Testing OpenStack upgrades
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tobiko/tobiko/docker/_client.py

111 lines
3.4 KiB

# Copyright (c) 2019 Red Hat, Inc.
#
# 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.
from __future__ import absolute_import
import docker
import tobiko
from tobiko.docker import _exception
from tobiko.docker import _shell
from tobiko.shell import ssh
def get_docker_client(base_urls=None, ssh_client=None):
return DockerClientFixture(base_urls=base_urls,
ssh_client=ssh_client)
def list_docker_containers(client=None, **kwargs):
try:
containers = docker_client(client).containers.list(all=True, **kwargs)
except _exception.DockerUrlNotFoundError:
return tobiko.Selection()
else:
return tobiko.select(containers)
def docker_client(obj=None):
if obj is None:
obj = get_docker_client()
if tobiko.is_fixture(obj):
obj = tobiko.setup_fixture(obj).client
if isinstance(obj, docker.DockerClient):
return obj
raise TypeError('Cannot obtain a DockerClient from {!r}'.format(obj))
class DockerClientFixture(tobiko.SharedFixture):
base_urls = None
client = None
ssh_client = None
def __init__(self, base_urls=None, ssh_client=None):
super(DockerClientFixture, self).__init__()
if base_urls:
self.base_urls = list(base_urls)
if ssh_client:
self.ssh_client = ssh_client
def setup_fixture(self):
self.setup_ssh_client()
self.setup_base_urls()
self.setup_client()
def setup_ssh_client(self):
ssh_client = self.ssh_client
if ssh_client is None:
self.ssh_client = ssh_client = ssh.ssh_proxy_client() or False
if ssh_client:
tobiko.setup_fixture(ssh_client)
return ssh_client
def setup_base_urls(self):
base_urls = self.base_urls
if base_urls is None:
self.base_urls = base_urls = self.discover_docker_urls()
return base_urls
def setup_client(self):
client = self.client
if client is None:
self.client = client = self.create_client()
return client
def create_client(self):
exc_info = None
for base_url in self.base_urls:
if self.ssh_client:
base_url = ssh.get_port_forward_url(ssh_client=self.ssh_client,
url=base_url)
client = docker.DockerClient(base_url=base_url)
try:
client.ping()
except Exception:
exc_info = exc_info or tobiko.exc_info()
else:
return client
if exc_info:
exc_info.reraise()
else:
raise _exception.DockerError('Unable to create docker client')
def connect(self):
return tobiko.setup_fixture(self).client
def discover_docker_urls(self):
return _shell.discover_docker_urls(ssh_client=self.ssh_client)