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"""
Copyright 2007, Red Hat, Inc
see AUTHORS
This software may be freely redistributed under the terms of the GNU
general public license.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
"""
import os
import socket
import string
import sys
import time
import traceback
import xmlrpclib
import glob
import traceback
import codes
from func import certs
from func.config import read_config
from func.commonconfig import FuncdConfig
from func import logger
# "localhost" is a lame hostname to use for a key, so try to get
# a more meaningful hostname. We do this by connecting to the certmaster
# and seeing what interface/ip it uses to make that connection, and looking
# up the hostname for that.
def get_hostname():
# FIXME: this code ignores http proxies (which granted, we don't
# support elsewhere either. It also hardcodes the port number
# for the certmaster for now
hostname = None
hostname = socket.gethostname()
try:
ip = socket.gethostbyname(hostname)
except:
return hostname
if ip != "127.0.0.1":
return hostname
config_file = '/etc/func/minion.conf'
config = read_config(config_file, FuncdConfig)
server = config.certmaster
port = 51235
try:
s = socket.socket()
s.settimeout(5)
s.connect((server, port))
(intf, port) = s.getsockname()
hostname = socket.gethostbyaddr(intf)[0]
s.close()
except:
s.close()
raise
return hostname
def create_minion_keys():
config_file = '/etc/func/minion.conf'
config = read_config(config_file, FuncdConfig)
cert_dir = config.cert_dir
master_uri = 'http://%s:51235/' % config.certmaster
hn = get_hostname()
if hn is None:
raise codes.FuncException("Could not determine a hostname other than localhost")
key_file = '%s/%s.pem' % (cert_dir, hn)
csr_file = '%s/%s.csr' % (cert_dir, hn)
cert_file = '%s/%s.cert' % (cert_dir, hn)
ca_cert_file = '%s/ca.cert' % cert_dir
if os.path.exists(cert_file) and os.path.exists(ca_cert_file):
return
keypair = None
try:
if not os.path.exists(cert_dir):
os.makedirs(cert_dir)
if not os.path.exists(key_file):
keypair = certs.make_keypair(dest=key_file)
if not os.path.exists(csr_file):
if not keypair:
keypair = certs.retrieve_key_from_file(key_file)
csr = certs.make_csr(keypair, dest=csr_file)
except Exception, e:
traceback.print_exc()
raise codes.FuncException, "Could not create local keypair or csr for minion funcd session"
result = False
log = logger.Logger().logger
while not result:
try:
log.debug("submitting CSR to certmaster %s" % master_uri)
result, cert_string, ca_cert_string = submit_csr_to_master(csr_file, master_uri)
except socket.gaierror, e:
raise codes.FuncException, "Could not locate certmaster at %s" % master_uri
# logging here would be nice
if not result:
log.warning("no response from certmaster %s, sleeping 10 seconds" % master_uri)
time.sleep(10)
if result:
log.debug("received certificate from certmaster %s, storing" % master_uri)
cert_fd = os.open(cert_file, os.O_RDWR|os.O_CREAT, 0644)
os.write(cert_fd, cert_string)
os.close(cert_fd)
ca_cert_fd = os.open(ca_cert_file, os.O_RDWR|os.O_CREAT, 0644)
os.write(ca_cert_fd, ca_cert_string)
os.close(ca_cert_fd)
def submit_csr_to_master(csr_file, master_uri):
""""
gets us our cert back from the certmaster.wait_for_cert() method
takes csr_file as path location and master_uri
returns Bool, str(cert), str(ca_cert)
"""
fo = open(csr_file)
csr = fo.read()
s = xmlrpclib.ServerProxy(master_uri)
return s.wait_for_cert(csr)
# this is kind of handy, so keep it around for now
# but we really need to fix out server side logging and error
# reporting so we don't need it
def trace_me():
x = traceback.extract_stack()
bar = string.join(traceback.format_list(x))
return bar
def daemonize(pidfile=None):
"""
Daemonize this process with the UNIX double-fork trick.
Writes the new PID to the provided file name if not None.
"""
print pidfile
pid = os.fork()
if pid > 0:
sys.exit(0)
os.setsid()
os.umask(0)
pid = os.fork()
if pid > 0:
if pidfile is not None:
open(pidfile, "w").write(str(pid))
sys.exit(0)
def get_acls_from_config(acldir='/etc/func/minion-acl.d'):
"""
takes a dir of .acl files
returns a dict of hostname+hash = [methods, to, run]
"""
acls = {}
if not os.path.exists(acldir):
print 'acl dir does not exist: %s' % acldir
return acls
# get the set of files
acl_glob = '%s/*.acl' % acldir
files = glob.glob(acl_glob)
for acl_file in files:
try:
fo = open(acl_file, 'r')
except (IOError, OSError), e:
print 'cannot open acl config file: %s - %s' % (acl_file, e)
continue
for line in fo.readlines():
if line.startswith('#'): continue
if line.strip() == '': continue
line = line.replace('\n', '')
(host, methods) = line.split('=')
host = host.strip().lower()
methods = methods.strip()
methods = methods.replace(',',' ')
methods = methods.split()
if not acls.has_key(host):
acls[host] = []
acls[host].extend(methods)
return acls
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