I am using Elasticsearch 5.1.1 and have 500 + indices created with default mapping provided by ES.
Now we have decided to use dynamic templates. In order to apply this template/mapping to old indices I need to reindex all indices.
What is the best way to do it? Can we use Kibana for this ? Couldn't find sufficient documentation to do so.
You can use the _reindex
API which can also reindex multiple indices. It was specifically built for this.