access elasticsearch running in docker in aws - amazon-web-services

Question

I am running an elasticsearch service in docker in aws, and i have another docker container that runs a dotnet application; this is an excerpt of the docker-compose file i am using
version: '3.1'
services:
someservice:
build:
context: ./
dockerfile: Dockerfile
args:
- AWS_ACCESS_KEY_ID
- AWS_REGION
- AWS_SECRET_ACCESS_KEY
- AWS_SESSION_TOKEN
restart: always
container_name: some-server
ports:
- 8080:8080
links:
- elastic
elastic:
image: docker.elastic.co/elasticsearch/elasticsearch:6.4.0
environment:
TAKE_FILE_OWNERSHIP: "true"
volumes:
- ./.data/elastic:/usr/share/elasticsearch/data
ports:
- 9200:9200
- 9300:9300
ulimits:
nofile:
soft: "65536"
hard: "65536"
and this is an excerpt of the Dockerfile
FROM microsoft/dotnet:2.2-sdk AS build-env
WORKDIR /app
WORKDIR /app
RUN mkdir /Service/
WORKDIR /app/Service/
COPY local_foler/Service/*.csproj ./
RUN dotnet restore
# Copy everything else and build
COPY local_folder/Service/. ./
RUN dotnet publish -c Release -o out
# Build runtime image
FROM microsoft/dotnet:aspnetcore-runtime
ARG AWS_ACCESS_KEY_ID
ARG AWS_SECRET_ACCESS_KEY
ENV AWS_SECRET_ACCESS_KEY=$AWS_SECRET_ACCESS_KEY
ENV AWS_ACCESS_KEY_ID=$AWS_ACCESS_KEY_ID
ENV ASPNETCORE_URLS="http://0.0.0.0:8080"
EXPOSE 8080
WORKDIR /app
COPY --from=build-env /app/Service/out .
ENTRYPOINT ["dotnet", "Service.dll"]
in the Service application i am using NEST client, something like this
var settings = new ConnectionSettings(new Uri(ELASTIC_SERVICE_URI)).DefaultIndex("some-index").EnableDebugMode();
var client = new ElasticClient(settings);
var pingResponse = client.Ping();
if (pingResponse.IsValid)
{
string searchTerm = "*";
if (searchParam != null)
{
searchTerm = "*" + WebUtility.UrlDecode(searchParam) + "*";
}
int from = (int)(fromParam == null ? 0 : fromParam);
int size = (int)(sizeParam == null ? 10 : sizeParam);
var searchResponse = client.Search<SomeType>(s => s
.From(from)
.Size(size)
.AllTypes()
.Query(q => q
.Bool(bq => bq
.Must(m => m
.QueryString(qs => qs
.Query(searchTerm)
.AnalyzeWildcard(true)
.DefaultField("*")
)
)
)
)
);
return Ok(searchResponse.Documents);
if i run the docker containers locally, i can set the ELASTIC_SERVICE_URI const to http://elastic:9200 and it works; i even can point that to the elastic service running in aws like this https://HOST.us-east-2.es.amazonaws.com
in both cases the service works fine and the data from the search is returning
but when i run the containers from aws the data is not retrieved, i just get an empty collection
what can be wrong ?