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# (c) 2016 Matt Clay <matt@mystile.com>
# (c) 2017 Ansible Project
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
"""
DOCUMENTATION:
author: Matt Clay <matt@mystile.com>
connection: lxd
short_description: Run tasks in lxc containers via lxc CLI
description:
- Run commands or put/fetch files to an existing lxc container using lxc CLI
version_added: "2.0"
options:
remote_addr:
description:
- Container identifier
default: The set user as per docker's configuration
vars:
- name: ansible_host
- name: ansible_lxd_host
executable:
description:
- shell to use for execution inside container
default: /bin/sh
vars:
- name: ansible_executable
- name: ansible_lxd_executable
"""
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
import os
from distutils.spawn import find_executable
from subprocess import call, Popen, PIPE
from ansible.errors import AnsibleError, AnsibleConnectionFailure, AnsibleFileNotFound
from ansible.module_utils._text import to_bytes, to_text
from ansible.plugins.connection import ConnectionBase
class Connection(ConnectionBase):
""" lxd based connections """
transport = "lxd"
has_pipelining = True
def __init__(self, play_context, new_stdin, *args, **kwargs):
super(Connection, self).__init__(play_context, new_stdin, *args, **kwargs)
self._host = self._play_context.remote_addr
self._lxc_cmd = find_executable("lxc")
if not self._lxc_cmd:
raise AnsibleError("lxc command not found in PATH")
if self._play_context.remote_user is not None and self._play_context.remote_user != 'root':
self._display.warning('lxd does not support remote_user, using container default: root')
def _connect(self):
"""connect to lxd (nothing to do here) """
super(Connection, self)._connect()
if not self._connected:
self._display.vvv(u"ESTABLISH LXD CONNECTION FOR USER: root", host=self._host)
self._connected = True
def exec_command(self, cmd, in_data=None, sudoable=True):
""" execute a command on the lxd host """
super(Connection, self).exec_command(cmd, in_data=in_data, sudoable=sudoable)
self._display.vvv(u"EXEC {0}".format(cmd), host=self._host)
local_cmd = [self._lxc_cmd, "exec", self._host, "--", self._play_context.executable, "-c", cmd]
local_cmd = [to_bytes(i, errors='surrogate_or_strict') for i in local_cmd]
in_data = to_bytes(in_data, errors='surrogate_or_strict', nonstring='passthru')
process = Popen(local_cmd, stdin=PIPE, stdout=PIPE, stderr=PIPE)
stdout, stderr = process.communicate(in_data)
stdout = to_text(stdout)
stderr = to_text(stderr)
if stderr == "error: Container is not running.\n":
raise AnsibleConnectionFailure("container not running: %s" % self._host)
if stderr == "error: not found\n":
raise AnsibleConnectionFailure("container not found: %s" % self._host)
return process.returncode, stdout, stderr
def put_file(self, in_path, out_path):
""" put a file from local to lxd """
super(Connection, self).put_file(in_path, out_path)
self._display.vvv(u"PUT {0} TO {1}".format(in_path, out_path), host=self._host)
if not os.path.isfile(to_bytes(in_path, errors='surrogate_or_strict')):
raise AnsibleFileNotFound("input path is not a file: %s" % in_path)
local_cmd = [self._lxc_cmd, "file", "push", in_path, self._host + "/" + out_path]
local_cmd = [to_bytes(i, errors='surrogate_or_strict') for i in local_cmd]
call(local_cmd)
def fetch_file(self, in_path, out_path):
""" fetch a file from lxd to local """
super(Connection, self).fetch_file(in_path, out_path)
self._display.vvv(u"FETCH {0} TO {1}".format(in_path, out_path), host=self._host)
local_cmd = [self._lxc_cmd, "file", "pull", self._host + "/" + in_path, out_path]
local_cmd = [to_bytes(i, errors='surrogate_or_strict') for i in local_cmd]
call(local_cmd)
def close(self):
""" close the connection (nothing to do here) """
super(Connection, self).close()
self._connected = False
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