tempest/exceptions.py

# Copyright 2012 OpenStack Foundation
# All Rights Reserved.
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

import testtools


class TempestException(Exception):
    """Base Tempest Exception

    To correctly use this class, inherit from it and define
    a 'message' property. That message will get printf'd
    with the keyword arguments provided to the constructor.
    """
    message = "An unknown exception occurred"

    def __init__(self, *args, **kwargs):
        super(TempestException, self).__init__()
        try:
            self._error_string = self.message % kwargs
        except Exception:
            # at least get the core message out if something happened
            self._error_string = self.message
        if len(args) > 0:
            # If there is a non-kwarg parameter, assume it's the error
            # message or reason description and tack it on to the end
            # of the exception message
            # Convert all arguments into their string representations...
            args = ["%s" % arg for arg in args]
            self._error_string = (self._error_string +
                                  "\nDetails: %s" % '\n'.join(args))

    def __str__(self):
        return self._error_string


class RestClientException(TempestException,
                          testtools.TestCase.failureException):
    pass


class InvalidConfiguration(TempestException):
    message = "Invalid Configuration"


class InvalidCredentials(TempestException):
    message = "Invalid Credentials"


class InvalidServiceTag(TempestException):
    message = "Invalid service tag"


class InvalidIdentityVersion(TempestException):
    message = "Invalid version %(identity_version)s of the identity service"


class TimeoutException(TempestException):
    message = "Request timed out"


class BuildErrorException(TempestException):
    message = "Server %(server_id)s failed to build and is in ERROR status"


class ImageKilledException(TempestException):
    message = "Image %(image_id)s 'killed' while waiting for '%(status)s'"


class AddImageException(TempestException):
    message = "Image %(image_id)s failed to become ACTIVE in the allotted time"


class VolumeBuildErrorException(TempestException):
    message = "Volume %(volume_id)s failed to build and is in ERROR status"


class VolumeRestoreErrorException(TempestException):
    message = "Volume %(volume_id)s failed to restore and is in ERROR status"


class SnapshotBuildErrorException(TempestException):
    message = "Snapshot %(snapshot_id)s failed to build and is in ERROR status"


class VolumeBackupException(TempestException):
    message = "Volume backup %(backup_id)s failed and is in ERROR status"


class StackBuildErrorException(TempestException):
    message = ("Stack %(stack_identifier)s is in %(stack_status)s status "
               "due to '%(stack_status_reason)s'")


class EndpointNotFound(TempestException):
    message = "Endpoint not found"


class IdentityError(TempestException):
    message = "Got identity error"


class ServerUnreachable(TempestException):
    message = "The server is not reachable via the configured network"


# NOTE(andreaf) This exception is added here to facilitate the migration
# of get_network_from_name and preprov_creds to tempest-lib, and it should
# be migrated along with them
class InvalidTestResource(TempestException):
    message = "%(name) is not a valid %(type), or the name is ambiguous"


class RFCViolation(RestClientException):
    message = "RFC Violation"


class InvalidHttpSuccessCode(RestClientException):
    message = "The success code is different than the expected one"


class BadRequest(RestClientException):
    message = "Bad request"


class ResponseWithNonEmptyBody(RFCViolation):
    message = ("RFC Violation! Response with %(status)d HTTP Status Code "
               "MUST NOT have a body")


class ResponseWithEntity(RFCViolation):
    message = ("RFC Violation! Response with 205 HTTP Status Code "
               "MUST NOT have an entity")


class InvalidHTTPResponseHeader(RestClientException):
    message = "HTTP response header is invalid"


class InvalidStructure(TempestException):
    message = "Invalid structure of table with details"


class CommandFailed(Exception):
    def __init__(self, returncode, cmd, output, stderr):
        super(CommandFailed, self).__init__()
        self.returncode = returncode
        self.cmd = cmd
        self.stdout = output
        self.stderr = stderr

    def __str__(self):
        return ("Command '%s' returned non-zero exit status %d.\n"
                "stdout:\n%s\n"
                "stderr:\n%s" % (self.cmd,
                                 self.returncode,
                                 self.stdout,
                                 self.stderr))