Redis Enterprise comes with a set of logs on the server and available through the user interface to assist users in investigating actions taken on the server and to troubleshoot issues.

Send logs to a remote logging server

Redis Enterprise sends logs to syslog by default. You can send these logs to a remote logging server by configuring syslog.

To do this, modify the syslog or rsyslog configuration on your operating system to send logs in the $logdir directory (/var/opt/redislabs/log in default installations) to a remote monitoring server of your choice.

Log rotation

Redis Enterprise Software’s job scheduler runs logrotate every five minutes to examine logs stored on the operating system and rotate them based on the log rotation configuration. You can find the log rotation configuration file at $pkgconfdir/logrotate.conf as of Redis Enterprise Software version 7.2 (pkgconfdir is /opt/redislabs/config by default, but can be changed in a custom installation).

By default, log rotation occurs when a log exceeds 200 MB. We recommend sending log files to a remote logging server so you can maintain them more effectively.

The following log rotation policy is enabled by default in Redis Enterprise Software, but you can modify it as needed.

/var/opt/redislabs/log/*.log {
    su ${osuser} ${osgroup}
    size 200M
    missingok
    copytruncate
    # 2000 is logrotate's way of saying 'infinite'
    rotate 2000
    maxage 7
    compress
    notifempty
    nodateext
    nosharedscripts
    prerotate
        # copy cluster_wd log to another file that will have longer retention
        if [ "\$1" = "/var/opt/redislabs/log/cluster_wd.log" ]; then
        	cp -p /var/opt/redislabs/log/cluster_wd.log /var/opt/redislabs/log/cluster_wd.log.long_retention
        fi
    endscript
}
/var/opt/redislabs/log/cluster_wd.log.long_retention {
    su ${osuser} ${osgroup}
    daily
    missingok
    copytruncate
    rotate 30
    compress
    notifempty
    nodateext
}

  • /var/opt/redislabs/log/*.log - logrotate checks the files under the $logdir directory (/var/opt/redislabs/log/) and rotates any files that end with the extension .log.

  • /var/opt/redislabs/log/cluster_wd.log.long_retention - The contents of cluster_wd.log is copied to cluster_wd.log.long_retention before rotation, and this copy is kept for longer than normal (30 days).

  • size 200M - Rotate log files that exceed 200 MB.

  • missingok - If there are missing log files, do nothing.

  • copytruncate - Truncate the original log file to zero sizes after creating a copy.

  • rotate 2000 - Keep up to 2000 (effectively infinite) log files.

  • compress - gzip log files.

  • maxage 7 - Keep the rotated log files for 7 days.

  • notifempty - Don’t rotate the log file if it is empty.

Note:
For large scale deployments, you might need to rotate logs at faster intervals than daily. You can also use a cronjob or external vendor solutions.