user newer version of apt-cacher-ng, but with low expectation

roles/apt_cacher_ng/tasks/main.yml

@@ -1,4 +1,28 @@
 ---
+- name: Use a newer version of apt cacher nc for ubuntu 20.04
+  block:
+    - name: Set the default release
+      lineinfile:
+        path: /etc/apt/apt.conf.d/01-vendor-ubuntu
+        regexp: '^APT::Default-Release '
+        line: "APT::Default-Release \"{{ ansible_facts['lsb']['codename'] }}\";"
+    - name: Pin node exporter
+      copy:
+        dest: /etc/apt/preferences.d/pin-apt-cacher-nc
+        content: |
+          Package: apt-cacher-nc
+          Pin: release n={{ ansible_facts['lsb']['codename'] }}
+          Pin-Priority: -10
+
+          Package: apt-cacher-nc
+          Pin: release n=groovy
+          Pin-Priority: 900
+    - name: Add the repo from groovy
+      apt_repository:
+        repo: deb http://fr.archive.ubuntu.com/ubuntu groovy universe
+        state: present
+  when: ansible_facts['lsb']['id'] == 'Ubuntu' and ansible_facts['lsb']['codename'] == 'focal'
+
 - name: Install apt-cacher-ng
   apt:
     name: