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update doc for BoundServiceAccountTokenVolume and RootCAConfigMap #27082

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Mar 26, 2021
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update doc for BoundServiceAccountTokenVolume and RootCAConfigMap #27082

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5 changes: 2 additions & 3 deletions content/en/docs/reference/access-authn-authz/service-accounts-admin.md
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Original file line number Diff line number Diff line change
Expand Up @@ -60,9 +60,9 @@ It acts synchronously to modify pods as they are created or updated. When this p
1. It adds a `volumeSource` to each container of the pod mounted at `/var/run/secrets/kubernetes.io/serviceaccount`.

#### Bound Service Account Token Volume
{{< feature-state for_k8s_version="v1.13" state="alpha" >}}
{{< feature-state for_k8s_version="v1.21" state="beta" >}}

When the `BoundServiceAccountTokenVolume` feature gate is enabled, the service account admission controller will
When the `BoundServiceAccountTokenVolume` [feature gate](/docs/reference/command-line-tools-reference/feature-gates/) is enabled, the service account admission controller will
add a projected service account token volume instead of a secret volume. The service account token will expire after 1 hour by default or the pod is deleted. See more details about [projected volume](/docs/tasks/configure-pod-container/configure-projected-volume-storage/).

This feature depends on the `RootCAConfigMap` feature gate enabled which publish a "kube-root-ca.crt" ConfigMap to every namespace. This ConfigMap contains a CA bundle used for verifying connections to the kube-apiserver.
Expand Down Expand Up @@ -140,4 +140,3 @@ kubectl delete secret mysecretname

A ServiceAccount controller manages the ServiceAccounts inside namespaces, and
ensures a ServiceAccount named "default" exists in every active namespace.

8 changes: 5 additions & 3 deletions content/en/docs/reference/command-line-tools-reference/feature-gates.md
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Expand Up @@ -59,7 +59,8 @@ different Kubernetes components.
| `AnyVolumeDataSource` | `false` | Alpha | 1.18 | |
| `AppArmor` | `true` | Beta | 1.4 | |
| `BalanceAttachedNodeVolumes` | `false` | Alpha | 1.11 | |
| `BoundServiceAccountTokenVolume` | `false` | Alpha | 1.13 | |
| `BoundServiceAccountTokenVolume` | `false` | Alpha | 1.13 | 1.20 |
| `BoundServiceAccountTokenVolume` | `true` | Beta | 1.21 | |
| `CPUManager` | `false` | Alpha | 1.8 | 1.9 |
| `CPUManager` | `true` | Beta | 1.10 | |
| `CSIInlineVolume` | `false` | Alpha | 1.15 | 1.15 |
Expand Down Expand Up @@ -155,8 +156,6 @@ different Kubernetes components.
| `RemainingItemCount` | `false` | Alpha | 1.15 | |
| `RemoveSelfLink` | `false` | Alpha | 1.16 | 1.19 |
| `RemoveSelfLink` | `true` | Beta | 1.20 | |
| `RootCAConfigMap` | `false` | Alpha | 1.13 | 1.19 |
| `RootCAConfigMap` | `true` | Beta | 1.20 | |
| `RotateKubeletServerCertificate` | `false` | Alpha | 1.7 | 1.11 |
| `RotateKubeletServerCertificate` | `true` | Beta | 1.12 | |
| `RunAsGroup` | `true` | Beta | 1.14 | |
Expand Down Expand Up @@ -309,6 +308,9 @@ different Kubernetes components.
| `ResourceQuotaScopeSelectors` | `false` | Alpha | 1.11 | 1.11 |
| `ResourceQuotaScopeSelectors` | `true` | Beta | 1.12 | 1.16 |
| `ResourceQuotaScopeSelectors` | `true` | GA | 1.17 | - |
| `RootCAConfigMap` | `false` | Alpha | 1.13 | 1.19 |
| `RootCAConfigMap` | `true` | Beta | 1.20 | 1.20 |
| `RootCAConfigMap` | `true` | GA | 1.21 | - |
Comment on lines +311 to +313
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Remember to remove this feature gate from the previous table (it's not yet automated, sorry).

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done

| `RotateKubeletClientCertificate` | `true` | Beta | 1.8 | 1.18 |
| `RotateKubeletClientCertificate` | `true` | GA | 1.19 | - |
| `RuntimeClass` | `false` | Alpha | 1.12 | 1.13 |
Expand Down