How to expose graphql oasgraph in Docker image?

I am creating an application in loopback 4, using graphql.

The problem I have is that I can not expose graphql oasgraph in Docker image

I have two options: 1 - Create a new dockerfile to expose graphql. 2 - Use the same loopback dockerfile to expose port 3000 (Explorer API at http://127.0.0.1:3000/explorer), and 3001 for graphql (http://127.0.0.1:3001/graphql).

How can I configure my dockerfile, in order to expose the graphql server?

https://loopback.io/doc/en/lb4/exposing-graphql-apis.html

This is my dockerfile

FIRST OPTION

# Check out https://hub.docker.com/_/node to select a new base image
FROM hasura/graphql-engine

# Create app directory (with user `node`)
RUN mkdir -p /home/node/app

WORKDIR /home/node/app

RUN npm i -g openapi-to-graphql-cli

RUN npx oasgraph http://localhost:3000/openapi.json/

# Bind to all network interfaces so that it can be mapped to the host OS
ENV HOST=0.0.0.0 PORT=3001

EXPOSE ${PORT}

CMD [ "npx", "oasgraph", "http://localhost:3000/openapi.json/" ]

SECOND OPTION:

# Check out https://hub.docker.com/_/node to select a new base image
##FROM node:10-slim
## node con oracle instant client
FROM collinestes/docker-node-oracle

# Set to a non-root built-in user `node`
USER node

# Create app directory (with user `node`)
RUN mkdir -p /home/node/app

WORKDIR /home/node/app

# Install app dependencies
# A wildcard is used to ensure both package.json AND package-lock.json are copied
# where available (npm@5+)
COPY --chown=node package*.json ./

RUN npm install
# Install openapi-to-graphql-cli 
RUN npm i openapi-to-graphql-cli


# Bundle app source code
COPY --chown=node . .

RUN npm run build

# RUN oasgraph 
RUN npx oasgraph http://localhost:3000/openapi.json/

# Bind to all network interfaces so that it can be mapped to the host OS
ENV HOST=0.0.0.0 PORT=3000

EXPOSE ${PORT}

CMD [ "node", "." ]

[dhmlau]

Cross posting from: https://github.com/strongloop/loopback-next/issues/3346#issuecomment-515555994

@fga8, I might have a working Dockerfile for you:

# Check out https://hub.docker.com/_/node to select a new base image
FROM node:10-slim

# Set to a non-root built-in user `node`
USER node

# Create app directory (with user `node`)
RUN mkdir -p /home/node/app

WORKDIR /home/node/app

# Install app dependencies
# A wildcard is used to ensure both package.json AND package-lock.json are copied
# where available (npm@5+)
COPY --chown=node package*.json ./

RUN npm install
RUN npm install openapi-to-graphql-cli

# Bundle app source code
COPY --chown=node . .

RUN npm run build

# Bind to all network interfaces so that it can be mapped to the host OS
ENV HOST=0.0.0.0 PORT=3000 PORT2=3001 .  <--- Change this line to add PORT2 here

EXPOSE ${PORT}
EXPOSE ${PORT2} <----- Add this line


CMD (npm start &) ; (sleep 5) ; (npx openapi-to-graphql http://0.0.0.0:3000/openapi.json -p 3001) <--- Change this line

I’ve indicated 3 places that you need to make changes if you’re using the Dockerfile generated by the LoopBack cli. Please note that I’m not a docker expert, so what I have above is something that works, you might be able to find a better solution.

For the sake of posterity, let me mention a few challenges:

1. oasgraph has been deprecated and the new module is openapi-to-graphql
2. In order to make sure openapi-to-graphql is not using the same port as LB, I’ve used -p option to specify the port number. (Thanks @ErikWittern)
3. I find the sleep in the CMD is needed, otherwise openapi-to-graphql will get started before the openapi is ready from LB.

Hope it helps!

[Alan-Cha]

Unfortunately, we currently do not have any example Dockerfiles. With the changes that Erik suggested, were you able to make any improvements?