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#!/usr/bin/env python2.7
# Copyright 2012 Canonical Ltd. This software is licensed under the
# GNU Affero General Public License version 3 (see the file LICENSE).
"""Setup a Virtual Data-center Environment."""
from __future__ import (
absolute_import,
print_function,
unicode_literals,
)
__metaclass__ = type
import os
import re
import subprocess
import sys
import xmlrpclib
from Cheetah.Template import Template
import libvirt
import yaml
NODES_RANGE = range(1,4)
def yaml_loadf(fname):
fp = open(fname)
ret = yaml.load(fp)
fp.close()
return(ret)
class Domain:
def __init__(self, syscfg, ident, basedir=None):
self.ip_pre = syscfg['network']['ip_pre']
if basedir == None:
basedir = os.path.abspath(os.curdir)
self.basedir = basedir
self._setcfg(syscfg,ident)
self.network = syscfg['network']['name']
def __repr__(self):
return("== %s ==\n ip: %s\n mac: %s\n template: %s\n" %
(self.name, self.ipaddr, self.mac, self.template))
@property
def ipaddr(self):
return("%s.%s" % (self.ip_pre, self.ipnum))
@property
def disk0(self):
return("%s/%s-disk0.img" % (self.basedir, self.name))
def dictInfo(self):
ret = vars(self)
# have to add the getters
for prop in ( "ipaddr", "disk0" ):
ret[prop] = getattr(self,prop)
return ret
def toLibVirtXml(self):
template = Template(file=self.template, searchList=[self.dictInfo()])
return template.respond()
class Node(Domain):
def _setcfg(self, cfg, num):
cfg = cfg['nodes']
self.name = "%s%02i" % (cfg['prefix'],num)
self.mac = "%s:%02x" % (cfg['mac_pre'],num)
self.ipnum = num + 100
self.template = cfg['template']
self.mem = cfg['mem'] * 1024
return
class System(Domain):
def _setcfg(self, cfg, ident):
cfg = cfg['systems'][ident]
self.name = ident
self.mac = cfg['mac']
self.ipnum = cfg['ip']
self.template = cfg['template']
self.mem = cfg['mem'] * 1024
def renderSysDom(config, syscfg, stype="node"):
template = Template(file=syscfg['template'], searchList=[config, syscfg])
return template.respond()
# cobbler:
# ip: 2 # ip address must be in dhcp range
# mac: 00:16:3e:3e:a9:1a
# template: libvirt-system.tmpl
# mem: 524288
#
#nodes:
# prefix: node
# mac_pre: 00:16:3e:3e:aa
# mam: 256
def writeDomXmlFile(dom, outpre=""):
fname="%s%s.xml" % (outpre, dom.name)
output = open(fname,"w")
output.write(dom.toLibVirtXml())
output.close()
return fname
def libvirt_setup(config):
conn = libvirt.open("qemu:///system")
netname = config['network']['name']
if netname in conn.listDefinedNetworks() or netname in conn.listNetworks():
net = conn.networkLookupByName(netname)
if net.isActive():
net.destroy()
net.undefine()
allsys = {}
for system in config['systems']:
d = System(config, system)
allsys[d.name]=d.dictInfo()
for num in NODES_RANGE:
d = Node(config, num)
allsys[d.name]=d.dictInfo()
conn.networkDefineXML(Template(file=config['network']['template'],
searchList=[config['network'],
{'all_systems': allsys }]).respond())
print("defined network %s " % netname)
cob = System(config, "zimmer")
systems = [ cob ]
for node in NODES_RANGE:
systems.append(Node(config, node))
qcow_create = "qemu-img create -f qcow2 %s 2G"
defined_systems = conn.listDefinedDomains()
for system in systems:
if system.name in defined_systems:
dom = conn.lookupByName(system.name)
if dom.isActive():
dom.destroy()
dom.undefine()
conn.defineXML(system.toLibVirtXml())
if isinstance(system,Node):
subprocess.check_call(qcow_create % system.disk0, shell=True)
print("defined domain %s" % system.name)
def cobbler_addsystem(server, token, system, profile, hostip):
eth0 = {
"macaddress-eth0" : system.mac,
"ipaddress-eth0" : system.ipaddr,
"static-eth0" : False,
}
items = {
'name': system.name,
'hostname': system.name,
'power_address': "qemu+tcp://%s:65001" % hostip,
'power_id': system.name,
'power_type': "virsh",
'profile': profile,
'netboot_enabled': True,
'modify_interface': eth0,
}
if len(server.find_system({"name": system.name})):
server.remove_system(system.name,token)
server.update()
print("removed existing %s" % system.name)
sid = server.new_system(token)
for key, val in items.iteritems():
ret = server.modify_system(sid, key, val, token)
if not ret:
raise Exception("failed for %s [%s]: %s, %s" %
(system.name, ret, key, val))
ret = server.save_system(sid,token)
if not ret:
raise Exception("failed to save %s" % system.name)
print("added %s" % system.name)
def get_profile_arch():
"""Get the system architecture for use in the cobbler setup profile."""
# This should, for any given system, match what the zimmer-build
# script does to determine the right architecture.
arch_text = subprocess.check_output(['/bin/uname', '-m']).strip()
if re.match('i.86', arch_text):
return 'i386'
else:
return arch_text
def cobbler_setup(config):
hostip = "%s.1" % config['network']['ip_pre']
arch = get_profile_arch()
profile = "maas-precise-%s" % arch
cob = System(config, "zimmer")
cobbler_url = "http://%s/cobbler_api" % cob.ipaddr
print("Connecting to %s." % cobbler_url)
server = xmlrpclib.Server(cobbler_url)
token = server.login("cobbler","xcobbler")
systems = [Node(config, node) for node in NODES_RANGE]
for system in systems:
cobbler_addsystem(server, token, system, profile, hostip)
def main():
outpre = "libvirt-cobbler-"
cfg_file = "settings.cfg"
if len(sys.argv) == 1:
print(
"Usage: setup.py action\n"
"action one of: libvirt-setup, cobbler-setup")
sys.exit(1)
config = yaml_loadf(cfg_file)
if sys.argv[1] == "libvirt-setup":
libvirt_setup(config)
elif sys.argv[1] == "cobbler-setup":
cobbler_setup(config)
if __name__ == '__main__':
main()
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