Use the Terraform plugin to apply the infrastructure configuration contained within the repository. The following parameters are used to configure this plugin: * `plan` - if true, calculates a plan but does __NOT__ apply it. * `remote` - contains the configuration for the Terraform remote state tracking. * `backend` - the Terraform remote state backend to use. * `config` - a map of configuration parameters for the remote state backend. Each value is passed as a `-backend-config==` option. * `vars` - a map of variables to pass to the Terraform `plan` and `apply` commands. Each value is passed as a `-var =` option. * `ca_cert` - ca cert to add to your environment to allow terraform to use internal/private resources * `sensitive` (default: `false`) - Whether or not to suppress terraform commands to stdout. * `role_arn_to_assume` - A role to assume before running the terraform commands. * `root_dir` - The root directory where the terraform files live. When unset, the top level directory will be assumed. * `parallelism` - The number of concurrent operations as Terraform walks its graph. The following is a sample Terraform configuration in your .drone.yml file: ```yaml deploy: terraform: plan: false remote: backend: S3 config: bucket: my-terraform-config-bucket key: tf-states/my-project region: us-east-1 vars: app_name: my-project app_version: 1.0.0 ``` # Advanced Configuration ## CA Certs You may want to run terraform against internal resources, like an internal OpenStack deployment. Usually these resources are signed by an internal CA Certificate. You can inject your CA Certificate into the plugin by using `ca_certs` key as described above. Below is an example. ```yaml deploy: terraform: plan: false remote: backend: swift config: path: drone/terraform vars: app_name: my-project app_version: 1.0.0 ca_cert: | -----BEGIN CERTIFICATE----- asdfsadf asdfsadf -----END CERTIFICATE----- ``` ## Suppress Sensitive Output You may be passing sensitive vars to your terraform commands. If you do not want the terraform commands to display in your drone logs then set `sensitive` to `true`. The output from the commands themselves will still display, it just won't show want command is actually being ran. ```yaml deploy: terraform: plan: false sensitive: true remote: backend: S3 config: bucket: my-terraform-config-bucket key: tf-states/my-project region: us-east-1 vars: app_name: my-project app_version: 1.0.0 ``` ## Assume Role ARN You may want to assume another role before running the terraform commands. This is useful for cross account access, where a central account ahs privileges to assume roles in other accounts. Using the current credentials, this role will be assumed and exported to environment variables. See [the discussion](https://github.com/hashicorp/terraform/issues/1275) in the Terraform issues. ```yaml deploy: terraform: plan: false remote: backend: S3 config: bucket: my-terraform-config-bucket key: tf-states/my-project region: us-east-1 vars: app_name: my-project app_version: 1.0.0 role_arn_to_assume: arn:aws:iam::account-of-role-to-assume:role/name-of-role ``` ## Root dir You may want to change directories before applying the terraform commands. This parameter is useful if you have multiple environments in different folders and you want to use different drone configurations to apply different environments. ```yaml deploy: terraform: plan: false remote: backend: S3 config: bucket: my-terraform-config-bucket key: tf-states/my-project region: us-east-1 vars: app_name: my-project app_version: 1.0.0 root_dir: some/path/here ``` ## Parallelism You may want to limit the number of concurrent operations as Terraform walks its graph. If you want to change Terraform's default parallelism (currently equal to 10) then set the `parallelism` parameter. ```yaml deploy: terraform: plan: false remote: backend: S3 config: bucket: my-terraform-config-bucket key: tf-states/my-project region: us-east-1 vars: app_name: my-project app_version: 1.0.0 parallelism: 2 ```