log.level is set but not picked up

[reachlin]

What did you do?
pass in -log.level=debug, but the logs have no debug messages

te$ docker inspect prometheus|grep -10 Cmd
            "AttachStderr": false,
            "ExposedPorts": {
                "9090/tcp": {}
            },
            "Tty": false,
            "OpenStdin": false,
            "StdinOnce": false,
            "Env": [
                "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
            ],
            "Cmd": [
                "-config.file=/etc/prometheus/prometheus.yml",
                "-storage.local.path=/prometheus",
                "-web.console.libraries=/usr/share/prometheus/console_libraries",
                "-web.console.templates=/usr/share/prometheus/consoles",
                "-log.level=debug"
            ],

What did you expect to see?
debug messages in log

What did you see instead? Under which circumstances?

te$ docker logs prometheus
time="2017-04-18T08:09:05Z" level=info msg="Starting prometheus (version=1.5.2, branch=master, revision=bd1182d29f462c39544f94cc822830e1c64cf55b)" source="main.go:75" 
time="2017-04-18T08:09:05Z" level=info msg="Build context (go=go1.7.5, user=root@1a01c5f68840, date=20170210-16:23:28)" source="main.go:76" 
time="2017-04-18T08:09:05Z" level=info msg="Loading configuration file /etc/prometheus/prometheus.yml" source="main.go:248" 
time="2017-04-18T08:09:05Z" level=info msg="Loading series map and head chunks..." source="storage.go:373" 
time="2017-04-18T08:09:05Z" level=info msg="0 series loaded." source="storage.go:378" 
time="2017-04-18T08:09:05Z" level=info msg="Starting target manager..." source="targetmanager.go:61" 
time="2017-04-18T08:09:05Z" level=info msg="Listening on :9090" source="web.go:259" 
time="2017-04-18T08:14:05Z" level=info msg="Checkpointing in-memory metrics and chunks..." source="persistence.go:612" 
time="2017-04-18T08:14:05Z" level=info msg="Done checkpointing in-memory metrics and chunks in 15.265889ms." source="persistence.go:639" 
time="2017-04-18T08:19:05Z" level=info msg="Checkpointing in-memory metrics and chunks..." source="persistence.go:612" 
time="2017-04-18T08:19:05Z" level=info msg="Done checkpointing in-memory metrics and chunks in 14.846808ms." source="persistence.go:639" 

Environment

• System information:

  run in docker

• Prometheus version:

te$ docker exec -it prometheus prometheus -version
prometheus, version 1.5.2 (branch: master, revision: bd1182d29f462c39544f94cc822830e1c64cf55b)
  build user:       root@1a01c5f68840
  build date:       20170210-16:23:28
  go version:       go1.7.5

• Alertmanager version:

  insert output of alertmanager -version here (if relevant to the issue)

• Prometheus configuration file:

insert configuration here

• Alertmanager configuration file:

n/a

• Logs:

n/a

[brian-brazil]

Dupe of #2330

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.