Download Log from AppEngine Including Python Log Statements

I know you can download the raw access logs with appcfg.py, but I'm really interested in all the information around a specific request like python logging statements, exceptions and api statistics (just like the online log viewer). Does anyone know if there is a way to get that information another way then having to build it yourself?

If case anyone is wondering, we want to do some continuos statistica开发者_StackOverflow中文版l analyzing for problems and displaying them on a large screen on a wall in the office.

Sure - just pass the --severity flag to appcfg.py:

$ appcfg.py help request_logs
Usage: appcfg.py [options] request_logs <directory> <output_file>

Write request logs in Apache common log format.

The 'request_logs' command exports the request logs from your application
to a file.  It will write Apache common log format records ordered
chronologically.  If output file is '-' stdout will be written.

Options:
  -h, --help            Show the help message and exit.
  -q, --quiet           Print errors only.
  -v, --verbose         Print info level logs.
  --noisy               Print all logs.
  -s SERVER, --server=SERVER
                        The server to connect to.
  --insecure            Use HTTP when communicating with the server.
  -e EMAIL, --email=EMAIL
                        The username to use. Will prompt if omitted.
  -H HOST, --host=HOST  Overrides the Host header sent with all RPCs.
  --no_cookies          Do not save authentication cookies to local disk.
  --passin              Read the login password from stdin.
  -A APP_ID, --application=APP_ID
                        Override application from app.yaml file.
  -V VERSION, --version=VERSION
                        Override (major) version from app.yaml file.
  -n NUM_DAYS, --num_days=NUM_DAYS
                        Number of days worth of log data to get. The cut-off
                        point is midnight UTC. Use 0 to get all available
                        logs. Default is 1, unless --append is also given;
                        then the default is 0.
  -a, --append          Append to existing file.
  --severity=SEVERITY   Severity of app-level log messages to get. The range
                        is 0 (DEBUG) through 4 (CRITICAL). If omitted, only
                        request logs are returned.
  --vhost=VHOST         The virtual host of log messages to get. If omitted,
                        all log messages are returned.
  --include_vhost       Include virtual host in log messages.
  --end_date=END_DATE   End date (as YYYY-MM-DD) of period for log data.
                        Defaults to today.

This is what works for us really well:

appcfg.py --append --num_days=0 --include_all request_logs /path/to/your/app/ /var/log/gae/yourapp.log

Anyway, the line above will get all your log records and append them to a log file if you've executed this before, if not, it will create a new log file. It actually looks at your existing log (if it's there) and it will not get any duplicates. You can run this without --append if you want, but use it if you are automating log downloads.

The key here is the --include_allflag which seems to be undocumented. This flag will get all the data that you see if you use GAE's web log viewer. So, you will get fields such as: ms=71 cpu_ms=32 api_cpu_ms=12 cpm_usd=0.000921... etc.

OK, I hope that helps someone.

BTW, we wrote up a blog post on this, check it out here.

I seem to be running into 100M limit with appcfg. I ended up using logservice API to get the logs

Here's the code - https://github.com/manasg/gae-log-fetcher

Here is a way to access raw logs so you can further processing without custom parsing (also for me request_logs is not downloading all the data for specified time frame).

Here is an app which runs in the appengine itself: https://gaelogapp.appspot.com/

You can easily add this functionality to your app with updates to app.yaml and copy logs.py: https://github.com/okigan/gaelogapp