diff --git a/bitwarden/metadata.yml b/bitwarden/metadata.yml
index fc97b6d..473e6b0 100644
--- a/bitwarden/metadata.yml
+++ b/bitwarden/metadata.yml
@@ -12,4 +12,9 @@ uses:
     default-options:
       ## We need to specify here the port as it can't be infered
       ## easily as there are 2 ports exposed by the image.
-      target: !var-expand ${MASTER_BASE_SERVICE_NAME}:80
\ No newline at end of file
+      target: !var-expand ${MASTER_BASE_SERVICE_NAME}:80
+  backup:
+    constraint: recommended
+    auto: pair
+    solves:
+      backup: "Automatic regular backup"
diff --git a/mongo/metadata.yml b/mongo/metadata.yml
index 1cc47fd..b1bee6c 100644
--- a/mongo/metadata.yml
+++ b/mongo/metadata.yml
@@ -15,3 +15,21 @@ uses:
       backup: "Automatic regular backups"
     default-options:
       schedule: "47 * * * *"  ## schedule backup every hour
+  ## This one is useful only if previous relation is used
+  backup:
+    constraint: optional
+    auto: pair
+    solves:
+      backup: "Automatic regular backups of dumps"
+    default-options:
+      ## First pattern matching wins, no pattern matching includes.
+      ## include-patterns are checked first, then exclude-patterns
+      ## Patterns rules:
+      ##  - ending / for directory
+      ##  - '*' authorized
+      ##  - must start with a '/', will start from $SERVICE_DATASTORE
+      # include-patterns:
+      #   - /var/backups/mongo/
+      exclude-patterns:
+        - "/var/lib/"                          ## mongo working data files
+        - "/var/backups/mongo/*.inprogress/"   ## database dump in progress
diff --git a/nextcloud/metadata.yml b/nextcloud/metadata.yml
index a622ae1..309dc45 100644
--- a/nextcloud/metadata.yml
+++ b/nextcloud/metadata.yml
@@ -23,3 +23,8 @@ uses:
       proxy: "Public access"
     default-options:
       target: !var-expand ${MASTER_BASE_SERVICE_NAME}:80
+  backup:
+    constraint: recommended
+    auto: pair
+    solves:
+      backup: "Automatic regular backup"
diff --git a/rocketchat/metadata.yml b/rocketchat/metadata.yml
index 654fe56..e362c52 100644
--- a/rocketchat/metadata.yml
+++ b/rocketchat/metadata.yml
@@ -30,4 +30,9 @@ uses:
           RewriteCond %{HTTP:UPGRADE} ^WebSocket$ [NC,OR]
           RewriteCond %{HTTP:CONNECTION} ^Upgrade$ [NC]
           RewriteRule .* ws://${MASTER_BASE_SERVICE_NAME}:3000%{REQUEST_URI} [P,QSA,L]
+  backup:
+    constraint: recommended
+    auto: pair
+    solves:
+      backup: "Automatic regular backup"