add mirror role and enable syncs on mirror group

roles/mirror/sync/defaults/main.yml

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+---
+rsyncoptions: []
+postcmd: ""

roles/mirror/sync/meta/main.yml

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+---
+dependencies:
+  - {role: mirror/base}

roles/mirror/sync/tasks/main.yml

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+
+---
+
+- name: create config for {{ label }}
+  template:
+    dest: "/etc/sync-mirrors/{{ label }}.conf"
+    src: mirror.conf.j2
+    mode: 0644
+    owner: root
+    group: root
+
+- name: create target directory
+  file:
+    path: "/srv/mirrors/{{ label }}"
+    state: directory
+    mode: 0755
+    owner: mirror
+    group: mirror

roles/mirror/sync/templates/mirror.conf.j2

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+SRC="{{ source }}"
+RSYNCOPTS="{{ rsyncoptions | join(' ') }}"