GitLab CI invalid argument on job for Docker build

问题

So I'm trying to setup my Gitlab CI to trigger a job on git push to build and deploy my Docker. This is the .gitlab-ci.yml file I'm using based on an example from Gitlab docs (Elixir yml).

stages:
  - build

build:
  before_script:
    - docker build -f Dockerfile.build -t ci-project-build-$CI_PROJECT_ID:$CI_BUILD_REF .
    - docker create
      -v /build/deps 
      -v /build/_build
      -v /build/rel
      -v /root/.cache/aceapp/
      --name build_data_$CI_PROJECT_ID_$CI_BUILD_REF busybox /bin/true
  tags:
    - docker
  stage: build
  script: 
    - docker run --volumes-from build_data_$CI_PROJECT_ID_$CI_BUILD_REF --rm -t ci-project-build-$CI_PROJECT_ID:$CI_BUILD_REF

The output when pushing to GitLab instance is this:

Running with gitlab-runner 10.7.2 (b5e03c94)
on my.host.rhel.runner 8f724ea7
Using Shell executor...
Running on my.host.local...
Fetching changes...
HEAD is now at 14351c4 Merge branch 'Development' into 'master'
From https://my.host.example/zalmosc/ace-app
   14351c4..9fa2d43  master     -> origin/master
Checking out 9fa2d435 as master...
Skipping Git submodules setup
$ # Auto DevOps variables and functions # collapsed multi-line command
$ setup_docker
$ build
Logging to GitLab Container Registry with CI credentials...
Login Succeeded

Building Dockerfile-based application...
invalid argument "/master:9fa2d4358e6c426b882e2251aa5a49880013614b" for t: Error parsing reference: "/master:9fa2d4358e6c426b882e2251aa5a49880013614b" is not a valid repository/tag: invalid reference format
See 'docker build --help'.
ERROR: Job failed: exit status 1

I understand the docker tag is not valid (is the before_script: really triggered based on the name?), and I'm looking for help regarding a) a solution b) how I can learn more about the requirements for a pipeline that builds docker based on default settings. Do I need to tag my docker image locally and then somehow add this to my git commit?

回答1:

The thing is -t is to tag your Docker image. See the docs here.

The tag should be formated like name:version, and you giving it /master:9fa2d4358e6c426b882e2251aa5a49880013614b which is not a valid tag. You could try to delete the / before master

回答2:

Your tag cannot begin with '/':

$ docker build -f Dockerfile.build -t /master:9fa2d4358e6c426b882e2251aa5a49880013614b .
invalid argument "/master:9fa2d4358e6c426b882e2251aa5a49880013614b" for "-t, --tag" flag: invalid reference format
See 'docker build --help'.

# remove '/'
$ docker build -f Dockerfile.build -t master:9fa2d4358e6c426b882e2251aa5a49880013614b .
Sending build context to Docker daemon  3.584kB
Step 1/3 : FROM ubuntu:16.04
---> 14f60031763d
...

回答3:

If you are not using the built in registry, you might have to set the CI_REGISTRY_IMAGE value to something. It seems that if you don't se this it gets set to /master and causes this error. you can set this in the CI setting page, or when making a new pipeline. e.g CI_REGISTRY_IMAGE gitlab.com/user/project

来源：https://stackoverflow.com/questions/50486026/gitlab-ci-invalid-argument-on-job-for-docker-build

标签

Docker

gitlab

gitlab-ci-runner