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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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kube/kubetypes/types.go
+10 -8
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@@ -5,14 +5,15 @@ package kubetypes
const (
// Hostinfo App values for the Tailscale Kubernetes Operator components.
AppOperator = "k8s-operator"
AppAPIServerProxy = "k8s-operator-proxy"
AppIngressProxy = "k8s-operator-ingress-proxy"
AppIngressResource = "k8s-operator-ingress-resource"
AppEgressProxy = "k8s-operator-egress-proxy"
AppConnector = "k8s-operator-connector-resource"
AppProxyGroupEgress = "k8s-operator-proxygroup-egress"
AppProxyGroupIngress = "k8s-operator-proxygroup-ingress"
AppOperator = "k8s-operator"
AppInProcessAPIServerProxy = "k8s-operator-proxy"
AppIngressProxy = "k8s-operator-ingress-proxy"
AppIngressResource = "k8s-operator-ingress-resource"
AppEgressProxy = "k8s-operator-egress-proxy"
AppConnector = "k8s-operator-connector-resource"
AppProxyGroupEgress = "k8s-operator-proxygroup-egress"
AppProxyGroupIngress = "k8s-operator-proxygroup-ingress"
AppProxyGroupKubeAPIServer = "k8s-operator-proxygroup-kube-apiserver"
// Clientmetrics for Tailscale Kubernetes Operator components
MetricIngressProxyCount = "k8s_ingress_proxies" // L3
@@ -29,6 +30,7 @@ const (
MetricEgressServiceCount = "k8s_egress_service_resources"
MetricProxyGroupEgressCount = "k8s_proxygroup_egress_resources"
MetricProxyGroupIngressCount = "k8s_proxygroup_ingress_resources"
MetricProxyGroupAPIServerCount = "k8s_proxygroup_kube_apiserver_resources"
// Keys that containerboot writes to state file that can be used to determine its state.
// fields set in Tailscale state Secret. These are mostly used by the Tailscale Kubernetes operator to determine