add vault-renew-interval flag/var for changing the interval between vault token renewals

Author: Southclaws

main.go

@@ -66,6 +66,7 @@ this repository has new commits, Picobot will automatically reconfigure.`,
 				cli.StringFlag{Name: "vault-addr", EnvVar: "VAULT_ADDR"},
 				cli.StringFlag{Name: "vault-token", EnvVar: "VAULT_TOKEN"},
 				cli.StringFlag{Name: "vault-path", EnvVar: "VAULT_PATH"},
+				cli.DurationFlag{Name: "vault-renew-interval", EnvVar: "VAULT_RENEW_INTERVAL", Value: time.Hour * 24},
 			},
 			Action: func(c *cli.Context) (err error) {
 				if !c.Args().Present() {
@@ -96,6 +97,7 @@ this repository has new commits, Picobot will automatically reconfigure.`,
 					VaultAddress:  c.String("vault-addr"),
 					VaultToken:    c.String("vault-token"),
 					VaultPath:     c.String("vault-path"),
+					VaultRenewal:  c.Duration("vault-renew-interval"),
 				})
 				if err != nil {
 					return errors.Wrap(err, "failed to initialise")

service/service.go

@@ -41,6 +41,7 @@ type Config struct {
 	VaultAddress  string
 	VaultToken    string
 	VaultPath     string
+	VaultRenewal  time.Duration
 }
 
 // Initialise prepares an instance of the app to run
@@ -85,8 +86,7 @@ func Initialise(ctx context.Context, c Config) (app *App, err error) {
 
 // Start launches the app and blocks until fatal error
 func (app *App) Start() (final error) {
-	// Renew vault token daily
-	renew := time.NewTicker(time.Hour * 24)
+	renew := time.NewTicker(app.config.VaultRenewal)
 	defer renew.Stop()
 
 	f := func() (err error) {