def revert_snapshot(self, name):
"""Revert snapshot by name
- Revert a libvirt snapshots for all nodes in the environment
- Try to reload 'config' object from a file 'config_<name>.ini'
If the file not found, then pass with defaults.
- Set <name> as the current state of the environment after reload
:param name: string
"""
LOG.info("Reverting from snapshot named '{0}'".format(name))
if self._env is not None:
self._env.revert(name=name)
LOG.info("Resuming environment after revert")
self._env.resume()
else:
raise exceptions.EnvironmentIsNotSet()
try:
test_config_path = self._get_snapshot_config_name(name)
settings_oslo.reload_snapshot_config(self.__config,
test_config_path)
except cfg.ConfigFilesNotFoundError as conf_err:
LOG.error("Config file(s) {0} not found!".format(
conf_err.config_files))
self.__config.hardware.current_snapshot = name
def start(self):
"""Method for start environment
"""
if self._env is None:
raise exceptions.EnvironmentIsNotSet()
self._env.start()
for node in self.k8s_nodes:
LOG.debug("Waiting for SSH on node '{}...'".format(node.name))
timeout = 360
helpers.wait(
lambda: helpers.tcp_ping(self.node_ip(node), 22),
timeout=timeout,
timeout_msg="Node '{}' didn't open SSH in {} sec".format(
node.name, timeout
)
)
def create_snapshot(self, name, description=None):
"""Create named snapshot of current env.
- Create a libvirt snapshots for all nodes in the environment
- Save 'config' object to a file 'config_<name>.ini'
:name: string
"""
LOG.info("Creating snapshot named '{0}'".format(name))
self.__config.hardware.current_snapshot = name
LOG.info("current config '{0}'".format(
self.__config.hardware.current_snapshot))
if self._env is not None:
LOG.info('trying to suspend ....')
self._env.suspend()
LOG.info('trying to snapshot ....')
self._env.snapshot(name, description=description, force=True)
LOG.info('trying to resume ....')
self._env.resume()
else:
raise exceptions.EnvironmentIsNotSet()
settings_oslo.save_config(self.__config, name, self._env.name)
def stop(self):
"""Stop environment"""
if self._env is None:
raise exceptions.EnvironmentIsNotSet()
self._env.destroy()
def suspend(self):
"""Suspend environment"""
if self._env is None:
raise exceptions.EnvironmentIsNotSet()
self._env.suspend()
def resume(self):
"""Resume environment"""
if self._env is None:
raise exceptions.EnvironmentIsNotSet()
self._env.resume()