docker-node

List nodes in the swarm

$ docker node ls

$ docker node ps [node1 node2 node3 ...]

$ docker node inspect [node1 node2 node3 ...]

$ docker node promote [node1 node2 node3 ...]

$ docker node demote [node1 node2 node3 ...]

$ docker node rm [node1 node2 node3 ...]

$ docker node update --[availability|role|label-add|...] [active|worker|foo|...] [node1]

docker build -t .
docker run -d -p :

    Name to assign to the built Docker image.


    Port on the host machine to forward traffic to.


    Port that the Node.js application listens on within the container.

While 'docker-node' isn't a standard Linux command, it represents a common practice: using Docker to containerize and run Node.js applications. The core idea revolves around creating a Docker image based on a Node.js base image (e.g., `node:-alpine` or `node:-slim`). This image includes the Node.js runtime, your application's code, and any necessary dependencies defined in `package.json`. Dockerfiles typically use commands like `FROM`, `WORKDIR`, `COPY`, `RUN npm install`, `CMD` or `ENTRYPOINT` to construct the image. A common approach involves copying `package.json` and `package-lock.json` first, then running `npm install` or `yarn install` to leverage Docker's caching and speed up subsequent builds. The `CMD` instruction then specifies the command to start the Node.js application, such as `node server.js` or `npm start`. Running the container using `docker run` executes the Node.js app within the isolated Docker environment, ensuring consistent behavior across different systems. Docker Compose is frequently used to orchestrate Node.js applications with dependent services like databases.

Requires a Dockerfile in the current directory. Ensure your application correctly handles signals for graceful shutdown within the Docker container.

FROM node:16-alpine
WORKDIR /app
COPY package*.json ./
RUN npm install
COPY . .
EXPOSE 3000
CMD ["npm", "start"]
This Dockerfile copies your application to the /app directory, install the dependencies using npm, exposes the port 3000 and starts your app using npm start