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Terraform Provider for PagerDuty

PagerDuty is an alarm aggregation and dispatching service for system administrators and support teams. It collects alerts from your monitoring tools, gives you an overall view of all of your monitoring alarms, and alerts an on duty engineer if there’s a problem. The Terraform Pagerduty provider is a plugin for Terraform that allows for the management of PagerDuty resources using HCL (HashiCorp Configuration Language).

Requirements

  • Terraform 0.12.x
  • Go 1.20 (to build the provider plugin)

Building the Provider

Clone repository to: $GOPATH/src/github.com/PagerDuty/terraform-provider-pagerduty

$ mkdir -p $GOPATH/src/github.com/PagerDuty; cd $GOPATH/src/github.com/PagerDuty
$ git clone [email protected]:PagerDuty/terraform-provider-pagerduty

Enter the provider directory and build the provider

$ cd $GOPATH/src/github.com/PagerDuty/terraform-provider-pagerduty
$ make build
...
$ $GOPATH/bin/terraform-provider-pagerduty
...

This will build the provider and put the provider binary in the $GOPATH/bin directory.

Usage

Please refer to Terraform docs for PagerDuty Provider for examples on how to use the provider and detailed documentation about the Resources and Data Sources the provider has.

Caching Support

The go-pagerduty library relies on various APIs to interact with PagerDuty's resources. However, some of these APIs lack efficient ways to query specific resources by their attributes. When an implementation in the Terraform Provider requires such logic, the library lists all resources of a specific entity and performs a lookup in memory. This can result in inefficient use of the APIs, especially when dealing with a large number of resources, as the repetitive API calls for listing resource definitions can lead to significant time consumption and performance penalties. To address this issue, we have introduced caching to improve the user experience when interacting with Terraform resources that rely on API calls to list all available data for a specific entity, and then perform a lookup by attribute value in memory. With this improvement, the Terraform Provider users can expect better performance and faster response times when working with PagerDuty's resources.

Resources currently supporting cache of API calls

  • pagerduty_team_membership
  • pagerduty_user_contact_method
  • pagerduty_user_notification_rule
  • pagerduty_user

Caching mechanisms available

  • In memory.
  • MongoDB.

To activate caching support

Environment Variable Example Value Description
TF_PAGERDUTY_CACHE memory Activate In Memory cache.
TF_PAGERDUTY_CACHE mongodb+srv://[mongouser]:[mongopass]@[mongodbname].[mongosubdomain].mongodb.net Activate MongoDB cache.
TF_PAGERDUTY_CACHE_MAX_AGE 30s Only applicable for MongoDB cache. Time in seconds for cached data to become staled. Default value 10s.
TF_PAGERDUTY_CACHE_PREFILL 1 Only applicable for MongoDB cache. Indicates to pre-fill data in cache for Abilities, Users, Contact Methods and Notification Rules.

Development

Setup Local Environment

Before developing the provider, ensure that you have go correctly installed.

  • Install Go on your machine (version 1.11+ is required).
  • Correctly setup a GOPATH, as well as adding $GOPATH/bin to your $PATH.

Setup Local PagerDuty Provider

Make changes to the PagerDuty provider and post a pull request for review.

  1. Create a fork of the upstream repository https://github.com/PagerDuty/terraform-provider-pagerduty
  2. Clone the new origin repository to your local go src path: $GOPATH/src/github.com/<your-github-username>/terraform-provider-pagerduty
  3. optionally make development easier by setting the upstream repository 
    $ git remote add upstream [email protected]:PagerDuty/terraform-provider-pagerduty.git
  4. Make any changes on your local machine and post a PR to the upstream repository

Run Dev Build with Local Terraform Module

Note: Development overrides work only in Terraform v0.14 and later. Using a dev_overrides block in your CLI configuration will cause Terraform v0.13 to reject the configuration as invalid.

  1. Build the provider with your latest changes. (See Building the Provider)
  2. Override the pagerduty provider with your local build. (See Development Overrides for Provider Developers)
    • Create the file $HOME/.terraformrc and paste the following content into it. Be sure to change the path to wherever your binary is located. It is currently set to the default for go builds.
    provider_installation {
   dev_overrides {
      "pagerduty/pagerduty" = "/<ABSOLUTE_PATH_TO>/<YOUR_HOME_PATH>/go/bin"
   }
   direct {}
}
  3. Goto a local terraform module and start running terraform. (See Using the Provider). You may need to first install the latest module and provider versions allowed within the new configured constraints. Verify with the below warning message. 
    $ terraform init -upgrade
$ terraform plan
...
│ Warning: Provider development overrides are in effect
  4. See api_url_override from Terraform docs for PagerDuty Provider to set a custom proxy endpoint as PagerDuty client api url overriding service_region setup.

Test a specific version of the go-pagerduty API client

Modify the go.mod file using a Go module replacement for `github.com/heimweh/go-pagerduty:

$ go mod edit -replace github.com/heimweh/go-pagerduty=/PATH/TO/LOCAL/github.com/<USERNAME>/<REPO>

Or update the file directly:

replace github.com/heimweh/go-pagerduty => /PATH/TO/LOCAL/go-pagerduty

Update vendored dependencies or configure compiler to prefer using downloaded modules based on go.mod file:

$ export GOFLAGS="-mod=mod"

Or:

$ go mod vendor

Setup Local Logs

  1. See Debugging Terraform. Either add this to your shell's profile (example: ~/.bashrc), or just execute these commands: 
    export TF_LOG=trace
export TF_LOG_PATH="/PATH/TO/YOUR/LOG_FILE.log"
  2. stream logs 
    $ tail -f /PATH/TO/YOUR/LOG_FILE.log

Secure Logs Level

In addition to the log levels provided by Terraform, namely TRACE, DEBUG, INFO, WARN, and ERROR (in descending order of verbosity), the PagerDuty Provider introduces an extra level called SECURE. This level offers verbosity similar to Terraform's debug logging level, specifically for the output of API calls and HTTP request/response logs. The key difference is that API keys within the request's Authorization header will be obfuscated, revealing only the last four characters. An example is provided below:

---[ REQUEST ]---------------------------------------
GET /teams/DER8RFS HTTP/1.1
Accept: application/vnd.pagerduty+json;version=2
Authorization: <OBSCURED>kCjQ
Content-Type: application/json
User-Agent: (darwin arm64) Terraform/1.5.1

To enable the SECURE log level, you must set two environment variables:

  • TF_LOG=INFO
  • TF_LOG_PROVIDER_PAGERDUTY=SECURE

Testing

In order to test the provider, you can simply run make test.

$ make test

In order to run the full suite of Acceptance tests, run make testacc. Running the acceptance tests requires that the PAGERDUTY_TOKEN environment variable be set to a valid API Token and that the PAGERDUTY_USER_TOKEN environment variable be set to a valid API User Token. Many tests also require that the Email Domain Restriction feature either be disabled or be configured to include foo.test as an allowed domain.

Note: Acceptance tests create real resources, and often cost money to run.

$ make testacc

Additional Note: In order for the tests on the Slack Connection resources to pass you will need valid Slack workspace and channel IDs from a Slack workspace connected to your PagerDuty account.

Run a specific subset of tests by name use the TESTARGS="-run TestName" option which will run all test functions with "TestName" in their name.

$ make testacc TESTARGS="-run TestAccPagerDutyTeam"

Some tests require additional environment variables to be set to enable them due to account restrictions on certain features. Similarly to TF_ACC, the value of the environment variable is not relevant.

For example:

PAGERDUTY_ACC_INCIDENT_WORKFLOWS=1 make testacc TESTARGS="-run PagerDutyIncidentWorkflow"
PAGERDUTY_ACC_SERVICE_INTEGRATION_GENERIC_EMAIL_NO_FILTERS="user@<your_domain>.pagerduty.com" make testacc TESTARGS="-run PagerDutyServiceIntegration_GenericEmailNoFilters"
PAGERDUTY_ACC_INCIDENT_CUSTOM_FIELDS=1 make testacc TESTARGS="-run PagerDutyIncidentCustomField"
PAGERDUTY_ACC_LICENSE_NAME="Full User" make testacc TESTARGS="-run DataSourcePagerDutyLicense_Basic"
PAGERDUTY_ACC_SCHEDULE_USED_BY_EP_W_1_LAYER=1 make testacc TESTARGS="-run PagerDutyScheduleWithTeams_EscalationPolicyDependantWithOneLayer"
Variable Name Feature Set
PAGERDUTY_ACC_INCIDENT_WORKFLOWS Incident Workflows
PAGERDUTY_ACC_SERVICE_INTEGRATION_GENERIC_EMAIL_NO_FILTERS Service Integration
PAGERDUTY_ACC_INCIDENT_CUSTOM_FIELDS Custom Fields
PAGERDUTY_ACC_LICENSE_NAME Licenses
PAGERDUTY_ACC_SCHEDULE_USED_BY_EP_W_1_LAYER Schedule
PAGERDUTY_ACC_EXTERNAL_PROVIDER_VERSION Modifies the version used to compare plans between sdkv2 and framework implementations. Default ~> 3.6.