cmd/kgctl: improve default kubeconfig

This commit adds better handling of the default kubeconfig location in
the kgctl binary for cases where the `$KUBECONFIG` environment variable
is not set. In these cases, kgctl will default to
`$HOME/.kube/config`, putting it in line with tools like `kubectl` and
`kind`.

Signed-off-by: Lucas Servén Marín <lserven@gmail.com>
This commit is contained in:
Lucas Servén Marín 2021-06-15 20:53:02 +02:00
parent 6542c2ee94
commit 61b52ce4ae
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@ -17,6 +17,7 @@ package main
import (
"fmt"
"os"
"path/filepath"
"strings"
"github.com/spf13/cobra"
@ -109,7 +110,11 @@ func main() {
}
cmd.PersistentFlags().StringVar(&backend, "backend", k8s.Backend, fmt.Sprintf("The backend for the mesh. Possible values: %s", availableBackends))
cmd.PersistentFlags().StringVar(&granularity, "mesh-granularity", string(mesh.LogicalGranularity), fmt.Sprintf("The granularity of the network mesh to create. Possible values: %s", availableGranularities))
cmd.PersistentFlags().StringVar(&kubeconfig, "kubeconfig", os.Getenv("KUBECONFIG"), "Path to kubeconfig.")
defaultKubeconfig := os.Getenv("KUBECONFIG")
if _, err := os.Stat(defaultKubeconfig); os.IsNotExist(err) {
defaultKubeconfig = filepath.Join(os.Getenv("HOME"), ".kube/config")
}
cmd.PersistentFlags().StringVar(&kubeconfig, "kubeconfig", defaultKubeconfig, "Path to kubeconfig.")
cmd.PersistentFlags().Uint32Var(&opts.port, "port", mesh.DefaultKiloPort, "The WireGuard port over which the nodes communicate.")
cmd.PersistentFlags().StringVar(&topologyLabel, "topology-label", k8s.RegionLabelKey, "Kubernetes node label used to group nodes into logical locations.")