def stop_db_service(self, service_candidates, timeout,
disable_on_boot=False, update_db=False):
"""Stop the database service and wait for the database to shutdown.
:param service_candidates: List of possible system service names.
:type service_candidates: list
:param timeout: Wait timeout in seconds.
:type timeout: integer
:param disable_on_boot: Disable service auto-start.
The auto-start setting will be updated
only if the service command succeeds.
:type disable_on_boot: boolean
:param update_db: Suppress the Trove instance heartbeat.
:type update_db: boolean
:raises: :class:`RuntimeError` on failure.
"""
LOG.info(_("Stopping database service."))
operating_system.stop_service(service_candidates)
LOG.debug("Waiting for database to shutdown.")
if not self._wait_for_database_service_status(
instance.ServiceStatuses.SHUTDOWN, timeout, update_db):
raise RuntimeError(_("Database failed to stop."))
LOG.info(_("Database has stopped successfully."))
if disable_on_boot:
LOG.info(_("Disable service auto-start on boot."))
operating_system.disable_service_on_boot(service_candidates)
def _reset_admin_password(self):
"""
Reset the password of the Trove's administrative superuser.
The service should not be running at this point.
A general password reset procedure is:
- disable user authentication and remote access
- restart the service
- update the password in the 'system_auth.credentials' table
- re-enable authentication and make the host reachable
- restart the service
"""
if self.status.is_running:
raise RuntimeError(_("Cannot reset the administrative password. "
"The service is still running."))
try:
# Disable automatic startup in case the node goes down before
# we have the superuser secured.
operating_system.disable_service_on_boot(self.service_candidates)
self.__disable_remote_access()
self.__disable_authentication()
# We now start up the service and immediately re-enable
# authentication in the configuration file (takes effect after
# restart).
# Then we reset the superuser password to its default value
# and restart the service to get user functions back.
self.start_db(update_db=False, enable_on_boot=False)
self.__enable_authentication()
os_admin = self.__reset_user_password_to_default(self._ADMIN_USER)
self.status = CassandraAppStatus(os_admin)
self.restart()
# Now change the administrative password to a new secret value.
self.secure(update_user=os_admin)
finally:
self.stop_db() # Always restore the initial state of the service.
# At this point, we should have a secured database with new Trove-only
# superuser password.
# Proceed to re-enable remote access and automatic startup.
self.__enable_remote_access()
operating_system.enable_service_on_boot(self.service_candidates)
def stop_db_service(self,
service_candidates,
timeout,
disable_on_boot=False,
update_db=False):
"""Stop the database service and wait for the database to shutdown.
:param service_candidates: List of possible system service names.
:type service_candidates: list
:param timeout: Wait timeout in seconds.
:type timeout: integer
:param disable_on_boot: Disable service auto-start.
The auto-start setting will be updated
only if the service command succeeds.
:type disable_on_boot: boolean
:param update_db: Suppress the Trove instance heartbeat.
:type update_db: boolean
:raises: :class:`RuntimeError` on failure.
"""
LOG.info(_("Stopping database service."))
operating_system.stop_service(service_candidates)
LOG.debug("Waiting for database to shutdown.")
if not self._wait_for_database_service_status(
instance.ServiceStatuses.SHUTDOWN, timeout, update_db):
raise RuntimeError(_("Database failed to stop."))
LOG.info(_("Database has stopped successfully."))
if disable_on_boot:
LOG.info(_("Disable service auto-start on boot."))
operating_system.disable_service_on_boot(service_candidates)
def _disable_redis_on_boot(self):
"""
Disables redis on boot.
"""
LOG.info(_("Disabling Redis on boot."))
operating_system.disable_service_on_boot(system.SERVICE_CANDIDATES)
def _disable_redis_on_boot(self):
"""
Disables redis on boot.
"""
LOG.info(_("Disabling Redis on boot."))
operating_system.disable_service_on_boot(system.SERVICE_CANDIDATES)
