76 lines
1.9 KiB
Markdown
76 lines
1.9 KiB
Markdown
# Generating the Data Encryption Config and Key
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Kubernetes stores a variety of data including cluster state, application configurations, and secrets. Kubernetes supports the ability to [encrypt](https://kubernetes.io/docs/tasks/administer-cluster/encrypt-data) cluster data at rest.
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In this lab you will generate an encryption key and an [encryption config](https://kubernetes.io/docs/tasks/administer-cluster/encrypt-data/#understanding-the-encryption-at-rest-configuration) suitable for encrypting Kubernetes Secrets.
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## The Encryption Key
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Generate an encryption key:
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#### Linux & OS X
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```
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ENCRYPTION_KEY=$(head -c 32 /dev/urandom | base64)
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```
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#### Windows
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```
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$ENCRYPTION_KEY=[System.Convert]::ToBase64String($(0..31 | ForEach-Object { Get-Random -Minimum 0 -Maximum 255 } ))
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```
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## The Encryption Config File
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Create the `encryption-config.yaml` encryption config file:
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#### Linux & OS X
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```
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cat > encryption-config.yaml <<EOF
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kind: EncryptionConfig
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apiVersion: v1
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resources:
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- resources:
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- secrets
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providers:
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- aescbc:
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keys:
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- name: key1
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secret: ${ENCRYPTION_KEY}
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- identity: {}
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EOF
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```
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#### Windows
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```
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New-Item encryption-config.yaml -Value @"
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kind: EncryptionConfig
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apiVersion: v1
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resources:
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- resources:
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- secrets
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providers:
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- aescbc:
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keys:
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- name: key1
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secret: ${ENCRYPTION_KEY}
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- identity: {}
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"@
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```
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Copy the `encryption-config.yaml` encryption config file to each controller instance:
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#### Linux & OS X
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```
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for instance in controller-0 controller-1 controller-2; do
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gcloud compute scp encryption-config.yaml ${instance}:~/
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done
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```
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#### Windows
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```
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@('controller-0','controller-1','controller-2') | ForEach-Object {
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gcloud compute scp encryption-config.yaml ${_}:/home/$env:USERNAME/
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}
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```
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Next: [Bootstrapping the etcd Cluster](07-bootstrapping-etcd.md)
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