OPA and cloud resources

Transcript

1. 1 OPA & cloud resources July 7th 2021, Open Policy

   Agent Rego Knowledge Sharing Meetup @toshi0607

2. 2 Self introduction • Toshinori Sugita ◦ @toshi0607 • Job

   ◦ 2018 Merpay ▪ microservice development ◦ 2020 Mercari ▪ microservice platform (platform infra) • Books ◦ 『GCPで学ぶTerraform 基礎編/実践編』 ◦ Knative本 × 3

3. 3 OPA in Mercari • Preparing guardrails for Istio at

   scale • Enhance Kubernetes Security with Gatekeeper • Open Policy AgentとSpinnakerで実現するマイクロサービ スの安全な継続的デリバリー • Introduce Conftest

4. 4 OPA in Mercari for Kubernetes • Capabilities • Host

   namespaces • Host network • Host path • Privileged container • Wildcard torelations • Dedicated node pool access • Liveness/Readiness prove • Memory request/limit • Pre stop • PDB • HPA • VPA • Datadog Metric • Istio config • DNS config • External IP • Service type

5. 5 Example: Capabilities

6. 6 Example: Capabilities

7. 7 OPA for cloud resources • Domain agnostic and general

   purpose policy engine • terraform plan and configuration can be converted to JSON • Conftest supports JSON and HCL/HCL2

8. 8 Differences from use cases for Kubernetes • No gatekeeper

   ◦ Terraform -> GCP API • Conftest ◦ conftest verify ◦ conftest test

9. 9 Differences from existing Terraform tools • terraform fmt ◦

   Terraform style convention • terraform validate ◦ Terraform syntax • terraform-linters/tflint ◦ GCP API compatibility • terraform variable (v0.13~) ◦ General context for input via variable • OPA ◦ General context (reliability, security, company convention, etc.)

10. 10 Use cases • Production readiness check ◦ Cloud SQL

    backup, auto resize, maintenance window ◦ Cloud Storage multi-regional, versioning • Terraform module guard rail ◦ Allow list ◦ Service company, country, environment ◦ Module version ◦ Unintended combination

11. 11 Example: Terraform module

12. 12 Takeaways • OPA & Conftest support not only Kubernetes

    but also a cloud resource (Terraform) use case • OPA & Conftest covers fine-grained use cases that existing tools don’t support