Avoid connection close when processing huge amounts of unchanged data

roles/docker/tasks/services/restic_backup.yml

@@ -31,6 +31,14 @@
     mode: '0644'
     state: touch
 
+- name: Create SSH config
+  template:
+    src: restic.ssh.config.j2
+    dest: "{{ services.restic.volume_folder }}/ssh/config"
+    owner: root
+    group: root
+    mode: '0600'
+
 - name: Setup restic backup
   docker_compose:
     project_name: restic_backup

roles/docker/templates/restic.ssh.config.j2

@@ -0,0 +1,3 @@
+Host {{ services.restic.domain }}
+    ServerAliveInterval 60
+    ServerAliveCountMax 240