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99b439a6e4
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. The operator's RBAC has had some updates to ensure it can delegate the impersonation permissions that k8s-proxy requires to run its API Server proxy in auth mode where it can impersonate users and groups. 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>
62 lines
1.4 KiB
Go
62 lines
1.4 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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//go:build !plan9
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package main
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import (
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"fmt"
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"log"
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"os"
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)
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type apiServerProxyMode int
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func (a apiServerProxyMode) String() string {
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switch a {
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case apiServerProxyModeDisabled:
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return "disabled"
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case apiServerProxyModeEnabled:
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return "auth"
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case apiServerProxyModeNoAuth:
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return "noauth"
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default:
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return "unknown"
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}
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}
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const (
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apiServerProxyModeDisabled apiServerProxyMode = iota
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apiServerProxyModeEnabled
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apiServerProxyModeNoAuth
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)
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func parseAPIProxyMode() apiServerProxyMode {
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haveAuthProxyEnv := os.Getenv("AUTH_PROXY") != ""
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haveAPIProxyEnv := os.Getenv("APISERVER_PROXY") != ""
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switch {
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case haveAPIProxyEnv && haveAuthProxyEnv:
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log.Fatal("AUTH_PROXY (deprecated) and APISERVER_PROXY are mutually exclusive, please unset AUTH_PROXY")
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case haveAuthProxyEnv:
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var authProxyEnv = defaultBool("AUTH_PROXY", false) // deprecated
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if authProxyEnv {
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return apiServerProxyModeEnabled
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}
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return apiServerProxyModeDisabled
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case haveAPIProxyEnv:
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var apiProxyEnv = defaultEnv("APISERVER_PROXY", "") // true, false or "noauth"
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switch apiProxyEnv {
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case "true":
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return apiServerProxyModeEnabled
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case "false", "":
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return apiServerProxyModeDisabled
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case "noauth":
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return apiServerProxyModeNoAuth
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default:
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panic(fmt.Sprintf("unknown APISERVER_PROXY value %q", apiProxyEnv))
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}
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}
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return apiServerProxyModeDisabled
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}
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