Managing log files
Overview
When Cloud 66 provisions servers, we automatically configure logging for various services. There are several logs available for different server components. Depending on the specifics of your application, log names and directories may vary. The information below is for a typical case.
Rails applications
Default Rails deployments
Default Rails deployments on Cloud 66 use Passenger (via Nginx) and the logs are stored in $STACK_PATH/log
:
- Application (Rails) log:
$STACK_PATH/log/<environment>.log
- Nginx error (server) log:
$STACK_PATH/log/nginx_error.log
- Background processes:
$STACK_PATH/log/<PROCESS_NAME>_<NUMBER_OF_PROCESS>.log
Custom Rails deployments
If you are using a custom web server, such as Puma, Thin or Unicorn then your log files will be as follows:
- Application (Rails) log:
$STACK_PATH/log/<environment>.log
- Application logs (STDOUT + STDERR):
- Web:
$STACK_PATH/log/custom_web.log
- Background processes:
$STACK_PATH/log/<PROCESS_NAME>_<NUMBER_OF_PROCESS>.log
- Web:
- System logs
- Web server:
sudo journalctl -u cloud66_web_server
- Background processes:
sudo journalctl -u cloud66_process_<PROCESS_NAME>@* -f
- Web server:
Other log directories
- Auth requests, Fail2Ban:
/var/log
- Nginx access and errors:
/opt/nginx/logs
Log rotation
Your logs in $STACK_PATH/log
and /var/log
are automatically rotated on a daily basis and by default kept for 14 days into a sub-directory called archive
in each respective directory. These logs are compressed, and can be uncompressed with the following command:
gzip -d <log_file>.log.gz
.
You can set the frequency and the number of rotations to be kept using the Cloud 66 Toolbelt.