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README.md | ||
main.tf | ||
outputs.tf | ||
variables.tf | ||
versions.tf |
README.md
Cloud Function Module
Cloud Function management, with support for IAM roles and optional bucket creation.
The GCS object used for deployment uses a hash of the bundle zip contents in its name, which ensures change tracking and avoids recreating the function if the GCS object is deleted and needs recreating.
TODO
- add support for
source_repository
Examples
HTTP trigger
This deploys a Cloud Function with an HTTP endpoint, using a pre-existing GCS bucket for deployment, setting the service account to the Cloud Function default one, and delegating access control to the containing project.
module "cf-http" {
source = "./modules/cloud-function"
project_id = "my-project"
name = "test-cf-http"
bucket_name = "test-cf-bundles"
bundle_config = {
source_dir = "my-cf-source-folder"
output_path = "bundle.zip"
excludes = null
}
}
# tftest:skip
PubSub and non-HTTP triggers
Other trigger types other than HTTP are configured via the trigger_config
variable. This example shows a PubSub trigger.
module "cf-http" {
source = "./modules/cloud-function"
project_id = "my-project"
name = "test-cf-http"
bucket_name = "test-cf-bundles"
bundle_config = {
source_dir = "my-cf-source-folder"
output_path = "bundle.zip"
excludes = null
}
trigger_config = {
event = "google.pubsub.topic.publish"
resource = local.my-topic
retry = null
}
}
# tftest:skip
Controlling HTTP access
To allow anonymous access to the function, grant the roles/cloudfunctions.invoker
role to the special allUsers
identifier. Use specific identities (service accounts, groups, etc.) instead of allUsers
to only allow selective access.
module "cf-http" {
source = "./modules/cloud-function"
project_id = "my-project"
name = "test-cf-http"
bucket_name = "test-cf-bundles"
bundle_config = {
source_dir = "my-cf-source-folder"
output_path = "bundle.zip"
excludes = null
}
iam = {
"roles/cloudfunctions.invoker" = ["allUsers"]
}
}
# tftest:skip
GCS bucket creation
You can have the module auto-create the GCS bucket used for deployment via the bucket_config
variable. Setting bucket_config.location
to null
will also use the function region for GCS.
module "cf-http" {
source = "./modules/cloud-function"
project_id = "my-project"
name = "test-cf-http"
bucket_name = "test-cf-bundles"
bucket_config = {
location = null
lifecycle_delete_age = 1
}
bundle_config = {
source_dir = "my-cf-source-folder"
output_path = "bundle.zip"
excludes = null
}
}
# tftest:skip
Service account management
To use a custom service account managed by the module, set service_account_create
to true
and leave service_account
set to null
value (default).
module "cf-http" {
source = "./modules/cloud-function"
project_id = "my-project"
name = "test-cf-http"
bucket_name = "test-cf-bundles"
bundle_config = {
source_dir = "my-cf-source-folder"
output_path = "bundle.zip"
excludes = null
}
service_account_create = true
}
# tftest:skip
To use an externally managed service account, pass its email in service_account
and leave service_account_create
to false
(the default).
module "cf-http" {
source = "./modules/cloud-function"
project_id = "my-project"
name = "test-cf-http"
bucket_name = "test-cf-bundles"
bundle_config = {
source_dir = "my-cf-source-folder"
output_path = "bundle.zip"
excludes = null
}
service_account = local.service_account_email
}
# tftest:skip
Custom bundle config
In order to help prevent archive_zip.output_md5
from changing cross platform (e.g. Cloud Build vs your local development environment), you'll have to make sure that the files included in the zip are always the same.
module "cf-http" {
source = "./modules/cloud-function"
project_id = "my-project"
name = "test-cf-http"
bucket_name = "test-cf-bundles"
bundle_config = {
source_dir = "my-cf-source-folder"
output_path = "bundle.zip"
excludes = ["__pycache__"]
}
}
# tftest:skip
Variables
name | description | type | required | default |
---|---|---|---|---|
bucket_name | Name of the bucket that will be used for the function code. It will be created with prefix prepended if bucket_config is not null. | string |
✓ | |
bundle_config | Cloud function source folder and generated zip bundle paths. Output path defaults to '/tmp/bundle.zip' if null. | object({...}) |
✓ | |
name | Name used for cloud function and associated resources. | string |
✓ | |
project_id | Project id used for all resources. | string |
✓ | |
bucket_config | Enable and configure auto-created bucket. Set fields to null to use defaults. | object({...}) |
null |
|
description | Optional description. | string |
Terraform managed. |
|
environment_variables | Cloud function environment variables. | map(string) |
{} |
|
function_config | Cloud function configuration. | object({...}) |
... |
|
iam | IAM bindings for topic in {ROLE => [MEMBERS]} format. | map(list(string)) |
{} |
|
ingress_settings | Control traffic that reaches the cloud function. Allowed values are ALLOW_ALL and ALLOW_INTERNAL_ONLY. | string |
null |
|
labels | Resource labels | map(string) |
{} |
|
prefix | Optional prefix used for resource names. | string |
null |
|
region | Region used for all resources. | string |
europe-west1 |
|
service_account | Service account email. Unused if service account is auto-created. | string |
null |
|
service_account_create | Auto-create service account. | bool |
false |
|
trigger_config | Function trigger configuration. Leave null for HTTP trigger. | object({...}) |
null |
|
vpc_connector_config | VPC connector configuration. Set create_config attributes to trigger creation. |
object({...}) |
null |
Outputs
name | description | sensitive |
---|---|---|
bucket | Bucket resource (only if auto-created). | |
bucket_name | Bucket name. | |
function | Cloud function resources. | |
function_name | Cloud function name. | |
service_account | Service account resource. | |
service_account_email | Service account email. | |
service_account_iam_email | Service account email. | |
vpc_connector | VPC connector resource if created. |