ServiceNow CI/CD GitHub Action for Rollback Installed Application

Initiate a rollback of a specified application to a specified version if installation fails.

Runs if Install Application step is failed and install_app.outputs.rollbackVersion exists.

Usage

Step 1: Prepare values for setting up your variables for Actions

• credentials (username and password for a service account)
• instance URLs for your dev, test, prod, etc. environments
• sys_id or scope for your app
• sys_id for your ATF Test Suite

Step 2: Configure Secrets in your GitHub repository

On GitHub, go in your repository settings, click on the secret Secrets and create a new secret.

Create secrets called

• NOW_USERNAME
• NOW_PASSWORD
• NOW_INSTALL_INSTANCE only the domain string is required from the instance URL, for example https://domain.service-now.com
• APP_SYS_ID or APP_SCOPE

Step 3: Example Workflow Template

https://github.com/ServiceNow/sncicd_githubworkflow

Step 4: Configure the GitHub Action if need to adapt for your needs or workflows

- name: Rollback Application 
  if: ${{ failure() && steps.install_app.outputs.rollbackVersion }}
  uses: ServiceNow/sncicd-rollback-app@1.0 # like username/repo-name
  with:
    version: ${{steps.install_app.outputs.rollbackVersion}}
  env:
    nowUsername: ${{ secrets.NOW_USERNAME }}
    nowPassword: ${{ secrets.NOW_PASSWORD }}
    nowInstallInstance: ${{ secrets.NOW_INSTALL_INSTANCE }}
    appSysID: ${{ secrets.APP_SYS_ID }}
    appScope: ${{ secrets.APP_SCOPE }}

Inputs:

• version - Application version to install. Takes the version for rollback from the install application step. steps.install_app.outputs.rollbackVersion is an id of the step

Environment variable should be set up in the Step 1

• nowUsername - Username to ServiceNow instance
• nowPassword - Password to ServiceNow instance
• nowInstallInstance - ServiceNow instance for rollback application
• appSysID - Required if app_scope is not specified. The sys_id of the application
• appScope - Required if app_sys_id is not specified. The scope name of the application, such as x_aah_custom_app

Contributing

Tests

Tests should be ran via npm commands:

Unit tests

npm run test

Integration test

npm run integration

Build

npm run buid

Formatting and Linting

npm run format
npm run lint

Notices

Support Model

ServiceNow built this integration with the intent to help customers get started faster in adopting CI/CD APIs for DevOps workflows, but will not be providing formal support. This integration is therefore considered "use at your own risk", and will rely on the open-source community to help drive fixes and feature enhancements via Issues. Occasionally, ServiceNow may choose to contribute to the open-source project to help address the highest priority Issues, and will do our best to keep the integrations updated with the latest API changes shipped with family releases. This is a good opportunity for our customers and community developers to step up and help drive iteration and improvement on these open-source integrations for everyone's benefit.

Governance Model

Initially, ServiceNow product management and engineering representatives will own governance of these integrations to ensure consistency with roadmap direction. In the longer term, we hope that contributors from customers and our community developers will help to guide prioritization and maintenance of these integrations. At that point, this governance model can be updated to reflect a broader pool of contributors and maintainers.