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#!/usr/bin/python3
import sys
import time
import pylxd
from pylxd import Client
# FIXME versions
package_replacements = {
'19.07': {
'bird4': 'bird1-ipv4',
'bird4-uci': 'bird1-ipv4-uci',
'birdc4': 'bird1c-ipv4',
'birdcl4': 'bird1cl-ipv4',
'bird6': 'bird1-ipv6',
'bird6-uci': 'bird1-ipv6-uci',
'birdc6': 'bird1c-ipv6',
'birdcl6': 'bird1cl-ipv6',
},
}
# FIXME input version
def old_to_new_package(name):
if name in package_replacements:
return package_replacements[name]
else:
return name
class ExecuteError(RuntimeError):
def __init__(self, command, exit_code):
self.command = command
self.exit_code = exit_code
def __str__(self):
return 'Command "%s" exit code %d' % (' '.join(self.command), self.exit_code)
def find_source_image(client, image):
try:
client.images.get_by_alias(image)
return {'type': 'image', 'alias': image}
except pylxd.exceptions.NotFound as e:
if len(image) >= 12:
client.images.get(image)
return {'type': 'image', 'fingerprint': image}
else:
raise
def copy_config(old, new):
new.devices = old.devices
new.description = old.description
new.profiles = old.profiles
new_config = new.config
for key, value in old.config.items():
if key.endswith("hwaddr"):
new_config[key] = value
# for key, value in new_config.items():
# print("%s %s" % (key, value))
new.config = new_config
def log_stdout(message):
print(message, end='', flush=True)
def log_stderr(message):
print(message, end='', file=sys.stderr, flush=True)
class Container:
def __init__(self, container):
self.container = container
def __getattr__(self, name):
return self.container.__getattribute__(name)
def __setattr__(self, name, value):
if name not in ('container'):
self.container.__setattr__(name, value)
else:
super(Container, self).__setattr__(name, value)
def execute_with_output(self, command, *args, **kwargs):
extra_args={}
if 'stderr_handler' not in kwargs:
extra_args['stderr_handler'] = log_stderr
(exit_code, stdout, stderr) = self.container.execute(command, *args, **kwargs, **extra_args)
if exit_code != 0:
raise ExecuteError(command, exit_code)
return stdout
def execute(self, command, *args, **kwargs):
extra_args={}
if 'stdout_handler' not in kwargs:
extra_args['stdout_handler'] = log_stdout
self.execute_with_output(command, *args, **kwargs, **extra_args)
def execute_retry(self, command, retries, *args, **kwargs):
for i in range(retries + 1):
try:
self.execute(command, *args, **kwargs)
except ExecuteError as e:
if i == retries:
raise
continue
return
raise NotImplementedError()
def ping(self, dest):
self.execute_retry(['ping', '-c', '1', '-q', dest], 2,
stdout_handler=None)
def sysupgrade_backup(self, ):
return self.execute_with_output(['sysupgrade', '-b', '-'],
decode=False)
def sysupgrade_restore(self, data):
self.execute(['sysupgrade', '-r', '-'],
stdin_payload=data, decode=False)
def opkg_list_installed(self, ):
return self.execute_with_output(['opkg', 'list-installed'])
def opkg_update(self):
print("Update")
self.execute(['opkg', 'update'])
def opkg_install(self, packages):
print("Installing %s" % packages)
self.execute(['opkg', 'install'] + packages)
def opkg_remove(self, packages):
print("Removing %s" % packages)
self.execute(['opkg', 'remove'] + packages)
def _package_set_from_str(self, s):
print("_package_set_from_str ", type(s))
old_list = s.split('\n')
old_packages = []
i = 1
for l in old_list:
i = i + 1
res = l.split(' ')
if len(res) == 3:
(name, _, version) = res
old_packages.append(name)
return frozenset([ old_to_new_package(i) for i in old_packages ])
def package_set(self):
return self._package_set_from_str(self.opkg_list_installed())
def orig_package_set(self):
return self._package_set_from_str(self.container.files.get('/etc/openwrt_manifest').decode('ascii'))
def usage(argv):
print("Usage:", argv[0], "<old container> <new container> <image>")
exit(1)
def main(argv):
is_allow_existing = True
if len(argv) == 4:
pos = 1
else:
usage(argv)
old_name = argv[pos]; pos=pos+1
new_name = argv[pos]; pos=pos+1
new_image = argv[pos]; pos=pos+1
client = Client()
old = Container(client.containers.get(old_name))
if old.status == 'Stopped':
print("Start", old_name)
old.start(wait=True)
new_source = find_source_image(client, new_image)
new_config = {'name': new_name, 'source': new_source}
if is_allow_existing and client.containers.exists(new_name):
new = Container(client.containers.get(new_name))
else:
print("Create", new_name, new_config)
new = Container(client.containers.create(new_config, wait=True))
if new.status == 'Stopped':
print("Start", new_name)
new.start(wait=True)
print("Ping downloads.openwrt.org")
new.ping('downloads.openwrt.org')
print("Update package list")
new.opkg_update()
orig_set = old.orig_package_set()
old_set = old.package_set()
new_set = new.package_set()
del_set = orig_set.difference(old_set)
del_packages = list(del_set)
add_packages = list(old_set.difference(new_set).difference(['iw']).difference(del_set))
if len(del_packages) > 0:
print("Remove", del_packages)
new.opkg_remove(del_packages)
else:
print("No packages uninstalled")
if len(add_packages) > 0:
print("Install", add_packages)
new.opkg_install(add_packages)
else:
print("No packages installed")
print("Backup", old_name)
backup_data = old.sysupgrade_backup()
print("Restore", new_name)
new.sysupgrade_restore(backup_data)
print("Stop", old_name)
old.stop(wait=True)
print("Stop", new_name)
new.stop(wait=True)
print("Copy config")
copy_config(old, new)
new.save()
print("Wait 2s")
time.sleep(2)
print("Start", new_name)
new.start(wait=True)
print("Finished")
if __name__ == '__main__':
main(sys.argv)
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