From ffaa5722669ea60ca0bc6aa3cd1e6f16c12316c2 Mon Sep 17 00:00:00 2001
From: Maisem Ali <maisem@tailscale.com>
Date: Thu, 14 Oct 2021 22:57:36 -0400
Subject: [PATCH] hostinfo: add EnvType for Kubernetes

Signed-off-by: Maisem Ali <maisem@tailscale.com>
(cherry picked from commit 2662a1c98c1c4c67d9abeb0baddc352d74cd33ef)
---
 hostinfo/hostinfo.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/hostinfo/hostinfo.go b/hostinfo/hostinfo.go
index 9b9eb8959..959450c70 100644
--- a/hostinfo/hostinfo.go
+++ b/hostinfo/hostinfo.go
@@ -82,6 +82,7 @@ func packageType() string {
 	AzureAppService = EnvType("az")
 	AWSFargate      = EnvType("fg")
 	FlyDotIo        = EnvType("fly")
+	Kubernetes      = EnvType("k8s")
 )
 
 var envType atomic.Value // of EnvType
@@ -136,6 +137,9 @@ func getEnvType() EnvType {
 	if inFlyDotIo() {
 		return FlyDotIo
 	}
+	if inKubernetes() {
+		return Kubernetes
+	}
 	return ""
 }
 
@@ -212,3 +216,10 @@ func inFlyDotIo() bool {
 	}
 	return false
 }
+
+func inKubernetes() bool {
+	if os.Getenv("KUBERNETES_SERVICE_HOST") != "" && os.Getenv("KUBERNETES_SERVICE_PORT") != "" {
+		return true
+	}
+	return false
+}