ipaserver: Add support for DNS over TLS

This change adds support for DNS over TLS to the ipaserver role.

New variables

ipaserver_dot_forwarders
    List of DNS over TLS forwarders. Required if ipaserver_dns_over_tls
    is enabled. (list of strings)
    required: false
ipaserver_dns_over_tls | ipaclient_dns_over_tls
    Configure DNS over TLS. Requires FreeIPA version 4.12.5 or later.
    (bool, default: false)
    required: false
ipaserver_dns_over_tls_cert
    Certificate to use for DNS over TLS. If empty, a new certificate will
    be requested from IPA CA. (string)
    required: false
ipaserver_dns_over_tls_key
    Key for certificate specified in ipaserver_dns_over_tls_cert. (string)
    required: false
ipaserver_dns_policy
    Encrypted DNS policy. Only usable if `ipaserver_dns_over_tls` is
    enabled. (choice: relaxed, enforced, default: relaxed)
    required: false

New distribution specific variable

ipaserver_packages_dot
    List of IPA packages needed for DNS over TLS.

roles/ipaserver/vars/Fedora.yml

@@ -3,5 +3,6 @@
 ---
 ipaserver_packages: [ "freeipa-server", "python3-libselinux" ]
 ipaserver_packages_dns: [ "freeipa-server-dns" ]
+ipaserver_packages_dot: [ "freeipa-server-encrypted-dns" ]
 ipaserver_packages_adtrust: [ "freeipa-server-trust-ad" ]
 ipaserver_packages_firewalld: [ "firewalld" ]

roles/ipaserver/vars/RedHat-7.yml

@@ -3,5 +3,6 @@
 ---
 ipaserver_packages: [ "ipa-server", "libselinux-python" ]
 ipaserver_packages_dns: [ "ipa-server-dns" ]
+ipaserver_packages_dot: [ ]
 ipaserver_packages_adtrust: [ "ipa-server-trust-ad" ]
 ipaserver_packages_firewalld: [ "firewalld" ]

roles/ipaserver/vars/RedHat-8.yml

@@ -3,5 +3,6 @@
 ---
 ipaserver_packages: [ "@idm:DL1/server" ]
 ipaserver_packages_dns: [ "@idm:DL1/dns" ]
+ipaserver_packages_dot: [ ]
 ipaserver_packages_adtrust: [ "@idm:DL1/adtrust" ]
 ipaserver_packages_firewalld: [ "firewalld" ]

roles/ipaserver/vars/Ubuntu-18.04.yml

@@ -2,6 +2,7 @@
 ---
 ipaserver_packages: [ "freeipa-server" ]
 ipaserver_packages_dns: [ "freeipa-server-dns" ]
+ipaserver_packages_dot: [ ]
 ipaserver_packages_adtrust: [ "freeipa-server-trust-ad" ]
 ipaserver_packages_firewalld: [ "firewalld" ]
 # Ubuntu Bionic Beaver must use python2 as Python interpreter due

roles/ipaserver/vars/Ubuntu.yml

@@ -3,5 +3,6 @@
 ---
 ipaserver_packages: [ "freeipa-server" ]
 ipaserver_packages_dns: [ "freeipa-server-dns" ]
+ipaserver_packages_dot: [ ]
 ipaserver_packages_adtrust: [ "freeipa-server-trust-ad" ]
 ipaserver_packages_firewalld: [ "firewalld" ]

roles/ipaserver/vars/default.yml

@@ -3,5 +3,6 @@
 ---
 ipaserver_packages: [ "ipa-server", "python3-libselinux" ]
 ipaserver_packages_dns: [ "ipa-server-dns" ]
+ipaserver_packages_dot: [ "ipa-server-encrypted-dns" ]
 ipaserver_packages_adtrust: [ "freeipa-server-trust-ad" ]
 ipaserver_packages_firewalld: [ "firewalld" ]