getting UnknownHostException when calling an API on another container using the container name

Docker Engine Compose
1

i’ve no idea why this isn’t working so very much need your help.

this is my docker-compose:

version: "3.3"

services:
  service1:
    restart: always
  service2:
    restart: always
    expose:
      - "8080"
    ports:
      - "8080:8080"

service1 has integration tests that needs to call the API on service2. and i’m using com.avast.gradle.docker-compose plugin to make sure docker is initialized before the tests are run. so this is what i have in my build.gradle for service1:

dockerCompose {
    useComposeFiles = ["$project.rootDir/docker-compose.yml"]
    forceRecreate = true
    isRequiredBy(project.tasks.getByPath(':service1:test'))
}

the integration test is something like this:

String url = String.format("http://%s:8080/status", "service2");
HttpGet httpGet = new HttpGet(url);
httpGet.setHeader("Content-Type", "application/json");

try (CloseableHttpClient httpClient = HttpClientBuilder.create().build()) {
    HttpResponse response = httpClient.execute(httpGet);
}

but this is the exception i’m getting:

java.net.UnknownHostException: service2
        at java.base/java.net.InetAddress$CachedAddresses.get(InetAddress.java:797)

any idea what is going on?

2

The forum software queued your post for review. Did you also ask this elsewhere? Then please at least add links to the other post and back here.

3

hello! i did post on stackoverflow here: docker: getting UnknownHostException when calling an API on another container using the container name - Stack Overflow

but no luck yet.