get_db_client_host(cur)
            user_exists = True

            db_exists = db_exist(cur, "modw")
            if not db_exists:
                log.debug("Database {} doesn't exists on {}".format(
                    self.xd_db_name, self.xd_db_host))
            user_rights_are_correct = db_check_priv(cur, self.xd_db_name,
                                                    "SELECT",
                                                    self.xd_db_user_name,
                                                    client_host)
            if not user_rights_are_correct:
                log.debug(
                    "User {} doesn't have right privelege on {}, should be at least SELECT"
                    .format(self.xd_db_user_name, self.xd_db_name))
        except Exception as e:
            user_exists = False
            log.debug("User ({}) does not exists on {}".format(
                self.xd_db_user_name, self.xd_db_host))

        if not user_exists or not db_exists or not user_rights_are_correct:
            self.xd_db_su_user_name = self.ak_db_su_user_name
            self.xd_db_su_user_password = self.ak_db_su_user_password
            try:
                get_con_to_db(self.xd_db_su_user_name,
                              self.xd_db_su_user_password, self.xd_db_host,
                              self.xd_db_port)
            except:
                self.ak_db_su_user_name, \
                self.ak_db_su_user_password = _read_sql_su_credentials(self.xd_db_host, self.xd_db_port)
        log.empty_line()