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#!/usr/bin/python2
# Copyright (C) 2014-2015 Codethink Limited
#
# 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, see <http://www.gnu.org/licenses/>.
'''Preparatory checks for Morph 'ssh-rsync' write extension'''
import os
import writeexts
class SshRsyncCheckExtension(writeexts.WriteExtension):
def process_args(self, args):
if len(args) != 1:
raise writeexts.ExtensionError(
'Wrong number of command line args')
upgrade = self.get_environment_boolean('UPGRADE')
if not upgrade:
raise writeexts.ExtensionError(
'The ssh-rsync write is for upgrading existing remote '
'Baserock machines. It cannot be used for an initial '
'deployment.')
if os.environ.get('VERSION_LABEL', '') == '':
raise writeexts.ExtensionError(
'A VERSION_LABEL must be set when deploying an upgrade.')
location = args[0]
self.check_ssh_connectivity(location)
self.check_is_baserock_system(location)
# The new system that being deployed as an upgrade must contain
# baserock-system-config-sync and system-version-manager. However, the
# old system simply needs to have SSH and rsync.
self.check_command_exists(location, 'rsync')
def check_is_baserock_system(self, location):
output = writeexts.ssh_runcmd(
location,
['sh', '-c', 'test -d /baserock || echo -n dirnotfound'])
if output == 'dirnotfound':
raise writeexts.ExtensionError('%s is not a baserock system'
% location)
def check_command_exists(self, location, command):
test = 'type %s > /dev/null 2>&1 || echo -n cmdnotfound' % command
output = writeexts.ssh_runcmd(location, ['sh', '-c', test])
if output == 'cmdnotfound':
raise writeexts.ExtensionError(
"%s does not have %s" % (location, command))
SshRsyncCheckExtension().run()
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