jaeger-agent: --log-level flag not recognized

[cboggs]

The 1.4.1 release of jaeger agent doesn't appear to include the --log-level flag as indicated here and here.

Attempt results:

> docker run -it jaegertracing/jaeger-agent:1.4.1 /go/bin/agent-linux --log-level=warn
Error: unknown flag: --log-level
Usage:
  jaeger-agent [flags]
  jaeger-agent [command]

Available Commands:
  help        Help about any command
  version     Print the version

Flags:
      --collector.host-port string                            comma-separated string representing host:ports of a static list of collectors to connect to directly (e.g. when not using service discovery)
      --config-file string                                    Configuration file in JSON, TOML, YAML, HCL, or Java properties formats (default none). See spf13/viper for precedence.
      --discovery.min-peers int                               if using service discovery, the min number of connections to maintain to the backend (default 3)
  -h, --help                                                  help for jaeger-agent
      --http-server.host-port string                          host:port of the http server (e.g. for /sampling point and /baggage endpoint) (default ":5778")
      --metrics-backend string                                Defines which metrics backend to use for metrics reporting: expvar, prometheus, none (default "prometheus")
      --metrics-http-route string                             Defines the route of HTTP endpoint for metrics backends that support scraping (default "/metrics")
      --processor.jaeger-binary.server-host-port string       host:port for the UDP server (default ":6832")
      --processor.jaeger-binary.server-max-packet-size int    max packet size for the UDP server (default 65000)
      --processor.jaeger-binary.server-queue-size int         length of the queue for the UDP server (default 1000)
      --processor.jaeger-binary.workers int                   how many workers the processor should run (default 10)
      --processor.jaeger-compact.server-host-port string      host:port for the UDP server (default ":6831")
      --processor.jaeger-compact.server-max-packet-size int   max packet size for the UDP server (default 65000)
      --processor.jaeger-compact.server-queue-size int        length of the queue for the UDP server (default 1000)
      --processor.jaeger-compact.workers int                  how many workers the processor should run (default 10)
      --processor.zipkin-compact.server-host-port string      host:port for the UDP server (default ":5775")
      --processor.zipkin-compact.server-max-packet-size int   max packet size for the UDP server (default 65000)
      --processor.zipkin-compact.server-queue-size int        length of the queue for the UDP server (default 1000)
      --processor.zipkin-compact.workers int                  how many workers the processor should run (default 10)

Use "jaeger-agent [command] --help" for more information about a command.

unknown flag: --log-level

[carlislk]

Any updates on this issue? Possibly supported as an env variable?