.. _config_http_filters_set_metadata: Set Metadata ============ * :ref:`v3 API reference ` * This filter should be configured with the name *envoy.filters.http.set_metadata*. This filters adds or updates dynamic metadata with static data. Dynamic metadata values are updated with the following scheme. If a key does not exists, it's just copied into the current metadata. If the key exists but has a different type, it is replaced by the new value. Otherwise: * for scalar values (null, string, number, boolean) are replaced with the new value * for lists: new values are added to the current list * for structures: recursively apply this scheme For instance, if the namespace already contains this structure: .. code-block:: yaml myint: 1 mylist: ["a"] mykey: ["val"] mytags: tag0: 1 and the value to set is: .. code-block:: yaml myint: 2 mylist: ["b","c"] mykey: 1 mytags: tag1: 1 After applying this filter, the namespace will contain: .. code-block:: yaml myint: 2 mylist: ["a","b","c"] mykey: 1 mytags: tag0: 1 tag1: 1 Statistics ---------- Currently, this filter generates no statistics.