crowdsecurity/crowdsec · error

only one 'follow_stdout' parameters is required, not many

Error message

only one 'follow_stdout' parameters is required, not many

What it means

DSN validation in docker ConfigureByDSN: the follow_stdout query parameter is repeated. The value is parsed with strconv.ParseBool into a single FollowStdout/ShowStdout setting, so more than one occurrence is ambiguous and rejected.

Source

Thrown at pkg/acquisition/modules/docker/config.go:267

			}
			lvl, err := log.ParseLevel(v[0])
			if err != nil {
				return fmt.Errorf("unknown level %s: %w", v[0], err)
			}
			d.logger.Logger.SetLevel(lvl)
		case "until":
			if len(v) != 1 {
				return errors.New("only one 'until' parameters is required, not many")
			}
			d.containerLogsOptions.Until = v[0]
		case "since":
			if len(v) != 1 {
				return errors.New("only one 'since' parameters is required, not many")
			}
			d.containerLogsOptions.Since = v[0]
		case "follow_stdout":
			if len(v) != 1 {
				return errors.New("only one 'follow_stdout' parameters is required, not many")
			}
			followStdout, err := strconv.ParseBool(v[0])
			if err != nil {
				return fmt.Errorf("parsing 'follow_stdout' parameters: %s", err)
			}
			d.Config.FollowStdout = followStdout
			d.containerLogsOptions.ShowStdout = followStdout
		case "follow_stderr":
			if len(v) != 1 {
				return errors.New("only one 'follow_stderr' parameters is required, not many")
			}
			followStdErr, err := strconv.ParseBool(v[0])
			if err != nil {
				return fmt.Errorf("parsing 'follow_stderr' parameters: %s", err)
			}
			d.Config.FollowStdErr = followStdErr
			d.containerLogsOptions.ShowStderr = followStdErr
		case "docker_host":

View on GitHub (pinned to 909b515798)

Solutions

1. Pass follow_stdout=true (or false) at most once
2. Note the value must parse as a bool — non-bool values fail separately with a parse error

When it happens

Trigger: Thrown at pkg/acquisition/modules/docker/config.go:267 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of crowdsecurity/crowdsec@909b515798 (2026-09-06). Data as JSON: /api/errors/15c649ec50762af8. Report an issue: GitHub.