Add xtrabackup repo on RHEL
diff --git a/galera/slave.sls b/galera/slave.sls
index fa56091..d7bcf58 100644
--- a/galera/slave.sls
+++ b/galera/slave.sls
@@ -1,6 +1,15 @@
 {%- from "galera/map.jinja" import slave with context %}
 {%- if slave.enabled %}
 
+{%- if grains.os_family == 'RedHat' %}
+xtrabackup_repo:
+  pkg.installed:
+  - sources:
+    - percona-xtrabackup: {{ slave.xtrabackup_repo }}
+  - require_in:
+    - pkg: galera_packages
+{%- endif %}
+
 galera_packages:
   pkg.installed:
   - names: {{ slave.pkgs }}