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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 logging
from os_faults.ansible import executor
from os_faults.api import container
from os_faults.api import error
LOG = logging.getLogger(__name__)
class DockerContainers(container.Container):
"""Docker container
This is docker container driver for any docker containers supported by
Ansible. Please refer to Ansible documentation
https://docs.ansible.com/ansible/latest/modules/docker_container_module.html
for the whole list.
**Example configuration:**
.. code-block:: yaml
containers:
app:
driver: docker_container
args:
container_name: app
parameters:
- **container_name** - name of the container
"""
NAME = 'docker_container'
DESCRIPTION = 'Docker container'
CONFIG_SCHEMA = {
'type': 'object',
'properties': {
'container_name': {'type': 'string'},
},
'required': ['container_name'],
'additionalProperties': False,
}
def __init__(self, *args, **kwargs):
super(DockerContainers, self).__init__(*args, **kwargs)
self.container_name = self.config['container_name']
def _run_task(self, nodes, task, message):
nodes = nodes if nodes is not None else self.get_nodes()
if len(nodes) == 0:
raise error.ContainerError(
'Container %s is not found on any nodes' % self.container_name)
LOG.info('%s container %s on nodes: %s',
message, self.container_name, nodes.get_ips())
return self.cloud_management.execute_on_cloud(nodes.hosts, task)
def discover_nodes(self):
nodes = self.cloud_management.get_nodes()
cmd = 'bash -c "docker ps | grep \'{}\'"'.format(self.container_name)
results = self.cloud_management.execute_on_cloud(
nodes.hosts, {'command': cmd}, False)
success_ips = [r.host for r in results
if r.status == executor.STATUS_OK]
hosts = [h for h in nodes.hosts if h.ip in success_ips]
LOG.debug('Container %s is discovered on nodes %s',
self.container_name, hosts)
return self.node_cls(cloud_management=self.cloud_management,
hosts=hosts)
def start(self, nodes=None):
task = {
'docker_container': {
'name': self.container_name, 'state': 'started'
},
}
self._run_task(nodes, task, 'Start')
def terminate(self, nodes=None):
task = {
'docker_container': {
'name': self.container_name, 'state': 'stopped',
},
}
self._run_task(nodes, task, 'Terminate')
def restart(self, nodes=None):
task = {
'docker_container': {
'name': self.container_name, 'state': 'started',
'restart': 'yes'
},
}
self._run_task(nodes, task, 'Restart')
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