Spring boot + elasticsearch prefix adding doen't work

Question

I have this entity:

@Data
@Document(indexName = "foo.user")
public class ElUser {

    @Id
    private  String id;

    @Field(type = FieldType.Text)
    private String fullName;
}

And this Repository:

@Repository
interface ElasticsearchUserRepository extends ElasticsearchRepository<ElUser, String> {
List<ElUser> findAllByFullNameIsLike(String name);
}

And it works fine. But I want to use a prefix like this(.withPathPrefix("foo")):

@EnableElasticsearchRepositories
@Configuration
public class ElasticsearchConfig extends AbstractElasticsearchConfiguration {

    @Bean
    @Override
    public RestHighLevelClient elasticsearchClient() {

        final ClientConfiguration clientConfiguration = ClientConfiguration.builder()
                .connectedTo("localhost:9200")
                .withPathPrefix("foo")
                .build();

        return RestClients.create(clientConfiguration).rest();
    }
}

And remove it from entity:

@Document(indexName = "user")

But I get an exception:

org.springframework.data.elasticsearch.NoSuchIndexException: Index [foo] not found.; nested exception is [foo] ElasticsearchStatusException[Elasticsearch exception [type=index_not_found_exception, reason=no such index [foo]]]

Answer 1

The path prefix you can configure is not a prefix for the index name like foo in foo.user, it's for the path in the URL which might be needed for some routing/proxying/dispatching software between the application and Elasticsearch.

Let's imagine you have two Elasticsearch clusters at foo:9200 and bar:9200 and there is a nginx proxy in front of them at proxy:8080 which will route an request to proxy:8080/foo/abc to foo:9200/abc and proxy:8080/bar/abc to bar:9200/abc, then you would configure you client to connect to proxy:8080 with a pathPrefix of foo.

So it's not for the use case you have.

Edit:

I have an example of how to provide an index prefix in my blog post "How to provide a dynamic index name in Spring Data Elasticsearch using SpEL", in the section Use a value from the application configuration, that might fit your needs.

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