I am run a single Node.js script like so: docker run -it --rm -u node --name build_container -v $(pwd):/home/node/app -w "/home/node/app" node:lts bash -c "yarn install --no-cache --frozen-lockfile".
However, the script log shows the displays info No lockfile found, and, what is even weirder, a message that says a package-lock.json was found. However, the work directory has no package-lock.
Are there any ideas what could be the issue?
I would suggest using your own Dockerfile to build your image - and then run it inside the build - like so:
Dockerfile
FROM node:12-alpine
# Create work directory
RUN mkdir -p /express
WORKDIR /express
# Bundle app sources
COPY . .
# Build app
RUN yarn install --prod --frozen-lockfile && yarn run build
EXPOSE 3000
# Set default NODE_ENV to production
ENV NODE_ENV production
ENTRYPOINT [ "yarn", "start" ]
.dockerignore
node_modules
build
dist
config
docs
*.log
.git
.vscode
And then build the image:
docker build -t <your image name> -f <Dockerfile (if omitted uses local folder .Dockerfile> <path to code your code>
Once built, run it as you would a normal image - as everything is already in.
Related
I am building a Node.JS application using Postgres as the database. I am using Docker/Docker compose for the development environment. I could dockerise my environment. However there is one issue remain which is the project is not refreshing or showing the latest changes using Nodemon. Basically it is not detecting the code changes.
I have a docker-compose.yaml file with the following code.
version: '3.8'
services:
web:
container_name: web-server
build: .
ports:
- 4000:4000
restart: always
This is my Dockerfile.
FROM node:14-alpine
RUN apk update && apk upgrade
RUN apk add nodejs
RUN rm -rf /var/cache/apk/*
COPY . /
RUN cd /; npm install;
RUN npm install -g nodemon
EXPOSE 4000
CMD ["npm", "run", "docker-dev"]
This is my docker-dev script in package.json file
"docker-dev": "nodemon -L --inspect=0.0.0.0 index.js"
When I spin up the environment running docker-compose up -d and go to the localhost:4000 on the browser, I can see my application up and running there. But when I make the changes to the code and refresh the page, the new changes are not there. It seems like Nodemon is not working. I had to remove Docker images and spin up the environment again to see the latest changes.
How can I fix it?
During development, I often use a raw node image and run it like this
docker run --rm -d -v $(pwd):/app --workdir /app -u $(id -u):$(id -g) -p 3000:3000 --entrypoint /bin/bash node -c "npm install && npm start"
The different parts of the command do the following
--rm remove the container when it exits
-d run detached
-v $(pwd):/app map the current directory to /app in the container
--workdir /app set the working directory in the container to /app
-u $(id -u):$(id -g) run the container with my UID and GID so any files created in the host directory will be owned by me
-p 3000:3000 map port 3000 to the host
--entrypoint /bin/bash set the entrypoint to bash
node run the official node image
-c "npm install && npm start" on container start, install npm packages and start the app
You can do something similar. If we replace a few things, this should match your project
docker run --rm -d -v $(pwd):/app --workdir /app -u $(id -u):$(id -g) -p 4000:4000 --entrypoint /bin/sh node:14-alpine -c "npm install && npm install -g nodemon && npm run docker-dev"
I've changed the entrypoint because Alpine doesn't have bash installed. The image is node:14-alpine. The port is 4000. And on start, you want it to install nodemon and run the docker-dev script.
I put the command in a shell script so I don't have to type it all out every time.
You are doing your changes in your local file system and not in the docker container file system.
You need to use a volume of you want to see your changes reflecting real time.
I have a React client and Go server app that I am trying to containerize. This is my first time using Docker so I'm having a hard time getting it to work. My Dockerfile looks like this which I got from this guide
# Build the Go API-
FROM golang:latest AS builder
ADD . /app
WORKDIR /app/server
RUN go mod download
RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags "-w" -a -o /main .
# Build the React application
FROM node:alpine AS node_builder
COPY --from=builder /app/client ./
RUN npm install
RUN npm run build
# Final stage build, this will be the container
# that we will deploy to production
FROM alpine:latest
RUN apk --no-cache add ca-certificates
COPY --from=builder /main ./
COPY --from=node_builder /build ./web
RUN chmod +x ./main
EXPOSE 8080
CMD ./main
My server code take in the PORT environment variable to set which port to listen to so I used the following Docker run command:
docker run -p 3000:8080 --env PORT=8080 test1. However, when I go to localhost:3000, I get a 404 page not found response instead of my React app. I've tried several different combinations of the run command but I can't seem to figure out how to get my UI to appear. Is this something to do with my Dockerfile or is my run command missing parameters? Or both?
I have a static website built with gridsome, I'm experimenting with docker containerization and I came up with the following Dockerfile:
FROM node:14.2.0-alpine3.10
RUN apk update && apk upgrade
RUN apk --no-cache add git g++ gcc libgcc libstdc++ linux-headers make python yarn
ENV NPM_CONFIG_PREFIX=/home/node/.npm-global
USER node
RUN npm i --global gridsome
RUN yarn global add serve
COPY --chown=node:node gridsome-website/ /home/node/build/
RUN echo && ls /home/node/build/ && echo
WORKDIR /home/node/build
USER node
RUN npm cache clean --force
RUN npm clean-install
# My attempt to serve the website from within, build is successful but serve command doesn't work
CMD ~/.npm-global/bin/gridsome build && serve -d dist/
Gridsome uses the port 8080 by default, after running the container via:
docker run --name my-website -d my-website-image
It doesn't fail, but I can't access my website using the link: http://localhost:8080, the container stops execution right after I run it. I tried copying the ``` dist/`` folder from my container via:
$ docker cp my-website:/home/node/build/dist ./dist
then serving it manually from terminal using:
$ serve -d dist/
It works from terminal, but why does it fail from within the container?
The point of Gridsome is that it produces a static site that you can host anywhere you can put files, right? You don't need nodejs or anything except for a simple webserver to host it.
If you want to produce a clean production Docker image to serve the static files built by Gridsome, then that's a good use-case for a multistage Dockerfile. In the first stage you build your Gridsome project. In the second and final stage you can go with a clean nginx image that contains your dist folder and nothing else.
It could be as simple as this:
FROM node:current AS builder
WORKDIR /build
COPY gridsome-website ./
RUN npm install && gridsome build
FROM nginx:stable
COPY --from=builder /build/dist /usr/share/nginx/html/
EXPOSE 80
After you build and run the image with 8080->80 port mapping, you can access your site at http://127.0.0.1:8080.
docker build -t my-website-image .
docker run -p 8080:80 my-website-image
It's probably a good idea to set up a .dockerignore file as well that ignores at least node_modules.
$ cat .dockerignore
gridsome-website/node_modules
I am having a problem running Docker container after upgrading from NodeJS 8.2 to 9.1. This is the message I am getting.
I used the Dockerfile I found in Docker Hub but got an error of not being able to find package.json. So I commented it out and use the one I found on NodeJS website.
Below is the Docker File:
Dockerfile
FROM node:9.1.0
RUN mkdir -p /usr/src/app
WORKDIR /usr/src/app
ONBUILD ARG NODE_ENV
ONBUILD ENV NODE_ENV $NODE_ENV
ONBUILD COPY package*.json ./
ONBUILD RUN npm install && npm cache clean --force
ONBUILD COPY . /usr/src/app
CMD [ "npm", "start" ]
I would appreciate help from more experienced users.
Your docker run command syntax is wrong. Everything after the image name is used to override the command run in your container. So docker run myimage -d will try to run -d inside the container, while docker run -d myimage will run your container with the -d option to docker run (detached mode).
The Dockerfile you referenced is meant to be used as parent image for an easy dockerization of your application.
So to dockerize your nodejs application, you'd need to create a dockerfile using the docker image created by said dockerfile.
The ONBUILD instruction gets executed whenever a new image is built with this particular image as parent image (FROM instruction). More info
I've never used an image like this, but from the looks of it, it should be enough to reference the image with the FROM instruction and then provide the NODE_ENV via build args.
The dockerfile to add into your project:
FROM this_image:9.1
How to build your application image:
docker build -t IMAGE_NAME:TAG --build-arg NODE_ENV=production .
I am using Docker with Docker Compose and these are my files:
#DOCKERFILE
FROM mhart/alpine-node
# Create app directory
RUN mkdir -p /home/app
# Bundle app soure
COPY . /home/app
# From now on we work in /home/app
WORKDIR /home/app
# Install yarn and node modules
RUN echo -e 'http://dl-cdn.alpinelinux.org/alpine/edge/main\nhttp://dl-
cdn.alpinelinux.org/alpine/edge/community\nhttp://dl-
cdn.alpinelinux.org/alpine/edge/testing' > /etc/apk/repositories \
&& apk add --no-cache yarn \
&& yarn
EXPOSE 8080
This is the docker-compose file for dev:
app:
build: .
command: yarn start:dev
environment:
NODE_ENV: development
ports:
- '8080:8080'
volumes:
- .:/home/app
- /home/app/node_modules
The problem I am having is that this setup seems to work just once because no matter which new module I add to the package.json, whenever I run docker-compose build it will not install the new package.
The reason why I am using the volumes is because nodemon would not work without .:/home/app, but if the node modules are not installed in the host then it will fail, reason why I need /home/app/node_modules. I suspect this could be the cause of my error, but I am not sure how to circumvent that.
I solved this by moving my src code inside an src directory.
This means my docker-compose.yml file now looks like this:
app:
build: .
command: yarn start:dev
environment:
NODE_ENV: development
ports:
- '8080:8080'
volumes:
- ./src:/home/app/src
Since I am not mounting the whole dir with the node_modules, new ones seem to be installed correctly.
The package.json should be copied into app directory and "npm install" should be invoked in Dockerfile before copying the bundle line.
#DOCKERFILE
FROM mhart/alpine-node
# Create app directory
RUN mkdir -p /home/app
WORKDIR /home/app
# Install app dependencies
COPY package.json /home/app
RUN npm install
# Bundle app soure
COPY . /home/app
# Install yarn and node modules
RUN echo -e 'http://dl-cdn.alpinelinux.org/alpine/edge/main\nhttp://dl-
cdn.alpinelinux.org/alpine/edge/community\nhttp://dl-
cdn.alpinelinux.org/alpine/edge/testing' > /etc/apk/repositories \
&& apk add --no-cache yarn \
&& yarn
EXPOSE 8080
If there is any new dependency registers in package.json, it should be installed when the docker build command is invoked.