Terraform Kubernetes Gitlab-Runner Module

Setup Gitlab Runner on cluster using terraform. The runner is installed via the Gitlab Runner Helm Chart

Ensure Kubernetes Provider and Helm Provider settings are correct https://registry.terraform.io/providers/hashicorp/kubernetes/latest/docs/guides/getting-started#provider-setup

Usage

module "gitlab_runner" {
  source                    = "DeimosCloud/gitlab-runner/kubernetes"
  release_name              = "${var.project_name}-runner-${var.environment}"
  runner_tags               = var.runner_tags
  runner_registration_token = var.runner_registration_token
  default_runner_image      = var.default_runner_image
  namespace                 = var.gitlab_runner_namespace

  # Pass annotations to service account. This can be for workload/pod/ identity
  service_account_annotations = {
    "iam.gke.io/gcp-service-account" = module.workload_identity["gitlab-runner"].gcp_service_account_email
  }

  # Use Local cache on Kubernetes nodes
  use_local_cache     = true

  # Mount docker socket instead of using docker-in-docker
  mount_docker_socket = true

  depends_on = [module.gke_cluster, module.gke_node_pool]
}

Custom Values

To pass in custom values use the var.values input which specifies a map of values in terraform map format or var.values_file which specifies a path containing a valid yaml values file to pass to the Chart

Contributing

Report issues/questions/feature requests on in the issues section.

Full contributing guidelines are covered here.

Requirements

Name	Version
terraform	>= 0.12
helm	>= 1.3
kubernetes	>= 1.13

Providers

Name	Version
helm	2.5.1

Modules

No modules.

Resources

Name	Type
helm_release.gitlab_runner	resource

Inputs

Name	Description	Type	Default	Required
additional_secrets	additional secrets to mount into the manager pods	list(map(string))	[]	no
atomic	whether to deploy the entire module as a unit	bool	true	no
build_dir	Path on nodes for caching	string	null	no
build_job_cpu	The CPU allocation given to and the requested for build containers	map(any)	{ "limit": "2", "request": "1" }	no
build_job_default_container_image	Default container image to use for builds when none is specified	string	"ubuntu:18.04"	no
build_job_memory	The memory allocation given to and the requested for build containers	map(any)	{ "limit": "1Gi", "request": "512Mi" }	no
build_job_mount_docker_socket	Path on nodes for caching	bool	false	no
build_job_node_selectors	A map of node selectors to apply to the pods	map	{}	no
build_job_node_tolerations	A map of node tolerations to apply to the pods as defined https://docs.gitlab.com/runner/executors/kubernetes.html#other-configtoml-settings	map	{}	no
build_job_pod_annotations	A map of annotations to be added to each build pod created by the Runner. The value of these can include environment variables for expansion. Pod annotations can be overwritten in each build.	map	{}	no
build_job_pod_labels	A map of labels to be added to each build pod created by the runner. The value of these can include environment variables for expansion.	map	{}	no
build_job_privileged	Run all containers with the privileged flag enabled. This will allow the docker:dind image to run if you need to run Docker	bool	false	no
build_job_run_container_as_user	SecurityContext: runAsUser for all running job pods	string	null	no
build_job_secret_volumes	Secret volume configuration instructs Kubernetes to use a secret that is defined in Kubernetes cluster and mount it inside of the containes as defined https://docs.gitlab.com/runner/executors/kubernetes.html#secret-volumes	object({ name = string mount_path = string read_only = string items = map(string) })	{ "items": {}, "mount_path": null, "name": null, "read_only": null }	no
cache	Describes the properties of the cache. type can be either of ['local', 'gcs', 's3', 'azure'], path defines a path to append to the bucket url, shared specifies whether the cache can be shared between runners. you also specify the individual properties of the particular cache type you select. see https://docs.gitlab.com/runner/configuration/advanced-configuration.html#the-runnerscache-section	object({ type = string path = string shared = bool gcs = map(any) s3 = map(any) azure = map(any) })	{ "azure": {}, "gcs": {}, "path": "", "s3": {}, "shared": false, "type": "local" }	no
chart_version	The version of the chart	string	"0.36.0"	no
concurrent	Configure the maximum number of concurrent jobs	number	10	no
create_namespace	(Optional) Create the namespace if it does not yet exist. Defaults to false.	bool	true	no
create_service_account	If true, the service account, it's role and rolebinding will be created, else, the service account is assumed to already be created	bool	true	no
docker_fs_group	The fsGroup to use for docker. This is added to security context when mount_docker_socket is enabled	number	412	no
gitlab_url	The GitLab Server URL (with protocol) that want to register the runner against	string	"https://gitlab.com/"	no
image_pull_secrets	A array of secrets that are used to authenticate Docker image pulling.	list(string)	[]	no
local_cache_dir	Path on nodes for caching	string	"/tmp/gitlab/cache"	no
manager_node_selectors	A map of node selectors to apply to the pods	map	{}	no
manager_node_tolerations	A map of node tolerations to apply to the pods as defined https://docs.gitlab.com/runner/executors/kubernetes.html#other-configtoml-settings	map	{}	no
manager_pod_annotations	A map of annotations to be added to each build pod created by the Runner. The value of these can include environment variables for expansion. Pod annotations can be overwritten in each build.	map	{}	no
manager_pod_labels	A map of labels to be added to each build pod created by the runner. The value of these can include environment variables for expansion.	map	{}	no
namespace	n/a	string	"gitlab-runner"	no
release_name	The helm release name	string	"gitlab-runner"	no
replicas	the number of manager pods to create	number	1	no
run_untagged_jobs	Specify if jobs without tags should be run. https://docs.gitlab.com/ce/ci/runners/#runner-is-allowed-to-run-untagged-jobs	bool	false	no
runner_image	The docker gitlab runner version. https://hub.docker.com/r/gitlab/gitlab-runner/tags/	string	null	no
runner_locked	Specify whether the runner should be locked to a specific project/group	string	true	no
runner_name	name of the runner	string	n/a	yes
runner_registration_token	runner registration token	string	n/a	yes
runner_tags	Specify the tags associated with the runner. Comma-separated list of tags.	string	n/a	yes
runner_token	token of already registered runer. to use this var.runner_registration_token must be set to null	string	null	no
service_account	The name of the Service account to create	string	"gitlab-runner"	no
service_account_annotations	The annotations to add to the service account	map	{}	no
service_account_clusterwide_access	Run the gitlab-bastion container with the ability to deploy/manage containers of jobs cluster-wide or only within namespace	bool	false	no
unregister_runners	whether runners should be unregistered when pool is deprovisioned	bool	true	no
values	Additional values to be passed to the gitlab-runner helm chart	map	{}	no
values_file	Path to Values file to be passed to gitlab-runner helm chart	string	null	no

Outputs

Name	Description
chart_version	The chart version
namespace	The namespace gitlab-runner was deployed in
release_name	The helm release name