mirror of
https://github.com/ansible-collections/community.general.git
synced 2024-09-14 20:13:21 +02:00
236 lines
8.3 KiB
Python
236 lines
8.3 KiB
Python
# -*- coding: utf-8 -*-
|
|
# (c) 2015, Joerg Thalheim <joerg@higgsboson.tk>
|
|
# Copyright (c) 2017 Ansible Project
|
|
# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
|
|
# SPDX-License-Identifier: GPL-3.0-or-later
|
|
|
|
from __future__ import (absolute_import, division, print_function)
|
|
__metaclass__ = type
|
|
|
|
DOCUMENTATION = '''
|
|
author: Joerg Thalheim (!UNKNOWN) <joerg@higgsboson.tk>
|
|
name: lxc
|
|
short_description: Run tasks in lxc containers via lxc python library
|
|
description:
|
|
- Run commands or put/fetch files to an existing lxc container using lxc python library
|
|
options:
|
|
remote_addr:
|
|
description:
|
|
- Container identifier
|
|
type: string
|
|
default: inventory_hostname
|
|
vars:
|
|
- name: inventory_hostname
|
|
- name: ansible_host
|
|
- name: ansible_lxc_host
|
|
executable:
|
|
default: /bin/sh
|
|
description:
|
|
- Shell executable
|
|
type: string
|
|
vars:
|
|
- name: ansible_executable
|
|
- name: ansible_lxc_executable
|
|
'''
|
|
|
|
import os
|
|
import shutil
|
|
import traceback
|
|
import select
|
|
import fcntl
|
|
import errno
|
|
|
|
HAS_LIBLXC = False
|
|
try:
|
|
import lxc as _lxc
|
|
HAS_LIBLXC = True
|
|
except ImportError:
|
|
pass
|
|
|
|
from ansible import errors
|
|
from ansible.module_utils.common.text.converters import to_bytes, to_native
|
|
from ansible.plugins.connection import ConnectionBase
|
|
|
|
|
|
class Connection(ConnectionBase):
|
|
""" Local lxc based connections """
|
|
|
|
transport = 'community.general.lxc'
|
|
has_pipelining = True
|
|
default_user = 'root'
|
|
|
|
def __init__(self, play_context, new_stdin, *args, **kwargs):
|
|
super(Connection, self).__init__(play_context, new_stdin, *args, **kwargs)
|
|
|
|
self.container_name = None
|
|
self.container = None
|
|
|
|
def _connect(self):
|
|
""" connect to the lxc; nothing to do here """
|
|
super(Connection, self)._connect()
|
|
|
|
if not HAS_LIBLXC:
|
|
msg = "lxc python bindings are not installed"
|
|
raise errors.AnsibleError(msg)
|
|
|
|
container_name = self.get_option('remote_addr')
|
|
if self.container and self.container_name == container_name:
|
|
return
|
|
|
|
self.container_name = container_name
|
|
|
|
self._display.vvv("THIS IS A LOCAL LXC DIR", host=self.container_name)
|
|
self.container = _lxc.Container(self.container_name)
|
|
if self.container.state == "STOPPED":
|
|
raise errors.AnsibleError("%s is not running" % self.container_name)
|
|
|
|
@staticmethod
|
|
def _communicate(pid, in_data, stdin, stdout, stderr):
|
|
buf = {stdout: [], stderr: []}
|
|
read_fds = [stdout, stderr]
|
|
if in_data:
|
|
write_fds = [stdin]
|
|
else:
|
|
write_fds = []
|
|
while len(read_fds) > 0 or len(write_fds) > 0:
|
|
try:
|
|
ready_reads, ready_writes, dummy = select.select(read_fds, write_fds, [])
|
|
except select.error as e:
|
|
if e.args[0] == errno.EINTR:
|
|
continue
|
|
raise
|
|
for fd in ready_writes:
|
|
in_data = in_data[os.write(fd, in_data):]
|
|
if len(in_data) == 0:
|
|
write_fds.remove(fd)
|
|
for fd in ready_reads:
|
|
data = os.read(fd, 32768)
|
|
if not data:
|
|
read_fds.remove(fd)
|
|
buf[fd].append(data)
|
|
|
|
(pid, returncode) = os.waitpid(pid, 0)
|
|
|
|
return returncode, b"".join(buf[stdout]), b"".join(buf[stderr])
|
|
|
|
def _set_nonblocking(self, fd):
|
|
flags = fcntl.fcntl(fd, fcntl.F_GETFL) | os.O_NONBLOCK
|
|
fcntl.fcntl(fd, fcntl.F_SETFL, flags)
|
|
return fd
|
|
|
|
def exec_command(self, cmd, in_data=None, sudoable=False):
|
|
""" run a command on the chroot """
|
|
super(Connection, self).exec_command(cmd, in_data=in_data, sudoable=sudoable)
|
|
|
|
# python2-lxc needs bytes. python3-lxc needs text.
|
|
executable = to_native(self.get_option('executable'), errors='surrogate_or_strict')
|
|
local_cmd = [executable, '-c', to_native(cmd, errors='surrogate_or_strict')]
|
|
|
|
read_stdout, write_stdout = None, None
|
|
read_stderr, write_stderr = None, None
|
|
read_stdin, write_stdin = None, None
|
|
|
|
try:
|
|
read_stdout, write_stdout = os.pipe()
|
|
read_stderr, write_stderr = os.pipe()
|
|
|
|
kwargs = {
|
|
'stdout': self._set_nonblocking(write_stdout),
|
|
'stderr': self._set_nonblocking(write_stderr),
|
|
'env_policy': _lxc.LXC_ATTACH_CLEAR_ENV
|
|
}
|
|
|
|
if in_data:
|
|
read_stdin, write_stdin = os.pipe()
|
|
kwargs['stdin'] = self._set_nonblocking(read_stdin)
|
|
|
|
self._display.vvv("EXEC %s" % (local_cmd), host=self.container_name)
|
|
pid = self.container.attach(_lxc.attach_run_command, local_cmd, **kwargs)
|
|
if pid == -1:
|
|
msg = "failed to attach to container %s" % self.container_name
|
|
raise errors.AnsibleError(msg)
|
|
|
|
write_stdout = os.close(write_stdout)
|
|
write_stderr = os.close(write_stderr)
|
|
if read_stdin:
|
|
read_stdin = os.close(read_stdin)
|
|
|
|
return self._communicate(pid,
|
|
in_data,
|
|
write_stdin,
|
|
read_stdout,
|
|
read_stderr)
|
|
finally:
|
|
fds = [read_stdout,
|
|
write_stdout,
|
|
read_stderr,
|
|
write_stderr,
|
|
read_stdin,
|
|
write_stdin]
|
|
for fd in fds:
|
|
if fd:
|
|
os.close(fd)
|
|
|
|
def put_file(self, in_path, out_path):
|
|
''' transfer a file from local to lxc '''
|
|
super(Connection, self).put_file(in_path, out_path)
|
|
self._display.vvv("PUT %s TO %s" % (in_path, out_path), host=self.container_name)
|
|
in_path = to_bytes(in_path, errors='surrogate_or_strict')
|
|
out_path = to_bytes(out_path, errors='surrogate_or_strict')
|
|
|
|
if not os.path.exists(in_path):
|
|
msg = "file or module does not exist: %s" % in_path
|
|
raise errors.AnsibleFileNotFound(msg)
|
|
try:
|
|
src_file = open(in_path, "rb")
|
|
except IOError:
|
|
traceback.print_exc()
|
|
raise errors.AnsibleError("failed to open input file to %s" % in_path)
|
|
try:
|
|
def write_file(args):
|
|
with open(out_path, 'wb+') as dst_file:
|
|
shutil.copyfileobj(src_file, dst_file)
|
|
try:
|
|
self.container.attach_wait(write_file, None)
|
|
except IOError:
|
|
traceback.print_exc()
|
|
msg = "failed to transfer file to %s" % out_path
|
|
raise errors.AnsibleError(msg)
|
|
finally:
|
|
src_file.close()
|
|
|
|
def fetch_file(self, in_path, out_path):
|
|
''' fetch a file from lxc to local '''
|
|
super(Connection, self).fetch_file(in_path, out_path)
|
|
self._display.vvv("FETCH %s TO %s" % (in_path, out_path), host=self.container_name)
|
|
in_path = to_bytes(in_path, errors='surrogate_or_strict')
|
|
out_path = to_bytes(out_path, errors='surrogate_or_strict')
|
|
|
|
try:
|
|
dst_file = open(out_path, "wb")
|
|
except IOError:
|
|
traceback.print_exc()
|
|
msg = "failed to open output file %s" % out_path
|
|
raise errors.AnsibleError(msg)
|
|
try:
|
|
def write_file(args):
|
|
try:
|
|
with open(in_path, 'rb') as src_file:
|
|
shutil.copyfileobj(src_file, dst_file)
|
|
finally:
|
|
# this is needed in the lxc child process
|
|
# to flush internal python buffers
|
|
dst_file.close()
|
|
try:
|
|
self.container.attach_wait(write_file, None)
|
|
except IOError:
|
|
traceback.print_exc()
|
|
msg = "failed to transfer file from %s to %s" % (in_path, out_path)
|
|
raise errors.AnsibleError(msg)
|
|
finally:
|
|
dst_file.close()
|
|
|
|
def close(self):
|
|
''' terminate the connection; nothing to do here '''
|
|
super(Connection, self).close()
|
|
self._connected = False
|