Troubleshooting Docker and Kubernetes Containers/

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Handling Library and Package Errors in Dockerfile

Handling Library and Package Errors in Dockerfile

Understand how to troubleshoot image build issues in a Dockerfile.

We'll cover the following...

Overview of package and library installation issues in Dockerfile

There are scenarios where we try to install some services and get package or library issues. The reasons can include not installing the necessary package for our application properly or not implementing it properly. In most cases, these packages or libraries are needed for the proper running of our application. We’ll be examining, troubleshooting, and resolving some library and package challenges regarding the Docker image build in a Dockerfile below.

Node.js application using Gatsby config

Our first case study is a Node.js application, which makes use of the gatsby-config.js file. The Dockerfile and the package.json file are all below to practice with.

  • The Dockerfile:

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FROM node:13
WORKDIR /app
COPY package.json .
RUN yarn global add gatsby-cli
RUN yarn install
COPY gatsby-config.js .
COPY .env .
EXPOSE 8000
CMD ["gatsby","develop","-H","0.0.0.0"]

  • The package.json file:

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{
  "name": "my-gatsby-app",
  "version": "1.0.0",
  "description": "Gatsby application",
  "scripts": {
    "develop": "gatsby develop",
    "build": "gatsby build"
  },
  "dependencies": {
    "gatsby": "^3.14.1",
    "react": "^17.0.2",
    "react-dom": "^17.0.2"
  },
  "devDependencies": {
    "gatsby-plugin-sass": "^4.0.1"
  }
}

The gatsby-config.js file:

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module.exports = {
  siteMetadata: {
    title: "My Gatsby App",
    description: "A Gatsby application",
    author: "Our Name"
  },
  plugins: [
    {
      resolve: "gatsby-plugin-sass",
      options: {
        // Add any Sass plugin options here
      }
    }
  ]
};

We use the following command to build the Docker image (we’ll call our Docker image to be built project ...