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'''BB Plugin'''
import Bcfg2.Server.Plugin
import lxml.etree
import sys, os
from socket import gethostbyname
# map of keywords to profiles
# probably need a better way to do this
PROFILE_MAP = {"ubuntu-i386":"compute-node",
"ubuntu-amd64":"compute-node-amd64",
"fc6":"fc6-compute-node",
"peta":"pvfs-server",
"bbsto":"fileserver",
"bblogin":"head-node"}
DOMAIN_SUFFIX = "" # default is .mcs.anl.gov
PXE_CONFIG = "pxelinux.0" # default is pxelinux.0
class BB(Bcfg2.Server.Plugin.GeneratorPlugin,
Bcfg2.Server.Plugin.StructurePlugin,
Bcfg2.Server.Plugins.Metadata.Metadata,
Bcfg2.Server.Plugin.DirectoryBacked):
'''BB Plugin handles bb node configuration'''
__name__ = 'BB'
experimental = True
write_to_disk = True
def __init__(self, core, datastore):
Bcfg2.Server.Plugin.GeneratorPlugin.__init__(self, core, datastore)
try:
Bcfg2.Server.Plugin.DirectoryBacked.__init__(self, self.data, self.core.fam)
except OSError, ioerr:
self.logger.error("Failed to load BB repository from %s" % (self.data))
self.logger.error(ioerr)
raise Bcfg2.Server.Plugin.PluginInitError
Bcfg2.Server.Plugins.Metadata.Metadata.__init__(self, core, datastore, False)
self.Entries = {'ConfigFile':{'/etc/security/limits.conf':self.gen_limits,
'/root/.ssh/authorized_keys':self.gen_root_keys,
'/etc/sudoers':self.gen_sudoers,
'/etc/dhcp3/dhcpd.conf':self.gen_dhcpd}}
self.nodes = {}
self.dhcpd_loaded = False
self.need_update = False
def gen_dhcpd(self, entry, metadata):
'''Generate dhcpd.conf to serve to dhcp server'''
entry.text = self.entries["static.dhcpd.conf"].data
for host, data in self.nodes.iteritems():
entry.text += "host %s {\n" % (host + DOMAIN_SUFFIX)
if data.has_key('mac') and data.has_key('ip'):
entry.text += " hardware ethernet %s;\n" % (data['mac'])
entry.text += " fixed-address %s;\n" % (data['ip'])
entry.text += " filename \"%s\";\n}\n" % (PXE_CONFIG)
else:
self.logger.error("incomplete client data")
perms = {'owner':'root', 'group':'root', 'perms':'0600'}
[entry.attrib.__setitem__(key, value) for (key, value)
in perms.iteritems()]
def update_dhcpd(self):
'''Upadte dhcpd.conf if bcfg2 server is also the bcfg2 server'''
entry = self.entries["static.dhcpd.conf"].data
for host, data in self.nodes.iteritems():
entry += "host %s {\n" % (host + DOMAIN_SUFFIX)
if data.has_key('mac') and data.has_key('ip'):
entry += " hardware ethernet %s;\n" % (data['mac'])
entry += " fixed-address %s;\n" % (data['ip'])
entry += " filename \"%s\";\n}\n" % (PXE_CONFIG)
else:
self.logger.error("incomplete client data")
dhcpd = open("/etc/dhcp3/dhcpd.conf",'w')
dhcpd.write(entry)
dhcpd.close()
def gen_root_keys(self, entry, metadata):
'''Build /root/.ssh/authorized_keys entry'''
users = self.get_users(metadata)
rdata = self.entries
entry.text = "".join([rdata["%s.key" % user].data for user
in users if rdata.has_key("%s.key" % user)])
perms = {'owner':'root', 'group':'root', 'perms':'0600'}
[entry.attrib.__setitem__(key, value) for (key, value)
in perms.iteritems()]
def gen_sudoers(self, entry, metadata):
'''Build /etc/sudoers entry'''
users = self.get_users(metadata)
entry.text = self.entries['static.sudoers'].data
entry.text += "".join(["%s ALL=(ALL) ALL\n" % user
for user in users])
perms = {'owner':'root', 'group':'root', 'perms':'0440'}
[entry.attrib.__setitem__(key, value) for (key, value)
in perms.iteritems()]
def gen_limits(self, entry, metadata):
'''Build /etc/security/limits.conf entry'''
users = self.get_users(metadata)
entry.text = self.entries["static.limits.conf"].data
perms = {'owner':'root', 'group':'root', 'perms':'0600'}
[entry.attrib.__setitem__(key, value) for (key, value) in perms.iteritems()]
entry.text += "".join(["%s hard maxlogins 1024\n" % uname for uname in users])
if "*" not in users:
entry.text += "* hard maxlogins 0\n"
def get_users(self, metadata):
'''Get users associated with a specific host'''
users = []
for host, host_dict in self.nodes.iteritems():
if host == metadata.hostname.split('.')[0]:
if host_dict.has_key('user'):
if host_dict['user'] != "none":
users.append(host_dict['user'])
return users
def BuildStructures(self, metadata):
'''Update build/boot state and create bundle for server'''
try:
host_attr = self.nodes[metadata.hostname.split('.')[0]]
except KeyError:
self.logger.error("failed to find metadata for host %s"
% metadata.hostname)
return []
bundles = []
# create symlink and dhcp bundle
bundle = lxml.etree.Element('Bundle', name='boot-server')
for host, data in self.nodes.iteritems():
link = lxml.etree.Element('BoundSymLink')
link.attrib['name'] = "01-%s" % (data['mac'].replace(':','-').lower())
link.attrib['to'] = data['action']
bundle.append(link)
dhcpd = lxml.etree.Element('BoundConfigFile', name='/etc/dhcp3/dhcpd.conf')
bundle.append(dhcpd)
bundles.append(bundle)
# toggle build/boot in bb.xml
if host_attr['action'].startswith("build"):
# make new action string
action = ""
if host_attr['action'] == "build":
action = "boot"
else:
action = host_attr['action'].replace("build", "boot", 1)
# write changes to file
bb_tree = lxml.etree.parse(self.entries["bb.xml"])
nodes = bb_tree.getroot().findall(".//Node")
for node in nodes:
if node.attrib['name'] == metadata.hostname.split('.')[0]:
node.attrib['action'] = action
break
bb_tree.write("%s/%s" % (self.data, 'bb.xml'))
return bundles
def HandleEvent(self, event=None):
'''Handle events'''
Bcfg2.Server.Plugin.DirectoryBacked.HandleEvent(self, event)
# static.dhcpd.conf hack
if self.entries.has_key('static.dhcpd.conf'):
self.dhcpd_loaded = True
if self.need_update and self.dhcpd_loaded:
self.update_dhcpd()
self.need_update = False
# send events to groups.xml back to Metadata plugin
if event and "groups.xml" == event.filename:
Bcfg2.Server.Plugins.Metadata.Metadata.HandleEvent(self, event)
# handle events to bb.xml
if event and "bb.xml" == event.filename:
bb_tree = lxml.etree.parse("%s/%s" % (self.data, event.filename))
root = bb_tree.getroot()
elements = root.findall(".//Node")
for node in elements:
host = node.attrib['name']
node_dict = node.attrib
if node.findall("Interface"):
iface = node.findall("Interface")[0]
node_dict['mac'] = iface.attrib['mac']
if iface.attrib.has_key('ip'):
node_dict['ip'] = iface.attrib['ip']
# populate self.clients dict
full_hostname = host + DOMAIN_SUFFIX
profile = ""
# need to translate image/action into profile name
if "ubuntu" in node_dict['action']:
if "amd64" in node_dict['action']:
profile = PROFILE_MAP["ubuntu-amd64"]
else:
profile = PROFILE_MAP["ubuntu-i386"]
elif "fc6" in node_dict['action']:
profile = PROFILE_MAP["fc6"]
elif "peta" in host:
profile = PROFILE_MAP["peta"]
elif "bbsto" in host:
profile = PROFILE_MAP["bbsto"]
elif "bblogin" in host:
profile = PROFILE_MAP["bblogin"]
else:
profile = "basic"
self.clients[full_hostname] = profile
# get ip address from bb.mxl, if available
if node_dict.has_key('ip'):
ip = node_dict['ip']
self.addresses[ip] = [host]
else:
try:
node_dict['ip'] = gethostbyname(full_hostname)
except:
self.logger.error("failed to resolve host %s" % full_hostname)
self.nodes[host] = node_dict
# update symlinks and /etc/dhcp3/dhcpd.conf
if self.write_to_disk:
mac = node_dict['mac'].replace(':','-').lower()
linkname = "/tftpboot/pxelinux.cfg/01-%s" % (mac)
try:
if os.readlink(linkname) != node_dict['action']:
os.unlink(linkname)
os.symlink(node_dict['action'], linkname)
except OSError:
self.logger.error("failed to find link for mac address %s" % mac)
if self.dhcpd_loaded:
self.update_dhcpd()
else:
self.need_update = True
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