Continuous Integration

• 1. Pulls files from your github repo
     1. circle.yml → tells circle what steps to take
  2. Uses docker compose to build images & spin up containers
     1. Caution, resultant image names will have specific format
        1. When using docker-compose, image naming format is <folderName><serviceName (given in docker-compose.yml)>

Image name = <gh repo name (with dashes [-]removed) >_<service name given in docker-compose.yml

• 1. Once tests pass, can push passing image to DockerHub.com

github.com/dougwells/docker-web-app

File: docker-compose.yml

version: '2'

services:

Dockerapp:

build: .

ports:

• "5000:5000"

Volumes: //Delete Volumes if deploy to cloud service

• ./app:/app //Cannot guarantee access to Volumes

//Rather-COPY in Dockerfile. Source files baked in image

redis:

image: redis:3.2.0

File: circle.yml

machine:

pre:

• curl -sSL https://s3.amazonaws.com/circle-downloads/install-circleci-docker.sh | bash -s -- 1.10.0

services:

• docker

dependencies:

pre:

• sudo pip install docker-compose

test:

override:

• docker-compose up -d

• docker-compose run dockerapp python test.py

deployment:

hub:

branch: [circle_ci_publish, master]

commands:

• docker login -e $DOCKER_HUB_EMAIL -u $DOCKER_HUB_USER_ID -p $DOCKER_HUB_PWD

• docker tag dockerwebapp_dockerapp $DOCKER_HUB_USER_ID/dockerapp:$CIRCLE_SHA1

• docker tag dockerwebapp_dockerapp $DOCKER_HUB_USER_ID/dockerapp:latest

• docker push $DOCKER_HUB_USER_ID/dockerapp:$CIRCLE_SHA1

• docker push $DOCKER_HUB_USER_ID/dockerapp:latest