ufo docker build

Usage

ufo docker build

Description

Build docker image.

The ufo docker build builds a Docker image using the Dockerfile in the current project folder. This simply is a wrapper command that shells out and calls the docker command. We’re use the org/repo project and it’s Dockerfile for demonstration. Example:

ufo docker build

You’ll see that it calls:

docker build -t org/repo:ufo-2017-06-11T22-18-03-a18aa30 -f Dockerfile .

You should see similar output (some of the output has been truncated for conciseness):

$ ufo docker build
Building docker image with:
  docker build -t org/repo:ufo-2017-06-11T22-18-03-a18aa30 -f Dockerfile .
Sending build context to Docker daemon 734.2 kB
Step 1 : FROM ruby:2.3.3
 ---> 0e1db669d557
Step 2 : RUN apt-get update &&   apt-get install -y     build-essential     nodejs &&   rm -rf /var/lib/apt/lists/* && apt-get clean && apt-get purge
 ---> Using cache
 ---> 931ace833716
...
Step 7 : ADD . /app
 ---> fae2452e6c35
Removing intermediate container 4c93f92a7fd8
Step 8 : RUN bundle install --system
 ---> Running in f851b9cb7d27
Using rake 12.0.0
Using i18n 0.8.1
...
Using web-console 2.3.0
Bundle complete! 12 Gemfile dependencies, 56 gems now installed.
Bundled gems are installed into /usr/local/bundle.
 ---> 194830c5c1a8
...
Removing intermediate container 67545cd4cd09
Step 11 : CMD bin/web
 ---> Running in b1b26e68d957
 ---> 8547bb48b21f
Removing intermediate container b1b26e68d957
Successfully built 8547bb48b21f
Docker image org/repo:ufo-2017-06-11T22-18-03-a18aa30 built.  Took 33s.
$

The docker image tag that is generated contains a useful timestamp and the current HEAD git sha of the project that you are on.

By default when you are running ufo docker build directly it does not push the docker image to the registry. If you would like it to automaticaly push the built image to a registry at the end of the build use the --push flag.

ufo docker build --push

You should see it being pushed at the end:

Docker image org/repo:ufo-2017-06-11T22-22-32-a18aa30 built.  Took 34s.
The push refers to a repository [docker.io/org/repo]
ef375857f165: Pushed
4d791d7cde66: Pushed
277ff31e79b4: Layer already exists
a361a4de05df: Layer already exists
ufo-2017-06-11T22-22-32-a18aa30: digest: sha256:c5385a5084e87643bd943eb120e110321c59e8acd30736ba7b5223eb1143baa8 size: 3464
Pushed org/repo:ufo-2017-06-11T22-22-32-a18aa30 docker image. Took 9s.

Note in order to push the image to a registry you will need to login into the registry. If you are using DockerHub use the docker login command. If you are using AWS ECR then you can use the aws ecr get-login command.

Docker Build Options

You can specify docker build options with the UFO_DOCKER_BUILD_OPTIONS environment variable. Example:

$ UFO_DOCKER_BUILD_OPTIONS="--build-arg RAILS_ENV=production" ufo docker build
Building docker image with:
  docker build --build-arg RAILS_ENV=production -t org/repo:ufo-2018-05-19T11-52-16-6714713 -f Dockerfile .
...
Docker image org/repo:ufo-2018-05-19T11-52-16-6714713 built.  Took 2s.

Options

[--push], [--no-push]