ipahost: Extension to be able handle several hosts and all settings

ipa[server,replica,client]: Add support for CentOS-8

ansible_freeipa_module: Better support for KRB5CCNAME environment variable

The ipahost management module was not able to add several hosts at once.
Addtionally there have been settings missing.

ansible_freeipa_module has been extended to provide two additional functions
that are needed to simplify the extension of the ipahost module:

    gen_add_del_lists(user_list, res_list)
    encode_certificate(cert)

gen_add_del_lists will generate the lists for the addition and removal of
members using the provided user and ipa settings.

encode_certificate will encode a certificate using base64 with also taking
FreeIPA and Python versions into account.

The missing settings in ipahost have been:

    certificate
    managedby_host
    principal
    create_keytab_[user,group,host,hostgroup]
    retrieve_keytab_[user,group,host,hostgroup]
    sshpubkey
    userclass
    auth_ind
    requires_pre_auth
    ok_as_delegate
    ok_to_auth_as_delegate

The README-host.md file has been updated to provide information about the
new settings and also the members. Also examples for the new things have
been added.

New example playbooks have been added:

    playbooks/host/add-host.yml
    playbooks/host/host-member-allow_create_keytab-absent.yml
    playbooks/host/host-member-allow_create_keytab-present.yml
    playbooks/host/host-member-allow_retrieve_keytab-absent.yml
    playbooks/host/host-member-allow_retrieve_keytab-present.yml
    playbooks/host/host-member-certificate-absent.yml
    playbooks/host/host-member-certificate-present.yml
    playbooks/host/host-member-managedby_host-absent.yml
    playbooks/host/host-member-managedby_host-present.yml
    playbooks/host/host-member-principal-absent.yml
    playbooks/host/host-member-principal-present.yml
    playbooks/host/host-present-with-allow_create_keytab.yml
    playbooks/host/host-present-with-allow_retrieve_keytab.yml
    playbooks/host/host-present-with-certificate.yml
    playbooks/host/host-present-with-managedby_host.yml
    playbooks/host/host-present-with-principal.yml
    playbooks/host/host-present-with-randompassword.yml
    playbooks/host/host-present.yml
    playbooks/host/hosts-member-certificate-absent.yml
    playbooks/host/hosts-member-certificate-present.yml
    playbooks/host/hosts-member-managedby_host-absent.yml
    playbooks/host/hosts-member-managedby_host-present.yml
    playbooks/host/hosts-member-principal-absent.yml
    playbooks/host/hosts-member-principal-present.yml
    playbooks/host/hosts-present-with-certificate.yml
    playbooks/host/hosts-present-with-managedby_host.yml
    playbooks/host/hosts-present-with-randompasswords.yml

New tests have been added for the module:

    tests/host/certificate/cert1.der
    tests/host/certificate/cert1.pem
    tests/host/certificate/cert2.der
    tests/host/certificate/cert2.pem
    tests/host/certificate/cert3.der
    tests/host/certificate/cert3.pem
    tests/host/certificate/private1.key
    tests/host/certificate/private2.key
    tests/host/certificate/private3.key
    tests/host/certificate/test_host_certificate.yml
    tests/host/certificate/test_hosts_certificate.yml
    tests/host/test_host.yml
    tests/host/test_host_allow_create_keytab.yml
    tests/host/test_host_allow_retrieve_keytab.yml
    tests/host/test_host_managedby_host.yml
    tests/host/test_host_principal.yml
    tests/host/test_host_random.yml
    tests/host/test_hosts.yml
    tests/host/test_hosts_managedby_host.yml
    tests/host/test_hosts_principal.yml

The files for RHEL-8 (RedHat-8.yml) have simply been linked to CentOS-8.yml
for the ipaserver, ipareplica and ipaclient roles.

Fixes issue #121 (roles/*/vars needs CentOS-8.yml files)

The use of gssapi.creds.Credentials is not good if krb5 ticket forwarding
is used. It will fail. gssapi.Credentials with usage and store is the proper
way to do this.

Added context configuration to api_connect.

This patch allows the connection to the ipa api to use a context different
than 'server', if needed.

ipaclient: Fix misspelled sssd options

ipauser, ipahost: Return random password

The random password is only returned if random is yes and the host did
not exist or update_password is yes.

If only one host is handled by the module, the returned dict is containing
this dict:

  { "randompassword": "<the host random password>" }

If several hosts are handled by the module (future feature):

  { "<host>": { "randompassword": "<the host random password>" } }

Fixes issue #134 (ipahost does not return the random password)

The random password is only returned if random is yes and user did not exist
or update_password is yes.

If only one user is handled by the module, the returned dict is containing
this dict:

  { "randompassword": "<the user random password>" }

If several users are handled by the module:

  { "<user>": { "randompassword": "<the user random password>" } }

This is related to issue #134 (ipahost does not return the random password)

The sssd options in the ipaclient role missed a 's' in the role. The readme
of the role used the proper names with 3 's'. The names in the role have
been fixed and if the old setting are used, they will be used in the first
place.

Also utils/ansible-ipa-client-install has been adaped to use the proper
option names now.

This fixes issue #145 (The ipaclient role misspells sssd)

Add missing information about action variable.

Fix "Example playbook to delete a user is absent, but preserved"

Support 'sn' alias of 'last' for surname

Update description, drop empty dependencies.
Fixes #146 (ansible-freeipa collection not installable by 2.9 ansible-galaxy collection install)

Add command and information about ansible-galaxy collection install. Installing collections
using the ansible-galaxy command is only supported with ansible 2.9+. The mazer tool can
be used for to install the collection for ansible 2.8:

ipahostgroup: Fix changed flag, support IPA 4.6 on RHEL-7, new test cases

New sudorule (Sudo Rule) management module

There is a new sudorule (Sudo Rule) management module placed in the plugins
folder:

  plugins/modules/ipasudorule.py

The sudorule module allows to ensure presence and absence of Sudo Rules.

Here is the documentation for the module:

  README-sudorule.md

New example playbooks have been added:

    playbooks/sudorule/ensure-sudorule-host-member-is-absent.yml
    playbooks/sudorule/ensure-sudorule-host-member-is-present.yml
    playbooks/sudorule/ensure-sudorule-hostgroup-member-is-absent.yml
    playbooks/sudorule/ensure-sudorule-hostgroup-member-is-present.yml
    playbooks/sudorule/ensure-sudorule-is-absent.yml
    playbooks/sudorule/ensure-sudorule-is-disabled.yml
    playbooks/sudorule/ensure-sudorule-is-enabled.yml
    playbooks/sudorule/ensure-sudorule-is-present.yml
    playbooks/sudorule/ensure-sudorule-sudocmd-is-absent.yml
    playbooks/sudorule/ensure-sudorule-sudocmd-is-present.yml

New tests added for the module:

  tests/hbacrule/test_sudorule.yml

Added support for predefining client OTP using ipaclient_otp

The changed flag returned by ipahostgroup calls have not always been correct.
The use of the module with IPA version 4.6 on RHEL-7 resulted in encoding
errors. All this has been fixed.

Addtitionally new test cases have been added to make sure that the issues
are solved.

New hbacrule (HBAC Rule) management module

There is a new hbacrule (HBAC Rule) management module placed in the plugins
folder:

  plugins/modules/ipahbacrule.py

The hbacrule module allows to ensure presence and absence of HBAC Rules.

Here is the documentation for the module:

  README-hbacrule.md

New example playbooks have been added:

  playbooks/hbacrule/ensure-hbarule-allhosts-absent.yml
  playbooks/hbacrule/ensure-hbarule-allhosts-disabled.yml
  playbooks/hbacrule/ensure-hbarule-allhosts-enabled.yml
  playbooks/hbacrule/ensure-hbarule-allhosts-present.yml
  playbooks/hbacrule/ensure-hbarule-allhosts-server-member-absent.yml
  playbooks/hbacrule/ensure-hbarule-allhosts-server-member-present.yml

New tests added for the module:

  tests/hbacrule/test_hbacrule.yml

ipauser: Add info about version limitation of passwordexpiration

The information about the version limitation of the passwordexpiration
parameter has been missing. The parameter is only usable for IPA versions
4.7 and up.

ipagroup: Fix changed flag, new test cases

ipagroup: Properly support IPA versions 4.6 and RHEL-7

The changed flag returned by ipagroup calls have not been correct. This
change fixes this. Addtitionally new test cases have been added to make
sure that the changed flag is correct.

group_add_member is only supporting services in more recent IPA versions.
This is 4.7+. Code has been added to detect if services are supported by
the used IPA version and used in the parameters of the module. In this case
an error is printed.

Additionally all parameters will be get from the module using
module_params_get provided by ansible_freeipa_module. Additional to_text
conversions have been removed as they are not needed anymore with this.

New hbacsvcgroup (HBAC Service Group) management module

There is a new hbacsvcgroup (HBAC Service Group) management module placed
in the plugins folder:

  plugins/modules/ipahbacsvcgroup.py

The hbacsvc module allows to ensure presence and absence of HBAC Service
Groups.

Here is the documentation for the module:

  README-hbacsvcgroup.md

New example playbooks have been added:

  playbooks/hbacsvcgroup/ensure-hbacsvcgroup-absent.yml
  playbooks/hbacsvcgroup/ensure-hbacsvcgroup-member-absent.yml
  playbooks/hbacsvcgroup/ensure-hbacsvcgroup-member-present.yml
  playbooks/hbacsvcgroup/ensure-hbacsvcgroup-present.yml

New tests added for the module:

   tests/hbacsvcgroup/test_hbacsvcgroup.yml

Updated requirements for python3-gssapi

New hbacsvc (HBAC Service) management module

There is a new hbacsvc (HBAC Service) management module placed in the plugins
folder:

  plugins/modules/ipahbacsvc.py

The hbacsvc module allows to ensure presence and absence of HBAC Services.

Here is the documentation for the module:

  README-hbacsvc.md

New example playbooks have been added:

  playbooks/hbacsvc/ensure-hbacsvc-absent.yml
  playbooks/hbacsvc/ensure-hbacsvc-present.yml

New tests added for pwpolicy:

  tests/hbacsvc/test_hbacsvc.yml