Spring 引导、ElasticSearch 和 TestContainers 集成测试。拒绝连接

Question

我创建了一个集成测试以从 elasticsearch 检索数据。

我正在使用 testContainer 的默认值，因此我的 RestHighLevelClient 应该可以访问测试容器，但是当我尝试索引数据时，我总是遇到相同的异常 (java.net.ConnecteException: Connection refused)，但是当我运行通过命令

在本地 docker 图像

docker run -d --rm -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" -e "transport.host=127.0.0.1"  --name elastic docker.elastic.co/elasticsearch/elasticsearch:6.5.4

我的测试工作正常。

问题出在哪里，因为端口映射是一样的？这个异常的原因是什么？

我的测试：

@ExtendWith(SpringExtension.class)
@Testcontainers
@WebMvcTest
class FlowerResourceTest {

    @Container
    private ElasticsearchContainer esContainer = new ElasticsearchContainer("docker.elastic.co/elasticsearch/elasticsearch:6.5.4");

    @Autowired
    private ElasticsearchConfiguration esConfig;

    @Autowired
    private FlowerService flowerService;

    private RestHighLevelClient client;


    @Test
    void test() throws IOException, InterruptedException {
        client = esConfig.client();

        var jsonFlower = "{\n" +
                "    \"name\": \"XXX\",\n" +
                "  \"color\" : \"red\"\n" +
                "}";
        IndexRequest indexRequest = new IndexRequest("flowers", "doc", "1")
                .source(jsonFlower, XContentType.JSON);


        assertTrue(esContainer.isRunning());
        client.index(indexRequest, RequestOptions.DEFAULT);


        var flowers = flowerService.findAll();


        assertTrue(flowers.size() > 0);

        DeleteRequest deleteRequest = new DeleteRequest("flowers", "doc", "1");

        client.delete(deleteRequest, RequestOptions.DEFAULT);
    }
}

Answer 1

除非您进行不同的配置，否则默认端口为 9200。因此，如果您的客户端尝试连接到默认端口，您需要确保 9200 可用，以便 Testcontainers 中的 Elasticsearch 可以在该端口上启动.
我猜 Elasticsearch 没有足够的时间启动。这是一个 Java 过程，可能需要一些时间 — 在我的机器上大约需要 20 秒。您可能需要设置一个等待策略；像这样：
```
esContainer.setWaitStrategy(
        Wait.forHttp("/")
                .forPort(9200)
                .forStatusCode(200)
                .withStartupTimeout(Duration.ofSeconds(60)));
```

Answer 2

如果我没记错的话，你可以使用以下命令请求暴露的端口：

esContainer.getMappedPort(ELASTICSEARCH_PORT);

Docker 容器公开了一个随机可用端口，因此请使用上述命令检查端口。将该端口用于客户端。如果您有兴趣，我的一位同事写了一篇关于此的博客 post，其中包含一些示例代码： https://amsterdam.luminis.eu/2018/08/20/elasticsearch-instances-for-integration-testing/

Answer 3

尝试这样使用它

    @Container
    private static ElasticsearchContainer elasticsearchContainer = new ElasticTestContainer();
    private RestHighLevelClient client;

    @BeforeClass
    public static void init(){
       elasticsearchContainer.start();
    }

    @Test
    void test() throws IOException, InterruptedException {
        RestClientBuilder restClientBuilder = RestClient.builder(new HttpHost(elasticsearchContainer.getHost(), 9200, "http"));
        client = new RestHighLevelClient(restClientBuilder);
        

        var jsonFlower = "{\n" +
                "    \"name\": \"XXX\",\n" +
                "  \"color\" : \"red\"\n" +
                "}";
        IndexRequest indexRequest = new IndexRequest("flowers", "doc", "1")
                .source(jsonFlower, XContentType.JSON);


        assertTrue(elasticsearchContainer.isRunning());
        client.index(indexRequest, RequestOptions.DEFAULT);


        var flowers = flowerService.findAll();


        assertTrue(flowers.size() > 0);

        DeleteRequest deleteRequest = new DeleteRequest("flowers", "doc", "1");

        client.delete(deleteRequest, RequestOptions.DEFAULT);
    }

ElasticTestContainer class

public class ElasticTestContainer extends ElasticsearchContainer {

    private static final String DOCKER_ELASTIC = "docker.elastic.co/elasticsearch/elasticsearch:6.5.4";

    private static final String CLUSTER_NAME = "sample-cluster";

    private static final String ELASTIC_SEARCH = "elasticsearch";

    public ElasticTestContainer() {
        super(DOCKER_ELASTIC);
        this.addFixedExposedPort(9200, 9200);
        this.addFixedExposedPort(9300, 9300);
        this.addEnv(CLUSTER_NAME, ELASTIC_SEARCH);
    }
}

Spring 引导、ElasticSearch 和 TestContainers 集成测试。拒绝连接

Spring boot, ElasticSearch and TestContainers integration tests. Connection refused

java

elasticsearch

spring-boot

testcontainers