Logging¶

Logging with the systemd journal (CentOS, Amazon AMI, Ubuntu, Debian)¶

On distributions with systemd, ScyllaDB logs are written to the systemd journal. You can retrieve log entries with the journalctl command.

Listed below are a few useful examples.

• get logs generated by the “scylla” user:

  journalctl _UID=`id -u scylla`
  

• get logs generated by the “scylla” command:

  journalctl _COMM=scylla
  

• filter only ScyllaDB logs by priority:

  journalctl _COMM=scylla -p err..emerg
  

  journalctl _COMM=scylla -p warning
  

• filter only ScyllaDB logs by date:

  journalctl _COMM=scylla --since="2013-3-16 23:59:59"
  

  journalctl _COMM=scylla --since "2015-01-10" --until "2015-01-11 03:00"`
  

  journalctl _COMM=scylla --since yesterday
  

• filter only ScyllaDB logs since last server boot:

  journalctl _COMM=scylla -b
  

Logging on Ubuntu 14.04¶

On Ubuntu 14.04, ScyllaDB writes its initial boot message into /var/log/upstart/scylla-server.log.

After ScyllaDB has started, logs are stored in /var/log/syslog. ScyllaDB logs can be filter by creating a rsyslog configuration file with the following rule (for example, in /etc/rsyslog.d/10-scylla.conf)

:syslogtag, startswith, "scylla" /var/log/scylla/scylla.log
& ~

And then creating the log file with the correct permissions and restarting the service:

install -o syslog -g adm -m 0640 /dev/null /var/log/scylla/scylla.log
service rsyslog restart

This will send ScyllaDB only logs to /var/log/scylla/scylla.log

Logging on Docker¶

Starting from ScyllaDB 1.3, ScyllaDB Docker, you should use docker logs command to access ScyllaDB server logs.

Getting Started