Connect python with h2o that runs in docker, but ipv4 for h2o changes

Question

I'm new to docker and I'm trying to run h2o in docker and then use python to connect to it. I have folder with: model-generator folder in which I have the python script and Dockerfile to build an image h2o-start folder in which I have h2o.jar file and Dockerfile to start that jar docker-compose.yml file with:

version: "3"
services:
   h2o-start:
      image: milanpanic2/h2o-start
      build: 
         context: ./h2o-start
      restart: always
   model-generator:
      image: milanpanic2/model-generator
      build:
         context: ./model-generator
      restart: always

My python script contains:

import h2o   

h2o.connect(ip='172.19.0.3', port='54321')

When I run docker-compose up it gives me an error that python can't connect, because there isn't anything on 172.19.0.3

Dockerfile for python

FROM python:2.7-slim
WORKDIR /app
ADD . /app
RUN pip install > --trusted-host pypi.python.org -r requirements.txt 
EXPOSE 80 
ENV NAME World 
CMD ["python", "passhash.py"]

Dockerfile for h2o

FROM openjdk:8
ADD h2o.jar h2o.jar
EXPOSE 54321 EXPOSE 54322
ENTRYPOINT ["java", "-jar", "h2o.jar"]

Possible duplicate of [How to connect to docker container from localhost](https://stackoverflow.com/questions/48931857/how-to-connect-to-docker-container-from-localhost) — David Maze, Jul 03 '18 at 09:49

score 2 · Accepted Answer · answered Jul 03 '18 at 08:25

2

Try to start container exposing port 54321: add to your h2o-start: in docker-compose file:

ports: 
  - "54321:54321"
  - "54322:54322"

answered Jul 03 '18 at 08:25

Alejandro Galera

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Now, I just redirect h2o.connect(ip='127.0.0.1', port='54321'? – Milan Panic Jul 03 '18 at 08:40
Great! :) Please, as it works, upvote or accept my answer, please – Alejandro Galera Jul 03 '18 at 08:43
I connect the python to 127.0.0.1:54321 where h2o server is running, but it can't find the data.csv file, can you help ? – Milan Panic Jul 03 '18 at 09:00
I'll try, but first, can you tell me what's `data.csv` file? – Alejandro Galera Jul 03 '18 at 09:01
It is a file containing data to build the machine learning model off of – Milan Panic Jul 03 '18 at 09:13
The H2O that is running in the container and redirects it on localhost:54321 can't see users/desktop/data.csv path. I found something with volumes in docker, is it a good idead ? – Milan Panic Jul 03 '18 at 09:14
Try to mount volume for that file. Save it in your host and share it with both containers with `--volume` option. – Alejandro Galera Jul 03 '18 at 09:15

Connect python with h2o that runs in docker, but ipv4 for h2o changes

1 Answers1