change elasticsearch repo to upstream
diff --git a/linux/system/repo/glusterfs.yml b/linux/system/repo/glusterfs.yml
index da4cddf..3dfa9f9 100644
--- a/linux/system/repo/glusterfs.yml
+++ b/linux/system/repo/glusterfs.yml
@@ -3,7 +3,7 @@
     system:
       repo:
         glusterfs-ppa:
-          source: "deb http://ppa.launchpad.net/gluster/glusterfs-3.7/ubuntu trusty main"
+          source: "deb http://ppa.launchpad.net/gluster/glusterfs-3.7/ubuntu ${_param:linux_system_codename} main"
           architectures: amd64
           key_id: 3FE869A9
           key_server: keyserver.ubuntu.com
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