mirror of
https://github.com/freeipa/ansible-freeipa.git
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6b5acd9b0c
A temporary krb5 configuration was used to join the domain in ipaclient_join. After that the final krkb5 configuration was created with enabled DNS discovery and used for the remainaing tasks, where also a connection to the IPA API was done. With several servers the DNS discovery could have picked up a different server. If the client deployment was faster than the replication this could have lead to an unknown host error. The issue was seen in performance testing where many simultaneous client enrollments have been done.. The goal is to keep server affinity as long as possible within the deployment process: The temporary krb5.conf that was used before in ipaclient_join was pulled out into an own module. The generated temporary krb5.conf is now used in ipaclient_join and also ipaclient_api. The generation of the final krb5.conf is moved to the end of the deployment process. Same as: https://pagure.io/freeipa/issue/9228 The setup of certmonger has been pulled out of ipaclient_setup_nss and moved to the end of the process after generating the final krb5.conf as it will use t will only use /etc/krb5.conf. Certificate issuance may fail during deployment due to using the final krb5.conf, but certmonger will re-try the request in this case. Same as: https://pagure.io/freeipa/issue/9246
263 lines
7.7 KiB
Python
263 lines
7.7 KiB
Python
# -*- coding: utf-8 -*-
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# Authors:
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# Thomas Woerner <twoerner@redhat.com>
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#
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# Based on ipa-client-install code
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#
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# Copyright (C) 2017-2022 Red Hat
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# see file 'COPYING' for use and warranty information
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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ANSIBLE_METADATA = {
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'metadata_version': '1.0',
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'supported_by': 'community',
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'status': ['preview'],
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}
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DOCUMENTATION = '''
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---
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module: ipaclient_test_keytab
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short_description:
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Test if the krb5.keytab on the machine is valid and can be used.
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description:
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Test if the krb5.keytab on the machine is valid and can be used.
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A temporary krb5.conf file will be generated to not fail on an invalid one.
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options:
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servers:
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description: Fully qualified name of IPA servers to enroll to
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type: list
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elements: str
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required: yes
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domain:
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description: Primary DNS domain of the IPA deployment
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type: str
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required: yes
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realm:
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description: Kerberos realm name of the IPA deployment
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type: str
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required: yes
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hostname:
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description: Fully qualified name of this host
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type: str
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required: yes
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kdc:
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description: The name or address of the host running the KDC
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type: str
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required: yes
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kinit_attempts:
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description: Repeat the request for host Kerberos ticket X times
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type: int
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default: 5
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author:
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- Thomas Woerner (@t-woerner)
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'''
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EXAMPLES = '''
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# Test IPA with local keytab
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- name: Test IPA in force mode with maximum 5 kinit attempts
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ipaclient_test_keytab:
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servers: ["server1.example.com","server2.example.com"]
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domain: example.com
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realm: EXAMPLE.COM
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kdc: server1.example.com
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hostname: client1.example.com
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kinit_attempts: 5
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# Test IPA with ipadiscovery return values
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- name: Join IPA
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ipaclient_test_keytab:
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servers: "{{ ipadiscovery.servers }}"
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domain: "{{ ipadiscovery.domain }}"
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realm: "{{ ipadiscovery.realm }}"
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kdc: "{{ ipadiscovery.kdc }}"
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hostname: "{{ ipadiscovery.hostname }}"
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'''
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RETURN = '''
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krb5_keytab_ok:
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description: The flag describes if krb5.keytab on the host is usable.
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returned: always
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type: bool
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ca_crt_exists:
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description: The flag describes if ca.crt exists.
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returned: always
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type: str
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krb5_conf_ok:
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description: The flag describes if krb5.conf on the host is usable.
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returned: always
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type: bool
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ping_test_ok:
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description: The flag describes if ipa ping test succeded.
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returned: always
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type: bool
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'''
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import os
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import tempfile
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from ansible.module_utils.basic import AnsibleModule
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from ansible.module_utils.ansible_ipa_client import (
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setup_logging, check_imports,
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SECURE_PATH, paths, kinit_keytab, run, GSSError, configure_krb5_conf
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)
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def main():
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module = AnsibleModule(
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argument_spec=dict(
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servers=dict(required=True, type='list', elements='str'),
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domain=dict(required=True, type='str'),
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realm=dict(required=True, type='str'),
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hostname=dict(required=True, type='str'),
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kdc=dict(required=True, type='str'),
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kinit_attempts=dict(required=False, type='int', default=5),
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),
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supports_check_mode=False,
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)
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module._ansible_debug = True
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check_imports(module)
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setup_logging()
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servers = module.params.get('servers')
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domain = module.params.get('domain')
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realm = module.params.get('realm')
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hostname = module.params.get('hostname')
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kdc = module.params.get('kdc')
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kinit_attempts = module.params.get('kinit_attempts')
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client_domain = hostname[hostname.find(".") + 1:]
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host_principal = 'host/%s@%s' % (hostname, realm)
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sssd = True
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# Remove IPA_DNS_CCACHE remain if it exists
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try:
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os.remove(paths.IPA_DNS_CCACHE)
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except OSError:
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pass
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krb5_keytab_ok = False
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krb5_conf_ok = False
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ping_test_ok = False
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ca_crt_exists = os.path.exists(paths.IPA_CA_CRT)
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env = {'PATH': SECURE_PATH, 'KRB5CCNAME': paths.IPA_DNS_CCACHE}
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# First try: Validate with temporary test krb5.conf that forces
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# 1) no DNS lookups and
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# 2) to load /etc/krb5.conf:
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#
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# [libdefaults]
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# dns_lookup_realm = false
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# dns_lookup_kdc = false
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# include /etc/krb5.conf
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#
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try:
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(krb_fd, krb_name) = tempfile.mkstemp()
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os.close(krb_fd)
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content = "\n".join([
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"[libdefaults]",
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"dns_lookup_realm = false",
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"dns_lookup_kdc = false",
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"include /etc/krb5.conf"
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])
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with open(krb_name, "w") as outf:
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outf.write(content)
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kinit_keytab(host_principal, paths.KRB5_KEYTAB,
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paths.IPA_DNS_CCACHE,
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config=krb_name,
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attempts=kinit_attempts)
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krb5_keytab_ok = True
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krb5_conf_ok = True
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# Test IPA
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try:
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result = run(["/usr/bin/ipa", "ping"], raiseonerr=False, env=env)
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if result.returncode == 0:
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ping_test_ok = True
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except OSError:
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pass
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except GSSError:
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pass
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finally:
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try:
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os.remove(krb_name)
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except OSError:
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module.fail_json(msg="Could not remove %s" % krb_name)
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# Second try: Validate krb5 keytab with temporary krb5
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# configuration
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if not krb5_conf_ok:
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try:
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(krb_fd, krb_name) = tempfile.mkstemp()
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os.close(krb_fd)
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configure_krb5_conf(
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cli_realm=realm,
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cli_domain=domain,
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cli_server=servers,
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cli_kdc=kdc,
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dnsok=False,
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filename=krb_name,
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client_domain=client_domain,
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client_hostname=hostname,
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configure_sssd=sssd,
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force=False)
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try:
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kinit_keytab(host_principal, paths.KRB5_KEYTAB,
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paths.IPA_DNS_CCACHE,
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config=krb_name,
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attempts=kinit_attempts)
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krb5_keytab_ok = True
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# Test IPA
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env['KRB5_CONFIG'] = krb_name
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try:
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result = run(["/usr/bin/ipa", "ping"], raiseonerr=False,
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env=env)
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if result.returncode == 0:
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ping_test_ok = True
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except OSError:
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pass
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except GSSError:
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pass
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finally:
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try:
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os.remove(krb_name)
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except OSError:
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module.fail_json(msg="Could not remove %s" % krb_name)
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if os.path.exists(krb_name + ".ipabkp"):
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try:
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os.remove(krb_name + ".ipabkp")
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except OSError:
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module.fail_json(
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msg="Could not remove %s.ipabkp" % krb_name)
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module.exit_json(changed=False,
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krb5_keytab_ok=krb5_keytab_ok,
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krb5_conf_ok=krb5_conf_ok,
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ca_crt_exists=ca_crt_exists,
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ping_test_ok=ping_test_ok)
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if __name__ == '__main__':
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main()
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