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53 lines
2.5 KiB
Markdown
53 lines
2.5 KiB
Markdown
# Security
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Typhoon aims to be minimal and secure. We're running it ourselves after all.
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## Overview
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**Kubernetes**
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* etcd with peer-to-peer and client-auth TLS
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* Generated kubelet TLS certificates and `kubeconfig` (365 days)
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* [Role-Based Access Control](https://kubernetes.io/docs/admin/authorization/rbac/) is enabled. Apps must define RBAC policies
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* Workloads run on worker nodes only, unless they tolerate the master taint
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* Kubernetes [Network Policy](https://kubernetes.io/docs/concepts/services-networking/network-policies/) and Calico [Policy](https://docs.projectcalico.org/latest/reference/calicoctl/resources/policy) support [^1]
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[^1]: Requires `networking = "calico"`. Calico is the default on AWS, bare-metal, and Google Cloud. Azure and Digital Ocean are limited to `networking = "flannel"`.
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**Hosts**
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* Container Linux auto-updates are enabled
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* Hosts limit logins to SSH key-based auth (user "core")
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**Platform**
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* Cloud firewalls limit access to ssh, kube-apiserver, and ingress
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* No cluster credentials are stored in Matchbox (used for bare-metal)
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* No cluster credentials are stored in Digital Ocean metadata
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* Cluster credentials are stored in AWS metadata (for ASGs)
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* Cluster credentials are stored in Azure metadata (for scale sets)
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* Cluster credentials are stored in Google Cloud metadata (for managed instance groups)
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* No account credentials are available to Digital Ocean droplets
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* No account credentials are available to AWS EC2 instances (no IAM permissions)
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* No account credentials are available to Azure instances (no IAM permissions)
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* No account credentials are available to Google Cloud instances (no IAM permissions)
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## Precautions
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Typhoon limits exposure to many security threats, but it is not a silver bullet. As usual,
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* Do not run untrusted images or accept manifests from strangers
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* Do not give untrusted users a shell behind your firewall
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* Define network policies for your namespaces
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## OpenPGP Signing
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Typhoon uses upstream container images and binaries. We do not distribute artifacts of our own, except where required for system container images ([etcd](https://quay.io/repository/poseidon/etcd), [kubelet](https://quay.io/repository/poseidon/kubelet), [bootkube](https://quay.io/repository/poseidon/bootkube)) for Fedora Atomic only.
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If you find artifacts claiming to be from Typhoon, please send a note.
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## Disclosures
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If you find security issues, please email dghubble at gmail. If the issue lies in upstream Kubernetes, please inform upstream Kubernetes as well.
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