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# This file is part of cloud-init. See LICENSE file for license information.
"""Base NoCloud KVM instance."""
import os
import paramiko
import socket
import subprocess
import time
from cloudinit import util as c_util
from tests.cloud_tests.instances import base
from tests.cloud_tests import util
# This domain contains reverse lookups for hostnames that are used.
# The primary reason is so sudo will return quickly when it attempts
# to look up the hostname. i9n is just short for 'integration'.
# use i9n.brickies.net until i9n.cloud-init.io is popualted:
# https://portal.admin.canonical.com/107125
CI_DOMAIN = "i9n.brickies.net"
class NoCloudKVMInstance(base.Instance):
"""NoCloud KVM backed instance."""
platform_name = "nocloud-kvm"
_ssh_client = None
def __init__(self, platform, name, properties, config, features,
user_data, meta_data):
"""Set up instance.
@param platform: platform object
@param name: image path
@param properties: dictionary of properties
@param config: dictionary of configuration values
@param features: dictionary of supported feature flags
"""
self.user_data = user_data
self.meta_data = meta_data
self.ssh_key_file = os.path.join(platform.config['data_dir'],
platform.config['private_key'])
self.ssh_port = None
self.pid = None
self.pid_file = None
self.console_file = None
super(NoCloudKVMInstance, self).__init__(
platform, name, properties, config, features)
def destroy(self):
"""Clean up instance."""
if self.pid:
try:
c_util.subp(['kill', '-9', self.pid])
except util.ProcessExectuionError:
pass
if self.pid_file:
os.remove(self.pid_file)
self.pid = None
if self._ssh_client:
self._ssh_client.close()
self._ssh_client = None
super(NoCloudKVMInstance, self).destroy()
def _execute(self, command, stdin=None, env=None):
env_args = []
if env:
env_args = ['env'] + ["%s=%s" for k, v in env.items()]
return self.ssh(['sudo'] + env_args + list(command), stdin=stdin)
def generate_seed(self, tmpdir):
"""Generate nocloud seed from user-data"""
seed_file = os.path.join(tmpdir, '%s_seed.img' % self.name)
user_data_file = os.path.join(tmpdir, '%s_user_data' % self.name)
with open(user_data_file, "w") as ud_file:
ud_file.write(self.user_data)
c_util.subp(['cloud-localds', seed_file, user_data_file])
return seed_file
def get_free_port(self):
"""Get a free port assigned by the kernel."""
s = socket.socket()
s.bind(('', 0))
num = s.getsockname()[1]
s.close()
return num
def ssh(self, command, stdin=None):
"""Run a command via SSH."""
client = self._ssh_connect()
cmd = util.shell_pack(command)
try:
fp_in, fp_out, fp_err = client.exec_command(cmd)
channel = fp_in.channel
if stdin is not None:
fp_in.write(stdin)
fp_in.close()
channel.shutdown_write()
rc = channel.recv_exit_status()
return (fp_out.read(), fp_err.read(), rc)
except paramiko.SSHException as e:
raise util.InTargetExecuteError(
b'', b'', -1, command, self.name, reason=e)
def _ssh_connect(self, hostname='localhost', username='ubuntu',
banner_timeout=120, retry_attempts=30):
"""Connect via SSH."""
if self._ssh_client:
return self._ssh_client
private_key = paramiko.RSAKey.from_private_key_file(self.ssh_key_file)
client = paramiko.SSHClient()
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
while retry_attempts:
try:
client.connect(hostname=hostname, username=username,
port=self.ssh_port, pkey=private_key,
banner_timeout=banner_timeout)
self._ssh_client = client
return client
except (paramiko.SSHException, TypeError):
time.sleep(1)
retry_attempts = retry_attempts - 1
error_desc = 'Failed command to: %s@%s:%s' % (username, hostname,
self.ssh_port)
raise util.InTargetExecuteError('', '', -1, 'ssh connect',
self.name, error_desc)
def start(self, wait=True, wait_for_cloud_init=False):
"""Start instance."""
tmpdir = self.platform.config['data_dir']
seed = self.generate_seed(tmpdir)
self.pid_file = os.path.join(tmpdir, '%s.pid' % self.name)
self.console_file = os.path.join(tmpdir, '%s-console.log' % self.name)
self.ssh_port = self.get_free_port()
cmd = ['./tools/xkvm',
'--disk', '%s,cache=unsafe' % self.name,
'--disk', '%s,cache=unsafe' % seed,
'--netdev', ','.join(['user',
'hostfwd=tcp::%s-:22' % self.ssh_port,
'dnssearch=%s' % CI_DOMAIN]),
'--', '-pidfile', self.pid_file, '-vnc', 'none',
'-m', '2G', '-smp', '2', '-nographic',
'-serial', 'file:' + self.console_file]
subprocess.Popen(cmd,
close_fds=True,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
while not os.path.exists(self.pid_file):
time.sleep(1)
with open(self.pid_file, 'r') as pid_f:
self.pid = pid_f.readlines()[0].strip()
if wait:
self._wait_for_system(wait_for_cloud_init)
def console_log(self):
if not self.console_file:
return b''
with open(self.console_file, "rb") as fp:
return fp.read()
# vi: ts=4 expandtab
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