Docker Node Install



In the Dockerfile introduction post I introduced a simple Node.js Dockerfile example: FROM node:14 WORKDIR /usr/src/app COPY package.json app.js./ RUN npm install EXPOSE 3000 CMD 'node', 'app.js' NOTE: use double quotes in the CMD line. For Rancher v2.5+, the Rancher backup operator can be used to migrate Rancher from the single Docker container install to an installation on a high-availability Kubernetes cluster. For details, refer to the documentation on migrating Rancher to a new cluster. In this article, we will show you how to install Docker CE (Community Edition), create and run Docker containers on Ubuntu distribution. Installing Docker CE (Community Edition) in Ubuntu. To install Docker CE, first, you need to remove older versions of Docker were called docker, docker.io, or docker-engine from the system using the. This sample Docker Compose file brings up a three-node Elasticsearch cluster. Node es01 listens on localhost:9200 and es02 and es03 talk to es01 over a Docker network. Please note that this configuration exposes port 9200 on all network interfaces, and given how Docker manipulates iptables on Linux, this means that your Elasticsearch cluster is publically accessible, potentially ignoring any.

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In the earlier chapters, we have seen the various Image files such as Centos which get downloaded from Docker hub from which you can spin up containers. An example is again shown below.

If we use the Docker images command, we can see the existing images in our system. From the above screenshot, we can see that there are two images: centos and nsenter.

But Docker also gives you the capability to create your own Docker images, and it can be done with the help of Docker Files. A Docker File is a simple text file with instructions on how to build your images.

Docker node install packageDocker node install chromeInstall node in docker

The following steps explain how you should go about creating a Docker File.

Step 1 − Create a file called Docker File and edit it using vim. Please note that the name of the file has to be 'Dockerfile' with 'D' as capital.

Docker installing nodeDocker

Step 2 − Build your Docker File using the following instructions.

The following points need to be noted about the above file −

  • The first line '#This is a sample Image' is a comment. You can add comments to the Docker File with the help of the # command

  • The next line has to start with the FROM keyword. It tells docker, from which base image you want to base your image from. In our example, we are creating an image from the ubuntu image.

  • The next command is the person who is going to maintain this image. Here you specify the MAINTAINER keyword and just mention the email ID.

  • The RUN command is used to run instructions against the image. In our case, we first update our Ubuntu system and then install the nginx server on our ubuntu image.

  • The last command is used to display a message to the user.

Docker Install Node Js

Step 3 − Save the file. In the next chapter, we will discuss how to build the image.