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library/ipatest.py: New ipa test module

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Test if the krb5.keytab on the machine is valid and can be used.

options:
  servers:
    description: The FQDN of the IPA servers to connect to.
    required: true
  domain:
    description: The primary DNS domain of an existing IPA deployment.
    required: true
  realm:
    description: The Kerberos realm of an existing IPA deployment.
    required: true
  hostname:
    description: The hostname of the machine to join (FQDN).
    required: true
  kdc:
    description: The name or address of the host running the KDC.
    required: true
  principal:
    description: The authorized kerberos principal used to join the IPA realm.
    required: false
  kinit_attempts:
    description: Repeat the request for host Kerberos ticket X times.
    required: false
    default: 5

returns:
  krb5_keytab_ok:
    description: The flag describes if krb5.keytab on the host is usable.
    returned: always
    type: bool
This commit is contained in:
Thomas Woerner
2017-09-18 17:29:24 +02:00
parent 8daef41e0a
commit bf64c0bb8f
1 changed files with 225 additions and 0 deletions
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#!/usr/bin/python
# -*- coding: utf-8 -*-
# Authors:
# Thomas Woerner <twoerner@redhat.com>
#
# Based on ipa-client-install code
#
# Copyright (C) 2017 Red Hat
# see file 'COPYING' for use and warranty information
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
ANSIBLE_METADATA = {
'metadata_version': '1.0',
'supported_by': 'community',
'status': ['preview'],
}
DOCUMENTATION = '''
---
module: ipatest
short description: Test if the krb5.keytab on the machine is valid and can be used.
description:
Test if the krb5.keytab on the machine is valid and can be used.
A temporary krb5.conf file will be generated to not fail on an invalid one.
options:
servers:
description: The FQDN of the IPA servers to connect to.
required: true
domain:
description: The primary DNS domain of an existing IPA deployment.
required: true
realm:
description: The Kerberos realm of an existing IPA deployment.
required: true
hostname:
description: The hostname of the machine to join (FQDN).
required: true
kdc:
description: The name or address of the host running the KDC.
required: true
principal:
description: The authorized kerberos principal used to join the IPA realm.
required: false
kinit_attempts:
description: Repeat the request for host Kerberos ticket X times.
required: false
default: 5
author:
- Thomas Woerner
'''
EXAMPLES = '''
# Join IPA to get the keytab
- name: Test IPA in force mode with maximum 5 kinit attempts
ipatest:
servers: ["server1.example.com","server2.example.com"]
domain: example.com
realm: EXAMPLE.COM
kdc: server1.example.com
hostname: client1.example.com
principal: admin
kinit_attempts: 5
# Join IPA to get the keytab using ipadiscovery return values
- name: Join IPA
ipajoin:
servers: "{{ ipadiscovery.servers }}"
domain: "{{ ipadiscovery.domain }}"
realm: "{{ ipadiscovery.realm }}"
kdc: "{{ ipadiscovery.kdc }}"
hostname: "{{ ipadiscovery.hostname }}"
principal: admin
'''
RETURN = '''
krb5_keytab_ok:
description: The flag describes if krb5.keytab on the host is usable.
returned: always
type: bool
'''
class Object(object):
pass
options = Object()
import os
import sys
import gssapi
import tempfile
import inspect
from ansible.module_utils.basic import AnsibleModule
from ipapython.version import NUM_VERSION, VERSION
if NUM_VERSION < 40400:
raise Exception, "freeipa version '%s' is too old" % VERSION
from ipaplatform.paths import paths
try:
from ipalib.install.kinit import kinit_keytab
except ImportError:
from ipapython.ipautil import kinit_keytab
try:
from ipaclient.install.client import configure_krb5_conf
except ImportError:
# Create temporary copy of ipa-client-install script (as
# ipa_client_install.py) to be able to import the script easily and also
# to remove the global finally clause in which the generated ccache file
# gets removed. The ccache file will be needed in the next step.
# This is done in a temporary directory that gets removed right after
# ipa_client_install has been imported.
import shutil
temp_dir = tempfile.mkdtemp(dir="/tmp")
sys.path.append(temp_dir)
temp_file = "%s/ipa_client_install.py" % temp_dir
with open("/usr/sbin/ipa-client-install", "r") as f_in:
with open(temp_file, "w") as f_out:
for line in f_in:
if line.startswith("finally:"):
break
f_out.write(line)
import ipa_client_install
shutil.rmtree(temp_dir, ignore_errors=True)
sys.path.remove(temp_dir)
argspec = inspect.getargspec(ipa_client_install.configure_krb5_conf)
if argspec.keywords is None:
def configure_krb5_conf(
cli_realm, cli_domain, cli_server, cli_kdc, dnsok,
filename, client_domain, client_hostname, force,
configure_sssd):
global options
options.force = force
options.sssd = configure_sssd
return ipa_client_install.configure_krb5_conf(
cli_realm, cli_domain, cli_server, cli_kdc, dnsok, options,
filename, client_domain, client_hostname)
else:
configure_krb5_conf = ipa_client_install.configure_krb5_conf
from ipapython.ipautil import realm_to_suffix, run
import logging
logger = logging.getLogger("ipa-client-install")
def main():
module = AnsibleModule(
argument_spec = dict(
servers=dict(required=True, type='list'),
domain=dict(required=True),
realm=dict(required=True),
hostname=dict(required=True),
kdc=dict(required=True),
principal=dict(required=False),
kinit_attempts=dict(required=False, type='int', default=5),
),
supports_check_mode = True,
)
module._ansible_debug = True
servers = module.params.get('servers')
domain = module.params.get('domain')
realm = module.params.get('realm')
hostname = module.params.get('hostname')
kdc = module.params.get('kdc')
principal = module.params.get('principal')
kinit_attempts = module.params.get('kinit_attempts')
client_domain = hostname[hostname.find(".")+1:]
host_principal = 'host/%s@%s' % (hostname, realm)
sssd = True
krb5_keytab_ok = True
try:
(krb_fd, krb_name) = tempfile.mkstemp()
os.close(krb_fd)
configure_krb5_conf(
cli_realm=realm,
cli_domain=domain,
cli_server=servers,
cli_kdc=kdc,
dnsok=False,
filename=krb_name,
client_domain=client_domain,
client_hostname=hostname,
configure_sssd=sssd,
force=False)
# Obtain the TGT. We do it with the temporary krb5.conf, so that
# only the KDC we're installing under is contacted.
# Other KDCs might not have replicated the principal yet.
# Once we have the TGT, it's usable on any server.
try:
kinit_keytab(host_principal, paths.KRB5_KEYTAB,
paths.IPA_DNS_CCACHE,
config=krb_name,
attempts=kinit_attempts)
except gssapi.exceptions.GSSError as e:
# failure to get ticket makes it impossible to login and bind
# from sssd to LDAP, abort installation and rollback changes
krb5_keytab_ok = False
finally:
try:
os.remove(krb_name)
except OSError:
module.fail_json(msg="Could not remove %s" % krb_name)
module.exit_json(changed=False, krb5_keytab_ok=krb5_keytab_ok)
if __name__ == '__main__':
main()