Continuous Monitoring

<>

Development

If you're new to Rails, see the Getting Started with Rails guide for an introduction to the framework.

Local Setup

• Install Ruby 3.3.4
• Install NodeJS 22.8.0
• Install homebrew dependencies: brew bundle
  • redis
  • PostgreSQL
  • Dockerize
  • jq
  • ADR Tools
  • Chromedriver
  • Chromedriver must be allowed to run. You can either do that by:
    • The command line: xattr -d com.apple.quarantine $(which chromedriver) (this is the only option if you are on Big Sur)
    • Manually: clicking "allow" when you run the integration tests for the first time and a dialogue opens up
• Install Ruby dependencies: bundle install
• Install JS dependencies: yarn install
• Create database and run migrations: bundle exec rake db:setup
• Run the server: bin/dev
• Visit the site: http://localhost:3000

Local Configuration

Environment variables can be set in development using the dotenv gem.

Consistent but sensitive credentials should be added to config/credentials.yml.enc by using $ rails credentials:edit

Production credentials should be added to config/credentials/production.yml.enc by using $ rails credentials:edit --environment production

Any changes to variables in .env that should not be checked into git should be set in .env.local.

If you wish to override a config globally for the test Rails environment you can set it in .env.test.local. However, any config that should be set on other machines should either go into .env or be explicitly set as part of the test.

Security

Authentication

TBD

Inline <script> and <style> security

The system's Content-Security-Policy header prevents <script> and <style> tags from working without further configuration. Use <%= javascript_tag nonce: true %> for inline javascript.

See the CSP compliant script tag helpers ADR for more information on setting these up successfully.

Internationalization

Managing locale files

We use the gem i18n-tasks to manage locale files. Here are a few common tasks:

Add missing keys across locales:

$ i18n-tasks missing # shows missing keys
$ i18n-tasks add-missing # adds missing keys across locale files

Key sorting:

$ i18n-tasks normalize

Removing unused keys:

$ i18n-tasks unused # shows unused keys
$ i18n-tasks remove-unused # removes unused keys across locale files

For more information on usage and helpful rake tasks to manage locale files, see the documentation.

Testing

Running tests

• Tests: bundle exec rake spec
• Ruby linter: bundle exec rake standard
• Accessibility scan: ./bin/pa11y-scan
• Dynamic security scan: ./bin/owasp-scan
• Ruby static security scan: bundle exec rake brakeman
• Ruby dependency checks: bundle exec rake bundler:audit
• JS dependency checks: bundle exec rake yarn:audit

Run everything: bundle exec rake

Pa11y Scan

When new pages are added to the application, ensure they are added to ./pa11y.js so that they can be scanned.

Automatic linting and terraform formatting

To enable automatic ruby linting and terraform formatting on every git commit follow the instructions at the top of .githooks/pre-commit

CI/CD

GitHub actions are used to run all tests and scans as part of pull requests.

Security scans are also run on a scheduled basis. Weekly for static code scans, and daily for dependency scans.

Deployment

Each environment has dependencies on a PostgreSQL RDS instance managed by cloud.gov. See cloud.gov docs for information on RDS.

Staging

Deploys to staging, including applying changes in terraform, happen on every push to the main branch in GitHub.

The following secrets must be set within the staging environment secrets to enable a deploy to work:

Production

Deploys to production, including applying changes in terraform, happen on every push to the production branch in GitHub.

The following secrets must be set within the production environment secrets to enable a deploy to work:

Configuring ENV variables in cloud.gov

All configuration that needs to be added to the deployed application's ENV should be added to the env: block in manifest.yml

Items that are both public and consistent across staging and production can be set directly there.

Otherwise, they are set as a ((variable)) within manifest.yml and the variable is defined depending on sensitivity:

Credentials and other Secrets

1. Store variables that must be secret using GitHub Environment Secrets
2. Add the appropriate --var addition to the cf_command line on the deploy action like the existing rails_master_key

Non-secrets

Configuration that changes from staging to production, but is public, should be added to config/deployment/staging.yml and config/deployment/production.yml

Public Egress Proxy

Traffic to be delivered to the public internet or s3 must be proxied through the cg-egress-proxy app.

To deploy the proxy manually:

1. Ensure terraform state is up to date.
2. Update the acl files in config/deployment/egress_proxy
3. Deploy the proxy to staging: bin/ops/deploy_egress_proxy.rb -s rahearn -a continuous_monitoring-staging
4. Deploy the proxy to production: bin/ops/deploy_egress_proxy.rb -s rahearn -a continuous_monitoring-production

See the ruby troubleshooting doc first if you have any problems making outbound connections through the proxy.

Public Egress Proxy

Traffic to be delivered to the public internet must be proxied through the cg-egress-proxy app. Hostnames that the app should be able to reach should be added to the allowlist terraform configuration in terraform/staging/main.tf and terraform/production/main.tf

See the ruby troubleshooting doc first if you have any problems making outbound connections through the proxy.

Documentation

Auditree Control Validation

Auditree is used within CI/CD to validate that certain controls are in place.

• Run bin/auditree to start the auditree CLI.
• Run bin/auditree SCRIPT_NAME to run a single auditree script

Initial auditree setup.

These steps must happen once per project.

1. Docker desktop must be running
2. Initialize the config file with bin/auditree init > config/auditree.template.json
3. Create an evidence locker repository with a default or blank README
4. Create a github personal access token to interact with the code repo and evidence locker and set as AUDITREE_GITHUB_TOKEN secret within your Github Actions secrets.
5. Update config/auditree.template.json with the repo addresses for your locker and code repos
6. Copy the devtools_cloud_gov component definition into the project with the latest docker-trestle

Ongoing use

See the auditree-devtools README for help with updating auditree and using new checks.

Compliance Documentation

Security Controls should be documented within doc/compliance/oscal.

• Run bin/trestle to start the trestle CLI.
• Run bin/trestle SCRIPT_NAME to run a single trestle script

Initial trestle setup.

These steps must happen once per project.

1. Docker desktop must be running
2. Start the trestle cli with bin/trestle
3. Copy the cloud_gov component to the local workspace with copy-component -n cloud_gov
4. Generate the initial markdown with generate-ssp-markdown

Ongoing use

See the docker-trestle README for help with the workflow for using those scripts for editing the SSP.

Architectural Decision Records

Architectural Decision Records (ADR) are stored in doc/adr To create a new ADR, first install ADR-tools if you don't already have it installed.

• brew bundle or brew install adr-tools

Then create the ADR:

• adr new Title Of Architectural Decision

This will create a new, numbered ADR in the doc/adr directory.

Compliance diagrams are stored in doc/compliance. See the README there for more information on generating diagram updates.

Contributing

This will continue to evolve as the project moves forward.

• Pull down the most recent main before checking out a branch
• Write your code
• If a big architectural decision was made, add an ADR
• Submit a PR
  • If you added functionality, please add tests.
  • All tests must pass!
• Ping the other engineers for a review.
• At least one approving review is required for merge.
• Rebase against main before merge to ensure your code is up-to-date!
• Merge after review.
  • Squash commits into meaningful chunks of work and ensure that your commit messages convey meaning.

Story Acceptance

TBD