I`ve built a small react and node js app and I would like to build from it a docker image.
This is the Dockerfile that I`ve build:
FROM node:10 AS ui-build
WORKDIR /react-express-example/client/src
COPY client/ ./client/
RUN cd client && npm install && npm run build
FROM node:10 AS server-build
WORKDIR /react-express-example/
COPY --from=ui-build /client/src ./client/src
COPY /react-express-example/package*.json ./react-express-example/
RUN cd react-express-example && npm install
COPY /react-express-example/index.js ./react-express-example/
EXPOSE 5000
CMD ["node", "./react-express-example/index.js"]
This is the file path for the app:
The whole app: C:\nodejs\react-express-example
The react app: C:\nodejs\react-express-example\client
When I build the image with the command: docker -t build react-node-image . I get the error:
=> ERROR [server-build 6/6] COPY /react-express-example/index.js ./react-express-example/ 0.0s
[server-build 6/6] COPY /react-express-example/index.js ./react-express-example/:
failed to solve with frontend dockerfile.v0: failed to build LLB: failed to compute cache key: "/react-express-example/index.js" not found: not found
I am a beginner can please someone help me with writing the Dockerfile correctly according to the path that I`ve given ?
Thanks in advance
Related
I am new to docker. I am trying to create a container for react and express and run both the containers on same network using docker compose.
Below is my dockerfile for frontend:
FROM node:alpine
WORKDIR /app
COPY package*.json ./
RUN npm install
COPY . .
EXPOSE 3000
CMD ["npm","run","start"]
Below is my dockerfile for backend
FROM node:alpine
WORKDIR /app
COPY package*.json ./
RUN NODE_ENV=development npm install
COPY . .
EXPOSE 5000
CMD ["npm","run","server"]
Below is my docker-compose.yml
version: '3'
services:
client:
build:
context: './frontend'
dockerfile: Dockerfile
ports:
- 3000:3000
container_name: react_cont
environment:
- WATCHPACK_POLLING=true
networks:
- mern
volumes:
- ./frontend:/app
depends_on:
- server
server:
build:
context: './backend'
dockerfile: Dockerfile
ports:
- 5000:5000
container_name: express_cont
networks:
- mern
volumes:
- ./backend:/app
networks:
mern:
react container is getting is created and running successfully but the express container is not getting created with an error
sh: nodemon: not found
I had installed nodemon as my dev dependency.
Any help is appreciated. Thanks in advance.
Answering my own Question.
I had installed nodemon globally in my machine but forgot to install it as a dependency for my current project.
Since nodemon was installed globally in my machine i was not getting any errors while i was trying to run my server.js using nodemon. nodemon server.js in scripts did not throw any error while i was in developing my project locally prior moving it to docker container.
But since neither my package.json had nodemon as my dependency and i had not installed it separately in my container nodemon did not get installed and it gave me error.
You can try to delete node_modules folder in your source code and add flag --production=false explicitly to the npm install command. I think it's caching problem.
You may need to install nodemon package globally in your Docker:
RUN NODE_ENV=development npm install && npm --global install nodemon
I am trying to dockerize nestjs application. I have to use approach of our devops, so I can't give all details of configuration.
Scripts in package.json typical for any nestjs application.
I have Dockerfile.backend:
FROM some.registry.net/docker/node16 as builder
WORKDIR /opt/app
COPY --chown=app:app ./nestjs/nest-project .
RUN yarn install --non-interactive --production --frozen-lockfile
FROM some.registry.net/docker/node16 as serve
WORKDIR /opt/app
ENV NODE_ENV=production
ENV APP_CONFIG=/opt/app/config/config.yaml
COPY --chown=app:app ./build/Procfile /opt/startup/Procfile
COPY --chown=app:app ./build/config.yaml ./config/config.yaml
COPY --chown=app:app --from=builder /opt/app/ ./
COPY --chown=app:app --from=builder /opt/app/node_modules ./node_modules
USER root
##RUN npm install pm2 -g
##RUN npm install -g nodemon
RUN npm run build
CMD ["/opt/startup/entrypoint.sh"]
And I have docker-compose.yml file:
version: "2"
services:
backend:
build:
context: .
dockerfile: ./build/Dockerfile.backend
command: npm run start
##volumes:
##- ./nestjs/nest-project:/app
##- /app/node_modules
ports:
- 4001:4001
- 9229:9229
environment:
- NODE_ENV=development
- PORT=4001
- REACT_APP_PROD=0
- REACT_APP_BACKEND_URL=http://127.0.0.1:4001
- FRONTEND_URL=http://localhost:4000
- APP_CONFIG=/opt/app/config/config.yaml
frontend:
build: ./frontend
command: npm start
##volumes:
##- ./frontend:/app
##- /app/node_modules
environment:
- NODE_ENV=development
- DISABLE_ESLINT_PLUGIN=true
- REACT_APP_BACKEND_URL=http://127.0.0.1:4001/backend
- PORT=4000
- REACT_APP_PROD=0
ports:
- 4000:4000
So the most interesting point lies in backend command part. I am able to start container only with npm run start:dev command. When I enter there npm start or npm run start:prod
container executes (I see in logs that nestjs app starts, successfully connects to database) and exits without any errors. I tried node dist/main and got the same result. I tried nodemon, with nodemon dist/main nodemon, even with verbose flag shows red line something like app crashed... and gives no more information. I tried pm2 with this command pm2 --name nestjs start npm -- start pm2 successfully starts and container exits without any information.
So far I see problem lies somewhere in my configuration, but I have no clue where to seek. Thanks in advance.
I would like to put my Nodejs app into a docker. When deploying it via npm run build and start I can send requests to it.
But when creating a docker image I getting problems:
First I have an EXPOSE 8080 in my Dockerfile. Then I am running docker run -p=3000:8080 --env-file .env my-docker-file. After that I am getting the info that the server is running on http://localhost:3000.
I know localhost:3000 ist just in the docker file. But at least the docker is running.
When I use the command http localhost:3000 (or the browser) I am getting http: error: ConnectionError: ('Connection aborted.', RemoteDisconnected('Remote end closed connection without response')) while doing a GET request to URL: http://localhost:3000/.
Does someone have an idea what's going wrong??? I have no clue.
tanks to all hints that directs me into the right direction.
My Dockerfile:
## this is the stage one , also know as the build step
FROM node:12.17.0-alpine as builder
WORKDIR /app
COPY package*.json ./
COPY prisma ./prisma/
COPY tsconfig.json .
COPY src ./src/
COPY tests ./tests/
RUN npm install
RUN npx prisma generate
COPY . .
RUN npm run build
## this is stage two , where the app actually runs
FROM node:12.17.0-alpine
COPY --from=builder /app/node_modules ./node_modules
COPY --from=builder /app/package*.json ./
COPY --from=builder /app/dist ./dist
EXPOSE 8080
CMD npm start
If you use a Dockerfile, first you better to build your image.
FROM node:12.17.0-alpine as builder
WORKDIR /app
COPY . .
RUN npm install
RUN npx prisma generate
RUN npm run build
## this is stage two , where the app actually runs
FROM node:12.17.0-alpine
COPY --from=builder /app/node_modules ./node_modules
COPY --from=builder /app/package*.json ./
COPY --from=builder /app/dist ./dist
EXPOSE 8080
CMD ["npm","start"]
From the location where your Dockerfile located:
docker build -t your-image-name .
docker run -p 3000:8080 --env-file .env your-image-name
Did you check the IP address?
When i first deploy my Node project to Docker, i couldn't access it too, because my Node project was listening for localhost requests. But if you don't specify your network as host, your Docker container will have some other IP address in your subnet.
I've changed my Node projects listening IP address to 0.0.0.0 and after that i could connect to my Node project running in a Docker container.
I've create a react application with create-react-app and have build a docker image with the following docker file.
FROM node:alpine AS builder
WORKDIR /app
RUN npm install
COPY . .
RUN npm run build
FROM node:alpine
WORKDIR /app
COPY --from=builder /app/build .
RUN npm install -g serve
EXPOSE 80
CMD serve -p 80 -s build
When running the container and accessing port 80 on localhost I'm met with "404 the requested path could not be found". The container is run with the command `docker run -p 80:80 "image name" and the output is "Accepting connections at http://localhost:80" What could be the reasons for the 404 and what can i do to fix it?
Looking at the documentation of serve... You are copying /app/build from the builder container in to /app on the new container and then calling serve with a folder name of build, which does not exist. (-s doesn't take a parameter`)
I'm using AWS Elastic Beanstalk Multicontainer environment.
the problem is when using image node:0.12 or node:argon
the container start then close immediately.
node:argon "node" About a minute ago Exited (0)
after investigation we found that we must build our own image with some commands that will start the app when container initialized.
my question is:
is there any public node image that do this?
we don't want to create a private repository or build any images.
Following is a simple tutorial using argon docker image.
https://nodejs.org/en/docs/guides/nodejs-docker-webapp/
Sample docker file :
FROM node:argon
RUN mkdir -p /usr/src/app
WORKDIR /usr/src/app
COPY package.json /usr/src/app/
RUN npm install
COPY . /usr/src/app
EXPOSE 8080
CMD [ "npm", "start" ]