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# 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 inspect
import logging
import re
from os_faults.api import container as container_pkg
from os_faults.api import error
from os_faults.api import node_collection as node_collection_pkg
from os_faults.api import service as service_pkg
from os_faults.api import utils
LOG = logging.getLogger(__name__)
"""
Human API understands commands like these (examples):
* restart <service> service [on (random|one|single|<fqdn> node[s])]
* terminate <service> service [on (random|one|single|<fqdn> node[s])]
* start <service> service [on (random|one|single|<fqdn> node[s])]
* kill <service> service [on (random|one|single|<fqdn> node[s])]
* plug <service> service [on (random|one|single|<fqdn> node[s])]
* unplug <service> service [on (random|one|single|<fqdn> node[s])]
* freeze <service> service [on (random|one|single|<fqdn> node[s])]
[for <T> seconds]
* unfreeze <service> service [on (random|one|single|<fqdn> node[s])]
* reboot [random|one|single|<fqdn>] node[s] [with <service> service]
* reset [random|one|single|<fqdn>] node[s] [with <service> service]
* stress [cpu|memory|disk|kernel for <T> seconds] on
[random|one|single|<fqdn>] node[s] [with <service> service]
* disconnect <name> network on [random|one|single|<fqdn>] node[s]
[with <service> service]
* connect <name> network on [random|one|single|<fqdn>] node[s]
[with <service> service]
"""
def list_actions(klazz):
return set(m[0].replace('_', ' ') for m in inspect.getmembers(
klazz,
predicate=utils.is_public))
RANDOMNESS = {'one', 'random', 'some', 'single'}
ANYTHING = {'all'}
NODE_ALIASES_PATTERN = '|'.join(RANDOMNESS | ANYTHING)
SERVICE_ACTIONS = list_actions(service_pkg.Service)
SERVICE_ACTIONS_PATTERN = '|'.join(SERVICE_ACTIONS)
CONTAINER_ACTIONS = list_actions(container_pkg.Container)
CONTAINER_ACTIONS_PATTERN = '|'.join(CONTAINER_ACTIONS)
NODE_ACTIONS = list_actions(node_collection_pkg.NodeCollection)
NODE_ACTIONS_PATTERN = '|'.join(NODE_ACTIONS)
PATTERNS = [
re.compile(r'(?P<action>%s)'
r'\s+(?P<service>\S+)\s+service'
r'(\s+(?P<direction>ingress|egress)\s+(to|from)'
r'\s+(?P<other_service>\S+)\s+service)?'
r'(\s+on(\s+(?P<node>\S+))?\s+nodes?)?'
r'(\s+for\s+(?P<duration>\d+)\s+seconds)?' %
SERVICE_ACTIONS_PATTERN),
re.compile(r'(?P<action>%s)'
r'\s+(?P<container>\S+)\s+container'
r'(\s+on(\s+(?P<node>\S+))?\s+nodes?)?'
r'(\s+for\s+(?P<duration>\d+)\s+seconds)?' %
CONTAINER_ACTIONS_PATTERN),
re.compile(r'(?P<action>%s)'
r'(\s+(?P<network>\w+)\s+network\s+on)?'
r'(\s+(?P<target>\w+)'
r'(\s+for\s+(?P<duration>\d+)\s+seconds)(\s+on)?)?'
r'(\s+(?P<node>%s|\S+))?'
r'\s+nodes?'
r'(\s+with\s+(?P<service>\S+)\s+service)?' %
(NODE_ACTIONS_PATTERN, NODE_ALIASES_PATTERN)),
]
def execute(destructor, command):
command = command.lower()
rec = None
for pattern in PATTERNS:
rec = re.search(pattern, command)
if rec:
break
if not rec:
raise error.OSFException('Could not parse command: %s' % command)
groups = rec.groupdict()
action = groups.get('action').replace(' ', '_')
service_name = groups.get('service')
container_name = groups.get('container')
node_name = groups.get('node')
network_name = groups.get('network')
target = groups.get('target')
duration = groups.get('duration')
direction = groups.get('direction')
if service_name:
service = destructor.get_service(name=service_name)
if action in SERVICE_ACTIONS:
kwargs = {}
if node_name in RANDOMNESS:
kwargs['nodes'] = service.get_nodes().pick()
elif node_name and node_name not in ANYTHING:
kwargs['nodes'] = destructor.get_nodes(fqdns=[node_name])
if duration:
kwargs['sec'] = int(duration)
if direction:
other_service_name = groups.get('other_service')
if other_service_name:
other_service = destructor.get_service(
name=other_service_name)
other_port = getattr(other_service, 'port', None)
if other_port:
kwargs['direction'] = direction
kwargs['other_port'] = other_port
fn = getattr(service, action)
fn(**kwargs)
else: # node actions
nodes = service.get_nodes()
if node_name in RANDOMNESS:
nodes = nodes.pick()
kwargs = {}
if network_name:
kwargs['network_name'] = network_name
if target:
kwargs['target'] = target
kwargs['duration'] = int(duration)
fn = getattr(nodes, action)
fn(**kwargs)
elif container_name:
container = destructor.get_container(name=container_name)
if action in CONTAINER_ACTIONS:
kwargs = {}
if node_name in RANDOMNESS:
kwargs['nodes'] = container.get_nodes().pick()
elif node_name and node_name not in ANYTHING:
kwargs['nodes'] = destructor.get_nodes(fqdns=[node_name])
if duration:
kwargs['sec'] = int(duration)
fn = getattr(container, action)
fn(**kwargs)
else: # node actions
nodes = container.get_nodes()
if node_name in RANDOMNESS:
nodes = nodes.pick()
kwargs = {}
if network_name:
kwargs['network_name'] = network_name
if target:
kwargs['target'] = target
kwargs['duration'] = int(duration)
fn = getattr(nodes, action)
fn(**kwargs)
else: # nodes operation
if node_name and node_name not in ANYTHING:
nodes = destructor.get_nodes(fqdns=[node_name])
else:
nodes = destructor.get_nodes()
kwargs = {}
if network_name:
kwargs['network_name'] = network_name
if target:
kwargs['target'] = target
kwargs['duration'] = int(duration)
fn = getattr(nodes, action)
fn(**kwargs)
LOG.info('Command `%s` is executed successfully', command)
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