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© 2020, Amazon Web Services, Inc. or its Affiliates.
Defining and Enforcing Policies the GitOps Way
Michael Hausenblas, AWS
Weave Online User Group, 2020-05-05
© 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential
$ whoami
• Senior Product Developer Advocate in the
AWS container service team
• Previous roles: Red Hat, Mesosphere, MapR, research
• Let’s connect:
• Slack: AWS dev, Kubernetes, CNCF, Weaveworks
• Twitter: @mhausenblas
• Mail: hausenbl@amazon.com
© 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential
programming-kubernetes.info kubernetes-security.info
Current books
© 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential
Open Policy Agent (OPA)
© 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential
• A general-purpose policy engine
• CNCF Incubating Project https://www.openpolicyagent.org
• Many integrations, from Kubernetes to WASM
What is OPA?
© 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential
How does OPA work?
© 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential
Example 1: counting
policy
data
OPA
query
play.openpolicyagent.org/p/bOlISBZwB3
© 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential
Example 2: finding reviewers
policy
data
OPA
query
play.openpolicyagent.org/p/VPe2sIy5PU
© 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential
Example 3: verifying approvals
policy
data
OPA
query
play.openpolicyagent.org/p/HJ8124kLZ7
© 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential
Kubernetes example
security good practice: use a dedicated service account for an app
check for serviceAccountName in Deployment, if not set the default SA
is used and this means we have a violation
© 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential
Using OPA openpolicyagent.org/docs/latest/integration/
OPA
app
HTTP API
Go app
OPA
example: mhausenblas/cidrchk
example: open-policy-agent/kube-mgmt
© 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential
Supply Chain
© 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential
GitOps supply chain concept
code repo
config repo
CI container registry Kubernetes cluster
© 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential
Policy use cases along the supply chain
• In the context of the IDE/editor
• Part of the repo (bot)
• Part of the CI pipeline
• Part of the runtime (Kubernetes)
© 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential
Editor plugin
open-policy-agent/vscode-opa
© 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential
Repo action or CI
instrumenta/conftest-action swade1987/deprek8ion
© 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential
In Kubernetes: Gatekeeper
open-policy-agent/gatekeeper
© 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential
In Kubernetes: Gatekeeper
open-policy-agent/gatekeeper
© 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential
Resources
© 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential
Videos
• Deep Dive: Open Policy Agent
• CNCF webinar: K8s with OPA Gatekeeper
• cloud native dev: Open Policy Agent (OPA)
Tooling
• https://play.openpolicyagent.org
• https://conftest.dev
© 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential
• https://kubernetes.io/blog/2019/08/06/opa-gatekeeper-policy-and-
governance-for-kubernetes/
• https://aws.amazon.com/blogs/opensource/using-open-policy-agent-on-
amazon-eks
• https://opensource.com/article/20/3/deprek8
• https://www.infracloud.io/opa-microservices-authorization-simplified/
• https://marcyoung.us/post/gatekeeper-v3/
Articles
© 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential
Q & A

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Defining & Enforcing Policies the GitOps Way

  • 1. © 2020, Amazon Web Services, Inc. or its Affiliates. Defining and Enforcing Policies the GitOps Way Michael Hausenblas, AWS Weave Online User Group, 2020-05-05
  • 2. © 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential $ whoami • Senior Product Developer Advocate in the AWS container service team • Previous roles: Red Hat, Mesosphere, MapR, research • Let’s connect: • Slack: AWS dev, Kubernetes, CNCF, Weaveworks • Twitter: @mhausenblas • Mail: hausenbl@amazon.com
  • 3. © 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential programming-kubernetes.info kubernetes-security.info Current books
  • 4. © 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential Open Policy Agent (OPA)
  • 5. © 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential • A general-purpose policy engine • CNCF Incubating Project https://www.openpolicyagent.org • Many integrations, from Kubernetes to WASM What is OPA?
  • 6. © 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential How does OPA work?
  • 7. © 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential Example 1: counting policy data OPA query play.openpolicyagent.org/p/bOlISBZwB3
  • 8. © 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential Example 2: finding reviewers policy data OPA query play.openpolicyagent.org/p/VPe2sIy5PU
  • 9. © 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential Example 3: verifying approvals policy data OPA query play.openpolicyagent.org/p/HJ8124kLZ7
  • 10. © 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential Kubernetes example security good practice: use a dedicated service account for an app check for serviceAccountName in Deployment, if not set the default SA is used and this means we have a violation
  • 11. © 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential Using OPA openpolicyagent.org/docs/latest/integration/ OPA app HTTP API Go app OPA example: mhausenblas/cidrchk example: open-policy-agent/kube-mgmt
  • 12. © 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential Supply Chain
  • 13. © 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential GitOps supply chain concept code repo config repo CI container registry Kubernetes cluster
  • 14. © 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential Policy use cases along the supply chain • In the context of the IDE/editor • Part of the repo (bot) • Part of the CI pipeline • Part of the runtime (Kubernetes)
  • 15. © 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential Editor plugin open-policy-agent/vscode-opa
  • 16. © 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential Repo action or CI instrumenta/conftest-action swade1987/deprek8ion
  • 17. © 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential In Kubernetes: Gatekeeper open-policy-agent/gatekeeper
  • 18. © 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential In Kubernetes: Gatekeeper open-policy-agent/gatekeeper
  • 19. © 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential Resources
  • 20. © 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential Videos • Deep Dive: Open Policy Agent • CNCF webinar: K8s with OPA Gatekeeper • cloud native dev: Open Policy Agent (OPA) Tooling • https://play.openpolicyagent.org • https://conftest.dev
  • 21. © 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential • https://kubernetes.io/blog/2019/08/06/opa-gatekeeper-policy-and- governance-for-kubernetes/ • https://aws.amazon.com/blogs/opensource/using-open-policy-agent-on- amazon-eks • https://opensource.com/article/20/3/deprek8 • https://www.infracloud.io/opa-microservices-authorization-simplified/ • https://marcyoung.us/post/gatekeeper-v3/ Articles
  • 22. © 2020, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Amazon Confidential Q & A