The image built in the previous step is referenced as the final argument to the docker run command. The on-failure setting means Docker will automatically restart the container if it exits with a failure code because your application crashed. -restart – Selects the restart policy to apply to the container.-name – Assigns the container a friendly name which you can use to reference it in other Docker CLI commands.You can change the host post to a different value by modifying the first part of the bind definition, such as 8100:8080 to access your container on localhost:8100. This means traffic to localhost:8080 will be passed through to the corresponding container port. -p – Binds port 8080 on your host to port 8080 inside the container (which our Express sample app was configured to listen on).-d – Detaches your shell from the container’s foreground process, effectively running it as a background server.This increases efficiency and reduces the time spent preparing the build. Specifically excluding the node_modules already present in your working directory saves having to copy all those files into Docker’s temporary build context location. In the case of node_modules, this directory’s content is irrelevant to the build as we’re installing the dependencies anew via the RUN npm ci instruction. You won’t be able to reference them inside your Dockerfile. This file defines paths in your working directory that will not be included in the build context. Give the file the following content: node_modules/ dockerignore file to the root of your project. One way to improve build performance is to add a. This determines the paths that can be referenced by the COPY instructions in your Dockerfile. (period) specifies your working directory as the image build context. ĭocker will take the Dockerfile in your working directory, run the instructions within it, and tag the resulting image as node-app:latest. Next you need to build your image: docker build -t node-app:latest. ![]() The CMD is appended to the inherited entrypoint, resulting in node app.js being run as the foreground process for your new image. This works because the Node.js base image is configured to use the node process as its entrypoint. The final Dockerfile stage uses the CMD instruction to run your app automatically when the container starts.
0 Comments
Leave a Reply. |