Gunicorn: Gunicorn doesn't print access log to stdout/stderr

[msoedov]

I'm using containerized gunicorn process which I run by:

CMD gunicorn app:app -w 1 -b 0:44332 -t 300 --log-level debug --threads 5 --access-logfile - --error-logfile -

However I did manage to find an easy way in the docs how to make it print access log to stdout.
--access-logfile - doesn't work as it documented on http://docs.gunicorn.org/en/stable/settings.html#accesslog
Config for gunicorn==19.6.0

[2016-11-22 20:45:57 +0000] [7] [DEBUG] Current configuration:
  secure_scheme_headers: {'X-FORWARDED-PROTOCOL': 'ssl', 'X-FORWARDED-PROTO': 'https', 'X-FORWARDED-SSL': 'on'}
  proxy_protocol: False
  worker_connections: 1000
  statsd_host: None
  max_requests_jitter: 0
  post_fork: <function post_fork at 0x7ff56a1a45f0>
  pythonpath: None
  enable_stdio_inheritance: False
  worker_class: sync
  ssl_version: 3
  suppress_ragged_eofs: True
  syslog: False
  syslog_facility: user
  when_ready: <function when_ready at 0x7ff56a1a4320>
  pre_fork: <function pre_fork at 0x7ff56a1a4488>
  cert_reqs: 0
  preload_app: False
  keepalive: 2
  accesslog: -
  group: 0
  graceful_timeout: 30
  do_handshake_on_connect: False
  spew: False
  workers: 1
  proc_name: None
  sendfile: None
  pidfile: None
  umask: 0
  on_reload: <function on_reload at 0x7ff56a1a41b8>
  pre_exec: <function pre_exec at 0x7ff56a1a4b90>
  worker_tmp_dir: None
  post_worker_init: <function post_worker_init at 0x7ff56a1a4758>
  limit_request_fields: 100
  on_exit: <function on_exit at 0x7ff56a1e62a8>
  config: None
  logconfig: None
  check_config: False
  statsd_prefix:
  proxy_allow_ips: ['127.0.0.1']
  pre_request: <function pre_request at 0x7ff56a1a4cf8>
  post_request: <function post_request at 0x7ff56a1a4de8>
  user: 0
  forwarded_allow_ips: ['127.0.0.1']
  worker_int: <function worker_int at 0x7ff56a1a48c0>
  threads: 5
  max_requests: 0
  limit_request_line: 4094
  access_log_format: %(h)s %(l)s %(u)s %(t)s "%(r)s" %(s)s %(b)s "%(f)s" "%(a)s"
  certfile: None
  worker_exit: <function worker_exit at 0x7ff56a1a4f50>
  chdir: /app
  paste: None
  default_proc_name: app:app
  errorlog: -
  loglevel: debug
  capture_output: False
  syslog_addr: udp://localhost:514
  syslog_prefix: None
  daemon: False
  ciphers: TLSv1
  on_starting: <function on_starting at 0x7ff56a1a4050>
  worker_abort: <function worker_abort at 0x7ff56a1a4a28>
  bind: ['0:44332']
  raw_env: []
  reload: False
  limit_request_field_size: 8190
  nworkers_changed: <function nworkers_changed at 0x7ff56a1e6140>
  timeout: 300
  ca_certs: None
  django_settings: None
  tmp_upload_dir: None
  keyfile: None
  backlog: 2048
  logger_class: gunicorn.glogging.Logger

[romabysen]

I'm using Gunicorn with Amazon ECS and --access-logfile - works exactly as documented; it prints the accesslog to stderr.

[benoitc]

closing issue as "work as documented". Feel free to open a new one if you want to discuss a possible change of the current behaviour.

[yamila-moreno]

Hi! I hope this is the proper place to ask about it; I'm using gunicorn (v19.7.1) and failing at finding logs in stdoutput. The command, as I understand the documentation is:

gunicorn -b 0.0.0.0:6007 --access-logfile - --error-logfile - --log-level debug 'wsgi:load_application()' 

Then, when I make any http request to the application I cannot see any log in the gunicorn terminal (although the application is responding properly to the request).
I've also tried with export PYTHONUNBUFFERED with same result.

Am I using gunicorn wrong? Could anyone provide a hint? Thanks in advance!!

[berkerpeksag]

@yamila-moreno I just tried the command you pasted with examples/test.py and I was able to see access logs in the terminal:

$ gunicorn -b 0.0.0.0:6007 --access-logfile - --error-logfile - --log-level debug test:app
[2018-03-22 17:42:29 +0300] [24642] [DEBUG] Current configuration:
[...snipped...]
[2018-03-22 17:42:29 +0300] [24642] [INFO] Starting gunicorn 19.7.1
[2018-03-22 17:42:29 +0300] [24642] [DEBUG] Arbiter booted
[2018-03-22 17:42:29 +0300] [24642] [INFO] Listening at: http://0.0.0.0:6007 (24642)
[2018-03-22 17:42:29 +0300] [24642] [INFO] Using worker: sync
[2018-03-22 17:42:29 +0300] [24645] [INFO] Booting worker with pid: 24645
[2018-03-22 17:42:29 +0300] [24642] [DEBUG] 1 workers
[2018-03-22 17:42:32 +0300] [24645] [DEBUG] GET /
127.0.0.1 - - [22/Mar/2018:17:42:32 +0300] "GET / HTTP/1.1" 200 14 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36"
[2018-03-22 17:42:33 +0300] [24645] [DEBUG] GET /favicon.ico
127.0.0.1 - - [22/Mar/2018:17:42:33 +0300] "GET /favicon.ico HTTP/1.1" 200 14 "http://0.0.0.0:6007/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36"
[2018-03-22 17:42:39 +0300] [24645] [DEBUG] GET /
127.0.0.1 - - [22/Mar/2018:17:42:39 +0300] "GET / HTTP/1.1" 200 14 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36"
[2018-03-22 17:42:40 +0300] [24645] [DEBUG] GET /favicon.ico
127.0.0.1 - - [22/Mar/2018:17:42:40 +0300] "GET /favicon.ico HTTP/1.1" 200 14 "http://0.0.0.0:6007/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36"

[yamila-moreno]

@berkerpeksag thanks for your answer. I was hoping I just misunderstood the documentation. At least I can stop looking there, and find the error in another place. When (if) I finally find the solution, I'll paste here, so it may be useful for someone.

[yamila-moreno]

@berkerpeksag sorry for bothering with this, but could you paste also the first part of your gunicorn command? the part "...snipped..."; I'd like to check if there is anything different that I could use as a hint.

thanks!!

[berkerpeksag]

Here it is:

  keepalive: 2
  pidfile: None
  config: None
  keyfile: None
  enable_stdio_inheritance: False
  threads: 1
  preload_app: False
  initgroups: False
  worker_abort: <function WorkerAbort.worker_abort at 0x7fd287b241e0>
  post_request: <function PostRequest.post_request at 0x7fd287b24620>
  nworkers_changed: <function NumWorkersChanged.nworkers_changed at 0x7fd287b24ae8>
  cert_reqs: 0
  statsd_prefix: 
  ssl_version: 2
  suppress_ragged_eofs: True
  ciphers: TLSv1
  worker_connections: 1000
  max_requests: 0
  on_exit: <function OnExit.on_exit at 0x7fd287b24c80>
  timeout: 30
  chdir: /home/berker/projects/gunicorn/examples
  raw_env: []
  group: 1000
  forwarded_allow_ips: ['127.0.0.1']
  accesslog: -
  capture_output: False
  pre_exec: <function PreExec.pre_exec at 0x7fd287b24378>
  worker_tmp_dir: None
  post_fork: <function Postfork.post_fork at 0x7fd287b1cc80>
  secure_scheme_headers: {'X-FORWARDED-PROTOCOL': 'ssl', 'X-FORWARDED-SSL': 'on', 'X-FORWARDED-PROTO': 'https'}
  default_proc_name: test:app
  worker_int: <function WorkerInt.worker_int at 0x7fd287b24048>
  errorlog: -
  loglevel: debug
  syslog_prefix: None
  syslog_facility: user
  on_starting: <function OnStarting.on_starting at 0x7fd287b1c620>
  worker_exit: <function WorkerExit.worker_exit at 0x7fd287b24950>
  paste: None
  backlog: 2048
  sendfile: None
  user: 1000
  workers: 1
  syslog_addr: udp://localhost:514
  limit_request_fields: 100
  statsd_host: None
  proc_name: None
  check_config: False
  when_ready: <function WhenReady.when_ready at 0x7fd287b1c950>
  child_exit: <function ChildExit.child_exit at 0x7fd287b247b8>
  proxy_protocol: False
  limit_request_field_size: 8190
  raw_paste_global_conf: []
  reload: False
  spew: False
  ca_certs: None
  proxy_allow_ips: ['127.0.0.1']
  limit_request_line: 4094
  reload_engine: auto
  daemon: False
  umask: 0
  tmp_upload_dir: None
  logger_class: gunicorn.glogging.Logger
  pre_fork: <function Prefork.pre_fork at 0x7fd287b1cae8>
  post_worker_init: <function PostWorkerInit.post_worker_init at 0x7fd287b1ce18>
  worker_class: sync
  pre_request: <function PreRequest.pre_request at 0x7fd287b24510>
  logconfig: None
  do_handshake_on_connect: False
  max_requests_jitter: 0
  certfile: None
  graceful_timeout: 30
  bind: ['0.0.0.0:6007']
  on_reload: <function OnReload.on_reload at 0x7fd287b1c7b8>
  access_log_format: %(h)s %(l)s %(u)s %(t)s "%(r)s" %(s)s %(b)s "%(f)s" "%(a)s"
  pythonpath: None
  syslog: False

[yamila-moreno]

Hi there!! @berkerpeksag thanks for your help. I realised that the problem was the configuration with the logging package.
Then I found this post which helped me to configure this properly.

[dave4jr]

@berkerpeksag @benoitc Hey guys, is there a way to disable the current configuration from being printed out when on DEBUG log level? (similar to the snipped section above).

[secsilm]

FYI, if you use logging.config.fileConfig() or logging.config.dictConfig(), then you should set disable_existing_loggers to False. If it's True, it will disable gunicorn logger. For detail please see Logging HOWTO — Python 3.8.1rc1 documentation.

[benoitc]

@dave4jr nope, why?

[danalexandrucraciun]

I'm using Gunicorn with Amazon ECS and --access-logfile - works exactly as documented; it prints the accesslog to stderr.

@romabysen interesting. Do you still have the command?

I'm using the container with my gunicorn in ecs, and I have a startup.sh in docker file with this command to start the server, but it's not delivering the log to stdout.

This is my dockerfile:

This is the server :

[danalexandrucraciun]

@msoedov did you find the solution to print the log in stdout using the containerized gunicorn?