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Reduce SSH poll interval to 500ms with immediate probe #63

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Merged
JAORMX merged 1 commit into from
Apr 7, 2026
Merged

Reduce SSH poll interval to 500ms with immediate probe #63

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15 changes: 13 additions & 2 deletions ssh/client.go
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Original file line number Diff line number Diff line change
Expand Up @@ -24,7 +24,7 @@ import (

const (
// sshWaitPollInterval is the interval between SSH readiness polls.
sshWaitPollInterval = 2 * time.Second
sshWaitPollInterval = 200 * time.Millisecond

// defaultSSHTimeout is the default timeout for SSH connection attempts.
defaultSSHTimeout = 10 * time.Second
Expand Down Expand Up @@ -232,10 +232,21 @@ func (c *Client) WaitForReady(ctx context.Context) error {
"user", c.user,
)

// Probe immediately before starting the ticker to avoid wasting
// up to one full poll interval when SSH is already ready.
probeCount := 1
if err := c.probe(ctx); err == nil {
span.SetAttributes(attribute.Int("ssh.probes_total", probeCount))
slog.Info("SSH is ready",
"host", c.host,
"port", c.port,
)
return nil
}

ticker := time.NewTicker(sshWaitPollInterval)
defer ticker.Stop()

probeCount := 0
for {
select {
case <-ctx.Done():
Expand Down
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