Add working --last-used-mac
{'create_vm': False, 'last_used_mac': True, 'get_new_mac': False, 'debug': False, 'conf_dir': '/home/nico/uncloud', 'etcd_host': 'etcd1.ungleich.ch', 'etcd_port': None, 'etcd_ca_cert': '/home/nico/vcs/ungleich-dot-cdist/files/etcd/ca.pem', 'etcd_cert_cert': '/home/nico/vcs/ungleich-dot-cdist/files/etcd/nico.pem', 'etcd_cert_key': '/home/nico/vcs/ungleich-dot-cdist/files/etcd/nico-key.pem'}
00:20:00:00:00:00
(venv) [19:02] diamond:uncloud% ./bin/uncloud-run-reinstall hack --etcd-host etcd1.ungleich.ch --etcd-ca-cert /home/nico/vcs/ungleich-dot-cdist/files/etcd/ca.pem --etcd-cert-cert /home/nico/vcs/ungleich-dot-cdist/files/etcd/nico.pem --etcd-cert-key /home/nico/vcs/ungleich-dot-cdist/files/etcd/nico-key.pem --last-used-mac
This commit is contained in:
Nico Schottelius
parent
1b36c2f96f
commit
8078ffae5a
4 changed files with 132 additions and 102 deletions
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@ -22,30 +22,75 @@
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import etcd3
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import json
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import logging
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from functools import wraps
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from uncloud import UncloudException
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log = logging.getLogger(__name__)
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def readable_errors(func):
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@wraps(func)
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def wrapper(*args, **kwargs):
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try:
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return func(*args, **kwargs)
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except etcd3.exceptions.ConnectionFailedError as e:
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raise UncloudException('Cannot connect to etcd: is etcd running and reachable? {}'.format(e))
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except etcd3.exceptions.ConnectionTimeoutError as e:
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raise UncloudException('etcd connection timeout. {}'.format(e))
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return wrapper
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class DB(object):
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def __init__(self, config):
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def __init__(self, config, prefix="/"):
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self.config = config
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self.prefix= '/nicohack/'
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# Root for everything
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self.base_prefix= '/nicohack'
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# Can be set from outside
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self.prefix = prefix
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self.connect()
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@readable_errors
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def connect(self):
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self._db_clients = []
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for endpoint in self.config.etcd_hosts:
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client = etcd3.client(host=endpoint, **self.config.etcd_args)
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self._db_clients.append(client)
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def get_value(self, key):
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pass
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def realkey(self, key):
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return "{}{}/{}".format(self.base_prefix,
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self.prefix,
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key)
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def set(self, key, value, store_as_json=False, **kwargs):
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if store_as_json:
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@readable_errors
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def get(self, key, as_json=False, **kwargs):
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value, _ = self._db_clients[0].get(self.realkey(key), **kwargs)
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if as_json:
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value = json.loads(value)
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return value
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@readable_errors
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def set(self, key, value, as_json=False, **kwargs):
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if as_json:
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value = json.dumps(value)
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key = "{}/{}".format(self.prefix, key)
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# FIXME: iterate over clients in case of failure ?
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return self._db_clients[0].put(key, value, **kwargs)
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return self._db_clients[0].put(self.realkey(key), value, **kwargs)
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@readable_errors
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def increment(key, **kwargs):
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with self._db_clients[0].lock(key) as lock:
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value = int(self.get(self.realkey(key), **kwargs))
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self.set(self.realkey(key), str(value + 1), **kwargs)
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if __name__ == '__main__':
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endpoints = [ "https://etcd1.ungleich.ch:2379",
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@ -25,93 +25,65 @@ import logging
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import os.path
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import os
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import re
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import json
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from uncloud import UncloudException
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from uncloud.hack.db import DB
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log = logging.getLogger(__name__)
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class Error(Exception):
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pass
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class Mac(object):
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def __init__(self):
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self.base_dir = "."
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class MAC(object):
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def __init__(self, config):
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self.config = config
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self.db = DB(config, prefix="/mac")
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self.prefix = 0x002000000000
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#self.prefix = "{:012x}".format(self._prefix)
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self.free = self.read_file("mac-free")
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self.last = self.read_file("mac-last")
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def read_file(self, filename):
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fname = os.path.join(self.base_dir, filename)
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ret = []
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try:
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with open(fname, "r") as fd:
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ret = fd.readlines()
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except Exception as e:
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pass
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return ret
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def append_to_file(self, text, filename):
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fname = os.path.join(self.base_dir, filename)
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with open(fname, "a+") as fd:
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fd.write("{}\n".format(text))
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@staticmethod
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def validate_mac(mac):
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if not re.match(r'([0-9A-F]{2}[-:]){5}[0-9A-F]{2}$', mac, re.I):
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raise Error("Not a valid mac address: %s" % mac)
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def free_append(self, mac):
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if mac in self.free:
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raise Error("Mac already in free database: %s" % mac)
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self.append_to_file(mac, "mac-free")
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self.free = self.read_file("mac-free")
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def last_used_index(self):
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value = self.db.get("last_used_index")
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if not value:
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return 0
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return int(value)
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def last_used_mac(self):
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return self.int_to_mac(self.prefix + self.last_used_index())
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@staticmethod
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def int_to_mac(number):
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b = number.to_bytes(6, byteorder="big")
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return ':'.join(format(s, '02x') for s in b)
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def getnext(self):
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def get_next(self, vmuuid=None, as_int=False):
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# if self.free:
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# return self.free.pop()
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# if not self.prefix:
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# raise Error("Cannot generate address without prefix - use prefix-set")
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last_number = self.last_used_index()
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if self.last:
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last_number = int(self.last[0], 16)
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if last_number == int('0xffffff', 16):
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raise Error("Exhausted all possible mac addresses - try to free some")
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next_number = last_number + 1
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else:
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next_number = 0
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# FIXME: compare to 48bit minus prefix length
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if last_number == int('0xffffff', 16):
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raise UncloudException("Exhausted all possible mac addresses - try to free some")
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next_number = last_number + 1
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next_number_string = "{:012x}".format(next_number)
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next_mac_number = self.prefix + next_number
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next_mac = self.int_to_mac(next_mac_number)
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with open(os.path.join(self.base_dir, "mac-last"), "w+") as fd:
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fd.write("{}\n".format(next_number_string))
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db_entry = {}
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db_entry['vm_uuid'] = vmuuid
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db_entry['index'] = next_number
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db_entry['mac_address'] = next_mac
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return next_mac
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self.db.set("used/{}".format(next_mac),
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db_entry)
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@classmethod
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def commandline(cls):
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pass
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if __name__ == '__main__':
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m = Mac()
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m.commandline()
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# print(m.free)
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#print(m.last)
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print(m.getnext())
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if as_int:
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return next_mac_number
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else:
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return next_mac
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@ -2,10 +2,13 @@ import argparse
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from uncloud.hack.vm import VM
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from uncloud.hack.config import Config
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from uncloud.hack.mac import MAC
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arg_parser = argparse.ArgumentParser('hack', add_help=False)
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#description="Commands that are unfinished - use at own risk")
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arg_parser.add_argument('--create-vm', action='store_true')
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arg_parser.add_argument('--last-used-mac', action='store_true')
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arg_parser.add_argument('--get-new-mac', action='store_true')
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def main(arguments):
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@ -16,3 +19,11 @@ def main(arguments):
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print("Creating VM")
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vm = VM(config)
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vm.create()
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if arguments['last_used_mac']:
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m = MAC(config)
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print(m.last_used_mac())
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if arguments['get_new_mac']:
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m = MAC(config).get_next()
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print(m.last_used())
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@ -25,48 +25,50 @@ import uuid
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import os
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from uncloud.hack.db import DB
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from uncloud.hack.mac import MAC
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class VM(object):
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def __init__(self, config):
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self.config = config
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self.db = DB(config)
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def __init__(self, config):
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self.config = config
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self.db = DB(config, prefix="/vm")
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self.hackprefix="/home/nico/vcs/uncloud/uncloud/hack/hackcloud"
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self.qemu="/usr/bin/qemu-system-x86_64"
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self.hackprefix="/home/nico/vcs/uncloud/uncloud/hack/hackcloud"
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self.qemu="/usr/bin/qemu-system-x86_64"
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self.accel="kvm"
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self.vm = {}
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self.vm = {}
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self.accel="kvm"
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# self.mac=$(./mac-gen.py)
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self.mac="42:00:00:00:00:42"
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self.owner="nico"
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self.bridge="br100"
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self.owner="nico"
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self.bridge="br100"
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self.ifup = os.path.join(self.hackprefix, "ifup.sh")
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self.ifdown = os.path.join(self.hackprefix, "ifdown.sh")
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self.ifup = os.path.join(self.hackprefix, "ifup.sh")
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self.ifdown = os.path.join(self.hackprefix, "ifdown.sh")
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self.uuid = uuid.uuid4()
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self.vm['uuid'] = str(self.uuid)
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self.vm['memory']=1024
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self.vm['cores']=2
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self.vm['os_image'] = os.path.join(self.hackprefix, "alpine-virt-3.11.2-x86_64.iso")
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def create(self):
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self.uuid = uuid.uuid4()
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self.vm['uuid'] = str(self.uuid)
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self.vm['memory'] = 1024
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self.vm['cores'] = 2
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self.vm['os_image'] = os.path.join(self.hackprefix, "alpine-virt-3.11.2-x86_64.iso")
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self.vm['commandline' ] = [ "sudo",
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"{}".format(self.qemu),
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"-name", "uncloud-{}".format(self.vm['uuid']),
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"-machine", "pc,accel={}".format(self.accel),
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"-m", "{}".format(self.vm['memory']),
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"-smp", "{}".format(self.vm['cores']),
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"-uuid", "{}".format(self.vm['uuid']),
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"-drive", "file={},media=cdrom".format(self.vm['os_image']),
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"-netdev", "tap,id=netmain,script={},downscript={}".format(self.ifup, self.ifdown),
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"-device", "virtio-net-pci,netdev=netmain,id=net0,mac={}".format(self.mac)
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]
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self.mac=MAC().next()
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def create(self):
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self.db.set("vm/{}".format(str(self.vm['uuid'])),
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self.vm, store_as_json=True)
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self.vm['commandline' ] = [ "sudo",
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"{}".format(self.qemu),
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"-name", "uncloud-{}".format(self.vm['uuid']),
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"-machine", "pc,accel={}".format(self.accel),
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"-m", "{}".format(self.vm['memory']),
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"-smp", "{}".format(self.vm['cores']),
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"-uuid", "{}".format(self.vm['uuid']),
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"-drive", "file={},media=cdrom".format(self.vm['os_image']),
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"-netdev", "tap,id=netmain,script={},downscript={}".format(self.ifup, self.ifdown),
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"-device", "virtio-net-pci,netdev=netmain,id=net0,mac={}".format(self.mac)
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]
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print(" ".join(self.vm['commandline']))
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subprocess.run(self.vm['commandline'])
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self.db.set(str(self.vm['uuid']),
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self.vm,
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as_json=True)
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print(" ".join(self.vm['commandline']))
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subprocess.run(self.vm['commandline'])
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