Maint: rename health OpenVPN names to VPN

- `HEALTH_OPENVPN_DURATION_INITIAL` renamed to `HEALTH_VPN_DURATION_INITIAL` with retro-compatiblity
- `HEALTH_OPENVPN_DURATION_ADDITION` renamed to `HEALTH_VPN_DURATION_ADDITION` with retro-compatiblity

internal/healthcheck/health.go

@@ -23,7 +23,7 @@ func (s *Server) runHealthcheckLoop(ctx context.Context, done chan<- struct{}) {
 		if previousErr != nil && err == nil {
 			s.logger.Info("healthy!")
 			s.vpn.healthyTimer.Stop()
-			s.vpn.healthyWait = s.config.OpenVPN.Initial
+			s.vpn.healthyWait = s.config.VPN.Initial
 		} else if previousErr == nil && err != nil {
 			s.logger.Info("unhealthy: " + err.Error())
 			s.vpn.healthyTimer.Stop()
@@ -40,7 +40,7 @@ func (s *Server) runHealthcheckLoop(ctx context.Context, done chan<- struct{}) {
 				return
 			case <-timer.C:
 			case <-s.vpn.healthyTimer.C:
-				s.onUnhealthyOpenvpn(ctx)
+				s.onUnhealthyVPN(ctx)
 			}
 			continue
 		}

internal/healthcheck/openvpn.go

@@ -14,11 +14,11 @@ type vpnHealth struct {
 	healthyTimer *time.Timer
 }
 
-func (s *Server) onUnhealthyOpenvpn(ctx context.Context) {
+func (s *Server) onUnhealthyVPN(ctx context.Context) {
 	s.logger.Info("program has been unhealthy for " +
-		s.vpn.healthyWait.String() + ": restarting OpenVPN")
+		s.vpn.healthyWait.String() + ": restarting VPN")
 	_, _ = s.vpn.looper.ApplyStatus(ctx, constants.Stopped)
 	_, _ = s.vpn.looper.ApplyStatus(ctx, constants.Running)
-	s.vpn.healthyWait += s.config.OpenVPN.Addition
+	s.vpn.healthyWait += s.config.VPN.Addition
 	s.vpn.healthyTimer = time.NewTimer(s.vpn.healthyWait)
 }

internal/healthcheck/server.go

@@ -32,7 +32,7 @@ func NewServer(config configuration.Health,
 		config:   config,
 		vpn: vpnHealth{
 			looper:      vpnLooper,
-			healthyWait: config.OpenVPN.Initial,
+			healthyWait: config.VPN.Initial,
 		},
 	}
 }