Could not connect to the endpoint URL: "http://localhost:4567/"

Docker Desktop for Windows
1

Hi,

I’m trying to use a docker image to run locally an AWS Kinesis instance.
Some images used from Docker Hub are:

ruanbekker/kinesis-local

danielnegri/kinesalite

when I try to use a client, for example the list of streams with:

client.list_streams()

I receive the error:

botocore.exceptions.EndpointConnectionError: Could not connect to the endpoint URL: “http://localhost:4567/”

The same problem happen with other similar images based on Kinesis.
I follow this tutorial:

Can someone help me?
Thanks.

2

Please provide context information about how you start your containers and specifically tell us which container throws the exception.

Note: localhost on the host and localhost for any container is not the same localhost. Also localhost is local to each container.

3

Hi meyay,

thank you for your question.
Some information as you requested: I’m working on a laptop based on 64 bit windows 10 pro.
My Docker version is Docker Desktop 4.12.0 (85629).
The command sequence from cmd window to reproduce my error is:

docker pull ruanbekker/kinesis-local
docker run -it python:3.7-alpine sh

pip3 install boto3
python3
import boto3
client = boto3.Session(region_name=‘eu-west-1’).client(‘kinesis’, aws_access_key_id=‘’, aws_secret_access_key=‘’, endpoint_url=‘http://localhost:4567’)
client.list_streams()

the last command inside python container give the error…
I’m new on Docker…may it be the kinesis container is not connected with python container?
Thank you for your support.

4

I had a hunch that this would be an issue and wrote this because of that:

But what I couldn’t assume is that you only pull the kinesis image, but never run it. Plus what I quoted from my previous post: localhost is always local to the context you are in, regardless if it’s the host, or a container. It is not shared amongst the host and container or between containers.

If you want one container to access another container, both need to be added to a user defined network and use the container name to access the target container:

docker network create kinesis-net
docker run -d -p 4567:4567 --name kinesis-local --network="kinesis-net" ruanbekker/kinesis-local:latest
docker run -ti  --network="kinesis-net" python:3.7-alpine sh

Then change your client line to:

client = boto3.Session(region_name=‘eu-west-1’).client(‘kinesis’, aws_access_key_id=‘’, aws_secret_access_key=‘’, endpoint_url='http://kinesis-local:4567')

(note: this is just an illustration, do NOT copy and paste it in the console before fixing the single quotes, which are not valid single quotes).

May I suggest spending some time with this fabulous self-paced docker-training: Introduction to Containers

It should give you a solid understanding of docker concepts and how things are done in docker.