Using redis-trib.rb because it works ...

postservice/91-redis-init

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+#
+# Cluster init !
+#
+
+redisTrib="/usr/share/doc/redis-tools/examples/redis-trib.rb"
+CONF="/etc/redis/cluster.conf"
+
+if [[ -f ${1} ]]
+then
+	CONF=${1}
+fi
+
+if [[ -f "${CONF}" ]]
+then
+	LEADER=$(awk -F ':' '/^leader/ {print $2 ":" $3}' ${CONF})
+
+	REPLICA=$(${redisTrib} check ${LEADER} | awk '/additional replica/ {print $1}')
+
+	if [[ ${REPLICA} -eq 0 ]]
+	then
+		# Create Cluster
+		yes yes | ${redisTrib} create --replicas 1 $(awk -F ':' '{printf "%s:%s ", $2, $3}' ${CONF})
+	fi
+else
+	echo "${CONF} is missing"
+	exit 0
+fi