Add xtrabackup repo on RHEL

galera/map.jinja

     'config': '/etc/mysql/my.cnf',
   },
   'RedHat': {
-    'pkgs': ['galera', 'mariadb-server', 'mariadb', 'MySQL-python', 'rsync'],
+    'pkgs': ['galera', 'mariadb-galera-server', 'mariadb', 'MySQL-python', 'rsync', 'percona-xtrabackup-21'],
+    'xtrabackup_repo': 'http://www.percona.com/downloads/percona-release/redhat/0.1-3/percona-release-0.1-3.noarch.rpm',
     'service': 'mariadb',
     'wsrep_provider': '/usr/lib64/galera/libgalera_smm.so',
     'log_file': '/var/log/mariadb/mariadb.log',
     'config': '/etc/mysql/my.cnf',
   },
   'RedHat': {
-    'pkgs': ['galera', 'mariadb-server', 'mariadb', 'MySQL-python', 'rsync'],
+    'pkgs': ['galera', 'mariadb-galera-server', 'mariadb', 'MySQL-python', 'rsync', 'percona-xtrabackup-21'],
+    'xtrabackup_repo': 'http://www.percona.com/downloads/percona-release/redhat/0.1-3/percona-release-0.1-3.noarch.rpm',
     'service': 'mariadb',
     'wsrep_provider': '/usr/lib64/galera/libgalera_smm.so',
     'log_file': '/var/log/mariadb/mariadb.log',

galera/master.sls

 {%- from "galera/map.jinja" import master with context %}
 {%- if master.enabled %}
 
+{%- if grains.os_family == 'RedHat' %}
+xtrabackup_repo:
+  pkg.installed:
+  - sources:
+    - percona-xtrabackup: {{ master.xtrabackup_repo }}
+  - require_in:
+    - pkg: galera_packages
+{%- endif %}
+
 galera_packages:
   pkg.installed:
   - names: {{ master.pkgs }}

galera/slave.sls

 {%- 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 }}