Simple role that installs freeradius and a list of freeradius modules. The configuration must be part of another role or playbook.

library/roles/freeradius/defaults/main.yml

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+---
+freeradius_install: True
+freeradius_pkgs:
+  - freeradius
+  - freeradius-config
+  - freeradius-utils
+
+freeradius_additional_modules: []
+  #- freeradius-dhcp - DHCP module for FreeRADIUS server
+  #- freeradius-iodbc - iODBC module for FreeRADIUS server
+  #- freeradius-ldap - LDAP module for FreeRADIUS server
+  #- freeradius-mysql - MySQL module for FreeRADIUS server
+  #- freeradius-postgresql - PostgreSQL module for FreeRADIUS server
+  #- freeradius-redis - Redis module for FreeRADIUS server
+  #- freeradius-rest - REST module for FreeRADIUS server
+  #- freeradius-yubikey - Yubikey module for FreeRADIUS server
+
+freeradius_memcache_module: True
+freeradius_local_memcache_support: '{{ freeradius_memcache_module }}'
+freeradius_redis_module: False
+freeradius_local_redis_support: '{{ freeradius_redis_module }}'
+
+freeradius_to_be_disabled_modules: []
+
+freeradius_enabled_modules: []

library/roles/freeradius/meta/main.yml

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+---
+dependencies:
+  - { role: '../../library/roles/memcached', when: freeradius_local_memcache_support }
+  - { role: '../../library/roles/redis', when: freeradius_local_redis_support }
+

library/roles/freeradius/tasks/main.yml

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+---
+- block:
+  - name: Install the core freeradius packages
+    apt: pkg={{ freeradius_pkgs }} state=present cache_valid_time=3600
+
+  - name: Install the additional freeradius packages
+    apt: pkg={{ freeradius_additional_modules }} state=present cache_valid_time=3600
+
+  - name: Install the freeradius memcached module if needed
+    apt: pkg=freeradius-memcached state=present cache_valid_time=3600
+    when: freeradius_memcache_module
+
+  - name: Install the freeradius redis module if needed
+    apt: pkg=freeradius-redis state=present cache_valid_time=3600
+    when: freeradius_redis_module
+
+  tags: freeradius
+
+- block:
+  - name: Disable some modules
+    file: dest=/etc/freeradius/3.0/mods-enabled/{{ item }} state=absent
+    with_items: '{{ freeradius_to_be_disabled_modules }}'
+
+  - name: Enable some modules
+    file: src=/etc/freeradius/3.0/mods-available/{{ item }} dest=/etc/freeradius/3.0/mods-enabled/{{ item }} state=link
+    with_items: '{{ freeradius_enabled_modules }}'
+
+  tags: [ 'freeradius', 'freeradius_modules' ]