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#!/usr/bin/env python
#
# Copyright 2015 Codethink Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
'''openstack/tester
This script tests an image on openstack.
'''
import os
import pipes
import socket
import time
import uuid
import yaml
import cliapp
from novaclient import client
class TimeoutError(cliapp.AppException):
"""Error to be raised when a connection waits too long"""
def __init__(self, msg):
super(TimeoutError, self).__init__(msg)
def delete_image(hostname):
# TODO: Do all this stuff properly with python novaclient
# Remove an image from the openstack tenancy
print "Deleting %s test disc image" % (hostname)
try:
cliapp.runcmd(['nova', 'image-delete', hostname])
except cliapp.AppException as e:
# TODO: Stop assuming that image-delete failed because it was
# already removed
print "- Failed"
pass
def delete_instance_and_image(hostname):
# TODO: Do all this stuff properly with python novaclient
# Stop and remove VM, and its image
print "Deleting %s test instance" % (hostname)
try:
cliapp.runcmd(['nova', 'delete', hostname])
except cliapp.AppException as e:
# TODO: Stop assuming that delete failed because the instance
# wasn't running
print "- Failed"
pass
# Sleep for a bit, or nova silently fails to delete the image
# TODO: Test whether the image has been deleted in a retry loop.
time.sleep(20)
delete_image(hostname)
class DeployedSystemInstance(object):
def __init__(self, deployment, ip_addr, hostname):
self.deployment = deployment
self.ip_address = ip_addr
self.hostname = hostname
@property
def ssh_host(self):
# TODO: Stop assuming we ssh into test instances as root
return 'root@{host}'.format(host=self.ip_address)
def runcmd(self, argv, chdir='.', **kwargs):
ssh_cmd = ['ssh', '-o', 'StrictHostKeyChecking=no',
'-o', 'UserKnownHostsFile=/dev/null', self.ssh_host]
cmd = ['sh', '-c', 'cd "$1" && shift && exec "$@"', '-', chdir]
cmd += argv
ssh_cmd.append(' '.join(map(pipes.quote, cmd)))
return cliapp.runcmd(ssh_cmd, **kwargs)
def _wait_for_dhcp(self, timeout):
'''Block until given hostname resolves successfully.
Raises TimeoutError if the hostname has not appeared in 'timeout'
seconds.
'''
start_time = time.time()
while True:
try:
socket.gethostbyname(self.ip_address)
return
except socket.gaierror:
pass
if time.time() > start_time + timeout:
raise TimeoutError("Host %s did not appear after %i seconds" %
(self.ip_address, timeout))
time.sleep(0.5)
def _wait_for_ssh(self, timeout):
"""Wait until the deployed VM is responding via SSH"""
start_time = time.time()
while True:
try:
self.runcmd(['true'], stdin=None, stdout=None, stderr=None)
return
except cliapp.AppException:
# TODO: Stop assuming the ssh part of the command is what failed
if time.time() > start_time + timeout:
raise TimeoutError("%s sshd did not start after %i seconds"
% (self.ip_address, timeout))
time.sleep(0.5)
def _wait_for_cloud_init(self, timeout):
"""Wait until cloud init has resized the disc"""
start_time = time.time()
while True:
try:
out = self.runcmd(['sh', '-c',
'test -e "$1" && echo exists || echo does not exist',
'-',
'/root/cloud-init-finished'])
except:
import traceback
traceback.print_exc()
raise
if out.strip() == 'exists':
return
if time.time() > start_time + timeout:
raise TimeoutError("Disc size not increased after %i seconds"
% (timeout))
time.sleep(3)
def wait_until_online(self, timeout=180):
self._wait_for_dhcp(timeout)
self._wait_for_ssh(timeout)
#self._wait_for_cloud_init(timeout)
print "Test system %s ready to run tests." % (self.hostname)
def delete(self):
delete_instance_and_image(self.hostname)
class Deployment(object):
def __init__(self, net_id, image_file, flavour):
self.net_id = net_id
self.image_file = image_file
self.flavour = flavour
def deploy(self):
hostname = str(uuid.uuid4())
# Deploy the image to openstack
# TODO: Ensure this is cleaned up when something raises an exception
print('Uploading image to openstack host')
args = ['glance', 'image-create', '--progress',
'--name', hostname,
'--disk-format', 'raw',
'--container-format', 'bare',
'--file', self.image_file]
cliapp.runcmd(args, stdin=None, stdout=None, stderr=None)
# Get a novaclient object
nc = client.Client(2,
os.environ['OS_USERNAME'],
os.environ['OS_PASSWORD'],
os.environ['OS_TENANT_NAME'],
os.environ['OS_AUTH_URL'])
# Boot an instance from the image
# TODO: Ensure this is cleaned up when something raises an exception
# TODO: use python-novaclient
print('Booting an instance from the image')
args = ['nova', 'boot',
'--flavor', self.flavour,
'--image', hostname,
#'--user-data', '/usr/lib/mason/os-init-script',
'--nic', "net-id=%s" % (self.net_id),
hostname]
output = cliapp.runcmd(args)
# Print nova boot output, with adminPass line removed
output_lines = output.split('\n')
for line in output_lines:
if line.find('adminPass') != -1:
password_line = line
output_lines.remove(password_line)
output = '\n'.join(output_lines)
print output
# Sleep for a bit, or nova explodes when trying to assign IP address
time.sleep(20)
# Assign a floating IP address
print('Requesting a floating IP address')
for _ in xrange(5):
ip_list = nc.floating_ips.list()
free_ip = None
for ip in ip_list:
if ip.instance_id == None:
free_ip = ip
break
else:
free_ip = nc.floating_ips.create(
nc.floating_ip_pools.list()[0].name)
if free_ip != None:
instance = nc.servers.find(name=hostname)
# TODO: switch back to cli tool, as python
# approach gave error.
instance.add_floating_ip(free_ip)
ip_addr = free_ip.ip
break
else:
delete_instance_and_image(hostname)
raise cliapp.AppException('Could not get a floating IP')
# Print the IP address
print "IP address for instance %s: %s" % (hostname, ip_addr)
return DeployedSystemInstance(self, ip_addr, hostname)
class ReleaseApp(cliapp.Application):
"""Cliapp application which handles automatic builds and tests"""
def add_settings(self):
"""Add the command line options needed"""
group_main = 'Program Options'
self.settings.string(['net-id'],
'Openstack network ID',
default=None,
group=group_main)
self.settings.string(['image-file'],
'Path to system image to test',
default=None,
group=group_main)
self.settings.string(['flavour'],
'Name of flavour to use for instance',
default=None,
group=group_main)
def run_tests(self, instance, tests):
instance.wait_until_online()
for test in tests:
with open(test, 'r') as stream:
data = yaml.load(stream)
if data == None:
continue
if 'name' not in data:
print('Bad test: no name')
continue
if 'commands' not in data:
print('Bad test: no commands')
continue
print('Running test: ' + data['name'])
for cmd in data['commands']:
print('$ ' + cmd)
instance.runcmd(['sh', '-c', cmd], stdout=self.output)
def deploy_and_test_systems(self, tests):
"""Run the deployments and tests"""
deployment = Deployment(self.settings['net-id'],
self.settings['image-file'],
self.settings['flavour'])
instance = deployment.deploy()
try:
self.run_tests(instance, tests)
finally:
instance.delete()
def process_args(self, args):
"""Process the command line args and kick off the builds/tests"""
for setting in ('net-id', 'image-file', 'flavour'):
self.settings.require(setting)
if len(args) == 0:
print('Warning: No tests specified.')
self.deploy_and_test_systems(args)
if __name__ == '__main__':
ReleaseApp().run()
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