I am running a theia docker container behind a nginx-proxy server container (jwilder/nginx-proxy).
Inside theia, I am running a simple ExpressJS app on port no. 8001.
I am able to access the container publicly using a sub-domain.
How do I access the app running inside the container publicly?
Code used to run nginx-proxy on docker
docker run -d -p 80:80 --name nginx-proxy --net nginx-proxy -v /var/run/docker.sock:/tmp/docker.sock jwilder/nginx-proxy
Code used to run theia on docker
docker run -d --name theia --expose 3000 --net nginx-proxy -e VIRTUAL_HOST=theia.example.com theia:theia1
The theia container is accessible publicly using http://theia.example.com.
This obviously does not work: http://theia.example.com:8001
I have tried implementing https://github.com/jwilder/nginx-proxy/pull/259 using the image mashupmill/nginx-proxy as well as ncadou/nginx-proxy
After replacing the container running jwilder/nginx-proxy with mashupmill/nginx-proxy, I ran:
docker run -d --name theia --expose 3000 --net nginx-proxy -e VIRTUAL_HOST="theia.example.com=>http:80,app.example.com=>http:8001" -e VIRTUAL_PROTO=http theia:theia1
I am not sure if I am misunderstood what mashupmill/nginx-proxy does or if I am doing something wrong.
Ideally the above should have opened theia at http://theia.example.com and the Express app at http://app.example.com.
Accessing the app running inside the theia container is not a problem when running docker locally. I can get the local IP address of the theia container and open theia with http://172.16.0.2:3000 and the app with http://172.16.0.2:8001.
The problem arises when I am trying to host docker elsewhere and then trying to access the app using the public IP of the server. Using nginx-proxy, I am able to route to the theia container but am not sure how to route to the app running inside the theia container as well.
I have also tried exposing another port using:
docker run -d --name theia --expose 3000 --expose 8001 --net nginx-proxy -e VIRTUAL_HOST=theia.example.com theia:theia1
and mapping the external port to the internal port:
docker run -d --name theia --expose 3000 -p 8001:8001 --net nginx-proxy -e VIRTUAL_HOST=theia.example.com theia:theia1
Both of the above give a 502 Bad Gateway error for the URL http://theia.example.com.
Following are the other codes and commands I used:
Express code (app.js)
const express = require('express')
const app = express()
const port = 8001
app.get('/', (req, res) => res.send('Hello World!'))
app.listen(port, () => console.log(`Example app listening on port ${port}!`))
After installing Express using npm install express and running the app node app.js, following is the output on the console:
theia@3a9d843bf70e:/home/project$ node app.js
Example app listening on port 8001!
Dockerfile
FROM ubuntu:18.04
RUN apt-get update && apt-get -y install curl xz-utils wget gpg
RUN curl -sL https://deb.nodesource.com/setup_8.x | bash
RUN apt-get install --yes nodejs
#check for more node installation
RUN apt-get update && apt-get install -y python build-essential
RUN npm install -g yarn
RUN apt-get -y install git sudo
RUN adduser --disabled-password --gecos '' theia && \
adduser theia sudo && \
echo '%sudo ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers;
RUN chmod g+rw /home && \
mkdir -p /home/project && \
chown -R theia:theia /home/project;
USER theia
WORKDIR /home/theia
ADD next.package.json ./package.json
RUN yarn --cache-folder ./ycache && rm -rf ./ycache
RUN yarn theia build
EXPOSE 3000
ENV SHELL /bin/bash
ENTRYPOINT [ "yarn", "theia", "start", "/home/project", "--hostname=0.0.0.0" ]
next.package.json
{
"private": true,
"dependencies": {
"typescript": "latest",
"@theia/typescript": "next",
"@theia/navigator": "next",
"@theia/terminal": "next",
"@theia/outline-view": "next",
"@theia/preferences": "next",
"@theia/messages": "next",
"@theia/git": "next",
"@theia/file-search": "next",
"@theia/markers": "next",
"@theia/preview": "next",
"@theia/callhierarchy": "next",
"@theia/merge-conflicts": "next",
"@theia/search-in-workspace": "next",
"@theia/json": "next",
"@theia/textmate-grammars": "next",
"@theia/mini-browser": "next"
},
"devDependencies": {
"@theia/cli": "next"
}
}
Building the image
docker build --tag "theia:theia1" .
