Example Vault token renewal operation in Go

vault-token-renew.go

package main

import (
	"fmt"
	"time"

	vault "github.com/hashicorp/vault/api"
)

func main() {
	client, _ := vault.NewClient(nil)
	ta := client.Auth().Token()

	s, err := ta.LookupSelf()
	if err != nil {
		panic(err)
	}

	for {
		renewable, _ := s.TokenIsRenewable()
		if renewable {
			d, _ := s.TokenTTL()
			fmt.Printf("Token TTL: %d (Renewing in: %d)\n", d, d/2)

			timer := time.NewTimer(d / 2)
			select {
			case <-timer.C:
				break
			}

			fmt.Printf("Incrementing Token TTL for %ds\n", d)
			s, _ = ta.RenewSelf(int(d / 2))
		}
	}
}