var lookup = {},
	result = [];

JSON.parse(value).forEach(function (item) {
		var envoy_cluster_name = item.labels.envoy_cluster_name;

		if (lookup[envoy_cluster_name]) {
			return;
		}
		lookup[envoy_cluster_name] = 1;
		result.push({
			'{#CLUSTER_NAME}': envoy_cluster_name
		});
});

return JSON.stringify(result);