fix(tunneling): Adjust exponential backoff duration

README.md

@@ -745,6 +745,9 @@ endpoints:
       - "[STATUS] == 200"
 ```
 
+> ⚠️ **WARNING**:: Tunneling may introduce additional latency, especially if the connection to the tunnel is retried frequently. 
+> This may lead to inaccurate response time measurements.
+
 
 ### Alerting
 Gatus supports multiple alerting providers, such as Slack and PagerDuty, and supports different alerts for each

config/tunneling/sshtunnel/sshtunnel.go

@@ -131,11 +131,11 @@ func (t *SSHTunnel) Dial(network, addr string) (net.Conn, error) {
 	}
 	// Attempt dial with exponential backoff retry
 	const maxRetries = 3
-	const baseDelay = time.Second
+	const baseDelay = 500 * time.Millisecond
 	var lastErr error
 	for attempt := 0; attempt < maxRetries; attempt++ {
 		if attempt > 0 {
-			// Exponential backoff: 1s, 2s, 4s
+			// Exponential backoff: 500ms, 1s, 2s
 			delay := baseDelay << (attempt - 1)
 			time.Sleep(delay)
 			// Close stale connection and reconnect

config/tunneling/tunneling.go

@@ -13,7 +13,7 @@ type Config struct {
 	// Tunnels is a map of SSH tunnel configurations in which the key is the name of the tunnel
 	Tunnels map[string]*sshtunnel.Config `yaml:",inline"`
 
-	mu          sync.RWMutex                  `yaml:"-"`
+	mu          sync.RWMutex                    `yaml:"-"`
 	connections map[string]*sshtunnel.SSHTunnel `yaml:"-"`
 }
 

config/tunneling/tunneling_test.go

@@ -188,4 +188,4 @@ func TestConfig_Close(t *testing.T) {
 	if len(config.connections) != 0 {
 		t.Errorf("Close() did not clear connections map, got %d connections", len(config.connections))
 	}
-}
+}