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|
'''BB Plugin'''
import Bcfg2.Server.Plugin
import lxml.etree
import os, fcntl
from socket import gethostbyname
from Bcfg2.Server.Plugins.Metadata import MetadataConsistencyError
# 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 = ".mcs.anl.gov" # 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 viz(self, hosts, bundles, key, colors):
'''admin mode viz support'''
groups_tree = lxml.etree.parse(self.data + "/groups.xml")
groups = groups_tree.getroot()
categories = {'default':'grey83'}
instances = {}
viz_str = ""
egroups = groups.findall("Group") + groups.findall('.//Groups/Group')
for group in egroups:
if not group.get('category') in categories:
categories[group.get('category')] = colors.pop()
group.set('color', categories[group.get('category')])
if None in categories:
del categories[None]
if hosts:
clients = self.clients
for client, profile in clients.iteritems():
if profile in instances:
instances[profile].append(client)
else:
instances[profile] = [client]
for profile, clist in instances.iteritems():
clist.sort()
viz_str += '''\t"%s-instances" [ label="%s", shape="record" ];\n''' \
% (profile, '|'.join(clist))
viz_str += '''\t"%s-instances" -> "group-%s";\n''' \
% (profile, profile)
if bundles:
bundles = []
[bundles.append(bund.get('name')) \
for bund in groups.findall('.//Bundle') \
if bund.get('name') not in bundles]
bundles.sort()
for bundle in bundles:
viz_str += '''\t"bundle-%s" [ label="%s", shape="septagon"];\n''' \
% (bundle, bundle)
gseen = []
for group in egroups:
if group.get('profile', 'false') == 'true':
style = "filled, bold"
else:
style = "filled"
gseen.append(group.get('name'))
viz_str += '\t"group-%s" [label="%s", style="%s", fillcolor=%s];\n' % \
(group.get('name'), group.get('name'), style, group.get('color'))
if bundles:
for bundle in group.findall('Bundle'):
viz_str += '\t"group-%s" -> "bundle-%s";\n' % \
(group.get('name'), bundle.get('name'))
gfmt = '\t"group-%s" [label="%s", style="filled", fillcolor="grey83"];\n'
for group in egroups:
for parent in group.findall('Group'):
if parent.get('name') not in gseen:
viz_str += gfmt % (parent.get('name'), parent.get('name'))
gseen.append(parent.get("name"))
viz_str += '\t"group-%s" -> "group-%s" ;\n' % \
(group.get('name'), parent.get('name'))
if key:
for category in categories:
viz_str += '''\t"''' + category + '''" [label="''' + category + \
'''", shape="record", style="filled", fillcolor=''' + \
categories[category] + '''];\n'''
return viz_str
def remove_client(self, client_name):
'''Remove client from bb.xml'''
bb_tree = lxml.etree.parse(self.data + "/bb.xml")
root = bb_tree.getroot()
if DOMAIN_SUFFIX in client_name:
client_name = client_name.split('.')[0]
if len(root.xpath(".//Node[@name='%s']" % client_name)) != 1:
self.logger.error("Client \"%s\" does not exist" % client_name)
raise MetadataConsistencyError
else:
root.remove(root.xpath(".//Node[@name='%s']" % client_name)[0])
self.write_metadata(bb_tree)
def add_client(self, client_name, attribs):
'''Add a client to bb.xml'''
bb_tree = lxml.etree.parse(self.data + "/bb.xml")
root = bb_tree.getroot()
if DOMAIN_SUFFIX in client_name:
client_name = client_name.split('.')[0]
if len(root.xpath(".//Node[@name='%s']" % client_name)) != 0:
self.logger.error("Client \"%s\" already exists" % client_name)
raise MetadataConsistencyError
else:
element = lxml.etree.Element("Client", name=client_name)
for key, val in attribs.iteritems():
element.set(key, val)
root.append(element)
self.write_metadata(bb_tree)
def write_metadata(self, tree):
'''write metadata back to bb.xml'''
data_file = open(self.data + "/bb.xml","w")
fd = data_file.fileno()
while True:
try:
fcntl.lockf(fd, fcntl.LOCK_EX | fcntl.LOCK_NB)
except IOError:
continue
else:
break
tree.write(data_file)
fcntl.lockf(fd, fcntl.LOCK_UN)
data_file.close()
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 'mac' in data and 'ip' in data:
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 'mac' in data and 'ip' in data:
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 ("%s.key" % user) in rdata])
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 'user' in host_dict:
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
self.write_metadata(bb_tree)
return bundles
def HandleEvent(self, event=None):
'''Handle events'''
Bcfg2.Server.Plugin.DirectoryBacked.HandleEvent(self, event)
# static.dhcpd.conf hack
if 'static.dhcpd.conf' in self.entries:
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 'ip' in iface.attrib:
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 "login" in host:
profile = PROFILE_MAP["bblogin"]
else:
profile = "basic"
self.clients[full_hostname] = profile
# get ip address from bb.mxl, if available
if 'ip' in node_dict:
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:
if not 'mac' in node_dict:
self.logger.error("no mac address for %s" % host)
continue
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
|
