GitLab CI doesn't support Openstack as an executor but provides the ability to implement your own executor by using scripts to provision, run, and clean up CI environment. This repository contains such scripts as well as a Containerfile to build and configure a container image with Gitlab Runner that uses custom Openstack executor.

git clone https://github.com/RedHatQE/openstack-gitlab-executor.git
cd openstack-gitlab-executor
podman build --build-arg GITLAB_RUNNER_VERSION=<version> -f Containerfile -t openstack-gitlab-runner

The container expects the following environment variables:

FLAVOR - Default instance flavor reference

BUILDER_IMAGE - Default image to use for instance provisioning

NETWORK - Default network name

KEY_PAIR_NAME - Default SSH key pair name

SECURITY_GROUP - Default security group

USERNAME - Default username for SSH connection to instances

PRIVATE_KEY - Private key content

SSH_TIMEOUT - Timeout for establishing SSH connection

RUNNER_TAG_LIST - Tag list

REGISTRATION_TOKEN - Runner's registration token

RUNNER_NAME - Runner name

CI_SERVER_URL - Runner URL

RUNNER_BUILDS_DIR - Path to builds directory on the Openstack instance

RUNNER_CACHE_DIR - Path to cache directory on the Openstack instance

CONCURRENT - Limits how many jobs can run concurrently (default 1)

OS_AUTH_URL - Openstack authentication URL

OS_PROJECT_NAME - Project-level authentication scope (name or ID)

OS_USERNAME - Authentication username

OS_PASSWORD - Authentication password

OS_PROJECT_DOMAIN_NAME - Domain name or ID containing project

OS_USER_DOMAIN_NAME - Domain name or ID containing user

OS_REGION_NAME - Authentication region name

OS_IDENTITY_API_VERSION - Identity API version

OS_INTERFACE - Interface type

Create an env file with all variables:

cat env.txt

RUNNER_TAG_LIST=<your value>
REGISTRATION_TOKEN=<your value>
RUNNER_NAME=<your value>
CI_SERVER_URL=<your value>
RUNNER_BUILDS_DIR=<your value>
RUNNER_CACHE_DIR=<your value>
CONCURRENT=<your value>

FLAVOR=<your value>
BUILDER_IMAGE=<your value>
NETWORK=<your value>
KEY_PAIR_NAME=<your value>
SECURITY_GROUP=<your value>
USERNAME=<your value>

OS_AUTH_URL=<your value>
OS_PROJECT_NAME=<your value>
OS_USERNAME=<your value>
OS_PASSWORD=<your value>
OS_PROJECT_DOMAIN_NAME=<your value>
OS_USER_DOMAIN_NAME=<your value>
OS_REGION_NAME=<your value>
OS_IDENTITY_API_VERSION=<your value>
OS_INTERFACE=<your value>

Run a container:

podman run -it \
           -e PRIVATE_KEY="$(cat <private key filename>)"
           --env-file=env.txt \
           quay.io/redhatqe/openstack-gitlab-runner:latest

You can override instance configuration defaults by providing environment variables in a GitLab CI job config. For example, if you want to use another Openstack image to provision builder instance you should provide the following:

stages:
  - build

build:
  stage: build
  variables:
    BUILDER_IMAGE: my-custom-image
  tags:
    - some-tag
  script:
    - some command