mirror of
https://github.com/thegeeklab/ansible-later.git
synced 2024-11-18 19:00:40 +00:00
167 lines
6.2 KiB
Python
167 lines
6.2 KiB
Python
# Based on the docker connection plugin
|
|
# Copyright (c) 2017 Ansible Project
|
|
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
|
|
#
|
|
# Connection plugin for building container images using buildah tool
|
|
# https://github.com/projectatomic/buildah
|
|
#
|
|
# Written by: Tomas Tomecek (https://github.com/TomasTomecek)
|
|
|
|
from __future__ import (absolute_import, division, print_function)
|
|
__metaclass__ = type
|
|
|
|
|
|
DOCUMENTATION = """
|
|
connection: buildah
|
|
short_description: Interact with an existing buildah container
|
|
description:
|
|
- Run commands or put/fetch files to an existing container using buildah tool.
|
|
author: Tomas Tomecek (ttomecek@redhat.com)
|
|
version_added: 2.4
|
|
options:
|
|
remote_addr:
|
|
description:
|
|
- The ID of the container you want to access.
|
|
default: inventory_hostname
|
|
vars:
|
|
- name: ansible_host
|
|
# keyword:
|
|
# - name: hosts
|
|
remote_user:
|
|
description:
|
|
- User specified via name or ID which is used to execute commands inside the container.
|
|
ini:
|
|
- section: defaults
|
|
key: remote_user
|
|
env:
|
|
- name: ANSIBLE_REMOTE_USER
|
|
vars:
|
|
- name: ansible_user
|
|
# keyword:
|
|
# - name: remote_user
|
|
"""
|
|
|
|
import shlex
|
|
import shutil
|
|
|
|
import subprocess
|
|
|
|
import ansible.constants as C
|
|
from ansible.module_utils._text import to_bytes, to_native
|
|
from ansible.plugins.connection import ConnectionBase, ensure_connect
|
|
|
|
|
|
try:
|
|
from __main__ import display
|
|
except ImportError:
|
|
from ansible.utils.display import Display
|
|
display = Display()
|
|
|
|
|
|
# this _has to be_ named Connection
|
|
class Connection(ConnectionBase):
|
|
"""
|
|
This is a connection plugin for buildah: it uses buildah binary to interact with the containers
|
|
"""
|
|
|
|
# String used to identify this Connection class from other classes
|
|
transport = 'buildah'
|
|
has_pipelining = True
|
|
become_methods = frozenset(C.BECOME_METHODS)
|
|
|
|
def __init__(self, play_context, new_stdin, *args, **kwargs):
|
|
super(Connection, self).__init__(play_context, new_stdin, *args, **kwargs)
|
|
|
|
self._container_id = self._play_context.remote_addr
|
|
self._connected = False
|
|
# container filesystem will be mounted here on host
|
|
self._mount_point = None
|
|
# `buildah inspect` doesn't contain info about what the default user is -- if it's not
|
|
# set, it's empty
|
|
self.user = self._play_context.remote_user
|
|
|
|
def _set_user(self):
|
|
self._buildah(b"config", [b"--user=" + to_bytes(self.user, errors='surrogate_or_strict')])
|
|
|
|
def _buildah(self, cmd, cmd_args=None, in_data=None):
|
|
"""
|
|
run buildah executable
|
|
|
|
:param cmd: buildah's command to execute (str)
|
|
:param cmd_args: list of arguments to pass to the command (list of str/bytes)
|
|
:param in_data: data passed to buildah's stdin
|
|
:return: return code, stdout, stderr
|
|
"""
|
|
local_cmd = ['buildah', cmd, '--', self._container_id]
|
|
if cmd_args:
|
|
local_cmd += cmd_args
|
|
local_cmd = [to_bytes(i, errors='surrogate_or_strict') for i in local_cmd]
|
|
|
|
display.vvv("RUN %s" % (local_cmd,), host=self._container_id)
|
|
p = subprocess.Popen(local_cmd, shell=False, stdin=subprocess.PIPE,
|
|
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
|
|
|
|
stdout, stderr = p.communicate(input=in_data)
|
|
stdout = to_bytes(stdout, errors='surrogate_or_strict')
|
|
stderr = to_bytes(stderr, errors='surrogate_or_strict')
|
|
return p.returncode, stdout, stderr
|
|
|
|
def _connect(self):
|
|
"""
|
|
no persistent connection is being maintained, mount container's filesystem
|
|
so we can easily access it
|
|
"""
|
|
super(Connection, self)._connect()
|
|
rc, self._mount_point, stderr = self._buildah("mount")
|
|
self._mount_point = self._mount_point.strip()
|
|
display.vvvvv("MOUNTPOINT %s RC %s STDERR %r" % (self._mount_point, rc, stderr))
|
|
self._connected = True
|
|
|
|
@ensure_connect
|
|
def exec_command(self, cmd, in_data=None, sudoable=False):
|
|
""" run specified command in a running OCI container using buildah """
|
|
super(Connection, self).exec_command(cmd, in_data=in_data, sudoable=sudoable)
|
|
|
|
# shlex.split has a bug with text strings on Python-2.6 and can only handle text strings on Python-3
|
|
cmd_args_list = shlex.split(to_native(cmd, errors='surrogate_or_strict'))
|
|
|
|
rc, stdout, stderr = self._buildah("run", cmd_args_list)
|
|
|
|
display.vvvvv("STDOUT %r STDERR %r" % (stderr, stderr))
|
|
return rc, stdout, stderr
|
|
|
|
def put_file(self, in_path, out_path):
|
|
""" Place a local file located in 'in_path' inside container at 'out_path' """
|
|
super(Connection, self).put_file(in_path, out_path)
|
|
display.vvv("PUT %s TO %s" % (in_path, out_path), host=self._container_id)
|
|
|
|
real_out_path = self._mount_point + to_bytes(out_path, errors='surrogate_or_strict')
|
|
shutil.copyfile(
|
|
to_bytes(in_path, errors='surrogate_or_strict'),
|
|
to_bytes(real_out_path, errors='surrogate_or_strict')
|
|
)
|
|
# alternatively, this can be implemented using `buildah copy`:
|
|
# rc, stdout, stderr = self._buildah(
|
|
# "copy",
|
|
# [to_bytes(in_path, errors='surrogate_or_strict'),
|
|
# to_bytes(out_path, errors='surrogate_or_strict')]
|
|
# )
|
|
|
|
def fetch_file(self, in_path, out_path):
|
|
""" obtain file specified via 'in_path' from the container and place it at 'out_path' """
|
|
super(Connection, self).fetch_file(in_path, out_path)
|
|
display.vvv("FETCH %s TO %s" % (in_path, out_path), host=self._container_id)
|
|
|
|
real_in_path = self._mount_point + to_bytes(in_path, errors='surrogate_or_strict')
|
|
shutil.copyfile(
|
|
to_bytes(real_in_path, errors='surrogate_or_strict'),
|
|
to_bytes(out_path, errors='surrogate_or_strict')
|
|
)
|
|
|
|
def close(self):
|
|
""" unmount container's filesystem """
|
|
super(Connection, self).close()
|
|
rc, stdout, stderr = self._buildah("umount")
|
|
display.vvvvv("RC %s STDOUT %r STDERR %r" % (rc, stdout, stderr))
|
|
self._connected = False
|