Docker fails to pull image ruby:2.1
It outputs this failure:
gitlab-ci-multi-runner 0.3.3 (dbaf96f)
Using Docker executor with image ruby:2.1 ...
Pulling docker image ruby:2.1 ...
Build failed with API error (500): Invalid repository name (ruby:2.1), only [a-z0-9-_.] are allowed
My config.toml contains:
concurrent = 1
[[runners]]
name = "puppet"
url = "http://ci.REMOVED.com/"
token = "771ebc502c5b32aaae0d4fea4466e2"
executor = "docker"
environment = ["MYSQL_ALLOW_EMPTY_PASSWORD=1"]
[runners.docker]
image = "ruby:2.1"
privileged = false
volumes = ["/cache"]
services = ["mysql:5.5"]