def get_vm_info():
cmd = 'ps ax -o "pid args" | grep "/bin/kvm" | grep "/var/lib/buildkit/vm"'
result = stacks.process(
cmd=cmd,
shell = True,
)
lines = result.stdout.split('\n')
instances = []
for line in lines:
if not line.strip() or cmd in line:
continue
parts = [part for part in line.strip().split(' ') if part]
pid = parts[0]
try:
image_arg = parts[18].split('=')[1].split(',')[0].split('/')[-2]
except:
image_arg = 'ERROR'
try:
net_arg = parts[22].split(',')[1].split('=')[1]
except:
net_arg = 'ERROR'
instance = stacks.obj(
pid = pid,
image = image_arg,
tunnel = net_arg
)
instances.append(instance)
return instances
def umount_image(path):
result = stacks.process(
'umount %s'%path,
shell=True,
)
if result.retcode:
raise Exception('Could not unmount the path %s. %s\n'%(path, result.stderr))
def create_tunnel(tunnel):
cmd = '''\
modprobe tun
tunctl -b -u root -t %(tunnel)s
brctl addif br0 %(tunnel)s
ifconfig %(tunnel)s up 0.0.0.0 promisc'''%dict(tunnel=tunnel)
result = stacks.process(cmd, shell=True, echo=True, merge=True)
return result
def create_bridge(interface, bridge_name, add=False):
cmd = "iptables -t nat -A POSTROUTING -o %s -j MASQUERADE" % interface
if add:
cmd += '\nbrctl addbr %s'%bridge_name
cmd += '\nifconfig %s 192.168.100.254 netmask 255.255.255.0 up'%bridge_name
cmd += '\necho "1" > /proc/sys/net/ipv4/ip_forward'
result = stacks.process(cmd, shell=True, echo=True, merge=True)
return result
def determine_interface(ip):
result = stacks.process(
"/sbin/ifconfig | grep -B 1 '%s' | grep -v '%s' | awk '{ print $1}'"%(ip, ip),
shell=True,
)
if result.retcode or result.stderr:
raise Exception('Could not determine the interface automatically, please use the --interface option')
interface = result.stdout.strip()
return interface
def gen_mac():
result = stacks.process(
r"dd if=/dev/urandom count=1 2>/dev/null | md5sum | sed 's/^\(..\)\(..\)\(..\)\(..\).*$/\1:\2:\3:\4/'",
shell=True,
)
if result.retcode or result.stderr:
raise Exception('Could not generate a mac address automatically, please use the --mac-address option')
mac = '52:54:'+result.stdout.strip()
return mac
def start_apt_cacher_ng_if_not_running():
cmd = '''\
APTCACHERNG=`ps aux | grep /usr/sbin/apt-cacher | grep -v grep`
if [ ! "$APTCACHERNG" ] ; then
echo "Starting apt-cacher-ng ..."
/etc/init.d/apt-cacher-ng start
echo "done."
fi
'''
result = stacks.process(cmd, shell=True, echo=True)
return result
def determine_ip():
result = stacks.process(
"/sbin/ifconfig $NETWORK_DEVICE | grep 'inet addr:' | cut -d: -f2 | awk '{ print $1}' | grep -v '127.0.0.1' | grep -v '192.168.100.' | grep -v '192.168.122.1'",
shell=True
)
exception = Exception('Could not determine the IP address, is the host connected to the internet? If so, please --ip option to specify the IP address manually')
if result.retcode or result.stderr:
raise exception
ip = result.stdout.strip().split('\n')[0]
if not valid_ip(ip):
raise exception
return ip
def clone(src, dst):
if '/' in src:
raise Exception('The src argument cannot contain a / character')
if '/' in dst:
raise Exception('The dst argument cannot contain a / character')
result = stacks.process(
[
'sudo', '-u', 'buildkit',
'cp', '-pr', '/var/lib/buildkit/vm/%s'%src, '/var/lib/buildkit/vm/%s'%dst,
],
)
return result
def run(cmd):
if os.geteuid() != 0:
cmd.err("This script must be run as root")
return 1
result = full_info([cmd.args[0]])
if result.error:
cmd.err(result.error)
return 2
serial = result.instances[0].serial
cmd.out('Connecting to %r ...', serial)
result = stacks.process(
[
'socat', '-', serial,
],
in_data = '\n\n',
)
def mount_image(image, path):
if not os.path.exists(path):
os.mkdir(path)
uid = pwd.getpwnam('buildkit')[2]
gid = grp.getgrnam('buildkit')[2]
os.chown(path, uid, gid)
files = os.listdir(path)
if files:
if len(files) > 1:
# Must be mounted
raise Exception('The VM already appears to be mounted at %r'%path)
umount_image(path)
elif len(files) > 0 and files[0] == 'vm.info':
os.remove(os.path.join(path, 'vm.info'))
else:
raise Exception('The %r directory is not empty'%path)
result = stacks.process(
'mount -t ext4 -o loop,offset=512 %s %s'%(image, path),
shell=True,
)
if result.retcode:
raise Exception('Could not mount the image %s. %s\n'%(image, result.stderr))
def get_bridge_info():
result = stacks.process(
[
'brctl', 'show',
],
)
lines = result.stdout.split('\n')
interfaces_pos = lines[0].find('interfaces')
tunnels = []
bridges = stacks.obj()
bridge = None
for line in lines[1:]:
new_bridge = line.split('\t')[0].strip()
if new_bridge:
bridge = new_bridge
if not bridges.has_key(bridge):
bridges[bridge] = []
tunnel = line.split('\t')[-1]
if tunnel:
bridges[bridge].append(tunnel)
tunnels.append(tunnel)
tunnels.sort()
return stacks.obj(bridges=bridges, tunnels=tunnels)
def run(cmd):
#if cmd.opts.wait_for_boot or cmd.opts.copy_dir:
# cmd.err('One of the options you\'ve chosen isn\'t implemented yet')
# return 1
if os.geteuid() != 0:
cmd.err("This script must be run as root")
return 1
extra = []
for c in cmd.args[1:]:
if c.strip() in ['-h', '--help']:
cmd.err('ERROR: Help flags must be specified before the image name NAME')
return 5
else:
extra.append(c)
if cmd.args[0] in [instance.image for instance in get_vm_info()]:
cmd.err('ERROR: The image %r is already in use', cmd.args[0])
return 4
# Make sure there isn't already a version of this image running
if not cmd.opts.ip:
cmd.err("No IP address available")
return 3
else:
cmd.out("Host IP is %s", cmd.opts.ip)
interface = determine_interface(cmd.opts.ip)
if not interface:
cmd.err("No network interface available")
return 2
else:
cmd.out("Network interface is %s", interface)
if cmd.opts.use_apt_proxy:
start_apt_cacher_ng_if_not_running()
bridge_info = get_bridge_info()
add = True
if cmd.opts.bridge_name in bridge_info.bridges.keys():
add = False
create_bridge(interface, cmd.opts.bridge_name, add=add)
tunnel = cmd.opts.tunnel
if tunnel is None:
tunnel = gen_tunnel(cmd.opts.bridge_name)
if add or tunnel not in bridge_info.bridges[cmd.opts.bridge_name]:
create_tunnel(tunnel)
path = "/var/lib/buildkit/vm/%s/vmtmp"%cmd.args[0]
mount_image("/var/lib/buildkit/vm/%s/disk.raw"%cmd.args[0], path)
update_image(cmd.args[0], cmd.opts.ip, use_apt_proxy=cmd.opts.use_apt_proxy)
for spec in cmd.opts.copy_file:
cmd.out('Copying %r to %r ...', spec.src, os.path.join(path, spec.dst[1:]))
shutil.copy2(spec.src, os.path.join(path, spec.dst[1:]))
cmd.out('done.')
fp = open(os.path.join(path, 'etc/buildkit_on_start.sh'), 'w')
fp.write('#!/bin/sh\n\n')
if cmd.opts.exec_on_boot:
fp.write(cmd.opts.exec_on_boot)
fp.close()
os.chmod(os.path.join(path, 'etc/buildkit_on_start.sh'), stat.S_IEXEC)
umount_image(path)
opts = cmd.opts.copy()
opts['tunnel'] = tunnel
cmd.out("Starting VM "+cmd.args[0]+" on %(tunnel)s to %(bridge_name)s with MAC %(mac_address)s ..."%opts)
#import signal
#class Alarm(Exception):
# pass
#def alarm_handler(signum, frame):
# raise Alarm
#signal.signal(signal.SIGALRM, alarm_handler)
#signal.alarm(1)
monitor = []
serial = []
def out(fh, stdin, output, exit):
pass
#while not monitor or not serial:
# print "out(%s %s %s)\n" %(monitor, serial, exit)
# line = fh.readline()
# if not line:
# exit.append(11)
# break
def err(fh, stdin, output, exit):
while not monitor or not serial:
#print "err(%s %s %s)\n" %(monitor, serial, exit)
line = fh.readline()
if not line:
exit.append(11)
break
#import pdb; pdb.set_trace()
if line.startswith('char device redirected to '):
device = line[len('char device redirected to '):-1]
if monitor:
serial.append(device)
else:
monitor.append(device)
else:
if not cmd.opts.no_console:
cmd.out(line)
output.write(line)
if monitor and serial:
exit.append(10)
if not cmd.opts.graphics:
extra.append('-nographic')
result = stacks.process(
[
'/usr/bin/kvm',
'-enable-kvm',
'-M', 'pc-0.12',
'-serial', 'pty',
'-monitor', 'pty',
#'-parallel', 'none',
#'-usb'
'-name', 'dev',
# Memory and CPU
'-m', cmd.opts.mem,
'-smp', cmd.opts.cpus,
# Drive options
'-boot', 'c',
'-drive', 'file=/var/lib/buildkit/vm/%s/disk.raw,if=ide,index=0,boot=on'%cmd.args[0],
# Network options
'-net', 'nic,macaddr=%s'%cmd.opts.mac_address,
'-net', 'tap,ifname=%s,script=no,downscript=no'%tunnel,
] + extra,
wait_for_retcode=False,
out=out,
err=err,
)
serial = serial[0]
monitor = monitor[0]
# Save the serial and monitor information
fp = open('/var/lib/buildkit/vm/%s/vmtmp/vm.info'%cmd.args[0], 'w')
fp.write('%s\n%s\n%s'%(result.pid, serial, monitor))
fp.close()
# Output some success messages
cmd.out('Started successfully with pid %r'%result.pid)
cmd.out('You can access the QEMU monitor for this VM like so:')
cmd.out(' $ sudo screen %s', monitor)
cmd.out('Once connected you should type \'Ctrl+a\' followed by \'k\' to leave the monitor. (Don\'t type \'quit\' as that will immediately exit the VM - akin to removing the power cable). If you are already running screen, you will need to type \'Ctrl+a a\' followed by k\' to quit the screen connected to %r.', serial)
cmd.out('You can connect to the VM\'s serial console like this:')
cmd.out(' $ sudo screen %s', serial)
cmd.out('Again you can exit the console with \'Ctrl+a\' followed by \'k\' (or \'Ctrl+a a\' followed by k\' if you are already in a screen session).')
if not cmd.opts.dont_wait:
def errfn(fh, stdin, output, exit):
pass
def outfn(fh, stdin, output, exit):
while not exit:
line = fh.readline()
if not cmd.opts.no_console:
cmd.out(line, end='')
output.write(line)
if cmd.opts.wait_message in line:
cmd.out("Found the wait message, exiting ...")
exit.append(0)
if not cmd.opts.no_console:
cmd.out('Connecting to the VM serial console ...')
result = stacks.process(
[
'socat', '-', serial,
],
out=outfn,
err=errfn,
wait_for_retcode=False,
)
cmd.out('done.')
def update_image(image, host_ip, use_apt_proxy=True):
path = "/var/lib/buildkit/vm/%s/vmtmp"%image
shutil.copyfile('/etc/resolv.conf', os.path.join(path, 'etc/resolv.conf'))
fp =open(os.path.join(path, 'etc/apt/apt.conf'), 'w')
if use_apt_proxy:
fp.write('Acquire::http { Proxy \"http://%s:3142/ubuntu\"; };'%host_ip)
else:
fp.write('')
fp.close()
fp = open(os.path.join(path, 'etc/buildkit_host_ip'), 'w')
fp.write(host_ip)
fp.close()
fp = open(os.path.join(path, 'etc/hosts'), 'r')
to_write = []
found = False
for line in fp.read().split('\n'):
if 'host.buildkit' in line:
if not found:
found = True
to_write.append("%s host.buildkit"%host_ip)
else:
to_write.append(line)
if not found:
to_write.append("%s host.buildkit"%host_ip)
fp.close()
fp = open(os.path.join(path, 'etc/hosts'), 'w')
fp.write('\n'.join(to_write))
fp.close()
fp = open(os.path.join(path, 'etc/init.d/buildkit_exec'), 'w')
fp.write('''\
#! /bin/sh
# /etc/init.d/buildkit_exec
#
# Carry out specific functions when asked to by the system
case "$1" in
start)
if [ -e "/etc/buildkit_on_start.sh" ] ; then
echo "Running custom buildkit on start script ..."
bash /etc/buildkit_on_start.sh
echo "done."
fi
echo "Buildkit exec_on_boot_completed"
;;
stop)
;;
*)
echo "Usage: /etc/init.d/blah {start|stop}"
exit 1
;;
esac
exit 0
''')
fp.close()
os.chmod(os.path.join(path, 'etc/init.d/buildkit_exec'), stat.S_IEXEC)
link_path = os.path.join(path, 'etc/rc2.d/S99buildkit_exec')
if os.path.lexists(link_path):
os.remove(link_path)
os.symlink(
'../init.d/buildkit_exec',
link_path,
)
fp = open(os.path.join(path, 'etc/init/ttyS0.conf'), 'w')
fp.write('''\
# ttyS0 - getty
#
# This service maintains a getty on ttyS0 from the point the system is
# started until it is shut down again.
start on stopped rc RUNLEVEL=[2345]
stop on runlevel [!2345]
respawn
exec /sbin/getty -L 38400 ttyS0 vt102
''')
fp.close()
fp = open(os.path.join(path, 'boot/grub/menu.lst'), 'r')
data = fp.read()
fp.close()
if "quiet splash" in data:
data = data.replace("quiet splash", "console=ttyS0,115200n8 console=tty0")
fp = open(os.path.join(path, 'boot/grub/menu.lst'), 'w')
fp.write(data)
fp.close()
# Now we need to enter a chroot and update the image
result = stacks.process(
[
'chroot',
path,
'update-grub',
],
echo=True,
merge=True,
)
if result.retcode:
raise Exception('Could not mount the image %s. %s\n'%(image, result.stderr))
def buildkit_apt_cache_installed():
cmd = '''dpkg -l | grep "ii buildkit-apt-cache"'''
result = stacks.process(cmd, shell=True, echo=True)
if result.stdout.strip():
return True
return False
def run(cmd):
if os.geteuid() != 0:
cmd.err("This script must be run as root")
return 1
vm_info = get_vm_info()
vm = None
for instance in vm_info:
if instance.image == cmd.args[0]:
vm = instance
if vm is None:
cmd.err('VM %r is not running'%cmd.args[0])
return 1
pts_info = parse_vm_info(vm.image)
if not pts_info.pid:
cmd.err('Could not obtain the monitor information for %r.'%cmd.args[0])
cmd.err('If can log in to the machine you should shut it down manually. Otherwise if you know the correct char device you can stop it like this:')
cmd.err(' $ echo "system_powerdown" | sudo socat - /dev/pts/XX')
cmd.err('Failing that you could forcibly kill the VMs pid %r', vm.pid)
return 2
cmd.out('Sending system powerdown command ...')
stacks.process(
'echo "system_powerdown" | sudo socat - %s'%pts_info.monitor,
shell=True,
)
cmd.out('done.')
if not cmd.opts.dont_wait:
serial = pts_info.serial
if serial != 'UNKNOWN':
def err(fh, stdin, output, exit):
pass
def out(fh, stdin, output, exit):
while not exit:
line = fh.readline()
if not cmd.opts.no_console:
cmd.out(line, end='')
output.write(line)
if 'Power down.' in line:
cmd.out("Found the wait message, exiting ...")
exit.append(0)
if not cmd.opts.no_console:
cmd.out('Connecting to the VM serial console ...')
result = stacks.process(
[
'socat', '-', serial,
],
out=out,
err=err,
)
cmd.out('done.')
cmd.out('Waiting for shutdown to complete ...', end='')
wait = True
while wait:
vm_info = get_vm_info()
found = False
cmd.out('.', end='')
for instance in vm_info:
if cmd.args[0] == instance.image:
found=True
break
if not found:
wait=False
else:
time.sleep(2)
cmd.out('\nShutdown complete.')
