Install Gitlab runner on Openshift

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In this post I will configure a gtlab rubber for Openshift.

Creating a Service Account

oc new-project gitlab-rubber
oc create sa gitlab-ci
oc policy add-role-to-user edit system:serviceaccount:gitlab-rubber:gitlab-ci

oc get sa
NAME         SECRETS   AGE
builder      2         2d
default      2         2d
deployer     2         2d
gitlab-ci    2         2d

oc describe sa gitlab-ci
Name:           gitlab-ci
Namespace:      constellation
Labels:         <none>
Annotations:    <none>

Image pull secrets:     gitlab-ci-dockercfg-q5mj9

Mountable secrets:      gitlab-ci-token-gvvkv
                        gitlab-ci-dockercfg-q5mj9

Tokens:                 gitlab-ci-token-gvvkv
                        gitlab-ci-token-tfsf7

oc describe secret gitlab-ci-token-gvvkv
...
token:          eyJ...<very-long-token>...-cw

oc login --token=eyJ...<very-long-token>...-cw

Edit Gitlab-ci config

nano  .gitlab-ci.yml
image: ebits/openshift-client

stages:
  - deployToOpenShift

variables:
  OPENSHIFT_SERVER: https://master.openshift.mydomain.intra:443
  OPENSHIFT_DOMAIN: openshift.mydomain.intra
  # Configure this variable in Secure Variables:
  OPENSHIFT_TOKEN: eyJ...<very-long-token>...-cw

.deploy: &deploy
  before_script:
    - oc login "$OPENSHIFT_SERVER" --token="$OPENSHIFT_TOKEN" --insecure-skip-tls-verify
  # login with the service account
    - oc project "slides-openshift"
  # enter into our slides project on OpenShift
  script:
    - "oc get services $APP 2> /dev/null || oc new-app . --name=$APP"
  # create a new application from the image in the OpenShift registry
    - "oc start-build $APP --from-dir=. --follow || sleep 3s"
  # start a new build
    - "oc get routes $APP 2> /dev/null || oc expose service $APP --hostname=$APP_HOST"
  # expose our application

develop:
  <<: *deploy
  stage: deployToOpenShift
  tags:
    - docker
  variables:
    APP: slides-openshift
    APP_HOST: demo-slides.$OPENSHIFT_DOMAIN
  environment:
    name: develop
    url: http://demo-slides.$OPENSHIFT_DOMAIN
  except:
    - master

Create a kubernetes runner in Openshift from template:

wget https://raw.githubusercontent.com/devopstales/openshift-examples/master/template/gitlab-runner-template.yml
oc deploy gitlab-runner-template.yml

Deploy the template from the gui:

oc adm policy add-scc-to-user privileged system:serviceaccount:gitlab-rubber:<application-name>-user
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