Let’s Chat example

Create Docker images for Node/Express.js applications

Let’s Chat is self-hosted chat app for small to big teams. This tutorial will walk you through the process of adding the following:

• Build step - that will build docker image for your let’s chat app
• Push to registry step - that will push your image to docker hub
• Unit Test step - A freestyle step that runs the unit test of the demo chat after the build
• Composition step - This step will run a composition which use your chat image from the build step, docker image of curl and check if your application is responsive. It will do so by printing “works” if a curl command to our app at port 5000 succeed.

Looking around

In the root of this repository you’ll find a file named codefresh.yml, this is our build descriptor and it describes the different steps that comprise our process. Let’s quickly review the contents of this file:

codefresh.yml

version: '1.0'
steps:

  build_step:
    type: build
    dockerfile: Dockerfile
    image-name: codefreshdemo/lets-chat
    tag: ${{CF_BRANCH}}

  unit_tests:
    image: ${{build_step}}
    fail-fast: false
    commands:
      - npm install
      - gulp test

  integration_step:
    type: composition
    composition:
      version: '2'
      services:
        app:
          image: ${{build_step}}
          links:
            - mongo
          ports:
            - 5000
        mongo:
          image: mongo
    composition-candidates:
      main:
        image: nhoag/curl
        command: bash -c "sleep 30 && curl http://app:5000/" | echo 'works'