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cmd/{k8s-operator,k8s-proxy}: add kube-apiserver ProxyGroup type (#16266)

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Adds a new k8s-proxy command to convert operator's in-process proxy to
a separately deployable type of ProxyGroup: kube-apiserver. k8s-proxy
reads in a new config file written by the operator, modelled on tailscaled's
conffile but with some modifications to ensure multiple versions of the
config can co-exist within a file. This should make it much easier to
support reading that config file from a Kube Secret with a stable file name.

To avoid needing to give the operator ClusterRole{,Binding} permissions,
the helm chart now optionally deploys a new static ServiceAccount for
the API Server proxy to use if in auth mode.

Proxies deployed by kube-apiserver ProxyGroups currently work the same as
the operator's in-process proxy. They do not yet leverage Tailscale Services
for presenting a single HA DNS name.

Updates #13358

Change-Id: Ib6ead69b2173c5e1929f3c13fb48a9a5362195d8
Signed-off-by: Tom Proctor <tomhjp@users.noreply.github.com>
This commit is contained in:
Tom Proctor
2025-07-09 09:21:56 +01:00
committed by GitHub
parent 90bf0a97b3
commit 4dfed6b146
31 changed files with 1788 additions and 351 deletions
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46
cmd/k8s-operator/deploy/crds/tailscale.com_proxyclasses.yaml
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@@ -1379,12 +1379,21 @@ spec:
type: string
image:
description: |-
Container image name. By default images are pulled from
docker.io/tailscale/tailscale, but the official images are also
available at ghcr.io/tailscale/tailscale. Specifying image name here
will override any proxy image values specified via the Kubernetes
operator's Helm chart values or PROXY_IMAGE env var in the operator
Deployment.
Container image name. By default images are pulled from docker.io/tailscale,
but the official images are also available at ghcr.io/tailscale.
For all uses except on ProxyGroups of type "kube-apiserver", this image must
be either tailscale/tailscale, or an equivalent mirror of that image.
To apply to ProxyGroups of type "kube-apiserver", this image must be
tailscale/k8s-proxy or a mirror of that image.
For "tailscale/tailscale"-based proxies, specifying image name here will
override any proxy image values specified via the Kubernetes operator's
Helm chart values or PROXY_IMAGE env var in the operator Deployment.
For "tailscale/k8s-proxy"-based proxies, there is currently no way to
configure your own default, and this field is the only way to use a
custom image.
https://kubernetes.io/docs/reference/kubernetes-api/workload-resources/pod-v1/#image
type: string
imagePullPolicy:
@@ -1655,7 +1664,9 @@ spec:
PodSecurityContext, the value specified in SecurityContext takes precedence.
type: string
tailscaleInitContainer:
description: Configuration for the proxy init container that enables forwarding.
description: |-
Configuration for the proxy init container that enables forwarding.
Not valid to apply to ProxyGroups of type "kube-apiserver".
type: object
properties:
debug:
@@ -1709,12 +1720,21 @@ spec:
type: string
image:
description: |-
Container image name. By default images are pulled from
docker.io/tailscale/tailscale, but the official images are also
available at ghcr.io/tailscale/tailscale. Specifying image name here
will override any proxy image values specified via the Kubernetes
operator's Helm chart values or PROXY_IMAGE env var in the operator
Deployment.
Container image name. By default images are pulled from docker.io/tailscale,
but the official images are also available at ghcr.io/tailscale.
For all uses except on ProxyGroups of type "kube-apiserver", this image must
be either tailscale/tailscale, or an equivalent mirror of that image.
To apply to ProxyGroups of type "kube-apiserver", this image must be
tailscale/k8s-proxy or a mirror of that image.
For "tailscale/tailscale"-based proxies, specifying image name here will
override any proxy image values specified via the Kubernetes operator's
Helm chart values or PROXY_IMAGE env var in the operator Deployment.
For "tailscale/k8s-proxy"-based proxies, there is currently no way to
configure your own default, and this field is the only way to use a
custom image.
https://kubernetes.io/docs/reference/kubernetes-api/workload-resources/pod-v1/#image
type: string
imagePullPolicy: