Move default config location to /etc/rancher/k3s/k3s.yaml

Author: ibuildthecloud

README.md

@@ -37,7 +37,7 @@ Quick Start
 
 ```bash
 sudo k3s server &
-# Kubeconfig is written to /root/.kube/k3s.yaml
+# Kubeconfig is written to /etc/rancher/k3s/k3s.yaml
 sudo k3s kubectl get node
 
 # On a different node run the below. NODE_TOKEN comes from /var/lib/rancher/k3s/server/node-token 
@@ -66,7 +66,7 @@ INFO[2019-01-22T15:16:20.273441984-07:00] Listening on :6443
 INFO[2019-01-22T15:16:20.278383446-07:00] Writing manifest: /var/lib/rancher/k3s/server/manifests/coredns.yaml 
 INFO[2019-01-22T15:16:20.474454524-07:00] Node token is available at /var/lib/rancher/k3s/server/node-token 
 INFO[2019-01-22T15:16:20.474471391-07:00] To join node to cluster: k3s agent -s https://10.20.0.3:6443 -t ${NODE_TOKEN} 
-INFO[2019-01-22T15:16:20.541027133-07:00] Wrote kubeconfig /root/.kube/k3s.yaml        
+INFO[2019-01-22T15:16:20.541027133-07:00] Wrote kubeconfig /etc/rancher/k3s/k3s.yaml
 INFO[2019-01-22T15:16:20.541049100-07:00] Run: k3s kubectl                             
 ```
 

install.sh

@@ -79,6 +79,7 @@ umount `cat /proc/self/mounts | awk '{print $2}' | grep '^/run/k3s'`
 umount `cat /proc/self/mounts | awk '{print $2}' | grep '^/var/lib/rancher/k3s'`
 
 rm -rf /var/lib/rancher/k3s
+rm -rf /etc/rancher/k3s
 
 rm -f /usr/local/bin/k3s-uninstall.sh
 EOF

pkg/datadir/datadir.go

@@ -10,6 +10,8 @@ import (
 const (
 	DefaultDataDir     = "/var/lib/rancher/k3s"
 	DefaultHomeDataDir = "${HOME}/.rancher/k3s"
+	HomeConfig         = "${HOME}/.kube/k3s.yaml"
+	GlobalConfig       = "/etc/rancher/k3s/k3s.yaml"
 )
 
 func Resolve(dataDir string) (string, error) {

pkg/kubectl/main.go

@@ -17,7 +17,7 @@ import (
 func Main() {
 	kubenv := os.Getenv("KUBECONFIG")
 	if kubenv == "" {
-		config, err := server.HomeKubeConfig()
+		config, err := server.HomeKubeConfig(false)
 		if _, serr := os.Stat(config); err == nil && serr == nil {
 			os.Setenv("KUBECONFIG", config)
 		}

pkg/server/server.go

@@ -16,6 +16,7 @@ import (
 	"github.com/pkg/errors"
 	"github.com/rancher/k3s/pkg/daemons/config"
 	"github.com/rancher/k3s/pkg/daemons/control"
+	"github.com/rancher/k3s/pkg/datadir"
 	"github.com/rancher/k3s/pkg/deploy"
 	"github.com/rancher/k3s/pkg/helm"
 	"github.com/rancher/k3s/pkg/servicelb"
@@ -147,8 +148,19 @@ func startNorman(ctx context.Context, config *Config) (string, error) {
 	}
 }
 
-func HomeKubeConfig() (string, error) {
-	return resolvehome.Resolve("${HOME}/.kube/k3s.yaml")
+func HomeKubeConfig(write bool) (string, error) {
+	if write {
+		if os.Getuid() == 0 {
+			return datadir.GlobalConfig, nil
+		}
+		return resolvehome.Resolve(datadir.HomeConfig)
+	}
+
+	if _, err := os.Stat(datadir.GlobalConfig); err == nil {
+		return datadir.GlobalConfig, nil
+	}
+
+	return resolvehome.Resolve(datadir.HomeConfig)
 }
 
 func printTokens(certs, advertiseIP string, tlsConfig *dynamiclistener.UserConfig, config *config.Control) {
@@ -177,7 +189,7 @@ func printTokens(certs, advertiseIP string, tlsConfig *dynamiclistener.UserConfi
 func writeKubeConfig(certs string, tlsConfig *dynamiclistener.UserConfig, config *config.Control) {
 	clientToken := FormatToken(config.Runtime.ClientToken, certs)
 	url := fmt.Sprintf("https://localhost:%d", tlsConfig.HTTPSPort)
-	kubeConfig, err := HomeKubeConfig()
+	kubeConfig, err := HomeKubeConfig(true)
 	def := true
 	if err != nil {
 		kubeConfig = filepath.Join(config.DataDir, "kubeconfig-k3s.yaml")
@@ -199,6 +211,8 @@ func writeKubeConfig(certs string, tlsConfig *dynamiclistener.UserConfig, config
 		} else {
 			logrus.Errorf("failed to set %s to mode %s: %v", kubeConfig, os.FileMode(mode), err)
 		}
+	} else {
+		os.Chmod(kubeConfig, os.FileMode(0644))
 	}
 
 	logrus.Infof("Wrote kubeconfig %s", kubeConfig)