How to access an Elasticsearch stored in a Docker container from outside?

Question

I'm currently runnning Elasticsearch (ES) 5.5 inside a Docker container. (See below)

curl -XGET 'localhost:9200'
{
  "name" : "THbbezM",
  "cluster_name" : "elasticsearch",
  "cluster_uuid" : "CtYdgNUzQrS5YRTRT7xNJw",
  "version" : {
    "number" : "5.5.0",
    "build_hash" : "260387d",
    "build_date" : "2017-06-30T23:16:05.735Z",
    "build_snapshot" : false,
    "lucene_version" : "6.6.0"
  },
  "tagline" : "You Know, for Search"
}

I've changed the elasticsearch.yml file to look like this:

http.host: 0.0.0.0

# Uncomment the following lines for a production cluster deployment
#transport.host: 0.0.0.0
#discovery.zen.minimum_master_nodes: 1

network.host: 0.0.0.0
http.port: 9200

I can currently get my indexes through curl -XGET commands. The thing here is that I wanted to be able to do http requests to this ES instance using it's Ip Address instead of the 'localhost:9200' setting starting from my machine (Mac OS X).

So, what I've tried already:

1) I've tried doing it in Postman getting the following response:

Could not get any response
There was an error connecting to X.X.X.X:9200/.
Why this might have happened:
The server couldn't send a response:
Ensure that the backend is working properly
Self-signed SSL certificates are being blocked:
Fix this by turning off 'SSL certificate verification' in Settings > General
Client certificates are required for this server:
Fix this by adding client certificates in Settings > Certificates
Request timeout:
Change request timeout in Settings > General

2) I also tried in Sense (Plugin for Chrome):

Request failed to get to the server (status code: 0):

3) Running a curl from my machine's terminal won't do it too.

What am I missing here?

Answer 1

Docker for Mac提供了可以使用的DNS名称：

docker.for.mac.localhost

Answer 2

You should use the value specified under container name in the YML file to connect to your cluster. Example:

services:
  elasticsearch:
    container_name: 'example_elasticsearch'
    image: 'docker.elastic.co/elasticsearch/elasticsearch:6.6.1'

In this case, elastic search is located at http://example_elasticsearch:9200 . Note that example_elasticsearch is the name of the container and may be used the same way as machine name or host name.