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Thomas Woerner 397acc01db ipaclient: Make krb5 DNS lookup possible in cluster environments

krb5 DNS discovery was not possible in cluster environments as the server
list from groups.ipaserver was used all the time. DNS discovery is though
only used if no servers are given.

The new setting ipaclient_no_dns_lookup has been added to make sure that
DNS lookup is used in the first place and can be disabled easily with this
setting. There is also a new way to override servers per client in the
inventory file with ipaclient_servers.

Two new settings have been added:

ipaclient_no_dns_lookup (bool, default: no)
  Set to 'yes' to use groups.ipaserver in cluster environments as servers
  for the clients. This deactivates DNS lookup in krb5.

ipaclient_servers (list of strings, default: undefined)
  Manually override list of servers for example in a cluster environment on
  a per client basis. The list of servers is normally taken from from
  groups.ipaserver in cluster environments.

2018-05-18 15:06:53 +02:00

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ipaclient role

Description

This role allows to join hosts as clients to an IPA domain. This can be done in differnt ways using auto-discovery of the servers, domain and other settings or by specifying them.

Usage

Example inventory file with fixed principal using auto-discovery with DNS records:

[ipaclients]
ipaclient1.example.com
ipaclient2.example.com

[ipaclients:vars]
ipaadmin_principal=admin

Example playbook to setup the IPA client(s) using principal from inventory file and password from an Ansible Vault file:

- name: Playbook to configure IPA clients with username/password
  hosts: ipaclients
  become: true
  vars_files:
  - playbook_sensitive_data.yml

  roles:
  - role: ipaclient
    state: present

Example playbook to unconfigure the IPA client(s) using principal and password from inventory file:

- name: Playbook to unconfigure IPA clients
  hosts: ipaclients
  become: true

  roles:
  - role: ipaclient
    state: absent

Example inventory file with fixed servers, principal, password and domain:

[ipaclients]
ipaclient1.example.com
ipaclient2.example.com

[ipaservers]
ipaserver.example.com

[ipaclients:vars]
ipaclient_domain=example.com
ipaadmin_principal=admin
ipaadmin_password=MySecretPassword123

Example playbook to setup the IPA client(s) using principal and password from inventory file:

- name: Playbook to configure IPA clients with username/password
  hosts: ipaclients
  become: true

  roles:
  - role: ipaclient
    state: present

Variables

ipaservers - Group of IPA server hostnames. (list of strings, optional)

ipaclients - Group of IPA client hostnames. (list of strings)

ipaadmin_keytab - The path to the admin keytab used for alternative authentication. (string, optional)

ipaadmin_principal - The authorized kerberos principal used to join the IPA realm. (string, optional)

ipaadmin_password - The password for the kerberos principal. (string, optional)

ipaclient_domain - The primary DNS domain of an existing IPA deployment. (string, optional)

ipaclient_realm - The Kerberos realm of an existing IPA deployment. (string, optional)

ipaclient_keytab - The path to a backed-up host keytab from previous enrollment. (string, optional)

ipaclient_force_join - Set force_join to yes to join the host even if it is already enrolled. (bool, optional)

ipaclient_use_otp - Enforce the generation of a one time password to configure new and existing hosts. The enforcement on an existing host is not done if there is a working krb5.keytab on the host. If the generation of an otp is enforced for an existing host entry, then the host gets diabled and the containing keytab gets removed. (bool, optional)

ipaclient_allow_repair - Allow repair of already joined hosts. Contrary to ipaclient_force_join the host entry will not be changed on the server. (bool, optional)

ipaclient_kinit_attempts - Repeat the request for host Kerberos ticket X times if it fails. (int, optional)

ipaclient_ntp - Set to no to not configure and enable NTP (bool, optional)

ipaclient_mkhomedir - Set to yes to configure PAM to create a users home directory if it does not exist. (string, optional)

Cluster Specific Variables

ipaclient_no_dns_lookup - Set to 'yes' to use groups.ipaserver in cluster environments as servers for the clients. This deactivates DNS lookup in krb5. (bool, optional, default: 'no')

ipaclient_servers - Manually override list of servers for example in a cluster environment on a per client basis. The list of servers is normally taken from from groups.ipaserver in cluster environments. (list of strings, optional)

Requirements

freeipa-client v4.4 or later

Authors

Florence Blanc-Renaud

Thomas Woerner

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