343 lines
12 KiB
Python
343 lines
12 KiB
Python
# -*- coding: utf-8; -*-
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################################################################################
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#
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# Rattail -- Retail Software Framework
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# Copyright © 2010-2019 Lance Edgar
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#
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# This file is part of Rattail.
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#
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# Rattail is free software: you can redistribute it and/or modify it under the
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# terms of the GNU General Public License as published by the Free Software
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# Foundation, either version 3 of the License, or (at your option) any later
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# version.
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#
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# Rattail is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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# details.
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#
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# You should have received a copy of the GNU General Public License along with
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# Rattail. If not, see <http://www.gnu.org/licenses/>.
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#
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################################################################################
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"""
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Core Utilities
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"""
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import os
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import re
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import tempfile
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from mako.template import Template
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UNSPECIFIED = object()
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def agent_sudo(c, cmd, user=None):
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"""
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Run a 'sudo' command on the target server, with full agent forwarding.
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.. note::
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For this to actually work, you must have enabled agent forwarding for
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your actual connection to the target machine. This is perhaps most
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easily accomplished via ``~/.ssh/config`` entries. It is assumed
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however that you would only want to enable agent forwarding temporarily,
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just long enough to e.g. rsync some files.
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"""
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c.sudo("bash -c 'SSH_AUTH_SOCK=$SSH_AUTH_SOCK {}'".format(cmd), user=user)
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def is_link(c, path, use_sudo=False):
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"""
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Return True if the given path is a symlink on the current remote host.
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If ``use_sudo`` is True, will use `.sudo` instead of `.run`.
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.. note::
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This function is derived from one copied from fabric v1.
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"""
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func = c.sudo if use_sudo else c.run
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cmd = 'test -L "$(echo %s)"' % path
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result = func(cmd, warn=True)
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return False if result.failed else True
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def get_os_release_id(c):
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"""
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Return the "ID" field from `/etc/os-release` file
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"""
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contents = c.run('cat /etc/os-release').stdout.strip()
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data = {}
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for line in contents.split('\n'):
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field, value = line.split('=')
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data[field] = value
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return data['ID']
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def is_debian(c):
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"""
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Return boolean indicating if this machine is Debian (proper, as opposed to
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some derivative).
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"""
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release_id = get_os_release_id(c)
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return release_id == 'debian'
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def get_debian_version(c):
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"""
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Fetch the version of Debian running on the target system.
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"""
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version = c.run('cat /etc/debian_version').stdout.strip()
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match = re.match(r'^(\d+\.\d+)$', version)
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if match:
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return float(match.group(1))
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def get_ubuntu_version(c):
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"""
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Fetch the version of Ubuntu running on the target system
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"""
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info = c.run('cat /etc/lsb-release').stdout.strip()
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match = re.search(r'DISTRIB_RELEASE=(\d+\.\d+)', info)
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if match:
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return float(match.group(1))
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def mkdir(c, paths, owner=None, mode=None,
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use_sudo=False, runas_user=None):
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"""
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Recursively make one or more directories.
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"""
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if isinstance(paths, str):
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paths = [paths]
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cmd = 'mkdir --parents {}'.format(' '.join(paths))
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if use_sudo:
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c.sudo(cmd, user=runas_user)
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else:
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c.run(cmd)
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if owner:
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if ':' not in owner:
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owner = '{0}:{0}'.format(owner)
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func = c.sudo if use_sudo else c.run
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func('chown {} {}'.format(owner, ' '.join(paths)))
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if mode is not None:
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func = c.sudo if use_sudo else c.run
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func('chmod {} {}'.format(mode, ' '.join(paths)))
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def make_system_user(c, name, home=None, uid=None, shell=None):
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"""
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Make a new system user account, with the given home folder and shell path.
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"""
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if not c.run('getent passwd {}'.format(name), warn=True).failed:
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return
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home = '--home {}'.format(home) if home else ''
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uid = '--uid {}'.format(uid) if uid else ''
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shell = '--shell {}'.format(shell) if shell else ''
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c.sudo('adduser --system --group {} {} {} {}'.format(name, home, uid, shell))
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def set_timezone(c, timezone):
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"""
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Set the system timezone to the given value, e.g. 'America/Chicago'.
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"""
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c.sudo("bash -c 'echo {} > /etc/timezone'".format(timezone))
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if is_link(c, '/etc/localtime'):
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c.sudo('ln --symbolic --force /usr/share/zoneinfo/{} /etc/localtime'.format(timezone))
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else:
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c.sudo('cp /usr/share/zoneinfo/{} /etc/localtime'.format(timezone))
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def put(c, local_path, remote_path, owner=None, mode=None,
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use_sudo=False, **kwargs):
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"""
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Put a file on the server, and set its ownership.
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"""
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# TODO: are we mirroring now?
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# if 'mode' not in kwargs:
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# kwargs.setdefault('mirror_local_mode', True)
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# upload file
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if use_sudo:
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tempdir = c.run('mktemp -d').stdout.strip()
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basename = os.path.basename(remote_path)
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temp_path = os.path.join(tempdir, basename)
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c.put(local_path, temp_path, **kwargs)
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# TODO: need to address single quotes within filename
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if not owner:
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c.sudo("chown root: '{}'".format(temp_path))
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c.sudo("mv '{}' '{}'".format(temp_path, remote_path))
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c.run('rmdir {}'.format(tempdir))
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else:
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c.put(local_path, remote_path, **kwargs)
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# set owner / mode if needed
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func = c.sudo if use_sudo else c.run
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if owner:
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if ':' not in owner:
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owner = '{}:'.format(owner)
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func("chown {} '{}'".format(owner, remote_path))
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if mode:
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func("chmod {} '{}'".format(mode, remote_path))
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def upload_mako_template(c, local_path, remote_path, context={},
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encoding='utf_8', **kwargs):
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"""
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Render a local file as a Mako template, and upload the result to the server.
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"""
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template = Template(filename=local_path)
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temp_dir = tempfile.mkdtemp(prefix='rattail-fabric.')
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temp_path = os.path.join(temp_dir, os.path.basename(local_path))
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text = template.render(**context)
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with open(temp_path, 'wt', encoding=encoding) as f:
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f.write(text)
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os.chmod(temp_path, os.stat(local_path).st_mode)
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put(c, temp_path, remote_path, **kwargs)
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os.remove(temp_path)
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os.rmdir(temp_dir)
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class Deployer(object):
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def __init__(self, deploy_path, last_segment='deploy'):
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if not os.path.isdir(deploy_path):
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deploy_path = os.path.abspath(os.path.join(os.path.dirname(deploy_path), last_segment))
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self.deploy_path = deploy_path
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def __call__(self, c, local_path, remote_path, **kwargs):
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self.deploy(c, local_path, remote_path, **kwargs)
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def full_path(self, local_path):
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return '{}/{}'.format(self.deploy_path, local_path)
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def local_exists(self, local_path):
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return os.path.exists(self.full_path(local_path))
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def deploy(self, c, local_path, remote_path, context={}, **kwargs):
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local_path = self.full_path(local_path)
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if local_path.endswith('.template'):
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raise NotImplementedError
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elif local_path.endswith('.mako'):
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upload_mako_template(c, local_path, remote_path, context=context, **kwargs)
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else:
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put(c, local_path, remote_path, **kwargs)
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def sudoers(self, c, local_path, remote_path, owner='root:', mode='0440', **kwargs):
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self.deploy(c, local_path, '/tmp/sudoers', owner=owner, mode=mode, use_sudo=True, **kwargs)
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c.sudo('mv /tmp/sudoers {}'.format(remote_path))
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def apache_site(self, c, local_path, name, **kwargs):
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from rattail_fabric2.apache import deploy_site
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kwargs['use_sudo'] = True
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deploy_site(c, self, local_path, name, **kwargs)
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def apache_conf(self, c, local_path, name, **kwargs):
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from rattail_fabric2.apache import deploy_conf
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kwargs['use_sudo'] = True
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deploy_conf(c, self, local_path, name, **kwargs)
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def backup_app(self, c, envname='backup', *args, **kwargs):
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from rattail_fabric2.backup import deploy_backup_app
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deploy_backup_app(c, self, envname, *args, **kwargs)
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def certbot_account(self, c, uuid, localdir='certbot/account'):
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"""
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Deploy files to establish a certbot account on target server
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"""
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from .util import exists
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localdir = localdir.rstrip('/')
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paths = [
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'/etc/letsencrypt/accounts',
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'/etc/letsencrypt/accounts/acme-v01.api.letsencrypt.org',
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'/etc/letsencrypt/accounts/acme-v01.api.letsencrypt.org/directory',
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]
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final_path = '{}/{}'.format(paths[-1], uuid)
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paths.append(final_path)
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if not exists(c, final_path, use_sudo=True):
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mkdir(c, paths, mode='0700', use_sudo=True)
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self.deploy(c, '{}/private_key.json'.format(localdir), '{}/private_key.json'.format(final_path), mode='0600', use_sudo=True)
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self.deploy(c, '{}/meta.json'.format(localdir), '{}/meta.json'.format(final_path), use_sudo=True)
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self.deploy(c, '{}/regr.json'.format(localdir), '{}/regr.json'.format(final_path), use_sudo=True)
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def soffice_daemon(self, c, local_path, name=None, register=True, start=True, **kwargs):
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"""
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Deploy a "soffice" (headless LibreOffice) daemon.
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"""
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if name is None:
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name = local_path.split('/')[-1]
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kwargs.setdefault('use_sudo', True)
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self.deploy(c, local_path, '/etc/init.d/{}'.format(name), **kwargs)
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if register:
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c.sudo('update-rc.d {} defaults'.format(name))
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if start:
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c.sudo('service {} restart'.format(name))
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def make_deploy(deploy_path, last_segment='deploy'):
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"""
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Make a ``deploy()`` function, for uploading files to the server.
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During a deployment, one usually needs to upload certain additional files
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to the server. It's also often necessary to dynamically define certain
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settings etc. within these files. The :func:`upload_template()` and
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:func:`put()` functions, respectively, handle uploading files which do and
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do not require dynamic variable substitution.
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The return value from ``make_deploy()`` is a function which will call
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``put()`` or ``upload_template()`` based on whether or not the file path
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ends with ``'.template'``.
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To make the ``deploy()`` function even simpler for the caller, it will
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assume a certain context for local file paths. This means one only need
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provide a base file name when calling ``deploy()``, and it will be
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interpreted as relative to the function's context path.
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The ``deploy_path`` argument is used to establish the context path for the
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function. If it is a folder path, it will be used as-is; otherwise it will
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be constructed by joining the parent folder of ``deploy_path`` with the
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value of ``last_segment``.
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Typical usage then is something like::
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from rattail_fabric import make_deploy
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deploy = make_deploy(__file__)
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deploy('rattail/init-filemon', '/etc/init.d/rattail-filemon',
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mode='0755')
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deploy('rattail/rattail.conf.template', '/etc/rattail.conf')
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This shows what is intended to be typical, i.e. where ``__file__`` is the
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only argument required for ``make_deploy()``. For the above to work will
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require you to have something like this file structure, where
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``fabfile.py`` is the script which contains the above code::
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myproject/
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|-- fabfile.py
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|-- deploy/
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`-- rattail/
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|-- init-filemon
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|-- rattail.conf.template
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"""
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return Deployer(deploy_path, last_segment)
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def rsync(c, host, *paths):
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"""
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Runs rsync as root, for the given host and file paths.
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"""
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for path in paths:
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assert path.startswith('/')
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path = path.rstrip('/')
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# escape path for rsync
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path = path.replace(' ', r'\\\ ').replace("'", r"\\\'")
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agent_sudo(c, 'rsync -aP --del root@{0}:{1}/ {1}'.format(host, path))
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