Podcast
Questions and Answers
What is the recommended starting point for network security measures in Amazon EKS?
What is the recommended starting point for network security measures in Amazon EKS?
What is Calico Enterprise's feature that allows mapping a Kubernetes network policy to an AWS security group?
What is Calico Enterprise's feature that allows mapping a Kubernetes network policy to an AWS security group?
What is the purpose of the istio-agent in Istio's identity management system?
What is the purpose of the istio-agent in Istio's identity management system?
What is the purpose of the istio-csr agent in Istio's identity management system?
What is the purpose of the istio-csr agent in Istio's identity management system?
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What is the AWS-native way to control network traffic within and outside of an Amazon EKS cluster?
What is the AWS-native way to control network traffic within and outside of an Amazon EKS cluster?
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Which service mesh can be used for encryption in transit in Amazon EKS?
Which service mesh can be used for encryption in transit in Amazon EKS?
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What is the purpose of the AWS VPC Security Groups in Amazon EKS?
What is the purpose of the AWS VPC Security Groups in Amazon EKS?
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What is the purpose of ACM Private CA in Istio's Certificate Signing process?
What is the purpose of ACM Private CA in Istio's Certificate Signing process?
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Study Notes
Network Security Measures for Amazon EKS
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Network security measures for Amazon EKS involve traffic control and encryption in transit.
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Kubernetes network policies provide a mechanism to restrict network traffic between Pods and external services.
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Calico is an open source policy engine that supports extended network policies with a richer set of features.
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Calico Enterprise includes a feature that allows mapping a Kubernetes network policy to an AWS security group.
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Security groups for pods offer an AWS-native way to control network traffic within and outside of a cluster.
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Encryption in transit can be implemented using Nitro instances, Container Network Interfaces, or service meshes like App Mesh, Linkerd v2, and Istio.
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Ingress controllers can be configured to terminate SSL/TLS connections, and ACM Private CA with cert-manager can be used to enable TLS and mTLS to secure EKS application workloads.
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It is recommended to start with a default deny policy and incrementally add rules to selectively allow the flow of traffic between namespaces/pods.
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DNS queries can be allowed by adding a global rule that allows pods to query CoreDNS for name resolution.
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Calico policies can be scoped to Namespaces, Pods, service accounts, or globally.
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AWS VPC Security Groups are used to control the traffic between the Kubernetes control plane and the cluster's worker nodes.
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ACM Private CA is a highly-available, secure, managed CA that secures private keys in FIPS 140-2 Level 3 hardware security modules.Certificate Signing in Istio with ACM Private CA
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Kubernetes uses service accounts as identities, but Istio has its own identity management system and CA.
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Workloads in Istio need an identity assigned from Istio to be deemed trustworthy and communicate with other services in the mesh.
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The istio-agent sends a certificate signing request (CSR) containing the service account token to Istio's control plane to get an identity.
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Istiod acts as both the Registration Authority (RA) and the CA, verifying the CSR and issuing a certificate with a SPIFFE identity.
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The SPIFFE verifiable identity document (SVID) is assigned to the requesting service for identification and to encrypt traffic in transit.
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The Istio Certificate Signing Request agent (istio-csr) integrates Istio with ACM Private CA using cert-manager.
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The istio-csr agent converts incoming CSRs into resources that cert-manager supports and requests certificates from ACM Private CA.
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The AWS Private CA issuer plugin enables communication between istio-csr and ACM Private CA to request signed certificates for workloads.
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Cert-manager uses the issuer plugin to request TLS certificates from ACM Private CA.
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Once the certificate is signed, it is returned to istio-csr, which returns it to the workload that initiated the CSR.
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To set up this integration, Istio must be installed with custom configurations to replace the certificate provider for the mesh.
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This process can be carried out using the Istio Operator Tooling.
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Description
Test your knowledge of network security measures for Amazon EKS and certificate signing in Istio with ACM Private CA with this quiz. Learn about traffic control, encryption in transit, Kubernetes network policies, Calico, and more. Find out how Istio uses its own identity management system and CA, and how to integrate it with ACM Private CA using cert-manager. Challenge yourself and see how much you know about securing your EKS application workloads.
