Learn CLOUD-CUSTODIAN with Real Code Examples

Terminate unused EC2 instances to reduce costs

Ensure S3 buckets are encrypted

Detect publicly exposed databases and remediate

Tag untagged resources automatically

Enforce IAM policy compliance across accounts

Check policy syntax with `custodian validate`

Review CLI output and logs

Verify cloud credentials and permissions

Test policy on sample resources before production

Debug filters and actions individually

Validate policy syntax using `custodian validate`

Run policies in dry-run mode

Check logs for errors or unexpected selections

Test remediation actions in sandbox

Iteratively refine filters and actions

Run policies manually via CLI

Schedule policies using cron or cloud-native schedulers

Use event-driven mode for real-time enforcement

Integrate policies into CI/CD pipelines

Automate reporting to dashboards or messaging platforms

Cloud Custodian CLI

Policy YAML files

Cloud provider APIs (AWS, Azure, GCP)

Output integrations (S3, Slack, databases)

Event triggers (CloudWatch, EventBridge, Pub/Sub)

AWS services (EC2, S3, RDS, IAM, etc.)

Azure resources (VM, Storage, RBAC, etc.)

GCP resources (Compute, Storage, IAM, etc.)

Notification systems (Slack, email, SNS, Teams)

CI/CD pipelines for automated governance

Reuse filters and actions across policies

Store policies in Git for version control

Use dry-run mode for safe testing

Integrate with notifications to track violations

Automate reporting for compliance teams

Complex multi-cloud policy design

Debugging large-scale policy execution

Handling API rate limits and throttling

Ensuring least-privilege access

Maintaining policies across accounts and environments