Testing OpenStack upgrades
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"""Exported method Container.start()."""
from __future__ import absolute_import
import logging
import os
import select
import signal
import socket
import sys
import termios
import tty
CONMON_BUFSZ = 8192
class Mixin:
"""Publish start() for inclusion in Container class."""
def start(self):
"""Start container, return container on success.
Will block if container has been detached.
"""
# pylint: disable=protected-access
with self._client() as podman:
logging.debug('Starting Container "%s"', self._id)
results = podman.StartContainer(self._id)
logging.debug('Started Container "%s"', results['container'])
if not hasattr(self, 'pseudo_tty') or self.pseudo_tty is None:
return self._refresh(podman)
logging.debug('Setting up PseudoTTY for Container "%s"',
results['container'])
try:
# save off the old settings for terminal
tcoldattr = termios.tcgetattr(self.pseudo_tty.stdin)
tty.setraw(self.pseudo_tty.stdin)
# initialize container's window size
self.resize_handler(None, sys._getframe(0))
# catch any resizing events and send the resize info
# to the control fifo "socket"
signal.signal(signal.SIGWINCH, self.resize_handler)
except termios.error:
tcoldattr = None
try:
# TODO: Is socket.SOCK_SEQPACKET supported in Windows?
with socket.socket(socket.AF_UNIX,
socket.SOCK_SEQPACKET) as skt:
# Prepare socket for use with conmon/container
skt.connect(self.pseudo_tty.io_socket)
sources = [skt, self.pseudo_tty.stdin]
while sources:
logging.debug('Waiting on sources: %s', sources)
readable, _, _ = select.select(sources, [], [])
if skt in readable:
data = skt.recv(CONMON_BUFSZ)
if data:
# Remove source marker when writing
os.write(self.pseudo_tty.stdout, data[1:])
else:
sources.remove(skt)
if self.pseudo_tty.stdin in readable:
data = os.read(self.pseudo_tty.stdin, CONMON_BUFSZ)
if data:
skt.sendall(data)
if self.pseudo_tty.eot in data:
sources.clear()
else:
sources.remove(self.pseudo_tty.stdin)
finally:
if tcoldattr:
termios.tcsetattr(self.pseudo_tty.stdin, termios.TCSADRAIN,
tcoldattr)
signal.signal(signal.SIGWINCH, signal.SIG_DFL)
return self._refresh(podman)